{"id":55519,"date":"2020-01-22T00:00:00","date_gmt":"2020-01-21T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/dlya-btrfs-predstavlena-asinhronnaya-realizatsiya-discard"},"modified":"2020-02-18T14:03:38","modified_gmt":"2020-02-18T11:03:38","slug":"dlya-btrfs-predstavlena-asinhronnaya-realizatsiya-discard","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/dlya-btrfs-predstavlena-asinhronnaya-realizatsiya-discard","title":{"rendered":"Btrfs jaoks on esitatud as\u00fcnkroonne DISCARD rakendus","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

btrfs failis\u00fcsteemi jaoks esitatud<\/a><\/noindex> as\u00fcnkroonne DISCARD operatsiooni rakendus (m\u00e4rgistamine vabastatud plokkidele, mida ei pea enam f\u00fc\u00fcsiliselt s\u00e4ilitama), mille on v\u00e4lja t\u00f6\u00f6tanud Facebooki insenerid.<\/p>\n

Probleemi olemus: algses rakenduses teostatakse DISCARD s\u00fcnkronselt teiste operatsioonidega, mis m\u00f5nes olukorras toob kaasa j\u00f5udlusprobleeme, kuna tuleb oodata vastavate k\u00e4skude l\u00f5ppemist salvestusseadmest, mis n\u00f5uab lisanduvate aegade tarvitamist. See v\u00f5ib olla probleemiks, kui DISCARD rakendamine salvestusseadmest t\u00f6\u00f6tab aeglaselt. <\/p>\n

As\u00fcnkroonse rakenduse puhul ei pea ootele j\u00e4\u00e4ma DISCARD l\u00f5petamise osas salvestusseadmelt tavap\u00e4rase failis\u00fcsteemi t\u00f6\u00f6 ajal, mis lahendab probleemi, muutes selle operatsiooni taustategevuseks. Esitatud rakendus teostab ka teatud optimeerimisi. N\u00e4iteks ootab see m\u00f5nda aega, arvestades, et plokk v\u00f5ib peagi uuesti kasutusele v\u00f5tta, mis muudab DISCARD protseduuri teostamise m\u00f5ttetuks, ja p\u00fc\u00fcab samuti \u00fchendada piirkondi enne DISCARD'i tegelikku t\u00e4itmist, et v\u00e4hendada \u00fcldiste toimingute arvu.<\/p>\n

<\/a><\/noindex><\/p>\n

Allikas: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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