{"id":184270,"date":"2026-11-15T11:45:19","date_gmt":"2026-11-15T09:45:26","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/predstavlen-xraid-s-realizacziej-raid-dlya-xfs"},"modified":"2026-11-15T11:45:30","modified_gmt":"2026-11-15T09:45:30","slug":"xraid-introduced-with-raid-implementation-for-xfs","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/xraid-introduced-with-raid-implementation-for-xfs","title":{"rendered":"Esitletud on XRAID, millel on RAID teostus XFS jaoks","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Christoph Hellwig, DMA subsystem maintainer, KVM, Slab Allocator, and PowerPC architecture in the Linux kernel, has introduced the first public release of XRAID, an implementation of declustered RAID with parity control integrated into the XFS file system. The project aims to add the capability of using RAID on zoned storage devices, such as Shingled Magnetic Recording (SMR) disks, and to provide a high-performance RAID implementation to maintain data integrity. In addition to zoned devices, XRAID also supports operation on conventional hard drives and SSDs, demonstrating a significant performance increase on the latter compared to mdraid (up to 20 times in writes).<\/p>\n

XRAID applies declustered parity control for distributing information across storage devices, reminiscent of dRAID in OpenZFS, where hot spares are not designated as separate drives. Instead, data, parity information, and spare space are evenly distributed across all drives. The process of reading, writing, and recovery in case of failures encompasses all available drives, enhancing throughput, reducing the load on individual disks, preventing noticeable performance drops during failures, and significantly speeding up the rebuild process after adding or replacing drives.<\/p>\n

Declustered RAID also simplifies the creation of fault-tolerant arrays with a very large number of drives. During recovery after failures, XRAID dynamically determines the order of drive rebuilding, prioritizing areas with a higher loss of redundant information and rebuilding data zones ahead of parity information areas.<\/p>\n

XRAID on alguses arenes silmas pidades v\u00f5imalust kasutada tsoonitud andmekandjaid, kus salvestusruum jaguneb tsoonideks, mis koosnevad plokkide v\u00f5i sektorite gruppidest. Sellistes seadmetes on lubatud andmete j\u00e4rjestikune lisamine koos kogu plokigruppi t\u00e4ieliku uuendamisega. N\u00e4iteks kasutatakse salvestamise tsoonimist SMR (Shingled Magnetic Recording) ketastes, kus rajatee laius on v\u00e4iksem kui magnetpea laius ja salvestamine toimub osaliselt naaberrajaga kattumisega, st igasugune \u00fcmberkirjutamine toob kaasa kogu rajagruppi \u00fcmberkirjutamise vajaduse. <\/p>\n

Zoonitud seadmete toetamiseks XRAID-s on rakendatud Linuxi s\u00fcdamikus ja XFS-is tsoonitud seadmete plokkide jaoturit (zoned allocator), mis kasutab RT-alamhulka (RealTime subvolume) andmete ja metaandmete eraldi salvestamise korraldamiseks (tsooni j\u00e4rjestikuse salvestamise korral on salvestatud ainult failide sisu, samas kui FS metaandmed on paigutatud tavap\u00e4rastes tsoonides v\u00f5i lisanduvatele SSD-andmekandjatele). <\/p>\n

XRAID-s rakendatakse RAID-kontrollimehhanisme ainult failide sisu jaoks, samas kui metaandmete \u00fclem\u00e4\u00e4rasus saavutatakse juba olemasolevate Linuxi tuuma draiverite kaudu, n\u00e4iteks peegeldamise kaudu MD RAID-i abil, mis on t\u00f5husam v\u00e4ikeste objektide t\u00f6\u00f6tlemisel kohapeal. RAID-iteostus integreeritakse XFS-i zoone sisestamise t\u00f6\u00f6tlejatesse, mis esindavad f\u00fc\u00fcsilisi tsoone alumistel andmekandjatel loogiliste tsoonidena, sarnaselt mitmekihilistele plokkseadmetele.<\/p>\n

