{"id":79051,"date":"2020-04-23T19:43:32","date_gmt":"2020-04-23T17:43:32","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/novyj-metod-upravleniya-pamyatyu-ot-facebook"},"modified":"2020-04-23T19:43:32","modified_gmt":"2020-04-23T17:43:32","slug":"novyj-metod-upravleniya-pamyatyu-ot-facebook","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/novyj-metod-upravleniya-pamyatyu-ot-facebook","title":{"rendered":"Uus m\u00e4luhaldusmeetod Facebookist","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00dcks sotsiaalv\u00f5rgustiku arendusmeeskonna liige <strong>Facebook<\/strong>, <strong>Roman Gushchin<\/strong>, pakkus arendajate jagamises komplekti <strong>Linuxi tuuma plaastritest<\/strong>, mis suunavad m\u00e4lu toimimise parandamisele l\u00e4bi uue juhtimisseadme rakendamise \u2014  <strong>slab (slab m\u00e4lu kontroller)<\/strong>.<\/p>\n<p><strong>Slab jaotamine<\/strong> \u2013 see on m\u00e4lu juhtimismehhanism, mis on loodud m\u00e4lu efektiivsemaks jaotamiseks ning olulise fragmenteerimise k\u00f5rvaldamiseks. Selle algoritmi aluseks on eraldatud m\u00e4lu s\u00e4ilitamine, mis sisaldab teatud t\u00fc\u00fcpi objekti, ja selle m\u00e4lu taaskasutamine j\u00e4rgmise samat\u00fc\u00fcpi objekti eraldamiseks. See meetod tutvustas esmakordselt Jeff Bonwick SunOS-is ning seda kasutatakse laialdaselt paljude Unix-i operatsioonis\u00fcsteemide, sealhulgas FreeBSD ja Linuxi, tuumades.<\/p>\n<p>Uue kontrolleri aluseks on slab arvestuse \u00fcleviimine m\u00e4lulehtedelt tuuma objektide tasemele, mis v\u00f5imaldab \u00fchte slab-lehte jagada erinevates cgroupides, selle asemel, et m\u00e4\u00e4rata igale cgroupile eraldi vahem\u00e4lu.<\/p>\n<p>Katsetulemuste p\u00f5hjal on t\u00f5estatud, et ettepanekud m\u00e4lu haldamise meetodid v\u00f5imaldavad <strong>efektiivsuse<\/strong> suurenemine slab'i kasutuses <strong>kuni 45%<\/strong>, samuti v\u00e4hendab operatsioonis\u00fcsteemi tuuma kogu m\u00e4lu tarbimist. Samuti, t\u00e4nu slab'i lehtede arvu v\u00e4henemisele, v\u00e4heneb m\u00e4lufragmenteerimine, mis ei saa mitte kuidagi m\u00f5jutada s\u00fcsteemi reaktsiooniaega.<\/p>\n<p>Uut juhtimisseadet testitakse juba mitu kuud Facebooki t\u00f6\u00f6serverites ja seni v\u00f5ib seda testimist nimetada edukaiks: t\u00f6\u00f6v\u00f5imekuse kadude ja vigade arvu suurenemiseta on m\u00e4rgata selget m\u00e4lu tarbimise v\u00e4henemist \u2013 m\u00f5nedel serveritel kuni 1 GB. See number on \u00fcsna subjektiivne, kuna n\u00e4iteks varem l\u00e4bi viidud testid n\u00e4itasid veidi v\u00e4iksemaid tulemusi:<\/p>\n<ul>\n<li>650\u2013700 MB veebifrontendi peal<\/li>\n<li>750\u2013800 MB andmebaasi vahem\u00e4lu serveris<\/li>\n<li>700 MB DNS-serveris<\/li>\n<\/ul>\n<p><noindex><noindex><\/p>\n<p>&gt;&gt;&gt; <a rel=\"nofollow\" href=\"https:\/\/github.com\/rgushchin\">Autori lehek\u00fclg GitHubis<\/a><\/p>\n<p><\/noindex><\/noindex><br \/>\n<noindex><\/p>\n<p>&gt;&gt;&gt; <a rel=\"nofollow\" href=\"https:\/\/lwn.net\/Articles\/798605\/\">Varasemate testide tulemused<\/a><\/p>\n<p><\/noindex><\/p>\n<p>Allikas: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"http:\/\/www.linux.org.ru\/news\/linux-general\/15659654\">linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u0434\u0438\u043d \u0438\u0437 \u0447\u043b\u0435\u043d\u043e\u0432 \u043a\u043e\u043c\u0430\u043d\u0434\u044b \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0441\u043e\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0439 \u0441\u0435\u0442\u0438 Facebook, \u0420\u043e\u043c\u0430\u043d \u0413\u0443\u0449\u0438\u043d, \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0438\u043b \u0432 \u0440\u0430\u0441\u0441\u044b\u043b\u043a\u0435 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 \u043d\u0430\u0431\u043e\u0440 \u0438\u0437 \u043f\u0430\u0442\u0447\u0435\u0439 \u0434\u043b\u044f \u044f\u0434\u0440\u0430 Linux, \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u043d\u0430 \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u0435 \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u043f\u0430\u043c\u044f\u0442\u044c\u044e \u0447\u0435\u0440\u0435\u0437 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u043d\u043e\u0432\u043e\u0433\u043e \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440\u0430 \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043e\u043d\u043e\u0439 &#8212; slab (slab memory \u0441ontroller). \u0420\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0435 slab &ndash;\u2013 \u044d\u0442\u043e \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043f\u0430\u043c\u044f\u0442\u044c\u044e, \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u044b\u0439 \u0434\u043b\u044f \u0431\u043e\u043b\u0435\u0435 \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0433\u043e \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u043f\u0430\u043c\u044f\u0442\u0438 \u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0439 \u0444\u0440\u0430\u0433\u043c\u0435\u043d\u0442\u0430\u0446\u0438\u0438. \u041e\u0441\u043d\u043e\u0432\u043e\u0439 [&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":[702],"tags":[],"class_list":["post-79051","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u0434\u0438\u043d \u0438\u0437 \u0447\u043b\u0435\u043d\u043e\u0432 \u043a\u043e\u043c\u0430\u043d\u0434\u044b \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0441\u043e\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0439 \u0441\u0435\u0442\u0438 Facebook, \u0420\u043e\u043c\u0430\u043d \u0413\u0443\u0449\u0438\u043d, \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0438\u043b \u0432 \u0440\u0430\u0441\u0441\u044b\u043b\u043a\u0435 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