{"id":9728,"date":"2026-09-23T09:00:00","date_gmt":"2026-09-23T09:00:00","guid":{"rendered":"https:\/\/otus.ru\/journal\/?p=9728"},"modified":"2026-09-25T15:33:37","modified_gmt":"2026-09-25T15:33:37","slug":"vse-o-keshirovanii-i-keshah","status":"publish","type":"post","link":"https:\/\/otus.ru\/journal\/vse-o-keshirovanii-i-keshah\/","title":{"rendered":"\u041a\u044d\u0448 \u0438 \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435: \u0447\u0442\u043e \u044d\u0442\u043e, \u043a\u0430\u043a \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u0438 \u0433\u0434\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f"},"content":{"rendered":"<p><strong>\u041a\u044d\u0448<\/strong> (\u0438\u043b\u0438 \u043a\u0435\u0448) &#8212; \u044d\u0442\u043e \u0431\u044b\u0441\u0442\u0440\u043e\u0435 \u043f\u0440\u043e\u043c\u0435\u0436\u0443\u0442\u043e\u0447\u043d\u043e\u0435 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435, \u0433\u0434\u0435 \u043b\u0435\u0436\u0438\u0442 \u043a\u043e\u043f\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0441\u043a\u043e\u0440\u0435\u0435 \u0432\u0441\u0435\u0433\u043e \u043f\u043e\u043d\u0430\u0434\u043e\u0431\u044f\u0442\u0441\u044f \u0441\u043d\u043e\u0432\u0430. <strong>\u041a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435<\/strong> &#8212; \u043f\u0440\u0438\u0435\u043c, \u043f\u0440\u0438 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u0434\u043e\u0440\u043e\u0433\u043e\u0439 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 (\u0447\u0442\u0435\u043d\u0438\u044f \u0441 \u0434\u0438\u0441\u043a\u0430, \u0437\u0430\u043f\u0440\u043e\u0441\u0430 \u043a \u0431\u0430\u0437\u0435, \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u043f\u043e \u0441\u0435\u0442\u0438) \u0441\u043e\u0445\u0440\u0430\u043d\u044f\u044e\u0442 \u0431\u043b\u0438\u0436\u0435 \u043a \u043c\u0435\u0441\u0442\u0443 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0438 \u043f\u0440\u0438 \u043f\u043e\u0432\u0442\u043e\u0440\u043d\u043e\u043c \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0438 \u0431\u0435\u0440\u0443\u0442 \u043a\u043e\u043f\u0438\u044e, \u0430 \u043d\u0435 \u0438\u0434\u0443\u0442 \u0432 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a.<\/p>\n<div class=\"oj-toc\" style=\"background:#f6f6f6;border-radius:8px;padding:14px 20px;margin:20px 0\">\n<p><strong>\u0421\u043e\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u0435<\/strong><\/p>\n<ol>\n<li><a href=\"#s1\">\u041a\u0430\u043a \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u043a\u044d\u0448: \u043f\u043e\u043f\u0430\u0434\u0430\u043d\u0438\u0435 \u0438 \u043f\u0440\u043e\u043c\u0430\u0445<\/a><\/li>\n<li><a href=\"#s2\">\u0423\u0440\u043e\u0432\u043d\u0438 \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f: \u043e\u0442 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430 \u0434\u043e \u0431\u0430\u0437\u044b \u0434\u0430\u043d\u043d\u044b\u0445<\/a><\/li>\n<li><a href=\"#s3\">\u041a\u044d\u0448 \u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0435 \u0438 HTTP-\u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043a\u0438<\/a><\/li>\n<li><a href=\"#s4\">\u0421\u0442\u0440\u0430\u0442\u0435\u0433\u0438\u0438 \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0432 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0438<\/a><\/li>\n<li><a href=\"#s5\">\u0418\u043d\u0432\u0430\u043b\u0438\u0434\u0430\u0446\u0438\u044f: \u0433\u043b\u0430\u0432\u043d\u0430\u044f \u043e\u0448\u0438\u0431\u043a\u0430 \u043f\u0440\u0438 \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0438<\/a><\/li>\n<li><a href=\"#s6\">TTL \u0438 \u0432\u044b\u0442\u0435\u0441\u043d\u0435\u043d\u0438\u0435: LRU, LFU, FIFO<\/a><\/li>\n<li><a href=\"#s7\">\u041a\u043e\u0433\u0434\u0430 \u043a\u044d\u0448 \u0432\u0440\u0435\u0434\u0438\u0442 \u0438 \u043a\u0430\u043a \u043f\u043e\u0447\u0438\u0441\u0442\u0438\u0442\u044c \u043a\u044d\u0448 \u0432\u0440\u0443\u0447\u043d\u0443\u044e<\/a><\/li>\n<li><a href=\"#s8\">\u0412\u044b\u0432\u043e\u0434\u044b<\/a><\/li>\n<li><a href=\"#s9\">\u0413\u0434\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f \/ \u0441\u0432\u044f\u0437\u044c \u0441 \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u043e\u0439<\/a><\/li>\n<li><a href=\"#s10\">FAQ<\/a><\/li>\n<\/ol>\n<\/div>\n<p>\u0412\u0430\u0436\u043d\u043e \u0440\u0430\u0437\u043b\u0438\u0447\u0430\u0442\u044c \u0442\u0440\u0438 \u0432\u0435\u0449\u0438: <strong>\u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a<\/strong> (\u0431\u0430\u0437\u0430, \u0441\u0435\u0440\u0432\u0435\u0440, \u0434\u0438\u0441\u043a &#8212; \u0442\u0430\u043c \u00ab\u043f\u0440\u0430\u0432\u0434\u0430\u00bb), <strong>\u043a\u044d\u0448<\/strong> (\u043a\u043e\u043f\u0438\u044f, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043c\u043e\u0436\u0435\u0442 \u0443\u0441\u0442\u0430\u0440\u0435\u0442\u044c) \u0438 <strong>\u043f\u043e\u043b\u0438\u0442\u0438\u043a\u0443<\/strong> (\u043a\u043e\u0433\u0434\u0430 \u043a\u043e\u043f\u0438\u044e \u043a\u043b\u0430\u0441\u0442\u044c, \u0441\u043a\u043e\u043b\u044c\u043a\u043e \u0445\u0440\u0430\u043d\u0438\u0442\u044c \u0438 \u043a\u043e\u0433\u0434\u0430 \u0432\u044b\u0431\u0440\u0430\u0441\u044b\u0432\u0430\u0442\u044c). \u041f\u043e\u0447\u0442\u0438 \u0432\u0441\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0441 \u043a\u044d\u0448\u0435\u043c &#8212; \u0438\u0437-\u0437\u0430 \u0442\u043e\u0433\u043e, \u0447\u0442\u043e \u043a\u043e\u043f\u0438\u044f \u0440\u0430\u0437\u043e\u0448\u043b\u0430\u0441\u044c \u0441 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u043e\u043c. \u041d\u0438\u0436\u0435 &#8212; \u0443\u0440\u043e\u0432\u043d\u0438 \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f, \u0441\u0442\u0440\u0430\u0442\u0435\u0433\u0438\u0438 \u0437\u0430\u043f\u0438\u0441\u0438, TTL, LRU \u0438 \u0438\u043d\u0432\u0430\u043b\u0438\u0434\u0430\u0446\u0438\u044f \u0441 \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u0435\u043c\u044b\u043c\u0438 \u043f\u0440\u0438\u043c\u0435\u0440\u0430\u043c\u0438.<\/p>\n<h2 id=\"s1\">\u041a\u0430\u043a \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u043a\u044d\u0448: \u043f\u043e\u043f\u0430\u0434\u0430\u043d\u0438\u0435 \u0438 \u043f\u0440\u043e\u043c\u0430\u0445<\/h2>\n<p>\u041b\u044e\u0431\u043e\u0439 \u043a\u044d\u0448 \u043e\u0442\u0432\u0435\u0447\u0430\u0435\u0442 \u043d\u0430 \u043e\u0434\u0438\u043d \u0432\u043e\u043f\u0440\u043e\u0441: \u0435\u0441\u0442\u044c \u043b\u0438 \u0443 \u043c\u0435\u043d\u044f \u0441\u0432\u0435\u0436\u0430\u044f \u043a\u043e\u043f\u0438\u044f \u043f\u043e \u044d\u0442\u043e\u043c\u0443 \u043a\u043b\u044e\u0447\u0443?<\/p>\n<ul>\n<li><strong>\u041f\u043e\u043f\u0430\u0434\u0430\u043d\u0438\u0435 (cache hit)<\/strong> &#8212; \u043a\u043e\u043f\u0438\u044f \u0435\u0441\u0442\u044c \u0438 \u0435\u0449\u0435 \u0433\u043e\u0434\u043d\u0430, \u043e\u0442\u0432\u0435\u0442 \u043e\u0442\u0434\u0430\u0435\u0442\u0441\u044f \u0431\u044b\u0441\u0442\u0440\u043e.<\/li>\n<li><strong>\u041f\u0440\u043e\u043c\u0430\u0445 (cache miss)<\/strong> &#8212; \u043a\u043e\u043f\u0438\u0438 \u043d\u0435\u0442 \u0438\u043b\u0438 \u043e\u043d\u0430 \u0443\u0441\u0442\u0430\u0440\u0435\u043b\u0430, \u0437\u0430\u043f\u0440\u043e\u0441 \u0438\u0434\u0435\u0442 \u0432 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a, \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u043a\u043b\u0430\u0434\u0435\u0442\u0441\u044f \u0432 \u043a\u044d\u0448.<\/li>\n<li><strong>\u0414\u043e\u043b\u044f \u043f\u043e\u043f\u0430\u0434\u0430\u043d\u0438\u0439 (hit ratio)<\/strong> &#8212; \u0433\u043b\u0430\u0432\u043d\u0430\u044f \u043c\u0435\u0442\u0440\u0438\u043a\u0430: \u0435\u0441\u043b\u0438 \u043f\u043e\u043f\u0430\u0434\u0430\u043d\u0438\u0439 \u043c\u0430\u043b\u043e, \u043a\u044d\u0448 \u0442\u043e\u043b\u044c\u043a\u043e \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u0442 \u043b\u0438\u0448\u043d\u0438\u0439 \u0448\u0430\u0433 \u0438 \u0440\u0430\u0441\u0445\u043e\u0434 \u043f\u0430\u043c\u044f\u0442\u0438.<\/li>\n<\/ul>\n<p>\u041c\u0438\u043d\u0438\u043c\u0430\u043b\u044c\u043d\u044b\u0439 \u0440\u0430\u0431\u043e\u0447\u0438\u0439 \u043f\u0440\u0438\u043c\u0435\u0440 &#8212; \u043a\u044d\u0448 \u043f\u0435\u0440\u0435\u0434 \u00ab\u043c\u0435\u0434\u043b\u0435\u043d\u043d\u043e\u0439 \u0431\u0430\u0437\u043e\u0439\u00bb \u0441\u043e \u0441\u0440\u043e\u043a\u043e\u043c \u0436\u0438\u0437\u043d\u0438 \u0437\u0430\u043f\u0438\u0441\u0438 (TTL). \u041f\u0440\u043e\u0432\u0435\u0440\u0435\u043d\u043e \u043d\u0430 Python 3.14:<\/p>\n<pre style=\"background:#282c34;color:#abb2bf;border-radius:8px;padding:16px 20px;margin:20px 0;overflow-x:auto;font-size:14px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\"><code style=\"background:none\"><span style=\"color: #C678DD\">import<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E06C75\">time<\/span>\n\n<span style=\"color: #E06C75\">DB<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #ABB2BF\">{<\/span><span style=\"color: #98C379\">\"course:1\"<\/span><span style=\"color: #ABB2BF\">:<\/span> <span style=\"color: #98C379\">\"Python Developer\"<\/span><span style=\"color: #ABB2BF\">}<\/span>   <span style=\"color: #7F848E\"># \"\u043c\u0435\u0434\u043b\u0435\u043d\u043d\u0430\u044f\" \u0431\u0430\u0437\u0430<\/span>\n<span style=\"color: #E06C75\">db_reads<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #D19A66\">0<\/span>\n\n<span style=\"color: #C678DD\">def<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #61AFEF; font-weight: bold\">db_get<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">):<\/span>\n    <span style=\"color: #C678DD\">global<\/span> <span style=\"color: #E06C75\">db_reads<\/span>\n    <span style=\"color: #E06C75\">db_reads<\/span> <span style=\"color: #56B6C2\">+=<\/span> <span style=\"color: #D19A66\">1<\/span>\n    <span style=\"color: #E06C75\">time<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">sleep<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #D19A66\">0.2<\/span><span style=\"color: #ABB2BF\">)<\/span>                     <span style=\"color: #7F848E\"># \u0438\u043c\u0438\u0442\u0430\u0446\u0438\u044f \u0437\u0430\u043f\u0440\u043e\u0441\u0430 \u043a \u0411\u0414<\/span>\n    <span style=\"color: #C678DD\">return<\/span> <span style=\"color: #E06C75\">DB<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">get<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">)<\/span>\n\n<span style=\"color: #E06C75\">cache<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #ABB2BF\">{}<\/span>                              <span style=\"color: #7F848E\"># key -&gt; (value, expires_at)<\/span>\n<span style=\"color: #E06C75\">TTL<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #D19A66\">60<\/span>                                <span style=\"color: #7F848E\"># \u0441\u0435\u043a\u0443\u043d\u0434<\/span>\n\n<span style=\"color: #C678DD\">def<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #61AFEF; font-weight: bold\">get<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">):<\/span>\n    <span style=\"color: #E06C75\">item<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #E06C75\">cache<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">get<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">)<\/span>\n    <span style=\"color: #C678DD\">if<\/span> <span style=\"color: #E06C75\">item<\/span> <span style=\"color: #56B6C2\">and<\/span> <span style=\"color: #E06C75\">item<\/span><span style=\"color: #ABB2BF\">[<\/span><span style=\"color: #D19A66\">1<\/span><span style=\"color: #ABB2BF\">]<\/span> <span style=\"color: #56B6C2\">&gt;<\/span> <span style=\"color: #E06C75\">time<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">monotonic<\/span><span style=\"color: #ABB2BF\">():<\/span>\n        <span style=\"color: #C678DD\">return<\/span> <span style=\"color: #E06C75\">item<\/span><span style=\"color: #ABB2BF\">[<\/span><span style=\"color: #D19A66\">0<\/span><span style=\"color: #ABB2BF\">],<\/span> <span style=\"color: #98C379\">\"hit\"<\/span>\n    <span style=\"color: #E06C75\">value<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #E06C75\">db_get<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">)<\/span>                 <span style=\"color: #7F848E\"># \u043f\u0440\u043e\u043c\u0430\u0445: \u0438\u0434\u0435\u043c \u0432 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a<\/span>\n    <span style=\"color: #E06C75\">cache<\/span><span style=\"color: #ABB2BF\">[<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">]<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">value<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #E06C75\">time<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">monotonic<\/span><span style=\"color: #ABB2BF\">()<\/span> <span style=\"color: #56B6C2\">+<\/span> <span style=\"color: #E06C75\">TTL<\/span><span style=\"color: #ABB2BF\">)<\/span>\n    <span style=\"color: #C678DD\">return<\/span> <span style=\"color: #E06C75\">value<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #98C379\">\"miss\"<\/span>\n\n<span style=\"color: #C678DD\">for<\/span> <span style=\"color: #E06C75\">_<\/span> <span style=\"color: #56B6C2\">in<\/span> <span style=\"color: #E5C07B\">range<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #D19A66\">3<\/span><span style=\"color: #ABB2BF\">):<\/span>\n    <span style=\"color: #E06C75\">t0<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #E06C75\">time<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">perf_counter<\/span><span style=\"color: #ABB2BF\">()<\/span>\n    <span style=\"color: #E06C75\">value<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #E06C75\">status<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #E06C75\">get<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"course:1\"<\/span><span style=\"color: #ABB2BF\">)<\/span>\n    <span style=\"color: #E06C75\">ms<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">time<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">perf_counter<\/span><span style=\"color: #ABB2BF\">()<\/span> <span style=\"color: #56B6C2\">-<\/span> <span style=\"color: #E06C75\">t0<\/span><span style=\"color: #ABB2BF\">)<\/span> <span style=\"color: #56B6C2\">*<\/span> <span style=\"color: #D19A66\">1000<\/span>\n    <span style=\"color: #E5C07B\">print<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">f\"{<\/span><span style=\"color: #E06C75\">status<\/span><span style=\"color: #98C379\">:4} {<\/span><span style=\"color: #E06C75\">value<\/span><span style=\"color: #98C379\">} {<\/span><span style=\"color: #E06C75\">ms<\/span><span style=\"color: #98C379\">:.0f} \u043c\u0441\"<\/span><span style=\"color: #ABB2BF\">)<\/span>\n<span style=\"color: #E5C07B\">print<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"\u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0439 \u043a \u0411\u0414:\"<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #E06C75\">db_reads<\/span><span style=\"color: #ABB2BF\">)<\/span><\/code><\/pre>\n<p>\u0420\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u043f\u0440\u043e\u0433\u043e\u043d\u0430: \u043f\u0435\u0440\u0432\u044b\u0439 \u0432\u044b\u0437\u043e\u0432 &#8212; \u043f\u0440\u043e\u043c\u0430\u0445 \u0438 \u043e\u043a\u043e\u043b\u043e 200 \u043c\u0441 (\u0432\u0440\u0435\u043c\u044f \u0437\u0430\u0432\u0438\u0441\u0438\u0442 \u043e\u0442 \u043c\u0430\u0448\u0438\u043d\u044b), \u0434\u0432\u0430 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0445 &#8212; \u043f\u043e\u043f\u0430\u0434\u0430\u043d\u0438\u044f \u043f\u043e\u0447\u0442\u0438 \u0437\u0430 0 \u043c\u0441, \u0432 \u0431\u0430\u0437\u0443 \u0443\u0448\u0435\u043b \u043e\u0434\u0438\u043d \u0437\u0430\u043f\u0440\u043e\u0441.<\/p>\n<pre style=\"background:#282c34;color:#abb2bf;border-radius:8px;padding:16px 20px;margin:20px 0;overflow-x:auto;font-size:14px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\"><code style=\"background:none\">miss Python Developer 204 \u043c\u0441\nhit  Python Developer 0 \u043c\u0441\nhit  Python Developer 0 \u043c\u0441\n\u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0439 \u043a \u0411\u0414: 1\n<\/code><\/pre>\n<p>\u0427\u0442\u043e \u0437\u0434\u0435\u0441\u044c \u0432\u0430\u0436\u043d\u043e. \u041a\u043b\u044e\u0447 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">course:1<\/code> \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u0435\u0442, \u043a\u0430\u043a\u0438\u0435 \u0434\u0430\u043d\u043d\u044b\u0435 \u043b\u0435\u0436\u0430\u0442 \u0432 \u0437\u0430\u043f\u0438\u0441\u0438. <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">expires_at<\/code> \u0445\u0440\u0430\u043d\u0438\u0442 \u043c\u043e\u043c\u0435\u043d\u0442 \u0438\u0441\u0442\u0435\u0447\u0435\u043d\u0438\u044f, \u0430 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">time.monotonic()<\/code> \u043d\u0435 \u0437\u0430\u0432\u0438\u0441\u0438\u0442 \u043e\u0442 \u043f\u0435\u0440\u0435\u0432\u043e\u0434\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u044b\u0445 \u0447\u0430\u0441\u043e\u0432. \u041a\u043e\u0433\u0434\u0430 TTL \u0438\u0441\u0442\u0435\u0447\u0435\u0442, \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439 \u0432\u044b\u0437\u043e\u0432 \u0441\u043d\u043e\u0432\u0430 \u0441\u0442\u0430\u043d\u0435\u0442 \u043f\u0440\u043e\u043c\u0430\u0445\u043e\u043c \u0438 \u043f\u0435\u0440\u0435\u0447\u0438\u0442\u0430\u0435\u0442 \u0431\u0430\u0437\u0443. \u042d\u0442\u043e\u0442 \u043f\u0440\u0438\u043c\u0435\u0440 &#8212; \u0443\u0447\u0435\u0431\u043d\u044b\u0439: \u043e\u043d \u043e\u0434\u043d\u043e\u043f\u043e\u0442\u043e\u0447\u043d\u044b\u0439 \u0438 \u0440\u0430\u0441\u0442\u0435\u0442 \u0431\u0435\u0437 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f \u0440\u0430\u0437\u043c\u0435\u0440\u0430, \u043f\u0440\u043e \u044d\u0442\u043e \u043d\u0438\u0436\u0435.<\/p>\n<h2 id=\"s2\">\u0423\u0440\u043e\u0432\u043d\u0438 \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f: \u043e\u0442 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430 \u0434\u043e \u0431\u0430\u0437\u044b \u0434\u0430\u043d\u043d\u044b\u0445<\/h2>\n<p>\u041a\u044d\u0448 \u0435\u0441\u0442\u044c \u043f\u043e\u0447\u0442\u0438 \u043d\u0430 \u043a\u0430\u0436\u0434\u043e\u043c \u0448\u0430\u0433\u0435 \u043f\u0443\u0442\u0438 \u0434\u0430\u043d\u043d\u044b\u0445. \u0427\u0435\u043c \u0431\u043b\u0438\u0436\u0435 \u043a \u043f\u043e\u0442\u0440\u0435\u0431\u0438\u0442\u0435\u043b\u044e, \u0442\u0435\u043c \u0431\u044b\u0441\u0442\u0440\u0435\u0435 \u043e\u0442\u0432\u0435\u0442 \u0438 \u0442\u0435\u043c \u0441\u043b\u043e\u0436\u043d\u0435\u0435 \u0434\u0435\u0440\u0436\u0430\u0442\u044c \u043a\u043e\u043f\u0438\u044e \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0439.<\/p>\n<table>\n<thead>\n<tr>\n<th>\u0423\u0440\u043e\u0432\u0435\u043d\u044c<\/th>\n<th>\u0427\u0442\u043e \u043a\u044d\u0448\u0438\u0440\u0443\u0435\u0442<\/th>\n<th>\u041a\u0442\u043e \u0443\u043f\u0440\u0430\u0432\u043b\u044f\u0435\u0442<\/th>\n<th>\u041a\u0430\u043a \u0441\u0431\u0440\u0430\u0441\u044b\u0432\u0430\u044e\u0442<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u041f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440 (L1\/L2\/L3)<\/td>\n<td>\u0441\u0442\u0440\u043e\u043a\u0438 \u043e\u043f\u0435\u0440\u0430\u0442\u0438\u0432\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438<\/td>\n<td>\u0430\u043f\u043f\u0430\u0440\u0430\u0442\u0443\u0440\u0430, \u043f\u0440\u043e\u0437\u0440\u0430\u0447\u043d\u043e \u0434\u043b\u044f \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c<\/td>\n<td>\u0430\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438, \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u044b \u043a\u043e\u0433\u0435\u0440\u0435\u043d\u0442\u043d\u043e\u0441\u0442\u0438<\/td>\n<\/tr>\n<tr>\n<td>\u0421\u0442\u0440\u0430\u043d\u0438\u0447\u043d\u044b\u0439 \u043a\u044d\u0448 \u041e\u0421<\/td>\n<td>\u0431\u043b\u043e\u043a\u0438 \u0444\u0430\u0439\u043b\u043e\u0432 \u0441 \u0434\u0438\u0441\u043a\u0430<\/td>\n<td>\u044f\u0434\u0440\u043e \u041e\u0421<\/td>\n<td>\u0432\u044b\u0442\u0435\u0441\u043d\u0435\u043d\u0438\u0435 \u043f\u0440\u0438 \u043d\u0435\u0445\u0432\u0430\u0442\u043a\u0435 \u043f\u0430\u043c\u044f\u0442\u0438<\/td>\n<\/tr>\n<tr>\n<td>\u0411\u0440\u0430\u0443\u0437\u0435\u0440<\/td>\n<td>HTML, CSS, JS, \u043a\u0430\u0440\u0442\u0438\u043d\u043a\u0438, \u0448\u0440\u0438\u0444\u0442\u044b<\/td>\n<td>\u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043a\u0438 HTTP \u043e\u0442 \u0441\u0435\u0440\u0432\u0435\u0440\u0430<\/td>\n<td>\u0436\u0435\u0441\u0442\u043a\u0430\u044f \u043f\u0435\u0440\u0435\u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0430, \u043e\u0447\u0438\u0441\u0442\u043a\u0430 \u0434\u0430\u043d\u043d\u044b\u0445 \u0441\u0430\u0439\u0442\u0430<\/td>\n<\/tr>\n<tr>\n<td>CDN \u0438 \u043f\u0440\u043e\u043a\u0441\u0438<\/td>\n<td>\u043e\u0442\u0432\u0435\u0442\u044b \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0446\u0435\u043b\u0438\u043a\u043e\u043c<\/td>\n<td>\u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 CDN + \u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043a\u0438<\/td>\n<td>TTL, \u0441\u0431\u0440\u043e\u0441 (purge) \u0447\u0435\u0440\u0435\u0437 CDN<\/td>\n<\/tr>\n<tr>\n<td>\u041f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435<\/td>\n<td>\u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u0438 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0439<\/td>\n<td>\u043a\u043e\u0434, Redis\/Memcached, \u043f\u0430\u043c\u044f\u0442\u044c \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430<\/td>\n<td>TTL, \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u0435 \u043a\u043b\u044e\u0447\u0430 \u043f\u0440\u0438 \u0437\u0430\u043f\u0438\u0441\u0438<\/td>\n<\/tr>\n<tr>\n<td>\u0411\u0430\u0437\u0430 \u0434\u0430\u043d\u043d\u044b\u0445<\/td>\n<td>\u0441\u0442\u0440\u0430\u043d\u0438\u0446\u044b \u0442\u0430\u0431\u043b\u0438\u0446 \u0438 \u0438\u043d\u0434\u0435\u043a\u0441\u043e\u0432 \u0432 \u043f\u0430\u043c\u044f\u0442\u0438<\/td>\n<td>\u0421\u0423\u0411\u0414 (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, shared_buffers \u0432 PostgreSQL)<\/td>\n<td>\u0432\u044b\u0442\u0435\u0441\u043d\u0435\u043d\u0438\u0435 \u043f\u043e \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0435\u0439 \u043f\u043e\u043b\u0438\u0442\u0438\u043a\u0435<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u041a\u044d\u0448 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430 \u0437\u0434\u0435\u0441\u044c \u0443\u043f\u043e\u043c\u044f\u043d\u0443\u0442 \u0434\u043b\u044f \u043f\u043e\u043b\u043d\u043e\u0442\u044b \u043a\u0430\u0440\u0442\u0438\u043d\u044b: \u043e\u043d \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u0431\u0435\u0437 \u0443\u0447\u0430\u0441\u0442\u0438\u044f \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0441\u0442\u0430, \u0438 \u0435\u0433\u043e \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u043e &#8212; \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u0430\u044f \u0442\u0435\u043c\u0430. \u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0443 \u0447\u0430\u0449\u0435 \u043f\u0440\u0438\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u043d\u0430\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0442\u044c \u0442\u0440\u0438 \u0443\u0440\u043e\u0432\u043d\u044f: \u0431\u0440\u0430\u0443\u0437\u0435\u0440, CDN \u0438 \u043a\u044d\u0448 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f.<\/p>\n<h2 id=\"s3\">\u041a\u044d\u0448 \u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0435 \u0438 HTTP-\u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043a\u0438<\/h2>\n<p>\u0411\u0440\u0430\u0443\u0437\u0435\u0440 \u0440\u0435\u0448\u0430\u0435\u0442, \u043c\u043e\u0436\u043d\u043e \u043b\u0438 \u0432\u0437\u044f\u0442\u044c \u0444\u0430\u0439\u043b \u0438\u0437 \u043a\u044d\u0448\u0430, \u043f\u043e \u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043a\u0430\u043c \u043e\u0442\u0432\u0435\u0442\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0430. \u041e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u0434\u0438\u0440\u0435\u043a\u0442\u0438\u0432\u044b <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Cache-Control<\/code>:<\/p>\n<table>\n<thead>\n<tr>\n<th>\u0414\u0438\u0440\u0435\u043a\u0442\u0438\u0432\u0430<\/th>\n<th>\u0427\u0442\u043e \u043e\u0437\u043d\u0430\u0447\u0430\u0435\u0442<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">max-age=3600<\/code><\/td>\n<td>\u043e\u0442\u0432\u0435\u0442 \u0441\u0432\u0435\u0436\u0438\u0439, \u043f\u043e\u043a\u0430 \u0435\u0433\u043e \u0432\u043e\u0437\u0440\u0430\u0441\u0442 \u043c\u0435\u043d\u044c\u0448\u0435 3600 \u0441\u0435\u043a\u0443\u043d\u0434; \u0432 \u044d\u0442\u043e \u0432\u0440\u0435\u043c\u044f \u043a\u044d\u0448 \u043e\u0442\u0434\u0430\u0435\u0442 \u0435\u0433\u043e, \u043d\u0435 \u0441\u043f\u0440\u0430\u0448\u0438\u0432\u0430\u044f \u0441\u0435\u0440\u0432\u0435\u0440<\/td>\n<\/tr>\n<tr>\n<td><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">no-cache<\/code><\/td>\n<td>\u0445\u0440\u0430\u043d\u0438\u0442\u044c \u043c\u043e\u0436\u043d\u043e, \u043d\u043e \u043f\u0435\u0440\u0435\u0434 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u043d\u0430\u0434\u043e \u0441\u0432\u0435\u0440\u0438\u0442\u044c \u0441 \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u043c<\/td>\n<\/tr>\n<tr>\n<td><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">no-store<\/code><\/td>\n<td>\u043d\u0435 \u0441\u043e\u0445\u0440\u0430\u043d\u044f\u0442\u044c \u043d\u0438 \u0432 \u043a\u0430\u043a\u043e\u043c \u043a\u044d\u0448\u0435 (\u0434\u043b\u044f \u043b\u0438\u0447\u043d\u044b\u0445 \u0438 \u0447\u0443\u0432\u0441\u0442\u0432\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445)<\/td>\n<\/tr>\n<tr>\n<td><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">private<\/code> \/ <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">public<\/code><\/td>\n<td>\u043e\u0431\u0449\u0438\u043c \u043a\u044d\u0448\u0430\u043c (CDN, \u043f\u0440\u043e\u043a\u0441\u0438) \u0445\u0440\u0430\u043d\u0438\u0442\u044c \u0437\u0430\u043f\u0440\u0435\u0449\u0435\u043d\u043e, \u043c\u043e\u0436\u043d\u043e \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0435 \/ \u0440\u0430\u0437\u0440\u0435\u0448\u0430\u0435\u0442 \u0445\u0440\u0430\u043d\u0438\u0442\u044c \u0434\u0430\u0436\u0435 \u0442\u0430\u043c, \u0433\u0434\u0435 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u043d\u0435\u043b\u044c\u0437\u044f (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043e\u0442\u0432\u0435\u0442 \u043d\u0430 \u0437\u0430\u043f\u0440\u043e\u0441 \u0441 \u0430\u0432\u0442\u043e\u0440\u0438\u0437\u0430\u0446\u0438\u0435\u0439)<\/td>\n<\/tr>\n<tr>\n<td><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">s-maxage=600<\/code><\/td>\n<td>\u0441\u0440\u043e\u043a \u0441\u0432\u0435\u0436\u0435\u0441\u0442\u0438 \u0442\u043e\u043b\u044c\u043a\u043e \u0434\u043b\u044f \u043e\u0431\u0449\u0438\u0445 \u043a\u044d\u0448\u0435\u0439: \u043f\u0435\u0440\u0435\u043a\u0440\u044b\u0432\u0430\u0435\u0442 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">max-age<\/code>, \u0431\u0440\u0430\u0443\u0437\u0435\u0440 \u0435\u0433\u043e \u043d\u0435 \u0443\u0447\u0438\u0442\u044b\u0432\u0430\u0435\u0442<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0427\u0430\u0441\u0442\u0430\u044f \u043f\u0443\u0442\u0430\u043d\u0438\u0446\u0430: <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">no-cache<\/code> \u043d\u0435 \u043e\u0437\u043d\u0430\u0447\u0430\u0435\u0442 \u00ab\u043d\u0435 \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u0442\u044c\u00bb. \u0424\u0430\u0439\u043b \u0441\u043e\u0445\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f, \u043d\u043e \u043f\u0440\u0438 \u043a\u0430\u0436\u0434\u043e\u043c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u0431\u0440\u0430\u0443\u0437\u0435\u0440 \u0434\u0435\u043b\u0430\u0435\u0442 \u0443\u0441\u043b\u043e\u0432\u043d\u044b\u0439 \u0437\u0430\u043f\u0440\u043e\u0441 \u0441 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">If-None-Match<\/code> (\u0435\u0441\u043b\u0438 \u0441\u0435\u0440\u0432\u0435\u0440 \u043f\u0440\u0438\u0441\u043b\u0430\u043b <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">ETag<\/code>) \u0438\u043b\u0438 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">If-Modified-Since<\/code> (\u0435\u0441\u043b\u0438 \u0431\u044b\u043b <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Last-Modified<\/code>). \u0415\u0441\u043b\u0438 \u0444\u0430\u0439\u043b \u043d\u0435 \u043c\u0435\u043d\u044f\u043b\u0441\u044f, \u0441\u0435\u0440\u0432\u0435\u0440 \u043e\u0442\u0432\u0435\u0447\u0430\u0435\u0442 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">304 Not Modified<\/code> \u0431\u0435\u0437 \u0442\u0435\u043b\u0430 &#8212; \u0442\u0440\u0430\u0444\u0438\u043a \u044d\u043a\u043e\u043d\u043e\u043c\u0438\u0442\u0441\u044f, \u043d\u043e \u0437\u0430\u043f\u0440\u043e\u0441 \u0432\u0441\u0435 \u0440\u0430\u0432\u043d\u043e \u0438\u0434\u0435\u0442.<\/p>\n<p>\u0414\u043b\u044f \u0441\u0442\u0430\u0442\u0438\u043a\u0438 \u043e\u0431\u044b\u0447\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0442 \u043f\u0440\u0438\u0435\u043c \u0441 \u0432\u0435\u0440\u0441\u0438\u0435\u0439 \u0432 \u0438\u043c\u0435\u043d\u0438 \u0444\u0430\u0439\u043b\u0430: <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">app.3f9c2a.js<\/code> \u043e\u0442\u0434\u0430\u044e\u0442 \u0441 \u0434\u043e\u043b\u0433\u0438\u043c <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">max-age<\/code>, \u0430 \u043f\u0440\u0438 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0438 \u043a\u043e\u0434\u0430 \u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f \u0438\u043c\u044f. \u0422\u0430\u043a \u0434\u043e\u043b\u0433\u0438\u0439 \u043a\u044d\u0448 \u043d\u0435 \u043c\u0435\u0448\u0430\u0435\u0442 \u0432\u044b\u043a\u0430\u0442\u044b\u0432\u0430\u0442\u044c \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f.