{"id":111888,"date":"2023-12-01T09:10:14","date_gmt":"2023-12-01T07:10:14","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-openzfs-2-1-14-i-2-2-2-s-ustraneniem-oshibki-privodyashhej-k-povrezhdeniyu-fajlov"},"modified":"2023-12-01T09:10:14","modified_gmt":"2023-12-01T07:10:14","slug":"obnovlenie-openzfs-2-1-14-i-2-2-2-s-ustraneniem-oshibki-privodyashhej-k-povrezhdeniyu-fajlov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/obnovlenie-openzfs-2-1-14-i-2-2-2-s-ustraneniem-oshibki-privodyashhej-k-povrezhdeniyu-fajlov","title":{"rendered":"OpenZFS 2.1.14 \u00e9s 2.2.2 friss\u00edt\u00e9s, amely kijav\u00edtja a f\u00e1jlok s\u00e9r\u00fcl\u00e9s\u00e9t okoz\u00f3 hib\u00e1t","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Kiad\u00e1sra ker\u00fclt az OpenZFS 2.1.14 \u00e9s 2.2.2 jav\u00edt\u00f3friss\u00edt\u00e9se, amely a ZFS f\u00e1jlrendszer Linuxra \u00e9s FreeBSD-re t\u00f6rt\u00e9n\u0151 implement\u00e1l\u00e1s\u00e1t fejleszti. A friss\u00edt\u00e9sekben megoldott\u00e1k a dnode cache konzisztenci\u00e1j\u00e1nak ellen\u0151rz\u00e9s\u00e9re vonatkoz\u00f3 k\u00f3d hib\u00e1j\u00e1t, amely adatk\u00e1rosod\u00e1st okozhatott a f\u00e1jlokban, ha azok \u00fcres ter\u00fcleteket tartalmaztak, a m\u00f3dos\u00edt\u00e1sok ut\u00e1ni m\u00e1sol\u00e1s sor\u00e1n. <\/p>\n

Eredetileg a probl\u00e9m\u00e1t a 2.2.1-es verzi\u00f3ban pr\u00f3b\u00e1lt\u00e1k megoldani, de a jav\u00edt\u00e1s hat\u00e1stalannak bizonyult. A hiba hossz\u00fa ideig \u00e9szrev\u00e9tlen maradt, \u00e9s a coreutils 9.x csomagban a 'cp' utilit\u00e1sban v\u00e9grehajtott m\u00f3dos\u00edt\u00e1sok ut\u00e1n kezdett megnyilv\u00e1nulni. Felt\u00e9telezhet\u0151, hogy a Red Hat Enterprise Linux \u00e9s annak alapj\u00e1t k\u00e9pez\u0151 disztrib\u00faci\u00f3k eset\u00e9ben a probl\u00e9ma nem jelentkezik, mivel a RHEL 9 coreutils 8.x csomagot haszn\u00e1l, amely a 'cp' utilit\u00e1s m\u00e1s logik\u00e1j\u00e1val m\u0171k\u00f6dik. <\/p>\n

A probl\u00e9ma a f\u00e1jlok m\u00e1sol\u00e1s\u00e1ra k\u00e9pes eszk\u00f6z\u00f6k haszn\u00e1latakor jelentkezik, amelyek k\u00e9pesek az \u00fcres ter\u00fcletek azonos\u00edt\u00e1s\u00e1ra \u00e9s optimaliz\u00e1l\u00e1s\u00e1ra a f\u00e1jlokban. K\u00e1rosod\u00e1s l\u00e9phet fel a terhelt f\u00e1jlrendszerekben, amikor egy f\u00e1jlt m\u00e1solnak, ha a m\u0171velet szinte azonnal a m\u00f3dos\u00edt\u00e1s ut\u00e1n t\u00f6rt\u00e9nik, \u00e9s egy r\u00e9szadat csak a dirty cache-ben marad, \u00e9s m\u00e9g nem ker\u00fcl ki\u00edr\u00e1sra a lemezre. <\/p>\n

