{"id":106149,"date":"2022-12-18T21:36:39","date_gmt":"2022-12-18T19:36:39","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-yadro-linux-6-2-vojdut-uluchsheniya-raid5-6-v-btrfs"},"modified":"2022-12-18T21:36:39","modified_gmt":"2022-12-18T19:36:39","slug":"v-yadro-linux-6-2-vojdut-uluchsheniya-raid5-6-v-btrfs","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/v-yadro-linux-6-2-vojdut-uluchsheniya-raid5-6-v-btrfs","title":{"rendered":"N\u00eb b\u00ebrtham\u00ebn e Linux 6.2 do t\u00eb p\u00ebrfshihen p\u00ebrmir\u00ebsime p\u00ebr RAID5\/6 n\u00eb Btrfs","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

P\u00ebr versionin e kernel-it Linux 6.2, jan\u00eb propozuar p\u00ebrmir\u00ebsime n\u00eb Btrfs q\u00eb lidhen me zgjidhjen e problem\u00ebs 'write hole' n\u00eb implementimin e RAID 5\/6. Problemi lidhet me faktin se, n\u00eb rast d\u00ebshtimi gjat\u00eb shkrimit, \u00ebsht\u00eb fillimisht e pamundur t\u00eb kuptohet se cila bllok n\u00eb cilin nga pajisjet RAID \u00ebsht\u00eb shkruar sakt\u00eb, dhe n\u00eb cilin shkrimi nuk \u00ebsht\u00eb p\u00ebrfunduar. N\u00eb rastin e p\u00ebrpjekjes p\u00ebr t\u00eb rregulluar RAID n\u00eb nj\u00eb situat\u00eb t\u00eb till\u00eb, mund t\u00eb ndodhin shkat\u00ebrrime t\u00eb bllok\u00ebve q\u00eb korrespondojn\u00eb me bllok\u00ebt e pap\u00ebrfunduara, pasi gjendja e bllok\u00ebve RAID \u00ebsht\u00eb e asinkronizuar. Ky problem ndodh n\u00eb \u00e7do grup RAID1\/5\/6 ku nuk merren masa speciale p\u00ebr t\u00eb luftuar k\u00ebt\u00eb efekt. <\/p>\n

N\u00eb implementimin e RAID, si RAID1 n\u00eb btrfs, ky problem zgjidhet p\u00ebrmes p\u00ebrdorimit t\u00eb checksum-eve n\u00eb t\u00eb dy kopjet, n\u00eb rast t\u00eb mos p\u00ebrputhjes, t\u00eb dh\u00ebnat thjesht rikuperohen nga kopja e dyt\u00eb. Ky qasje gjithashtu funksionon n\u00ebse ndonj\u00eb pajisje fillon t\u00eb jap\u00eb t\u00eb dh\u00ebna t\u00eb pasakta n\u00eb vend t\u00eb nj\u00eb d\u00ebshtimi t\u00eb plot\u00eb. <\/p>\n

Megjithat\u00eb, n\u00eb rastin e RAID5\/6, sistemi i dosjeve nuk ruan checksum-e p\u00ebr blloqet e paritetit: n\u00eb nj\u00eb situat\u00eb normale, sakt\u00ebsia e blloqeve kontrollohet nga fakti se ato jan\u00eb t\u00eb gjitha t\u00eb pajisura me nj\u00eb checksum, dhe blloku i paritetit mund t\u00eb rind\u00ebrtohet nga t\u00eb dh\u00ebnat. Megjithat\u00eb, n\u00eb rastin e nj\u00eb shkrimi t\u00eb pjessh\u00ebm, ky qasje n\u00eb disa situata mund t\u00eb mos funksionoj\u00eb. N\u00eb k\u00ebt\u00eb rast, gjat\u00eb rikuperimit t\u00eb array-it, nuk p\u00ebrjashtohet q\u00eb blloqet e prekur nga shkrimi i pap\u00ebrfunduar t\u00eb rikuperohen gabimisht. <\/p>\n