<\/p>\n<h2 id=\"s4\">\u0421\u0442\u0440\u0430\u0442\u0435\u0433\u0438\u0438 \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0432 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0438<\/h2>\n<p>\u0421\u0442\u0440\u0430\u0442\u0435\u0433\u0438\u044f \u043e\u0442\u0432\u0435\u0447\u0430\u0435\u0442 \u043d\u0430 \u0432\u043e\u043f\u0440\u043e\u0441, \u043a\u0442\u043e \u0438 \u043a\u043e\u0433\u0434\u0430 \u043f\u0438\u0448\u0435\u0442 \u0432 \u043a\u044d\u0448. \u0412\u044b\u0431\u043e\u0440 \u0437\u0430\u0432\u0438\u0441\u0438\u0442 \u043e\u0442 \u0442\u043e\u0433\u043e, \u0447\u0442\u043e \u0432\u0430\u0436\u043d\u0435\u0435: \u0441\u0432\u0435\u0436\u0435\u0441\u0442\u044c \u0434\u0430\u043d\u043d\u044b\u0445, \u0441\u043a\u043e\u0440\u043e\u0441\u0442\u044c \u0437\u0430\u043f\u0438\u0441\u0438 \u0438\u043b\u0438 \u043f\u0440\u043e\u0441\u0442\u043e\u0442\u0430.<\/p>\n<table>\n<thead>\n<tr>\n<th>\u0421\u0442\u0440\u0430\u0442\u0435\u0433\u0438\u044f<\/th>\n<th>\u041a\u0430\u043a \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442<\/th>\n<th>\u041f\u043b\u044e\u0441<\/th>\n<th>\u0420\u0438\u0441\u043a<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Cache-aside (\u043b\u0435\u043d\u0438\u0432\u0430\u044f \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0430)<\/td>\n<td>\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435 \u0447\u0438\u0442\u0430\u0435\u0442 \u043a\u044d\u0448, \u043f\u0440\u0438 \u043f\u0440\u043e\u043c\u0430\u0445\u0435 &#8212; \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a, \u0437\u0430\u0442\u0435\u043c \u043a\u043b\u0430\u0434\u0435\u0442 \u0432 \u043a\u044d\u0448<\/td>\n<td>\u043f\u0440\u043e\u0441\u0442\u043e, \u0432 \u043a\u044d\u0448\u0435 \u0442\u043e\u043b\u044c\u043a\u043e \u043d\u0443\u0436\u043d\u043e\u0435<\/td>\n<td>\u043f\u0435\u0440\u0432\u044b\u0439 \u0437\u0430\u043f\u0440\u043e\u0441 \u043c\u0435\u0434\u043b\u0435\u043d\u043d\u044b\u0439, \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u044b \u0443\u0441\u0442\u0430\u0440\u0435\u0432\u0448\u0438\u0435 \u0434\u0430\u043d\u043d\u044b\u0435<\/td>\n<\/tr>\n<tr>\n<td>Read-through<\/td>\n<td>\u0442\u043e \u0436\u0435, \u043d\u043e \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0443 \u043f\u0440\u0438 \u043f\u0440\u043e\u043c\u0430\u0445\u0435 \u0434\u0435\u043b\u0430\u0435\u0442 \u0441\u0430\u043c \u043a\u044d\u0448-\u0441\u043b\u043e\u0439<\/td>\n<td>\u043a\u043e\u0434 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0449\u0435<\/td>\n<td>\u043d\u0443\u0436\u043d\u0430 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 \u0438\u043b\u0438 \u0441\u0435\u0440\u0432\u0438\u0441 \u0441 \u0442\u0430\u043a\u043e\u0439 \u0444\u0443\u043d\u043a\u0446\u0438\u0435\u0439<\/td>\n<\/tr>\n<tr>\n<td>Write-through<\/td>\n<td>\u0437\u0430\u043f\u0438\u0441\u044c \u0438\u0434\u0435\u0442 \u0432 \u043a\u044d\u0448 \u0438 \u0441\u0440\u0430\u0437\u0443 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e \u0432 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a<\/td>\n<td>\u043a\u044d\u0448 \u0441\u043e\u0433\u043b\u0430\u0441\u043e\u0432\u0430\u043d \u0441 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u043e\u043c \u043f\u043e\u0441\u043b\u0435 \u0437\u0430\u043f\u0438\u0441\u0438<\/td>\n<td>\u0437\u0430\u043f\u0438\u0441\u044c \u043c\u0435\u0434\u043b\u0435\u043d\u043d\u0435\u0435, \u0432 \u043a\u044d\u0448 \u043f\u043e\u043f\u0430\u0434\u0430\u0435\u0442 \u0438 \u0442\u043e, \u0447\u0442\u043e \u043d\u0435 \u0447\u0438\u0442\u0430\u044e\u0442<\/td>\n<\/tr>\n<tr>\n<td>Write-behind (write-back)<\/td>\n<td>\u0437\u0430\u043f\u0438\u0441\u044c \u0432 \u043a\u044d\u0448, \u0432 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a &#8212; \u043f\u043e\u0437\u0436\u0435 \u043f\u0430\u0447\u043a\u043e\u0439<\/td>\n<td>\u0431\u044b\u0441\u0442\u0440\u0430\u044f \u0437\u0430\u043f\u0438\u0441\u044c<\/td>\n<td>\u043f\u0440\u0438 \u0441\u0431\u043e\u0435 \u0434\u043e \u0441\u0431\u0440\u043e\u0441\u0430 \u0434\u0430\u043d\u043d\u044b\u0435 \u0442\u0435\u0440\u044f\u044e\u0442\u0441\u044f<\/td>\n<\/tr>\n<tr>\n<td>Write-around<\/td>\n<td>\u0437\u0430\u043f\u0438\u0441\u044c \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a, \u043a\u044d\u0448 \u0437\u0430\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u0440\u0438 \u0447\u0442\u0435\u043d\u0438\u0438<\/td>\n<td>\u043a\u044d\u0448 \u043d\u0435 \u0437\u0430\u0441\u043e\u0440\u044f\u0435\u0442\u0441\u044f \u0440\u0430\u0437\u043e\u0432\u044b\u043c\u0438 \u0437\u0430\u043f\u0438\u0441\u044f\u043c\u0438<\/td>\n<td>\u043f\u0435\u0440\u0432\u043e\u0435 \u0447\u0442\u0435\u043d\u0438\u0435 \u043f\u043e\u0441\u043b\u0435 \u0437\u0430\u043f\u0438\u0441\u0438 &#8212; \u043f\u0440\u043e\u043c\u0430\u0445<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u041f\u0440\u0438\u043c\u0435\u0440 \u0438\u0437 \u043f\u0435\u0440\u0432\u043e\u0433\u043e \u0440\u0430\u0437\u0434\u0435\u043b\u0430 &#8212; \u044d\u0442\u043e cache-aside, \u0441\u0430\u043c\u0430\u044f \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043d\u0430\u044f \u0441\u0445\u0435\u043c\u0430 \u0434\u043b\u044f \u0432\u0435\u0431-\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439. \u041a\u043e\u0433\u0434\u0430 \u0432\u044b\u0431\u0438\u0440\u0430\u0442\u044c \u0438\u043d\u0430\u0447\u0435: \u0435\u0441\u043b\u0438 \u0434\u0430\u043d\u043d\u044b\u0435 \u043f\u043e\u0441\u043b\u0435 \u0437\u0430\u043f\u0438\u0441\u0438 \u0441\u0440\u0430\u0437\u0443 \u0447\u0438\u0442\u0430\u044e\u0442 \u0438 \u0432\u0430\u0436\u043d\u0430 \u0441\u043e\u0433\u043b\u0430\u0441\u043e\u0432\u0430\u043d\u043d\u043e\u0441\u0442\u044c &#8212; write-through; \u0435\u0441\u043b\u0438 \u043f\u043e\u0442\u043e\u043a \u0437\u0430\u043f\u0438\u0441\u0435\u0439 \u0431\u043e\u043b\u044c\u0448\u043e\u0439, \u0430 \u043f\u043e\u0442\u0435\u0440\u044f \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0438\u0445 \u0441\u0435\u043a\u0443\u043d\u0434 \u0434\u043e\u043f\u0443\u0441\u0442\u0438\u043c\u0430 &#8212; write-behind.<\/p>\n<h2 id=\"s5\">\u0418\u043d\u0432\u0430\u043b\u0438\u0434\u0430\u0446\u0438\u044f: \u0433\u043b\u0430\u0432\u043d\u0430\u044f \u043e\u0448\u0438\u0431\u043a\u0430 \u043f\u0440\u0438 \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0438<\/h2>\n<p><strong>\u0418\u043d\u0432\u0430\u043b\u0438\u0434\u0430\u0446\u0438\u044f<\/strong> &#8212; \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u0435 \u0438\u043b\u0438 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043a\u043e\u043f\u0438\u0438, \u043a\u043e\u0433\u0434\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a \u0438\u0437\u043c\u0435\u043d\u0438\u043b\u0441\u044f. \u0415\u0441\u043b\u0438 \u043f\u0440\u043e \u043d\u0435\u0435 \u0437\u0430\u0431\u044b\u0442\u044c, \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u0432\u0438\u0434\u0438\u0442 \u0441\u0442\u0430\u0440\u0443\u044e \u0446\u0435\u043d\u0443, \u0441\u0442\u0430\u0440\u044b\u0439 \u043f\u0440\u043e\u0444\u0438\u043b\u044c \u0438\u043b\u0438 \u0443\u0434\u0430\u043b\u0435\u043d\u043d\u044b\u0439 \u0442\u043e\u0432\u0430\u0440. \u041d\u0438\u0436\u0435 &#8212; \u043d\u0435\u0432\u0435\u0440\u043d\u044b\u0439 \u0432\u0430\u0440\u0438\u0430\u043d\u0442 \u0438 \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043d\u0430 \u043e\u0434\u043d\u043e\u043c \u0441\u0446\u0435\u043d\u0430\u0440\u0438\u0438:<\/p>\n<pre style=\"background:#282c34;color:#abb2bf;border-radius:8px;padding:16px 20px;margin:20px 0;overflow-x:auto;font-size:14px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\"><code style=\"background:none\"><span style=\"color: #E06C75\">DB<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #ABB2BF\">{<\/span><span style=\"color: #98C379\">\"price:1\"<\/span><span style=\"color: #ABB2BF\">:<\/span> <span style=\"color: #D19A66\">100<\/span><span style=\"color: #ABB2BF\">}<\/span>\n<span style=\"color: #E06C75\">cache<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #ABB2BF\">{}<\/span>\n\n<span style=\"color: #C678DD\">def<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #61AFEF; font-weight: bold\">get<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">):<\/span>\n    <span style=\"color: #C678DD\">if<\/span> <span style=\"color: #E06C75\">key<\/span> <span style=\"color: #56B6C2\">not<\/span> <span style=\"color: #56B6C2\">in<\/span> <span style=\"color: #E06C75\">cache<\/span><span style=\"color: #ABB2BF\">:<\/span>\n        <span style=\"color: #E06C75\">cache<\/span><span style=\"color: #ABB2BF\">[<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">]<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #E06C75\">DB<\/span><span style=\"color: #ABB2BF\">[<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">]<\/span>\n    <span style=\"color: #C678DD\">return<\/span> <span style=\"color: #E06C75\">cache<\/span><span style=\"color: #ABB2BF\">[<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">]<\/span>\n\n<span style=\"color: #C678DD\">def<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #61AFEF; font-weight: bold\">update_wrong<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #E06C75\">value<\/span><span style=\"color: #ABB2BF\">):<\/span>\n    <span style=\"color: #E06C75\">DB<\/span><span style=\"color: #ABB2BF\">[<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">]<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #E06C75\">value<\/span>                     <span style=\"color: #7F848E\"># \u043a\u044d\u0448 \u043d\u0435 \u0442\u0440\u043e\u043d\u0443\u0442<\/span>\n\n<span style=\"color: #C678DD\">def<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #61AFEF; font-weight: bold\">update_right<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #E06C75\">value<\/span><span style=\"color: #ABB2BF\">):<\/span>\n    <span style=\"color: #E06C75\">DB<\/span><span style=\"color: #ABB2BF\">[<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">]<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #E06C75\">value<\/span>\n    <span style=\"color: #E06C75\">cache<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">pop<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #E5C07B\">None<\/span><span style=\"color: #ABB2BF\">)<\/span>                <span style=\"color: #7F848E\"># \u0438\u043d\u0432\u0430\u043b\u0438\u0434\u0430\u0446\u0438\u044f: \u0443\u0434\u0430\u043b\u044f\u0435\u043c \u043a\u043b\u044e\u0447<\/span>\n\n<span style=\"color: #E5C07B\">print<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">get<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"price:1\"<\/span><span style=\"color: #ABB2BF\">))<\/span>                   <span style=\"color: #7F848E\"># 100, \u043a\u044d\u0448 \u0437\u0430\u043f\u043e\u043b\u043d\u0435\u043d<\/span>\n<span style=\"color: #E06C75\">update_wrong<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"price:1\"<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #D19A66\">120<\/span><span style=\"color: #ABB2BF\">)<\/span>\n<span style=\"color: #E5C07B\">print<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">get<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"price:1\"<\/span><span style=\"color: #ABB2BF\">),<\/span> <span style=\"color: #98C379\">\"\u0432 \u0411\u0414:\"<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #E06C75\">DB<\/span><span style=\"color: #ABB2BF\">[<\/span><span style=\"color: #98C379\">\"price:1\"<\/span><span style=\"color: #ABB2BF\">])<\/span>\n<span style=\"color: #E06C75\">update_right<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"price:1\"<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #D19A66\">150<\/span><span style=\"color: #ABB2BF\">)<\/span>\n<span style=\"color: #E5C07B\">print<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">get<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"price:1\"<\/span><span style=\"color: #ABB2BF\">),<\/span> <span style=\"color: #98C379\">\"\u0432 \u0411\u0414:\"<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #E06C75\">DB<\/span><span style=\"color: #ABB2BF\">[<\/span><span style=\"color: #98C379\">\"price:1\"<\/span><span style=\"color: #ABB2BF\">])<\/span><\/code><\/pre>\n<p>\u0420\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u043f\u0440\u043e\u0433\u043e\u043d\u0430 \u043d\u0430 Python 3.14:<\/p>\n<pre style=\"background:#282c34;color:#abb2bf;border-radius:8px;padding:16px 20px;margin:20px 0;overflow-x:auto;font-size:14px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\"><code style=\"background:none\">100\n100 \u0432 \u0411\u0414: 120\n150 \u0432 \u0411\u0414: 150\n<\/code><\/pre>\n<p>\u041f\u043e\u0441\u043b\u0435 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">update_wrong<\/code> \u0431\u0430\u0437\u0430 \u0445\u0440\u0430\u043d\u0438\u0442 120, \u0430 \u043a\u044d\u0448 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0435\u0442 \u043e\u0442\u0434\u0430\u0432\u0430\u0442\u044c 100. \u041f\u043e\u0441\u043b\u0435 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">update_right<\/code> \u043a\u043b\u044e\u0447 \u0443\u0434\u0430\u043b\u0435\u043d, \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u0435 \u0447\u0442\u0435\u043d\u0438\u0435 &#8212; \u043f\u0440\u043e\u043c\u0430\u0445, \u0438 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435 \u0431\u0435\u0440\u0435\u0442 \u0438\u0437 \u0431\u0430\u0437\u044b \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0435 150. \u0423\u0434\u0430\u043b\u0435\u043d\u0438\u0435 \u043a\u043b\u044e\u0447\u0430 \u043e\u0431\u044b\u0447\u043d\u043e \u043d\u0430\u0434\u0435\u0436\u043d\u0435\u0435, \u0447\u0435\u043c \u0437\u0430\u043f\u0438\u0441\u044c \u043d\u043e\u0432\u043e\u0433\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u0432 \u043a\u044d\u0448: \u043f\u0440\u0438 \u0434\u0432\u0443\u0445 \u043f\u0430\u0440\u0430\u043b\u043b\u0435\u043b\u044c\u043d\u044b\u0445 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f\u0445 \u0437\u0430\u043f\u0438\u0441\u044c \u0432 \u043a\u044d\u0448 \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0439\u0442\u0438 \u0432 \u043d\u0435\u0432\u0435\u0440\u043d\u043e\u043c \u043f\u043e\u0440\u044f\u0434\u043a\u0435.<\/p>\n<p>\u0413\u0440\u0430\u043d\u0438\u0446\u0430 \u044d\u0442\u043e\u0433\u043e \u043f\u0440\u0438\u0435\u043c\u0430: \u0432 \u043c\u043d\u043e\u0433\u043e\u043f\u043e\u0442\u043e\u0447\u043d\u043e\u0439 \u0438\u043b\u0438 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u0435 \u043a\u043b\u044e\u0447\u0430 \u043d\u0435 \u0438\u0441\u043a\u043b\u044e\u0447\u0430\u0435\u0442 \u0433\u043e\u043d\u043a\u0443 \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e (\u0447\u0442\u0435\u043d\u0438\u0435 \u0441\u0442\u0430\u0440\u043e\u0433\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u043c\u043e\u0436\u0435\u0442 \u0443\u0441\u043f\u0435\u0442\u044c \u043f\u043e\u043b\u043e\u0436\u0438\u0442\u044c \u0435\u0433\u043e \u043e\u0431\u0440\u0430\u0442\u043d\u043e). \u041f\u043e\u044d\u0442\u043e\u043c\u0443 \u043a \u0438\u043d\u0432\u0430\u043b\u0438\u0434\u0430\u0446\u0438\u0438 \u043f\u043e\u0447\u0442\u0438 \u0432\u0441\u0435\u0433\u0434\u0430 \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u044e\u0442 TTL \u043a\u0430\u043a \u0441\u0442\u0440\u0430\u0445\u043e\u0432\u043a\u0443: \u0434\u0430\u0436\u0435 \u0435\u0441\u043b\u0438 \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u0435 \u043d\u0435 \u0441\u0440\u0430\u0431\u043e\u0442\u0430\u043b\u043e, \u0443\u0441\u0442\u0430\u0440\u0435\u0432\u0448\u0430\u044f \u043a\u043e\u043f\u0438\u044f \u043f\u0440\u043e\u0436\u0438\u0432\u0435\u0442 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u043e\u0435 \u0432\u0440\u0435\u043c\u044f.<\/p>\n<h2 id=\"s6\">TTL \u0438 \u0432\u044b\u0442\u0435\u0441\u043d\u0435\u043d\u0438\u0435: LRU, LFU, FIFO<\/h2>\n<p>TTL \u0438 \u0432\u044b\u0442\u0435\u0441\u043d\u0435\u043d\u0438\u0435 \u0440\u0435\u0448\u0430\u044e\u0442 \u0440\u0430\u0437\u043d\u044b\u0435 \u0437\u0430\u0434\u0430\u0447\u0438:<\/p>\n<ul>\n<li><strong>TTL (time to live)<\/strong> &#8212; \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0432\u0430\u0435\u0442 \u0443\u0441\u0442\u0430\u0440\u0435\u0432\u0430\u043d\u0438\u0435: \u0437\u0430\u043f\u0438\u0441\u044c \u0436\u0438\u0432\u0435\u0442 \u043d\u0435 \u0434\u043e\u043b\u044c\u0448\u0435 \u0437\u0430\u0434\u0430\u043d\u043d\u043e\u0433\u043e \u0432\u0440\u0435\u043c\u0435\u043d\u0438, \u0434\u0430\u0436\u0435 \u0435\u0441\u043b\u0438 \u043c\u0435\u0441\u0442\u0430 \u0445\u0432\u0430\u0442\u0430\u0435\u0442.<\/li>\n<li><strong>\u0412\u044b\u0442\u0435\u0441\u043d\u0435\u043d\u0438\u0435 (eviction)<\/strong> &#8212; \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0432\u0430\u0435\u0442 \u0440\u0430\u0437\u043c\u0435\u0440: \u043a\u043e\u0433\u0434\u0430 \u043f\u0430\u043c\u044f\u0442\u044c \u043a\u043e\u043d\u0447\u0438\u043b\u0430\u0441\u044c, \u043f\u043e\u043b\u0438\u0442\u0438\u043a\u0430 \u0432\u044b\u0431\u0438\u0440\u0430\u0435\u0442, \u0447\u0442\u043e \u0432\u044b\u0431\u0440\u043e\u0441\u0438\u0442\u044c.<\/li>\n<\/ul>\n<p>\u041f\u043e\u043f\u0443\u043b\u044f\u0440\u043d\u044b\u0435 \u043f\u043e\u043b\u0438\u0442\u0438\u043a\u0438 \u0432\u044b\u0442\u0435\u0441\u043d\u0435\u043d\u0438\u044f: <strong>LRU<\/strong> (least recently used) \u0432\u044b\u0431\u0440\u0430\u0441\u044b\u0432\u0430\u0435\u0442 \u0442\u043e, \u043a \u0447\u0435\u043c\u0443 \u0434\u043e\u043b\u044c\u0448\u0435 \u0432\u0441\u0435\u0433\u043e \u043d\u0435 \u043e\u0431\u0440\u0430\u0449\u0430\u043b\u0438\u0441\u044c; <strong>LFU<\/strong> (least frequently used) &#8212; \u0442\u043e, \u043a \u0447\u0435\u043c\u0443 \u043e\u0431\u0440\u0430\u0449\u0430\u043b\u0438\u0441\u044c \u0440\u0435\u0436\u0435 \u0432\u0441\u0435\u0433\u043e; <strong>FIFO<\/strong> &#8212; \u0441\u0430\u043c\u043e\u0435 \u0441\u0442\u0430\u0440\u043e\u0435 \u043f\u043e \u0432\u0440\u0435\u043c\u0435\u043d\u0438 \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0438\u044f. \u041f\u0440\u043e\u0441\u0442\u0430\u044f \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f LRU:<\/p>\n<pre style=\"background:#282c34;color:#abb2bf;border-radius:8px;padding:16px 20px;margin:20px 0;overflow-x:auto;font-size:14px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\"><code style=\"background:none\"><span style=\"color: #C678DD\">from<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E06C75\">collections<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #C678DD\">import<\/span> <span style=\"color: #E06C75\">OrderedDict<\/span>\n\n<span style=\"color: #C678DD\">class<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E5C07B\">LRUCache<\/span><span style=\"color: #ABB2BF\">:<\/span>\n    <span style=\"color: #C678DD\">def<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2; font-weight: bold\">__init__<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E5C07B\">self<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #E06C75\">capacity<\/span><span style=\"color: #ABB2BF\">):<\/span>\n        <span style=\"color: #E5C07B\">self<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">capacity<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #E06C75\">capacity<\/span>\n        <span style=\"color: #E5C07B\">self<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">data<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #E06C75\">OrderedDict<\/span><span style=\"color: #ABB2BF\">()<\/span>\n\n    <span style=\"color: #C678DD\">def<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #61AFEF; font-weight: bold\">get<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E5C07B\">self<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">):<\/span>\n        <span style=\"color: #C678DD\">if<\/span> <span style=\"color: #E06C75\">key<\/span> <span style=\"color: #56B6C2\">not<\/span> <span style=\"color: #56B6C2\">in<\/span> <span style=\"color: #E5C07B\">self<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">data<\/span><span style=\"color: #ABB2BF\">:<\/span>\n            <span style=\"color: #C678DD\">return<\/span> <span style=\"color: #E5C07B\">None<\/span>\n        <span style=\"color: #E5C07B\">self<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">data<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">move_to_end<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">)<\/span>          <span style=\"color: #7F848E\"># \u043e\u0442\u043c\u0435\u0442\u0438\u043b\u0438 \u043a\u0430\u043a \u0441\u0432\u0435\u0436\u0438\u0439<\/span>\n        <span style=\"color: #C678DD\">return<\/span> <span style=\"color: #E5C07B\">self<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">data<\/span><span style=\"color: #ABB2BF\">[<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">]<\/span>\n\n    <span style=\"color: #C678DD\">def<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #61AFEF; font-weight: bold\">put<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E5C07B\">self<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #E06C75\">value<\/span><span style=\"color: #ABB2BF\">):<\/span>\n        <span style=\"color: #E5C07B\">self<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">data<\/span><span style=\"color: #ABB2BF\">[<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">]<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #E06C75\">value<\/span>\n        <span style=\"color: #E5C07B\">self<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">data<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">move_to_end<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">key<\/span><span style=\"color: #ABB2BF\">)<\/span>\n        <span style=\"color: #C678DD\">if<\/span> <span style=\"color: #E5C07B\">len<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E5C07B\">self<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">data<\/span><span style=\"color: #ABB2BF\">)<\/span> <span style=\"color: #56B6C2\">&gt;<\/span> <span style=\"color: #E5C07B\">self<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">capacity<\/span><span style=\"color: #ABB2BF\">:<\/span>\n            <span style=\"color: #E06C75\">old<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #E06C75\">_<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #E5C07B\">self<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">data<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">popitem<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">last<\/span><span style=\"color: #56B6C2\">=<\/span><span style=\"color: #E5C07B\">False<\/span><span style=\"color: #ABB2BF\">)<\/span>   <span style=\"color: #7F848E\"># \u0441\u0430\u043c\u044b\u0439 \u0434\u0430\u0432\u043d\u0438\u0439<\/span>\n            <span style=\"color: #E5C07B\">print<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"\u0432\u044b\u0442\u0435\u0441\u043d\u0435\u043d:\"<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #E06C75\">old<\/span><span style=\"color: #ABB2BF\">)<\/span>\n\n<span style=\"color: #E06C75\">c<\/span> <span style=\"color: #56B6C2\">=<\/span> <span style=\"color: #E06C75\">LRUCache<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #D19A66\">2<\/span><span style=\"color: #ABB2BF\">)<\/span>\n<span style=\"color: #E06C75\">c<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">put<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"a\"<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #D19A66\">1<\/span><span style=\"color: #ABB2BF\">)<\/span>\n<span style=\"color: #E06C75\">c<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">put<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"b\"<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #D19A66\">2<\/span><span style=\"color: #ABB2BF\">)<\/span>\n<span style=\"color: #E06C75\">c<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">get<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"a\"<\/span><span style=\"color: #ABB2BF\">)<\/span>          <span style=\"color: #7F848E\"># a \u0441\u0442\u0430\u043b \u0441\u0432\u0435\u0436\u0435\u0435 b<\/span>\n<span style=\"color: #E06C75\">c<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">put<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"c\"<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #D19A66\">3<\/span><span style=\"color: #ABB2BF\">)<\/span>       <span style=\"color: #7F848E\"># \u043c\u0435\u0441\u0442\u0430 \u043d\u0435\u0442 -&gt; \u0443\u0445\u043e\u0434\u0438\u0442 b<\/span>\n<span style=\"color: #E5C07B\">print<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E5C07B\">list<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">c<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">data<\/span><span style=\"color: #ABB2BF\">))<\/span><\/code><\/pre>\n<p>\u0412\u044b\u0432\u043e\u0434:<\/p>\n<pre style=\"background:#282c34;color:#abb2bf;border-radius:8px;padding:16px 20px;margin:20px 0;overflow-x:auto;font-size:14px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\"><code style=\"background:none\">\u0432\u044b\u0442\u0435\u0441\u043d\u0435\u043d: b\n[&#x27;a&#x27;, &#x27;c&#x27;]\n<\/code><\/pre>\n<p>\u041a\u043b\u044e\u0447 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">b<\/code> \u0434\u043e\u0431\u0430\u0432\u0438\u043b\u0438 \u043f\u043e\u0437\u0436\u0435 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">a<\/code>, \u043d\u043e \u0432\u044b\u0442\u0435\u0441\u043d\u0435\u043d \u0438\u043c\u0435\u043d\u043d\u043e \u043e\u043d: \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0435 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">get(\"a\")<\/code> \u0441\u0434\u0435\u043b\u0430\u043b\u043e <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">a<\/code> \u043d\u0435\u0434\u0430\u0432\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u043c. \u0412 \u044d\u0442\u043e\u043c \u0438 \u043e\u0442\u043b\u0438\u0447\u0438\u0435 LRU \u043e\u0442 FIFO, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0432\u044b\u0431\u0440\u043e\u0441\u0438\u043b \u0431\u044b <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">a<\/code>.<\/p>\n<p>\u0412 Python \u0434\u043b\u044f \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u043e\u0432 \u0444\u0443\u043d\u043a\u0446\u0438\u0439 \u0435\u0441\u0442\u044c \u0433\u043e\u0442\u043e\u0432\u044b\u0439 \u0434\u0435\u043a\u043e\u0440\u0430\u0442\u043e\u0440 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">functools.lru_cache<\/code>:<\/p>\n<pre style=\"background:#282c34;color:#abb2bf;border-radius:8px;padding:16px 20px;margin:20px 0;overflow-x:auto;font-size:14px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\"><code style=\"background:none\"><span style=\"color: #C678DD\">from<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E06C75\">functools<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #C678DD\">import<\/span> <span style=\"color: #E06C75\">lru_cache<\/span>\n\n<span style=\"color: #61AFEF\">@lru_cache<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">maxsize<\/span><span style=\"color: #56B6C2\">=<\/span><span style=\"color: #D19A66\">128<\/span><span style=\"color: #ABB2BF\">)<\/span>\n<span style=\"color: #C678DD\">def<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #61AFEF; font-weight: bold\">square<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">n<\/span><span style=\"color: #ABB2BF\">):<\/span>\n    <span style=\"color: #E5C07B\">print<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"\u0441\u0447\u0438\u0442\u0430\u044e\"<\/span><span style=\"color: #ABB2BF\">,<\/span> <span style=\"color: #E06C75\">n<\/span><span style=\"color: #ABB2BF\">)<\/span>\n    <span style=\"color: #C678DD\">return<\/span> <span style=\"color: #E06C75\">n<\/span> <span style=\"color: #56B6C2\">*<\/span> <span style=\"color: #E06C75\">n<\/span>\n\n<span style=\"color: #E06C75\">square<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #D19A66\">4<\/span><span style=\"color: #ABB2BF\">);<\/span> <span style=\"color: #E06C75\">square<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #D19A66\">4<\/span><span style=\"color: #ABB2BF\">);<\/span> <span style=\"color: #E06C75\">square<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #D19A66\">5<\/span><span style=\"color: #ABB2BF\">)<\/span>\n<span style=\"color: #E5C07B\">print<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">square<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">cache_info<\/span><span style=\"color: #ABB2BF\">())<\/span>\n<span style=\"color: #E06C75\">square<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">cache_clear<\/span><span style=\"color: #ABB2BF\">()<\/span>\n<span style=\"color: #E5C07B\">print<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">square<\/span><span style=\"color: #56B6C2\">.<\/span><span style=\"color: #E06C75\">cache_info<\/span><span style=\"color: #ABB2BF\">())<\/span><\/code><\/pre>\n<pre style=\"background:#282c34;color:#abb2bf;border-radius:8px;padding:16px 20px;margin:20px 0;overflow-x:auto;font-size:14px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\"><code style=\"background:none\">\u0441\u0447\u0438\u0442\u0430\u044e 4\n\u0441\u0447\u0438\u0442\u0430\u044e 5\nCacheInfo(hits=1, misses=2, maxsize=128, currsize=2)\nCacheInfo(hits=0, misses=0, maxsize=128, currsize=0)\n<\/code><\/pre>\n<p>\u0412\u0442\u043e\u0440\u043e\u0439 \u0432\u044b\u0437\u043e\u0432 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">square(4)<\/code> \u043d\u0435 \u043f\u0435\u0447\u0430\u0442\u0430\u0435\u0442 \u00ab\u0441\u0447\u0438\u0442\u0430\u044e\u00bb &#8212; \u044d\u0442\u043e \u043f\u043e\u043f\u0430\u0434\u0430\u043d\u0438\u0435. \u0423\u0441\u043b\u043e\u0432\u0438\u0435 \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e\u0441\u0442\u0438: \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 \u0434\u043e\u043b\u0436\u0435\u043d \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u0442\u044c\u0441\u044f \u0430\u0440\u0433\u0443\u043c\u0435\u043d\u0442\u0430\u043c\u0438, \u0430 \u0430\u0440\u0433\u0443\u043c\u0435\u043d\u0442\u044b \u0434\u043e\u043b\u0436\u043d\u044b \u0431\u044b\u0442\u044c \u0445\u0435\u0448\u0438\u0440\u0443\u0435\u043c\u044b\u043c\u0438 (\u0441\u043f\u0438\u0441\u043e\u043a \u0432\u044b\u0437\u043e\u0432\u0435\u0442 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">TypeError<\/code>). TTL \u0443 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">lru_cache<\/code> \u043d\u0435\u0442, \u043f\u043e\u044d\u0442\u043e\u043c\u0443 \u0434\u043b\u044f \u0434\u0430\u043d\u043d\u044b\u0445 \u0438\u0437 \u0431\u0430\u0437\u044b \u043e\u043d \u043d\u0435 \u043f\u043e\u0434\u0445\u043e\u0434\u0438\u0442 \u0431\u0435\u0437 \u0434\u043e\u0440\u0430\u0431\u043e\u0442\u043a\u0438.