{"id":109017,"date":"2023-06-19T15:10:24","date_gmt":"2023-06-19T13:10:24","guid":{"rendered":"https:\/\/prohoster.info\/?p=109017"},"modified":"2023-06-21T11:07:42","modified_gmt":"2023-06-21T09:07:42","slug":"prodvizhenie-bcachefs-v-sostav-yadra-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/prodvizhenie-bcachefs-v-sostav-yadra-linux","title":{"rendered":"Bcachefsi edendamine Linuxi kernelisse","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Kent Overstreet, autori Linuxi tuumudes SSD-\u00fchenduste vahem\u00e4lu s\u00fcsteemile BCache, jagas oma k\u00f5nes LSFMM 2023 (Linuxi salvestus, failis\u00fcsteem, m\u00e4lu haldamine ja BPF tippkohtumine) Bcachefsi failis\u00fcsteemi arenduse tulemusi ja edasisi plaane. Mai kuus esitati vaatlusele ja p\u00f5hituumasse kaasamiseks uuendatud pat\u0161ide kogum Bcachefsi failis\u00fcsteemi rakendamiseks. Bcachefsi failis\u00fcsteem on arenenud juba umbes 10 aastat. Bcachefsi rakenduse \u00fclevaatamise valmidusest teavitati juba 2020. aasta l\u00f5pus ning praegustes pat\u0161ides on arvesse v\u00f5etud varasemate \u00fclevaatuste m\u00e4rkuseid ja puudusi. <\/p>\n

Bcachefsi arendamise eesm\u00e4rk on saavutada XFS-i tasemel j\u00f5udlus, usaldusv\u00e4\u00e4rsus ja skaleeritavus, pakkudes samas t\u00e4iendavaid v\u00f5imalusi, mis on iseloomulikud Btrfs-ile ja ZFS-ile, nagu mitme seadme lisamine osasse, mitmekihilised ketta paigutused, peegeldamine (RAID 1\/10), vahem\u00e4lumine, andmete l\u00e4bipaistv compressioon (LZ4, gzip ja ZSTD re\u017eiimid), oleku l\u00f5iked (snapshot'id), terviklikkuse kontrollimine kontrollsummade abil, Reed-Salomoni koodide (RAID 5\/6) salvestamise v\u00f5imalus, teabe salvestamine kr\u00fcptitud kujul (kasutatakse ChaCha20 ja Poly1305). J\u00f5udluse osas \u00fcletab Bcachefs Btrfsi ja teisi Copy-on-Write mehhanismiga faile ning demonstreerib kiirus, mis on sarnane Ext4 ja XFS-iga. <\/p>\n

Bcachefsi arenduste viimasest edust on m\u00e4rgitud stabiilsuse saavutamist kirjutamiseks saadaval olevate snapshots'ide rakenduses. V\u00f5rreldes Btrfsi snapshots'idega on Bcachefsi omad n\u00fc\u00fcd m\u00e4rkimisv\u00e4\u00e4rselt paremini skaleeritavad ja vabad Btrfsile iseloomulikest probleemidest. Praktikas on snapshots'ide kasutus testitud MySQL varundamise korraldamisel. Bcachefsis on samuti tehtud palju t\u00f6\u00f6d skaleeritavuse parandamiseks \u2014 failis\u00fcsteem on h\u00e4sti toiminud 100 TB suurustes salvestuskohtades ning Bcachefsi rakendamine 1 PB suuruses salvestusruumis on ootel. Lisatud on uus nocow re\u017eiim, et v\u00e4lja l\u00fclitada \u201ecopy-on-write\u201c mehhanism (nocow). Suve jooksul on plaanis viia stabiilsesse olekusse vigade parandamise koodide ja RAIDZ rakendamine ning lahendada m\u00e4lukasutuse probleemid FS taastamisel ja kontrollimisel fsck utiliidiga. <\/p>\n

Tuleviku plaanides mainitakse soovi kasutada Bcachefsi arendamisel programmeerimiskeelt Rust. Bcachefsi autori arvates meeldib talle programmeerida, mitte koodi siluda, ja n\u00fc\u00fcd on meeletu kirjutada koodi keeles C, kui on saadaval parem variant. Rusti kasutatakse juba Bcachefssis m\u00f5nede kasutajaruumi k\u00e4ivitatavate utiliitide rakendamisel. Veelgi enam, plaan on j\u00e4rk-j\u00e4rgult Bcachefs t\u00e4ielikult Rustis \u00fcmber kirjutada, kuna selle keele kasutamine s\u00e4\u00e4stab oluliselt silumise aega. <\/p>\n

Mis osas Bcachefsi edendamisest Linuxi tuuma p\u00f5hikoosseisu, v\u00f5ib heakskiitmine venida, kuna muudatused on piisavalt suured (2500 pat\u0161i ja umbes 90 tuhat rida koodi), mida on raske \u00fcle vaadata. \u00dclevaatamise kiirendamiseks on m\u00f5ned arendajad pakkunud pat\u0161iseeria jagamist v\u00e4iksemateks ja loogiliselt eristatavateks osadeks. Arutelu k\u00e4igus m\u00e4rkisid m\u00f5ned osalejad ka seda, et projekti arendab \u00fcks arendaja, mis toob endaga ohu, et kood v\u00f5ib j\u00e4\u00e4da hoolduseta, juhul kui arendajaga juhtub midagi (projekti vastu on huvi \u00fcles n\u00e4idanud kaks Red Hati t\u00f6\u00f6tajat, kuid nende t\u00f6\u00f6 piirdub seni vigade parandamisega). <\/p>\n