XRAID on t\u00f6\u00f6 k\u00e4inud juba poolteist aastat, ja kuigi rakendus ei ole veel p\u00f5hituuma integreerimiseks valmis, on see juba laiemale publikule testimiseks sobiv. Pakutavas rakenduses toetatakse 0 kuni 2 pariteedi taset (koostatakse kood, et toetada 3 ja enamat taset). XRAID-i haldamiseks on xfsprogs t\u00f6\u00f6riistakomplekti lisatud uus utiliit «xraid» ja XRAID-i tugi on rakendatud mkfs-s. Lisaks sellele on Zonar utiliidile, mis inspekteerib tsoonitud m\u00e4luseadmeid, lisatud v\u00f5imalused loogiliste tsoonide f\u00fc\u00fcsilistele tsoonidele visualiseerimiseks.<\/p>\n

Avaldatud on XRAID-i j\u00f5udlustestide tulemused, mis on v\u00f5rreldud mdraid ja btrfs-iga, tehtud XRAID-massiivis, mis koosneb kahest WD DC-SN650 SSD-draivist metadate jaoks (mdraid-p\u00f5hine peegel), kuuest tavalisest WD DC-HC590 26 TB SATA-draivist ja 6-21 jaotatud WD DC-HC690 30 TB (SMR) draivist.<\/p>\n

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XRAID-i teste on samuti teostatud tavalistel jaotamata SSD-draividel, mis koosneb \u00fchest 4 TiB Samsung PM9D3a metadate jaoks ja viiest 4 TiB Samsung PM9D3a RAID-i jaoks (4 + 1).<\/p>\n

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

\u041a\u0440\u0438\u0441\u0442\u043e\u0444 \u0425\u0435\u043b\u0432\u0438\u0433 (Christoph Hellwig), \u043c\u044d\u0439\u043d\u0442\u0435\u0439\u043d\u0435\u0440 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c DMA, KVM, Slab Allocator \u0438 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b PowerPC \u0432 \u044f\u0434\u0440\u0435 Linux, \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b \u043f\u0435\u0440\u0432\u044b\u0439 \u043f\u0443\u0431\u043b\u0438\u0447\u043d\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a XRAID, \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0434\u0435\u043a\u043b\u0430\u0441\u0442\u0435\u0440\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e RAID \u0441 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0435\u043c \u0447\u0451\u0442\u043d\u043e\u0441\u0442\u0438, \u0438\u043d\u0442\u0435\u0433\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u0432 \u0444\u0430\u0439\u043b\u043e\u0432\u0443\u044e \u0441\u0438\u0441\u0442\u0435\u043c\u0443 XFS. \u041f\u0440\u043e\u0435\u043a\u0442 \u0441\u043e\u0437\u0434\u0430\u043d \u0441 \u0446\u0435\u043b\u044c\u044e \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f RAID \u043d\u0430 \u0437\u043e\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430\u0445 \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f, \u0442\u0430\u043a\u0438\u0445 \u043a\u0430\u043a \u0434\u0438\u0441\u043a\u0438 SMR (Shingled Magnetic Recording), \u0438 \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0432\u044b\u0441\u043e\u043a\u043e\u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":184272,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-184270","post","type-post","status-publish","format-standard","has-post-thumbnail","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\n","aioseo_head_json":{"title":"\ud83e\udd47 XRAID on esitatud XFS-ile m\u00f5eldud RAID-i teostuse kujul | ProHoster","description":"Christoph Hellwig, Linuxi tuuma DMA, KVM, Slab Allocator ja PowerPC alams\u00fcsteemide hooldaja, esitles XRAID-i esimest avalikku v\u00e4ljaannet, mis on deklaatseriseeritud RAID, millel on 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\u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c DMA, KVM, Slab Allocator \u0438 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b PowerPC \u0432 \u044f\u0434\u0440\u0435 Linux, \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b \u043f\u0435\u0440\u0432\u044b\u0439 \u043f\u0443\u0431\u043b\u0438\u0447\u043d\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a XRAID, \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0434\u0435\u043a\u043b\u0430\u0441\u0442\u0435\u0440\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e RAID \u0441 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