N\u00eb rastin e btrfs, ky problem \u00ebsht\u00eb m\u00eb i r\u00ebnd\u00ebsish\u00ebm n\u00ebse shkrimi i prodhuar \u00ebsht\u00eb m\u00eb i vog\u00ebl se stripi. N\u00eb k\u00ebt\u00eb rast, sistemi i dosjeve duhet t\u00eb kryej\u00eb operacionin e leximit-modifikimit-shkrimit (read-modify-write, RMW). N\u00ebse gjat\u00eb k\u00ebsaj procesi haset blloqe me shkrim t\u00eb pap\u00ebrfunduar, n\u00eb k\u00ebt\u00eb rast operacioni RMW mund t\u00eb shkaktoj\u00eb shkat\u00ebrrime q\u00eb nuk do t\u00eb zbulojn\u00eb, pavar\u00ebsisht nga checksum-et. Zhvilluesit kan\u00eb b\u00ebr\u00eb ndryshime ku operacioni RMW kontrollon checksum-in e blloqeve para se t\u00eb kryej\u00eb k\u00ebt\u00eb operacion, dhe sipas nevoj\u00ebs p\u00ebr rikuperimin e t\u00eb dh\u00ebnave, kryen gjithashtu kontrollin e checksum-eve pas shkrimit. Fatkeq\u00ebsisht, n\u00eb situat\u00ebn me shkrimin e nj\u00eb strypi t\u00eb pap\u00ebrfunduar (RMW), kjo \u00e7on n\u00eb kosto shtes\u00eb p\u00ebr llogaritjen e checksum-eve, por ndihmon shum\u00eb n\u00eb rritjen e besueshm\u00ebris\u00eb. P\u00ebr RAID6, kjo logjik\u00eb ende nuk \u00ebsht\u00eb e gatshme, por p\u00ebr nj\u00eb d\u00ebshtim t\u00eb till\u00eb n\u00eb RAID6 \u00ebsht\u00eb e nevojshme q\u00eb shkrimi t\u00eb d\u00ebshtoj\u00eb n\u00eb 2 pajisje nj\u00ebher\u00ebsh, q\u00eb \u00ebsht\u00eb m\u00eb pak e mundur. <\/p>\n

Gjithashtu mund t\u00eb theksohen rekomandimet p\u00ebr p\u00ebrdorimin e RAID5\/6 nga zhvilluesit, t\u00eb cilat p\u00ebrqendrohen n\u00eb faktin se n\u00eb Btrfs profili i ruajtjes s\u00eb metadata dhe t\u00eb dh\u00ebnave mund t\u00eb ndryshoj\u00eb. N\u00eb k\u00ebt\u00eb rast, mund t\u00eb p\u00ebrdoret nj\u00eb profil RAID1 (pasqyr\u00eb) ose madje RAID1C3 (3 kopje) p\u00ebr metadata, nd\u00ebrsa p\u00ebr t\u00eb dh\u00ebnat mund t\u00eb p\u00ebrdoren RAID5 ose RAID6. Kjo siguron mbrojtje t\u00eb sigurt t\u00eb metadata dhe munges\u00ebn e 'write hole' nga nj\u00ebra an\u00eb dhe nj\u00eb p\u00ebrdorim m\u00eb efektiv t\u00eb hap\u00ebsir\u00ebs, karakteristik p\u00ebr RAID5\/6, nga ana tjet\u00ebr. Kjo ndihmon n\u00eb shmangien e shkat\u00ebrrimeve n\u00eb metadata, nd\u00ebrsa d\u00ebmtimet e t\u00eb dh\u00ebnave mund t\u00eb korrigjohen. <\/p>\n