Bcachefs areneb arengatakse tehnoloogiate p\u00f5hjal, mis on juba katsetatud Bcache bloki seadmestiku arendamisel, mis on m\u00f5eldud aeglaste k\u00f5vaketaste juurdep\u00e4\u00e4su kiirete SSD-de kaudu vahem\u00e4llu salvestamiseks (on tuumas alates versioonist 3.10). Bcachefs kasutab Copy-on-Write (COW) mehhanismi, kus muudatused ei too kaasa andmete \u00fcle kirjutamist \u2014 uus olek salvestatakse uude kohta ning seej\u00e4rel muudetakse kehtiva oleku viidet. <\/p>\n

Bcachefsi erip\u00e4ra on mitmekihiline salvestusseadmese \u00fchendamise tugi, kus salvestus koosneb mitmest kihist \u2014 alumine kiht on \u00fchendatud k\u00f5ige kiiremate seadmetega (SSD), mida kasutatakse sageli kasutatavate andmete vahem\u00e4llu salvestamiseks, ning \u00fclemine kiht koosneb mahukamatest ja odavamatest k\u00f5vaketastest, mis tagavad v\u00e4hem n\u00f5utud andmete salvestamise. Kihtide vahel v\u00f5ib olla vaikimisi kirjutamisega vahem\u00e4lu (writeback). Seadmeid saab d\u00fcnaamiliselt lisada ja eraldada eraldamisest s\u00f5ltumatult, t\u00f5kestamata failis\u00fcsteemi kasutamist (andmed migriseeruvad automaatselt).
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u0435\u043d\u0442 \u041e\u0432\u0435\u0440\u0441\u0442\u0440\u0438\u0442 (Kent Overstreet), \u0430\u0432\u0442\u043e\u0440 \u0432\u0445\u043e\u0434\u044f\u0449\u0435\u0439 \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 \u044f\u0434\u0440\u0430 Linux \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0431\u043b\u043e\u0447\u043d\u044b\u0445 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 \u043d\u0430 SSD-\u043d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u044f\u0445 BCache, \u0432 \u0441\u0432\u043e\u0451\u043c \u0432\u044b\u0441\u0442\u0443\u043f\u043b\u0435\u043d\u0438\u0438 \u043d\u0430 \u043a\u043e\u043d\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u0438 LSFMM 2023 (Linux Storage, Filesystem, Memory Management & BPF Summit) \u043e\u0431\u043e\u0431\u0449\u0438\u043b \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u0440\u0430\u0431\u043e\u0442\u044b \u043f\u043e \u043f\u0440\u043e\u0434\u0432\u0438\u0436\u0435\u043d\u0438\u044e \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Bcachefs \u0432 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0441\u043e\u0441\u0442\u0430\u0432 \u044f\u0434\u0440\u0430 Linux \u0438 \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u0430\u043b \u043e \u043f\u043b\u0430\u043d\u0430\u0445 \u043f\u043e \u0434\u0430\u043b\u044c\u043d\u0435\u0439\u0448\u0435\u043c\u0443 \u0440\u0430\u0437\u0432\u0438\u0442\u0438\u044e \u0434\u0430\u043d\u043d\u043e\u0439 \u0424\u0421. \u0412 […]<\/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-109017","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\udd47Bcachefs'i edendamine Linuxi tuumas | ProHoster","description":"Kent Overstreet, SSD-filtrite BCache'i sisemooduli autor, esitles oma ettekandes LSFMM 2023 (Linuxi salvestus-, failis\u00fcsteemi, m\u00e4luhalduse ja BPF kohtumine) Bcachefs-failis\u00fcsteemi edendamise tulemusi Linuxi p\u00f5hituumas ja r\u00e4\u00e4kis tuleviku plaanidest selle failis\u00fcsteemi edendamiseks.","canonical_url":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/prodvizhenie-bcachefs-v-sostav-yadra-linux","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"et_EE","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\u041f\u0440\u043e\u0434\u0432\u0438\u0436\u0435\u043d\u0438\u0435 Bcachefs \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 \u044f\u0434\u0440\u0430 Linux | ProHoster","og:description":"\u041a\u0435\u043d\u0442 \u041e\u0432\u0435\u0440\u0441\u0442\u0440\u0438\u0442 (Kent Overstreet), \u0430\u0432\u0442\u043e\u0440 \u0432\u0445\u043e\u0434\u044f\u0449\u0435\u0439 \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 \u044f\u0434\u0440\u0430 Linux \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0431\u043b\u043e\u0447\u043d\u044b\u0445 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 \u043d\u0430 SSD-\u043d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u044f\u0445 BCache, \u0432 \u0441\u0432\u043e\u0451\u043c \u0432\u044b\u0441\u0442\u0443\u043f\u043b\u0435\u043d\u0438\u0438 \u043d\u0430 \u043a\u043e\u043d\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u0438 LSFMM 2023 (Linux Storage, Filesystem, Memory Management & BPF Summit) \u043e\u0431\u043e\u0431\u0449\u0438\u043b \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u0440\u0430\u0431\u043e\u0442\u044b \u043f\u043e \u043f\u0440\u043e\u0434\u0432\u0438\u0436\u0435\u043d\u0438\u044e \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Bcachefs \u0432 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