<\/p>\n<h2 id=\"s7\">\u041a\u043e\u0433\u0434\u0430 \u043a\u044d\u0448 \u0432\u0440\u0435\u0434\u0438\u0442 \u0438 \u043a\u0430\u043a \u043f\u043e\u0447\u0438\u0441\u0442\u0438\u0442\u044c \u043a\u044d\u0448 \u0432\u0440\u0443\u0447\u043d\u0443\u044e<\/h2>\n<p>\u041a\u044d\u0448 \u043d\u0435 \u0431\u0435\u0441\u043f\u043b\u0430\u0442\u0435\u043d. \u0422\u0438\u043f\u043e\u0432\u044b\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b: \u0443\u0441\u0442\u0430\u0440\u0435\u0432\u0448\u0438\u0435 \u0434\u0430\u043d\u043d\u044b\u0435 \u0431\u0435\u0437 \u0438\u043d\u0432\u0430\u043b\u0438\u0434\u0430\u0446\u0438\u0438; \u0443\u0442\u0435\u0447\u043a\u0430 \u043f\u0440\u0438\u0432\u0430\u0442\u043d\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445, \u0435\u0441\u043b\u0438 \u043b\u0438\u0447\u043d\u044b\u0439 \u043e\u0442\u0432\u0435\u0442 \u043f\u043e\u043f\u0430\u043b \u0432 \u043e\u0431\u0449\u0438\u0439 \u043a\u044d\u0448 CDN (\u0434\u043b\u044f \u0442\u0430\u043a\u0438\u0445 \u043e\u0442\u0432\u0435\u0442\u043e\u0432 &#8212; <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">private<\/code> \u0438\u043b\u0438 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">no-store<\/code>); <strong>\u043b\u0430\u0432\u0438\u043d\u0430 \u043f\u0440\u043e\u043c\u0430\u0445\u043e\u0432<\/strong> (cache stampede), \u043a\u043e\u0433\u0434\u0430 \u0443 \u043f\u043e\u043f\u0443\u043b\u044f\u0440\u043d\u043e\u0433\u043e \u043a\u043b\u044e\u0447\u0430 \u0438\u0441\u0442\u0435\u043a TTL \u0438 \u0441\u043e\u0442\u043d\u0438 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u043e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e \u0438\u0434\u0443\u0442 \u0432 \u0431\u0430\u0437\u0443. \u041e\u0442 \u043b\u0430\u0432\u0438\u043d\u044b \u043f\u043e\u043c\u043e\u0433\u0430\u044e\u0442 \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u043a\u0430 \u043d\u0430 \u043f\u0435\u0440\u0435\u0441\u0447\u0435\u0442 \u043a\u043b\u044e\u0447\u0430, \u0441\u043b\u0443\u0447\u0430\u0439\u043d\u044b\u0439 \u0440\u0430\u0437\u0431\u0440\u043e\u0441 TTL \u0438 \u043e\u0442\u0434\u0430\u0447\u0430 \u0443\u0441\u0442\u0430\u0440\u0435\u0432\u0448\u0435\u0439 \u043a\u043e\u043f\u0438\u0438 \u043d\u0430 \u0432\u0440\u0435\u043c\u044f \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f.<\/p>\n<p>\u0415\u0441\u043b\u0438 \u0441\u0430\u0439\u0442 \u043f\u043e\u0441\u043b\u0435 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u043e\u0442\u043e\u0431\u0440\u0430\u0436\u0430\u0435\u0442\u0441\u044f \u043a\u0440\u0438\u0432\u043e, \u043e\u0431\u044b\u0447\u043d\u043e \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u0436\u0435\u0441\u0442\u043a\u043e\u0439 \u043f\u0435\u0440\u0435\u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u0441\u0442\u0440\u0430\u043d\u0438\u0446\u044b: <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Ctrl+F5<\/code> \u0438\u043b\u0438 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Ctrl+Shift+R<\/code> \u0432 Windows \u0438 Linux, <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Cmd+Shift+R<\/code> \u0432 macOS. \u041f\u043e\u043b\u043d\u0430\u044f \u043e\u0447\u0438\u0441\u0442\u043a\u0430 \u0432 Chrome \u043e\u0442\u043a\u0440\u044b\u0432\u0430\u0435\u0442\u0441\u044f \u0441\u043e\u0447\u0435\u0442\u0430\u043d\u0438\u0435\u043c <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Ctrl+Shift+Delete<\/code> (\u0432 macOS &#8212; <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Cmd+Shift+Delete<\/code>) \u0438\u043b\u0438 \u0447\u0435\u0440\u0435\u0437 \u043c\u0435\u043d\u044e \u00ab\u0423\u0434\u0430\u043b\u0438\u0442\u044c \u0434\u0430\u043d\u043d\u044b\u0435 \u043e \u0440\u0430\u0431\u043e\u0442\u0435 \u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0435\u00bb: \u0442\u0430\u043c \u043e\u0442\u043c\u0435\u0447\u0430\u044e\u0442 \u00ab\u0418\u0437\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u044f \u0438 \u0434\u0440\u0443\u0433\u0438\u0435 \u0444\u0430\u0439\u043b\u044b, \u0441\u043e\u0445\u0440\u0430\u043d\u0435\u043d\u043d\u044b\u0435 \u0432 \u043a\u0435\u0448\u0435\u00bb \u0438 \u0432\u044b\u0431\u0438\u0440\u0430\u044e\u0442 \u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440 \u00ab\u0412\u0441\u0435 \u0432\u0440\u0435\u043c\u044f\u00bb. \u041d\u0430 Android \u043a\u044d\u0448 \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f \u0447\u0438\u0441\u0442\u044f\u0442 \u0432 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0430\u0445: \u00ab\u041f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f\u00bb -&gt; \u043d\u0443\u0436\u043d\u043e\u0435 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435 -&gt; \u00ab\u0425\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 \u0438 \u043a\u0435\u0448\u00bb -&gt; \u00ab\u041e\u0447\u0438\u0441\u0442\u0438\u0442\u044c \u043a\u0435\u0448\u00bb (\u0442\u0430\u043a \u0432 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u043e\u043c Android; \u0432 \u043e\u0431\u043e\u043b\u043e\u0447\u043a\u0430\u0445 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u0439 \u043f\u0443\u043d\u043a\u0442 \u043c\u043e\u0436\u0435\u0442 \u043d\u0430\u0437\u044b\u0432\u0430\u0442\u044c\u0441\u044f \u00ab\u041f\u0430\u043c\u044f\u0442\u044c\u00bb \u0438\u043b\u0438 \u00ab\u0425\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435\u00bb). \u041d\u0435 \u043f\u0443\u0442\u0430\u0439\u0442\u0435 \u0441 \u043a\u043d\u043e\u043f\u043a\u043e\u0439 \u00ab\u041e\u0447\u0438\u0441\u0442\u0438\u0442\u044c \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435\u00bb (\u00ab\u0423\u0434\u0430\u043b\u0438\u0442\u044c \u0434\u0430\u043d\u043d\u044b\u0435\u00bb): \u043e\u043d\u0430 \u0441\u0442\u0438\u0440\u0430\u0435\u0442 \u0432\u0441\u0435 \u0434\u0430\u043d\u043d\u044b\u0435 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f, \u0432\u043a\u043b\u044e\u0447\u0430\u044f \u0432\u0445\u043e\u0434 \u0432 \u0430\u043a\u043a\u0430\u0443\u043d\u0442. \u0412 Windows 11 \u0432\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0435 \u0444\u0430\u0439\u043b\u044b \u0443\u0434\u0430\u043b\u044f\u044e\u0442\u0441\u044f \u0447\u0435\u0440\u0435\u0437 \u00ab\u041f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u044b\u00bb -&gt; \u00ab\u0421\u0438\u0441\u0442\u0435\u043c\u0430\u00bb -&gt; \u00ab\u041f\u0430\u043c\u044f\u0442\u044c\u00bb (\u0432 \u0441\u043f\u0440\u0430\u0432\u043a\u0435 Microsoft \u0440\u0430\u0437\u0434\u0435\u043b \u043d\u0430\u0437\u0432\u0430\u043d \u00ab\u0425\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435\u00bb) -&gt; \u00ab\u0412\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0435 \u0444\u0430\u0439\u043b\u044b\u00bb.<\/p>\n<p>\u041e\u0447\u0438\u0441\u0442\u043a\u0430 \u043a\u044d\u0448\u0430 \u043d\u0435 \u0443\u0434\u0430\u043b\u044f\u0435\u0442 \u043f\u0430\u0440\u043e\u043b\u0438 \u0438 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438, \u0435\u0441\u043b\u0438 \u043d\u0435 \u0432\u044b\u0431\u0440\u0430\u0442\u044c \u0438\u0445 \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u043e, \u043d\u043e \u043f\u043e\u0441\u043b\u0435 \u043d\u0435\u0435 \u0441\u0430\u0439\u0442\u044b \u0438 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f \u043f\u0435\u0440\u0432\u043e\u0435 \u0432\u0440\u0435\u043c\u044f \u043e\u0442\u043a\u0440\u044b\u0432\u0430\u044e\u0442\u0441\u044f \u043c\u0435\u0434\u043b\u0435\u043d\u043d\u0435\u0435: \u043a\u044d\u0448 \u0437\u0430\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f \u0437\u0430\u043d\u043e\u0432\u043e.<\/p>\n<h2 id=\"s8\">\u0412\u044b\u0432\u043e\u0434\u044b<\/h2>\n<ul>\n<li>\u041a\u044d\u0448 &#8212; \u043a\u043e\u043f\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445 \u0440\u044f\u0434\u043e\u043c \u0441 \u043f\u043e\u0442\u0440\u0435\u0431\u0438\u0442\u0435\u043b\u0435\u043c; \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a \u0438\u0441\u0442\u0438\u043d\u044b \u043e\u0441\u0442\u0430\u0435\u0442\u0441\u044f \u0432 \u0431\u0430\u0437\u0435 \u0438\u043b\u0438 \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435, \u0430 \u043a\u043e\u043f\u0438\u044f \u043c\u043e\u0436\u0435\u0442 \u0443\u0441\u0442\u0430\u0440\u0435\u0442\u044c.<\/li>\n<li>\u041a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u043d\u0430 \u0432\u0441\u0435\u0445 \u0443\u0440\u043e\u0432\u043d\u044f\u0445: \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440, \u041e\u0421, \u0431\u0440\u0430\u0443\u0437\u0435\u0440, CDN, \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435, \u0421\u0423\u0411\u0414; \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a \u0447\u0430\u0449\u0435 \u0432\u0441\u0435\u0433\u043e \u043d\u0430\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0435\u0442 HTTP-\u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043a\u0438, CDN \u0438 \u043a\u044d\u0448 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f.<\/li>\n<li>\u0421\u0442\u0440\u0430\u0442\u0435\u0433\u0438\u044e \u0432\u044b\u0431\u0438\u0440\u0430\u044e\u0442 \u043f\u043e \u043f\u0440\u0438\u043e\u0440\u0438\u0442\u0435\u0442\u0443: cache-aside &#8212; \u043f\u0440\u043e\u0441\u0442\u043e \u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043e, write-through &#8212; \u0441\u043e\u0433\u043b\u0430\u0441\u043e\u0432\u0430\u043d\u043d\u043e\u0441\u0442\u044c \u043f\u043e\u0441\u043b\u0435 \u0437\u0430\u043f\u0438\u0441\u0438, write-behind &#8212; \u0441\u043a\u043e\u0440\u043e\u0441\u0442\u044c \u0437\u0430\u043f\u0438\u0441\u0438 \u0446\u0435\u043d\u043e\u0439 \u0440\u0438\u0441\u043a\u0430 \u043f\u043e\u0442\u0435\u0440\u0438.<\/li>\n<li>TTL \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0432\u0430\u0435\u0442 \u0443\u0441\u0442\u0430\u0440\u0435\u0432\u0430\u043d\u0438\u0435, \u043f\u043e\u043b\u0438\u0442\u0438\u043a\u0430 \u0432\u044b\u0442\u0435\u0441\u043d\u0435\u043d\u0438\u044f (LRU, LFU, FIFO) &#8212; \u0440\u0430\u0437\u043c\u0435\u0440; \u044d\u0442\u043e \u0440\u0430\u0437\u043d\u044b\u0435 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u044b, \u0438 \u043e\u0431\u044b\u0447\u043d\u043e \u043d\u0443\u0436\u043d\u044b \u043e\u0431\u0430.<\/li>\n<li>\u0413\u043b\u0430\u0432\u043d\u0430\u044f \u043e\u0448\u0438\u0431\u043a\u0430 &#8212; \u0437\u0430\u0431\u044b\u0442\u0430\u044f \u0438\u043d\u0432\u0430\u043b\u0438\u0434\u0430\u0446\u0438\u044f: \u043f\u0440\u0438 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u043a\u043b\u044e\u0447 \u0443\u0434\u0430\u043b\u044f\u044e\u0442, \u0430 TTL \u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0442 \u043a\u0430\u043a \u0441\u0442\u0440\u0430\u0445\u043e\u0432\u043a\u0443.