Byly vytvo\u0159eny opravn\u00e9 verze projektu OpenZFS 2.1.14 a 2.2.2, kter\u00e9 rozv\u00edjej\u00ed implementaci souborov\u00e9ho syst\u00e9mu ZFS pro Linux a FreeBSD. V aktualizac\u00edch byla odstran\u011bna chyba v k\u00f3du ov\u011b\u0159ov\u00e1n\u00ed konzistence cache dnode, kter\u00e1 vedla k po\u0161kozen\u00ed dat v souborech obsahuj\u00edc\u00edch pr\u00e1zdn\u00e9 oblasti p\u0159i jejich kop\u00edrov\u00e1n\u00ed po proveden\u00ed zm\u011bn. <\/p>\n
Probl\u00e9m byl p\u016fvodn\u011b pokus o \u0159e\u0161en\u00ed ve verzi 2.2.1, ale oprava se uk\u00e1zala jako ne\u00fa\u010dinn\u00e1. Chyba z\u016fstala dlouho nezpozorov\u00e1na a za\u010dala se projevovat po zm\u011bn\u00e1ch proveden\u00fdch v utilit\u011b <cp> v bal\u00ed\u010dku coreutils 9.x. P\u0159edpokl\u00e1d\u00e1 se, \u017ee v Red Hat Enterprise Linux a distribuc\u00edch na jeho z\u00e1klad\u011b se probl\u00e9m neprojevuje, proto\u017ee v RHEL 9 se pou\u017e\u00edv\u00e1 bal\u00ed\u010dek coreutils 8.x s jinou logikou pr\u00e1ce utilit <cp>. <\/p>\n
Probl\u00e9m se projevuje p\u0159i pou\u017eit\u00ed utilit pro kop\u00edrov\u00e1n\u00ed soubor\u016f, kter\u00e9 dok\u00e1\u017eou detekovat a optimalizovat pr\u00e1zdn\u00e9 oblasti v souborech. Po\u0161kozen\u00ed m\u016f\u017ee nastat na p\u0159et\u00ed\u017een\u00fdch souborov\u00fdch syst\u00e9mech p\u0159i kop\u00edrov\u00e1n\u00ed souboru, pokud je operace provedena t\u00e9m\u011b\u0159 okam\u017eit\u011b po zm\u011bn\u011b a \u010d\u00e1st dat z\u016fst\u00e1v\u00e1 pouze v dirty-cache a je\u0161t\u011b nebyla zaps\u00e1na na disk. <\/p>\n
Pro optimalizaci pr\u00e1ce s pr\u00e1zdn\u00fdmi oblastmi v souborech, OpenZFS, po\u010d\u00ednaje verz\u00ed 0.6.2, podporuje operace SEEK_HOLE a SEEK_DATA, kter\u00e9 umo\u017e\u0148uj\u00ed p\u0159esko\u010dit pr\u00e1zdnou oblast souboru p\u0159i \u010dten\u00ed z disku. Rozpozn\u00e1n\u00ed pr\u00e1zdn\u00fdch oblast\u00ed a uchov\u00e1v\u00e1n\u00ed informac\u00ed o nich se prov\u00e1d\u00ed pouze po zaps\u00e1n\u00ed v\u0161ech zb\u00fdvaj\u00edc\u00edch dat v cache, kter\u00e9 jsou spojeny se souborem, na disk. Pro iniciaci z\u00e1pisu m\u00e1 OpenZFS kontrolu, kter\u00e1 vyhodnocuje p\u0159\u00edtomnost neset\u0159en\u00fdch dat v cache a prov\u00e1d\u00ed nucen\u00fd z\u00e1pis informac\u00ed na disk, co\u017e je nutn\u00e9 pro pou\u017eit\u00ed SEEK_HOLE a SEEK_DATA. <\/p>\n
Bohu\u017eel se kontrola uk\u00e1zala jako ne\u00fapln\u00e1 a p\u0159i ur\u010dit\u00e9m shrom\u00e1\u017ed\u011bn\u00ed okolnost\u00ed byla data o stavu resetu ur\u010dena nespr\u00e1vn\u011b a na disku se nach\u00e1zely star\u00e9 informace o obsahu souboru, pokud dotaz spadl do \u00fazk\u00e9ho \u010dasov\u00e9ho okna mezi dv\u011bma operacemi resetov\u00e1n\u00ed dat z cache. Operace \u010dten\u00ed, optimalizuj\u00edc\u00ed na\u010d\u00edt\u00e1n\u00ed pr\u00e1zdn\u00fdch oblast\u00ed, mohly v tu chv\u00edli vynechat na\u010d\u00edt\u00e1n\u00ed \u010d\u00e1sti dat, pova\u017euj\u00edc je za pr\u00e1zdn\u00e1, zat\u00edmco program pracuj\u00edc\u00ed se souborem mohl p\u0159edt\u00edm prov\u00e9st zm\u011bny v pr\u00e1zdn\u00fdch oblastech. V d\u016fsledku toho mohlo pou\u017eit\u00ed utilit <cp> v\u00e9st ke vzniku kopie, kter\u00e1 obsahovala pr\u00e1zdn\u00e9 oblasti tam, kde v origin\u00e1ln\u00edm souboru nebyly. \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\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\udd47Aktualizace OpenZFS 2.1.14 a 2.2.2 s opravou chyby, kter\u00e1 vedla k po\u0161kozen\u00ed soubor\u016f | ProHoster","description":"Byly vytvo\u0159eny opravn\u00e9 verze projektu OpenZFS 2.1.14 a 2.2.2, kter\u00fd rozv\u00edj\u00ed implementaci souborov\u00e9ho syst\u00e9mu ZFS pro Linux a FreeBSD.","canonical_url":"https:\/\/prohoster.info\/cs\/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":"cs_CZ","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 \u043e\u0448\u0438\u0431\u043a\u0438, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0435\u0439 \u043a \u043f\u043e\u0432\u0440\u0435\u0436\u0434\u0435\u043d\u0438\u044e \u0444\u0430\u0439\u043b\u043e\u0432 | ProHoster","og:description":"\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.","og:url":"https:\/\/prohoster.info\/cs\/blog\/news\/obnovlenie-openzfs-2-1-14-i-2-2-2-s-ustraneniem-oshibki-privodyashhej-k-povrezhdeniyu-fajlov","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":"2023-12-01T07:10:14+00:00","article:modified_time":"2023-12-01T07:10:14+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\/cs\/wp-json\/wp\/v2\/posts\/111888","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=111888"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/111888\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=111888"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=111888"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=111888"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"