Au fost formulate versiuni corective pentru proiectul OpenZFS 2.1.14 \u0219i 2.2.2, care dezvolt\u0103 implementarea sistemului de fi\u0219iere ZFS pentru Linux \u0219i FreeBSD. \u00cen actualiz\u0103ri a fost remediat\u0103 problema din codul de verificare a coeren\u021bei cache-ului dnode, care ducea la deteriorarea datelor \u00een fi\u0219ierele ce con\u021bineau zone goale, \u00een urma copiilor efectuate dup\u0103 modific\u0103ri. <\/p>\n
Ini\u021bial, problema a fost abordat\u0103 \u00een versiunea 2.2.1, dar solu\u021bia s-a dovedit ineficient\u0103. Eroarea a r\u0103mas nep\u0103sat\u0103 pentru o perioad\u0103 lung\u0103 de timp \u0219i a \u00eenceput s\u0103 se manifeste dup\u0103 modific\u0103rile aduse utilitarului «cp» din pachetul coreutils 9.x. Se presupune c\u0103 \u00een Red Hat Enterprise Linux \u0219i distribu\u021biile bazate pe acesta, problema nu se manifest\u0103, deoarece \u00een RHEL 9 se utilizeaz\u0103 pachetul coreutils 8.x, cu o logic\u0103 diferit\u0103 de func\u021bionare a utilitarului «cp». <\/p>\n
Problema se manifest\u0103 atunci c\u00e2nd se folosesc utilitare de copiere a fi\u0219ierelor care pot detecta \u0219i optimiza zonele goale din fi\u0219iere. Deteriorarea poate ap\u0103rea \u00een sistemele de fi\u0219iere solicitate \u00een timpul copiei unui fi\u0219ier, dac\u0103 opera\u021biunea este efectuat\u0103 aproape imediat dup\u0103 o modificare \u0219i o parte din date r\u0103m\u00e2ne doar \u00een cache-ul dirty \u0219i nu a fost \u00eenc\u0103 scris\u0103 pe disc. <\/p>\n
Pentru a optimiza lucrul cu zonele goale din fi\u0219iere, OpenZFS, \u00eencep\u00e2nd cu versiunea 0.6.2, suport\u0103 opera\u021biunile SEEK_HOLE \u0219i SEEK_DATA, care permit omisiunea zonei goale a fi\u0219ierului \u00een timpul citirii de pe disc. Recunoa\u0219terea zonelor goale \u0219i p\u0103strarea informa\u021biilor despre acestea se realizeaz\u0103 doar dup\u0103 scrierea pe disc a tuturor datelor r\u0103mase \u00een cache legate de fi\u0219ier. Pentru a ini\u021bia scrierea \u00een OpenZFS, exist\u0103 o verificare care evalueaz\u0103 prezen\u021ba \u00een cache a datelor nesalvate \u0219i efectueaz\u0103 o scriere for\u021bat\u0103 a informa\u021biilor pe disc, necesar\u0103 pentru utilizarea SEEK_HOLE \u0219i SEEK_DATA. <\/p>\n
Din p\u0103cate, verificarea s-a dovedit a fi incomplet\u0103, iar \u00een anumite circumstan\u021be, datele legate de starea reset\u0103rii erau determinate gre\u0219it, iar pe disc se afla informa\u021bia veche despre con\u021binutul fi\u0219ierului, dac\u0103 cererea c\u0103dea \u00eentr-un mic interval de timp \u00eentre cele dou\u0103 opera\u021bii de resetare a datelor din cache. Opera\u021biile de citire, care optimizeaz\u0103 \u00eenc\u0103rcarea zonelor goale, puteau rata citirea unei p\u0103r\u021bi din date \u00een acel moment, consider\u00e2ndu-le goale, \u00een timp ce programul care lucra cu fi\u0219ierul ar fi putut anterior s\u0103 fac\u0103 modific\u0103ri \u00een zonele goale. Ca rezultat, utilizarea utilitarului «cp» ar fi putut duce la crearea unei copii care con\u021binea zone goale acolo unde nu erau \u00een fi\u0219ierul original. \u0421\u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 OpenZFS 2.1.14 \u0438 2.2.2, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b ZFS \u0434\u043b\u044f Linux \u0438 FreeBSD. \u0412 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f\u0445 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432 \u043a\u043e\u0434\u0435 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0441\u043e\u0433\u043b\u0430\u0441\u043e\u0432\u0430\u043d\u043d\u043e\u0441\u0442\u0438 \u043a\u044d\u0448\u0430 dnode, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u043f\u043e\u0432\u0440\u0435\u0436\u0434\u0435\u043d\u0438\u044e \u0434\u0430\u043d\u043d\u044b\u0445 \u0432 \u0444\u0430\u0439\u043b\u0430\u0445, \u0441\u043e\u0434\u0435\u0440\u0436\u0430\u0432\u0448\u0438\u0445 \u043f\u0443\u0441\u0442\u044b\u0435 \u043e\u0431\u043b\u0430\u0441\u0442\u0438, \u043f\u0440\u0438 \u0438\u0445 \u043a\u043e\u043f\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0438 \u043f\u043e\u0441\u043b\u0435 \u0432\u043d\u0435\u0441\u0435\u043d\u0438\u044f \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439. \u0418\u0437\u043d\u0430\u0447\u0430\u043b\u044c\u043d\u043e \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0443 \u043f\u043e\u043f\u044b\u0442\u0430\u043b\u0438\u0441\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0438\u0442\u044c \u0432 \u0432\u0435\u0440\u0441\u0438\u0438 2.2.1, \u043d\u043e \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043e\u043a\u0430\u0437\u0430\u043b\u043e\u0441\u044c \u043d\u0435\u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e. \u041e\u0448\u0438\u0431\u043a\u0430 \u0434\u043e\u043b\u0433\u043e\u0435 […]<\/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-111888","post","type-post","status-publish","format-standard","hentry","category-news"],"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\udd47Actualizarea OpenZFS 2.1.14 \u0219i 2.2.2 cu corectarea erorii care ducea la coruperea fi\u0219ierelor | ProHoster","description":"S-au format versiuni corective ale proiectului OpenZFS 2.1.14 \u0219i 2.2.2, care dezvolt\u0103 implementarea sistemului de fi\u0219iere ZFS pentru Linux \u0219i FreeBSD.","canonical_url":"https:\/\/prohoster.info\/ro\/blog\/news\/obnovlenie-openzfs-2-1-14-i-2-2-2-s-ustraneniem-oshibki-privodyashhej-k-povrezhdeniyu-fajlov","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"ro_RO","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\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 OpenZFS 2.1.14 \u0438 2.2.2 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c 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Sursa: opennet.ro<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"