{"id":102666,"date":"2021-12-19T15:37:03","date_gmt":"2021-12-19T13:37:03","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-cache-bench-0-2-0-dlya-issledovaniya-effektivnosti-keshirovaniya-fajlov"},"modified":"2021-12-19T15:37:03","modified_gmt":"2021-12-19T13:37:03","slug":"vypusk-cache-bench-0-2-0-dlya-issledovaniya-effektivnosti-keshirovaniya-fajlov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/vypusk-cache-bench-0-2-0-dlya-issledovaniya-effektivnosti-keshirovaniya-fajlov","title":{"rendered":"Verze cache-bench 0.2.0 byla vyd\u00e1na pro zkoum\u00e1n\u00ed efektivity cachov\u00e1n\u00ed soubor\u016f.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Po 7 m\u011bs\u00edc\u00edch od p\u0159edchoz\u00ed verze byl vyd\u00e1n cache-bench 0.2.0. Cache-bench \u2014 to je Python skript, kter\u00fd umo\u017e\u0148uje vyhodnotit vliv nastaven\u00ed virtu\u00e1ln\u00ed pam\u011bti (vm.swappiness, vm.watermark_scale_factor, Multigenerational LRU Framework a dal\u0161\u00ed) na v\u00fdkon \u00faloh, jejich\u017e vykon\u00e1v\u00e1n\u00ed z\u00e1vis\u00ed na cachov\u00e1n\u00ed operac\u00ed \u010dten\u00ed soubor\u016f, zejm\u00e9na za podm\u00ednek nedostatku pam\u011bti. K\u00f3d je otev\u0159en pod licenc\u00ed CC0.  <\/p>\n<p>  K\u00f3d skriptu ve verzi 0.2.0 byl t\u00e9m\u011b\u0159 \u00fapln\u011b p\u0159eps\u00e1n. Nyn\u00ed m\u00edsto \u010dten\u00ed soubor\u016f z ur\u010den\u00e9ho adres\u00e1\u0159e (v nov\u00e9 verzi byla mo\u017enost -d odstran\u011bna) se prov\u00e1d\u00ed \u010dten\u00ed z jednoho souboru po \u010d\u00e1stech ur\u010den\u00e9 velikosti v n\u00e1hodn\u00e9m po\u0159ad\u00ed.  <\/p>\n<p>  Byly p\u0159id\u00e1ny mo\u017enosti:  <\/p>\n<ul>\n<li class=\"l\">  \u2014file \u2014 cesta k souboru, ze kter\u00e9 se bude \u010d\u00edst.\n<li class=\"l\">  \u2014chunk \u2014 velikost fragmentu v kibibajtech, v\u00fdchoz\u00ed hodnota je 64.\n<li class=\"l\">  \u2014mmap \u2014 \u010d\u00edst z memory-mapped souborov\u00e9ho objektu m\u00edsto \u010dten\u00ed z file descriptoru.\n<li class=\"l\">  \u2014preread \u2014 p\u0159ed za\u010d\u00e1tkem testu p\u0159edb\u011b\u017en\u011b p\u0159e\u010d\u00edst (cache) zadan\u00fd soubor sekven\u010dn\u00edm \u010dten\u00edm fragmenty o velikosti 1 MiB.\n<li class=\"l\">  \u2014bloat \u2014 p\u0159id\u00e1vat \u010dten\u00e9 fragmenty do seznamu za \u00fa\u010delem zv\u00fd\u0161en\u00ed spot\u0159eby pam\u011bti procesem a n\u00e1sledn\u00e9ho vytv\u00e1\u0159en\u00ed nedostatku pam\u011bti.\n<li class=\"l\">  \u2014interval \u2014 interval v\u00fdstupu (logov\u00e1n\u00ed) v\u00fdsledk\u016f v sekund\u00e1ch.    <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56376\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u043f\u0443\u0441\u0442\u044f 7 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u043f\u043e\u0441\u043b\u0435 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0435\u0433\u043e \u0440\u0435\u043b\u0438\u0437\u0430 \u0432\u044b\u0448\u0435\u043b cache-bench 0.2.0. Cache-bench &#8212; \u044d\u0442\u043e Python \u0441\u043a\u0440\u0438\u043f\u0442, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0439 \u043e\u0446\u0435\u043d\u0438\u0442\u044c \u0432\u043b\u0438\u044f\u043d\u0438\u0435 \u043d\u0430\u0441\u0442\u0440\u043e\u0435\u043a \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438 (vm.swappiness, vm.watermark_scale_factor, Multigenerational LRU Framework \u0438 \u043f\u0440\u043e\u0447\u0438\u0445) \u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u0434\u0430\u0447, \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0437\u0430\u0432\u0438\u0441\u0438\u0442 \u043e\u0442 \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0444\u0430\u0439\u043b\u043e\u0432\u044b\u0445 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439 \u0447\u0442\u0435\u043d\u0438\u044f, \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e \u0432 \u0443\u0441\u043b\u043e\u0432\u0438\u044f\u0445 \u043d\u0435\u0445\u0432\u0430\u0442\u043a\u0438 \u043f\u0430\u043c\u044f\u0442\u0438. \u041a\u043e\u0434 \u043e\u0442\u043a\u0440\u044b\u0442 \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 CC0. \u041a\u043e\u0434 \u0441\u043a\u0440\u0438\u043f\u0442\u0430 \u0432 \u0432\u0435\u0440\u0441\u0438\u0438 0.2.0 \u043f\u043e\u0447\u0442\u0438 \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e [&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-102666","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One 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