<\/li>\n<\/ul>\n<h2 id=\"s9\">\u0413\u0434\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f \/ \u0441\u0432\u044f\u0437\u044c \u0441 \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u043e\u0439<\/h2>\n<div class=\"oj-cta\" style=\"background:#fbf4e4;border-left:4px solid #c9962b;border-radius:8px;padding:16px 20px;margin:24px 0\">\n<p style=\"margin:0 0 8px\"><strong>\u041e\u0441\u0432\u043e\u0439\u0442\u0435 \u0442\u0435\u043c\u0443 \u043d\u0430 \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u0435<\/strong><\/p>\n<p>\u041a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 &#8212; \u043e\u0434\u043d\u0430 \u0438\u0437 \u043f\u0435\u0440\u0432\u044b\u0445 \u0442\u0435\u043c \u043d\u0430 \u0441\u043e\u0431\u0435\u0441\u0435\u0434\u043e\u0432\u0430\u043d\u0438\u044f\u0445 \u043f\u043e \u043f\u0440\u043e\u0435\u043a\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044e \u0441\u0438\u0441\u0442\u0435\u043c: \u043a\u0430\u043a \u0440\u0430\u0437\u0433\u0440\u0443\u0437\u0438\u0442\u044c \u0431\u0430\u0437\u0443, \u0433\u0434\u0435 \u043f\u043e\u0441\u0442\u0430\u0432\u0438\u0442\u044c Redis, \u043a\u0430\u043a \u043d\u0435 \u043e\u0442\u0434\u0430\u0442\u044c \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u0447\u0443\u0436\u0438\u0435 \u0438\u043b\u0438 \u0443\u0441\u0442\u0430\u0440\u0435\u0432\u0448\u0438\u0435 \u0434\u0430\u043d\u043d\u044b\u0435, \u0447\u0442\u043e \u0434\u0435\u043b\u0430\u0442\u044c \u043f\u0440\u0438 \u043b\u0430\u0432\u0438\u043d\u0435 \u043f\u0440\u043e\u043c\u0430\u0445\u043e\u0432. \u042d\u0442\u0438 \u0440\u0435\u0448\u0435\u043d\u0438\u044f \u0440\u0430\u0437\u0431\u0438\u0440\u0430\u044e\u0442 \u0432\u043c\u0435\u0441\u0442\u0435 \u0441 \u0431\u0430\u043b\u0430\u043d\u0441\u0438\u0440\u043e\u0432\u043a\u043e\u0439, \u0440\u0435\u043f\u043b\u0438\u043a\u0430\u0446\u0438\u0435\u0439 \u0438 \u043e\u0447\u0435\u0440\u0435\u0434\u044f\u043c\u0438 \u043d\u0430 \u043a\u0443\u0440\u0441\u0435 <a href=\"https:\/\/otus.ru\/lessons\/system-design\/?int_article=vse-o-keshirovanii-i-keshah&amp;int_place=article&amp;int_variant=v1\">\u00abSystem Design\u00bb<\/a>.<\/p>\n<\/div>\n<div class=\"oj-cta\" style=\"background:#fbf4e4;border-left:4px solid #c9962b;border-radius:8px;padding:16px 20px;margin:24px 0\">\n<p style=\"margin:0 0 8px\"><strong>\u041e\u0441\u0432\u043e\u0439\u0442\u0435 \u0442\u0435\u043c\u0443 \u043d\u0430 \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u0435<\/strong><\/p>\n<p>\u041f\u043e\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c \u0444\u043e\u0440\u043c\u0430\u0442 \u043e\u0431\u0443\u0447\u0435\u043d\u0438\u044f \u0438 \u0440\u0430\u0437\u043e\u0431\u0440\u0430\u0442\u044c \u043f\u0440\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u043a\u0435\u0439\u0441\u044b \u0441 \u043f\u0440\u0435\u043f\u043e\u0434\u0430\u0432\u0430\u0442\u0435\u043b\u044f\u043c\u0438 \u043c\u043e\u0436\u043d\u043e \u043d\u0430 <a href=\"https:\/\/otus.ru\/events\/?int_article=vse-o-keshirovanii-i-keshah&amp;int_place=article&amp;int_variant=v1\">\u0431\u0435\u0441\u043f\u043b\u0430\u0442\u043d\u044b\u0445 \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u0445 \u0443\u0440\u043e\u043a\u0430\u0445<\/a>.<\/p>\n<\/div>\n<h2 id=\"s10\">FAQ<\/h2>\n<p><strong>\u041a\u044d\u0448 \u0438 \u0431\u0443\u0444\u0435\u0440 &#8212; \u044d\u0442\u043e \u043e\u0434\u043d\u043e \u0438 \u0442\u043e \u0436\u0435?<\/strong><br \/>\n\u041d\u0435\u0442. \u0411\u0443\u0444\u0435\u0440 \u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e \u0434\u0435\u0440\u0436\u0438\u0442 \u0434\u0430\u043d\u043d\u044b\u0435 \u043f\u0440\u0438 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0435 \u043c\u0435\u0436\u0434\u0443 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430\u043c\u0438 \u0441 \u0440\u0430\u0437\u043d\u043e\u0439 \u0441\u043a\u043e\u0440\u043e\u0441\u0442\u044c\u044e \u0438 \u043f\u043e\u0441\u043b\u0435 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0438 \u043d\u0435 \u043d\u0443\u0436\u0435\u043d, \u0430 \u043a\u044d\u0448 \u0445\u0440\u0430\u043d\u0438\u0442 \u043a\u043e\u043f\u0438\u044e, \u0447\u0442\u043e\u0431\u044b \u043f\u043e\u0432\u0442\u043e\u0440\u043d\u043e \u043e\u0442\u0434\u0430\u0442\u044c \u0435\u0435 \u0431\u0435\u0437 \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u044f \u043a \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0443.<\/p>\n<p><strong>\u041f\u043e\u0447\u0435\u043c\u0443 \u043a\u044d\u0448 \u043d\u0430\u0437\u044b\u0432\u0430\u044e\u0442 \u00ab\u043a\u0435\u0448\u00bb \u0438 \u00ab\u043a\u044d\u0448\u00bb?<\/strong><br \/>\n\u041e\u0431\u0430 \u043d\u0430\u043f\u0438\u0441\u0430\u043d\u0438\u044f \u0432\u0441\u0442\u0440\u0435\u0447\u0430\u044e\u0442\u0441\u044f \u0438 \u0432 \u0441\u043b\u043e\u0432\u0430\u0440\u044f\u0445, \u0438 \u0432 \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0430\u0446\u0438\u0438: \u0432 IT-\u0442\u0435\u043a\u0441\u0442\u0430\u0445 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043e \u00ab\u043a\u044d\u0448\u00bb, \u0430 \u0432 \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441\u0430\u0445 Google Chrome \u0438 Android \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u00ab\u043a\u0435\u0448\u00bb. \u0421\u043b\u043e\u0432\u043e \u043f\u0440\u043e\u0438\u0441\u0445\u043e\u0434\u0438\u0442 \u043e\u0442 \u0430\u043d\u0433\u043b\u0438\u0439\u0441\u043a\u043e\u0433\u043e cache, \u0442\u043e \u0435\u0441\u0442\u044c \u00ab\u0442\u0430\u0439\u043d\u0438\u043a\u00bb.<\/p>\n<p><strong>\u041c\u043e\u0436\u043d\u043e \u043b\u0438 \u0445\u0440\u0430\u043d\u0438\u0442\u044c \u0432 \u043a\u044d\u0448\u0435 \u043f\u0430\u0440\u043e\u043b\u0438 \u0438 \u0442\u043e\u043a\u0435\u043d\u044b?<\/strong><br \/>\n\u041b\u0443\u0447\u0448\u0435 \u043d\u0435\u0442: \u043e\u0442\u0432\u0435\u0442\u044b \u0441 \u043b\u0438\u0447\u043d\u044b\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u043c\u0438 \u043e\u0442\u0434\u0430\u044e\u0442 \u0441 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Cache-Control: no-store<\/code>, \u0430 \u0432 \u043a\u044d\u0448\u0435 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f \u0445\u0440\u0430\u043d\u044f\u0442 \u0442\u043e\u043b\u044c\u043a\u043e \u0442\u043e, \u0447\u0442\u043e \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e \u043f\u043e\u0442\u0435\u0440\u044f\u0442\u044c \u0438\u043b\u0438 \u0440\u0430\u0441\u043a\u0440\u044b\u0442\u044c \u043f\u0440\u0438 \u043e\u0448\u0438\u0431\u043a\u0435 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u041a\u044d\u0448 (\u0438\u043b\u0438 \u043a\u0435\u0448) &#8212; \u044d\u0442\u043e \u0431\u044b\u0441\u0442\u0440\u043e\u0435 \u043f\u0440\u043e\u043c\u0435\u0436\u0443\u0442\u043e\u0447\u043d\u043e\u0435 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435, \u0433\u0434\u0435 \u043b\u0435\u0436\u0438\u0442 \u043a\u043e\u043f\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0441\u043a\u043e\u0440\u0435\u0435 \u0432\u0441\u0435\u0433\u043e \u043f\u043e\u043d\u0430\u0434\u043e\u0431\u044f\u0442\u0441\u044f \u0441\u043d\u043e\u0432\u0430. \u041a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 &#8212; \u043f\u0440\u0438\u0435\u043c, \u043f\u0440\u0438 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u0434\u043e\u0440\u043e\u0433\u043e\u0439 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 (\u0447\u0442\u0435\u043d\u0438\u044f \u0441 \u0434\u0438\u0441\u043a\u0430, \u0437\u0430\u043f\u0440\u043e\u0441\u0430 \u043a \u0431\u0430\u0437\u0435, \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u043f\u043e \u0441\u0435\u0442\u0438) \u0441\u043e\u0445\u0440\u0430\u043d\u044f\u044e\u0442 \u0431\u043b\u0438\u0436\u0435 \u043a \u043c\u0435\u0441\u0442\u0443 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0438 \u043f\u0440\u0438 \u043f\u043e\u0432\u0442\u043e\u0440\u043d\u043e\u043c \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0438 \u0431\u0435\u0440\u0443\u0442 \u043a\u043e\u043f\u0438\u044e, \u0430 \u043d\u0435 \u0438\u0434\u0443\u0442 \u0432 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a. \u0421\u043e\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u0435 \u041a\u0430\u043a \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u043a\u044d\u0448: \u043f\u043e\u043f\u0430\u0434\u0430\u043d\u0438\u0435 [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":9729,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[353,65],"class_list":["post-9728","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-polza","tag-kesh","tag-programmirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0427\u0442\u043e \u0442\u0430\u043a\u043e\u0435 \u043a\u044d\u0448 \u0438 \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435: \u0443\u0440\u043e\u0432\u043d\u0438 \u043e\u0442 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430 \u0434\u043e CDN \u0438 \u0431\u0430\u0437\u044b, \u0441\u0442\u0440\u0430\u0442\u0435\u0433\u0438\u0438 cache-aside \u0438 write-through, TTL, LRU \u0438 \u0438\u043d\u0432\u0430\u043b\u0438\u0434\u0430\u0446\u0438\u044f \u0441 \u043f\u0440\u0438\u043c\u0435\u0440\u0430\u043c\u0438 \u043d\u0430 Python.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"A. Pavlenko\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/otus.ru\/journal\/vse-o-keshirovanii-i-keshah\/\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.3\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/otus.ru\\\/journal\\\/vse-o-keshirovanii-i-keshah\\\/#article\",\"name\":\"\\u041a\\u044d\\u0448 \\u0438 \\u043a\\u044d\\u0448\\u0438\\u0440\\u043e\\u0432\\u0430\\u043d\\u0438\\u0435: \\u043a\\u0430\\u043a \\u0440\\u0430\\u0431\\u043e\\u0442\\u0430\\u0435\\u0442, \\u0443\\u0440\\u043e\\u0432\\u043d\\u0438 \\u0438 \\u0441\\u0442\\u0440\\u0430\\u0442\\u0435\\u0433\\u0438\\u0438 | Otus\",\"headline\":\"\\u041a\\u044d\\u0448 \\u0438 \\u043a\\u044d\\u0448\\u0438\\u0440\\u043e\\u0432\\u0430\\u043d\\u0438\\u0435: \\u0447\\u0442\\u043e \\u044d\\u0442\\u043e, \\u043a\\u0430\\u043a \\u0440\\u0430\\u0431\\u043e\\u0442\\u0430\\u0435\\u0442 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