{"id":36837,"date":"2019-10-31T22:14:07","date_gmt":"2019-10-31T19:14:07","guid":{"rendered":"https:\/\/prohoster.info\/blog\/razmer-direktorij-ne-stoit-nashih-usilij\/"},"modified":"2019-10-31T22:14:07","modified_gmt":"2019-10-31T19:14:07","slug":"razmer-direktorij-ne-stoit-nashih-usilij","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/administrirovanie\/razmer-direktorij-ne-stoit-nashih-usilij","title":{"rendered":"O tamanho dos diret\u00f3rios n\u00e3o vale nosso esfor\u00e7o","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Este \u00e9 um post pequeno e engra\u00e7ado sobre diret\u00f3rios em sistemas *nix que \u00e9 completamente in\u00fatil e desnecess\u00e1rio na pr\u00e1tica. Afinal, \u00e9 sexta-feira.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nEm entrevistas, frequentemente surgem perguntas tediosas sobre inodes, que tudo \u00e9 arquivo, e poucos conseguem responder de forma razo\u00e1vel. Mas, se cavarmos um pouco mais fundo, podemos encontrar coisas curiosas. <\/p>\n<p>Para entender o post, aqui est\u00e3o alguns pontos:<\/p>\n<ul>\n<li>tudo \u00e9 arquivo. um diret\u00f3rio tamb\u00e9m \u00e9 um arquivo <\/li>\n<li>metadados de um arquivo s\u00e3o armazenados no inode, mas o nome do arquivo n\u00e3o \u00e9 armazenado ali <\/li>\n<li>o nome do arquivo \u00e9 armazenado nos dados do diret\u00f3rio <\/li>\n<li>o tamanho do diret\u00f3rio, aquele que aparece no ls e que por padr\u00e3o \u00e9 de 4KB, depende do n\u00famero de arquivos no diret\u00f3rio e do comprimento de seus nomes <\/li>\n<li>\u00e9 evidente que quanto mais arquivos, maior \u00e9 o tamanho do diret\u00f3rio<\/li>\n<\/ul>\n<p>\nE agora algo interessante: criamos um diret\u00f3rio com um milh\u00e3o de arquivos, verificamos o tamanho do diret\u00f3rio e depois apagamos todos os arquivos e olhamos o tamanho do diret\u00f3rio.<\/p>\n<pre><code class=\"bash\">$ mkdir niceDir &amp;&amp; cd niceDir\n# dependendo da velocidade do dispositivo, o pr\u00f3ximo comando pode levar de 2 a 10 minutos\n$ for ((i=1;i&lt;133700;i++)); do touch long_long_looong_man_sakeru_$i ; done\n$ ls -lhd .\ndrwxr-xr-x 2 user user 8.1M 2 de ago 13:37 .\n$ find . -type f -delete\n$ ls -l\ntotal 0\n$ ls -lhd .\ndrwxr-xr-x 2 user user 8.1M 2 de ago 13:37 .<\/code><\/pre>\n<p>\nComo se pode notar, o tamanho do diret\u00f3rio n\u00e3o mudou, embora parecesse que sim \ud83d\ude42<\/p>\n<p>Para corrigir o tamanho do diret\u00f3rio (sem remo\u00e7\u00e3o) s\u00f3 \u00e9 poss\u00edvel usando fsck (com a op\u00e7\u00e3o -D) em estado desmontado.<\/p>\n<p>E quando fui procurar por que isso acontece, descobri que h\u00e1 10 anos esse comportamento j\u00e1 foi relatado <noindex><a rel=\"nofollow\" href=\"https:\/\/lkml.org\/lkml\/2009\/5\/15\/146\">discutiram<\/a><\/noindex> no lkml. E, segundo os desenvolvedores, a corre\u00e7\u00e3o simplesmente n\u00e3o vale o esfor\u00e7o.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/462295\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u042d\u0442\u043e \u0441\u043e\u0432\u0435\u0440\u0448\u0435\u043d\u043d\u043e \u0431\u0435\u0441\u043f\u043e\u043b\u0435\u0437\u043d\u044b\u0439, \u043d\u0435\u043d\u0443\u0436\u043d\u044b\u0439 \u0432 \u043f\u0440\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u043c \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u0438, \u043d\u043e \u0437\u0430\u0431\u0430\u0432\u043d\u044b\u0439 \u043d\u0435\u0431\u043e\u043b\u044c\u0448\u043e\u0439 \u043f\u043e\u0441\u0442 \u043f\u0440\u043e \u0434\u0438\u0440\u0435\u043a\u0442\u043e\u0440\u0438\u0438 \u0432 *nix \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445. \u041f\u044f\u0442\u043d\u0438\u0446\u0430 \u0436\u0435. \u041d\u0430 \u0441\u043e\u0431\u0435\u0441\u0435\u0434\u043e\u0432\u0430\u043d\u0438\u044f\u0445 \u0447\u0430\u0441\u0442\u043e \u043f\u0440\u043e\u0441\u043a\u0430\u043a\u0438\u0432\u0430\u044e\u0442 \u0441\u043a\u0443\u0447\u043d\u044b\u0435 \u0432\u043e\u043f\u0440\u043e\u0441\u044b \u043f\u0440\u043e \u0430\u0439\u043d\u043e\u0434\u044b, \u0432\u0441\u0451-\u0435\u0441\u0442\u044c-\u0444\u0430\u0439\u043b\u044b, \u043d\u0430 \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043c\u0430\u043b\u043e \u043a\u0442\u043e \u043c\u043e\u0436\u0435\u0442 \u0432\u043c\u0435\u043d\u044f\u0435\u043c\u043e \u043e\u0442\u0432\u0435\u0442\u0438\u0442\u044c. \u041d\u043e \u0435\u0441\u043b\u0438 \u043a\u043e\u043f\u043d\u0443\u0442\u044c \u0447\u0443\u0442\u044c \u0433\u043b\u0443\u0431\u0436\u0435, \u043c\u043e\u0436\u043d\u043e \u043d\u0430\u0439\u0442\u0438 \u043b\u044e\u0431\u043e\u043f\u044b\u0442\u043d\u044b\u0435 \u0432\u0435\u0449\u0438. \u0414\u043b\u044f \u043f\u043e\u043d\u0438\u043c\u0430\u043d\u0438\u044f \u043f\u043e\u0441\u0442\u0430 \u043d\u0435\u043c\u043d\u043e\u0433\u043e \u0442\u0435\u0437\u0438\u0441\u043e\u0432: \u0432\u0441\u0451 \u0435\u0441\u0442\u044c \u0444\u0430\u0439\u043b. \u0434\u0438\u0440\u0435\u043a\u0442\u043e\u0440\u0438\u044f \u2014 \u044d\u0442\u043e \u0442\u043e\u0436\u0435 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-36837","post","type-post","status-publish","format-standard","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u042d\u0442\u043e \u0441\u043e\u0432\u0435\u0440\u0448\u0435\u043d\u043d\u043e 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