Po ashtu, duhet theksuar se p\u00ebr SSD n\u00eb Btrfs n\u00eb kernelin 6.2 do t\u00eb aktivizohet nga default ekzekutimi asinkron i operacionit 'discard' (sh\u00ebnimi i bllok\u00ebve t\u00eb lir\u00eb, q\u00eb tashm\u00eb nuk duhet ruajtur fizikisht). Avantazhi i k\u00ebtij regjimi \u00ebsht\u00eb performanca e lart\u00eb p\u00ebr shkak t\u00eb grupimit efektiv t\u00eb operacioneve 'discard' n\u00eb radh\u00eb dhe p\u00ebrpunimit t\u00eb m\u00ebvonsh\u00ebm nga nj\u00eb p\u00ebrpunues n\u00eb sfond, pas t\u00eb cilit operacionet normale t\u00eb FS nuk ngadal\u00ebsohen, si n\u00eb rastin e 'discard' sinkron gjat\u00eb lirimit t\u00eb bllok\u00ebve, dhe SSD mund t\u00eb merr vendime m\u00eb t\u00eb mira. Nga ana tjet\u00ebr, m\u00eb nuk do t\u00eb nevojitet p\u00ebrdorimi i mjeteve si fstrim, sepse t\u00eb gjith\u00eb bllok\u00ebt e disponuesh\u00ebm do t\u00eb pastruhen n\u00eb FS pa nevoj\u00ebn p\u00ebr skanime t\u00eb m\u00ebtejshme dhe pa ngadal\u00ebsim t\u00eb operacioneve.
\n
Burimi: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0414\u043b\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u044f\u0434\u0440\u043e Linux 6.2 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u044b \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u044f Btrfs, \u043a\u0430\u0441\u0430\u044e\u0449\u0438\u0435\u0441\u044f \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b «write hole» \u0432 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 RAID 5\/6. \u0421\u0443\u0442\u044c \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0441\u0432\u043e\u0434\u0438\u0442\u0441\u044f \u043a \u0442\u043e\u043c\u0443, \u0447\u0442\u043e \u0435\u0441\u043b\u0438 \u043a\u0440\u0430\u0445 \u0441\u043b\u0443\u0447\u0438\u043b\u0441\u044f \u0432\u043e \u0432\u0440\u0435\u043c\u044f \u0437\u0430\u043f\u0438\u0441\u0438, \u0438\u0437\u043d\u0430\u0447\u0430\u043b\u044c\u043d\u043e \u043d\u0435\u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e \u043f\u043e\u043d\u044f\u0442\u044c \u043a\u0430\u043a\u043e\u0439 \u0431\u043b\u043e\u043a \u043d\u0430 \u043a\u0430\u043a\u043e\u043c \u0438\u0437 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 RAID \u0437\u0430\u043f\u0438\u0441\u0430\u043b\u0441\u044f \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e, \u0430 \u0432 \u043a\u0430\u043a\u043e\u043c \u0437\u0430\u043f\u0438\u0441\u044c \u043d\u0435 \u0431\u044b\u043b\u0430 \u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0430. \u0412 \u0441\u043b\u0443\u0447\u0430\u0435 \u043f\u043e\u043f\u044b\u0442\u043a\u0438 \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f RAID \u0432 \u043f\u043e\u0434\u043e\u0431\u043d\u043e\u0439 […]<\/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-106149","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47N\u00eb kernelin Linux 6.2 do t\u00eb hyjn\u00eb p\u00ebrmir\u00ebsime p\u00ebr RAID5\/6 n\u00eb Btrfs | ProHoster","description":"P\u00ebrfshirja e kernelit Linux 6.2 sjell p\u00ebrmir\u00ebsime p\u00ebr Btrfs, lidhur me rregullimin e problemit \"write hole\" n\u00eb implementimin e RAID 5\/6. Problemi q\u00ebndron n\u00eb faktin se, n\u00ebse ndodh nj\u00eb crash gjat\u00eb shkruarjes, fillimisht \u00ebsht\u00eb e pamundur t\u00eb kuptohet se cilat blloqe n\u00eb cilat prej pajisjeve t\u00eb RAID kan\u00eb shkruar sakt\u00eb, e cila administrat\u00eb nuk \u00ebsht\u00eb p\u00ebrfunduar. N\u00eb rastin e p\u00ebrpjekjes p\u00ebr t\u00eb rivendosur RAID n\u00eb nj\u00eb situat\u00eb t\u00eb till\u00eb.","canonical_url":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/v-yadro-linux-6-2-vojdut-uluchsheniya-raid5-6-v-btrfs","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sq_AL","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0412 \u044f\u0434\u0440\u043e Linux 6.2 \u0432\u043e\u0439\u0434\u0443\u0442 \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u044f RAID5\/6 \u0432 Btrfs | ProHoster","og:description":"\u0414\u043b\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u044f\u0434\u0440\u043e Linux 6.2 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u044b \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u044f Btrfs, \u043a\u0430\u0441\u0430\u044e\u0449\u0438\u0435\u0441\u044f \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b "write hole" \u0432 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 RAID 5\/6. \u0421\u0443\u0442\u044c \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0441\u0432\u043e\u0434\u0438\u0442\u0441\u044f \u043a \u0442\u043e\u043c\u0443, \u0447\u0442\u043e \u0435\u0441\u043b\u0438 \u043a\u0440\u0430\u0445 \u0441\u043b\u0443\u0447\u0438\u043b\u0441\u044f \u0432\u043e \u0432\u0440\u0435\u043c\u044f \u0437\u0430\u043f\u0438\u0441\u0438, \u0438\u0437\u043d\u0430\u0447\u0430\u043b\u044c\u043d\u043e \u043d\u0435\u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e \u043f\u043e\u043d\u044f\u0442\u044c \u043a\u0430\u043a\u043e\u0439 \u0431\u043b\u043e\u043a \u043d\u0430 \u043a\u0430\u043a\u043e\u043c \u0438\u0437 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 RAID \u0437\u0430\u043f\u0438\u0441\u0430\u043b\u0441\u044f \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e, \u0430 \u0432 \u043a\u0430\u043a\u043e\u043c \u0437\u0430\u043f\u0438\u0441\u044c \u043d\u0435 \u0431\u044b\u043b\u0430 \u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0430. \u0412 \u0441\u043b\u0443\u0447\u0430\u0435 \u043f\u043e\u043f\u044b\u0442\u043a\u0438 \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f RAID \u0432 \u043f\u043e\u0434\u043e\u0431\u043d\u043e\u0439","og:url":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/v-yadro-linux-6-2-vojdut-uluchsheniya-raid5-6-v-btrfs","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2022-12-18T19:36:39+00:00","article:modified_time":"2022-12-18T19:36:39+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/posts\/106149","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/comments?post=106149"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/posts\/106149\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/media?parent=106149"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/categories?post=106149"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/tags?post=106149"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}