Az \u00fcres ter\u00fcletek kezel\u00e9se \u00e9rdek\u00e9ben az OpenZFS a 0.6.2 verzi\u00f3t\u00f3l kezd\u0151d\u0151en t\u00e1mogatja a SEEK_HOLE \u00e9s SEEK_DATA m\u0171veleteket, amelyek lehet\u0151v\u00e9 teszik az \u00fcres f\u00e1jlter\u00fcletek \u00e1tugr\u00e1s\u00e1t lemezr\u0151l val\u00f3 olvas\u00e1skor. Az \u00fcres ter\u00fcletek azonos\u00edt\u00e1sa \u00e9s r\u00f3luk sz\u00f3l\u00f3 inform\u00e1ci\u00f3k meg\u0151rz\u00e9se csak akkor t\u00f6rt\u00e9nik, miut\u00e1n az \u00f6sszes, f\u00e1jlhoz kapcsol\u00f3d\u00f3, cache-ben tal\u00e1lhat\u00f3 adat ki\u00edr\u00e1sra ker\u00fclt a lemezre. Az OpenZFS-ben a ki\u00edr\u00e1s megkezd\u00e9s\u00e9hez van egy ellen\u0151rz\u00e9s, amely \u00e9rt\u00e9keli a cache-ben l\u00e9v\u0151 nem mentett adatok jelenl\u00e9t\u00e9t, \u00e9s k\u00e9nyszer\u00edtett ki\u00edr\u00e1st v\u00e9gez a lemezre, amely sz\u00fcks\u00e9ges a SEEK_HOLE \u00e9s SEEK_DATA haszn\u00e1lat\u00e1hoz. <\/p>\n

Sajnos a vizsg\u00e1lat hi\u00e1nyosnak bizonyult, \u00e9s bizonyos k\u00f6r\u00fclm\u00e9nyek k\u00f6z\u00f6tt a ki\u00fcr\u00edt\u00e9s \u00e1llapota t\u00e9vesen lett meghat\u00e1rozva, \u00edgy a kor\u00e1bbi adatok maradtak a lemezen, ha a k\u00e9r\u00e9s egy kis id\u0151ablakba esett a k\u00e9t adatki\u00fcr\u00edt\u00e9si m\u0171velet k\u00f6z\u00f6tt. Az olvas\u00e1si m\u0171veletek, amelyek a \u00fcres ter\u00fcletek bet\u00f6lt\u00e9s\u00e9t optimaliz\u00e1lj\u00e1k, ebben az id\u0151pontban kihagyhatt\u00e1k az adatok egy r\u00e9sz\u00e9nek olvas\u00e1s\u00e1t, mivel \u00fcresnek tekintett\u00e9k azokat, m\u00edg a f\u00e1jllal dolgoz\u00f3 program addig v\u00e1ltoz\u00e1sokat vihetett be az \u00fcres ter\u00fcletekbe. Ennek eredm\u00e9nyek\u00e9nt a 'cp' utilit\u00e1s haszn\u00e1lata \u00fcres ter\u00fcleteket tartalmaz\u00f3 m\u00e1solat l\u00e9trej\u00f6tt\u00e9hez vezethetett, ahol az eredeti f\u00e1jlban nem voltak ilyen ter\u00fcletek.
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\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 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\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\udd47OpenZFS 2.1.14 \u00e9s 2.2.2 friss\u00edt\u00e9s, amely jav\u00edtja a f\u00e1jlok megs\u00e9r\u00fcl\u00e9s\u00e9hez vezet\u0151 hib\u00e1t | ProHoster","description":"Kijav\u00edtott\u00e1k az OpenZFS 2.1.14 \u00e9s 2.2.2 projekt kiad\u00e1sait, amelyek a ZFS f\u00e1jlrendszer 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