{"id":34664,"date":"2019-10-31T21:59:41","date_gmt":"2019-10-31T18:59:41","guid":{"rendered":"https:\/\/prohoster.info\/blog\/zfsonlinux-0-8-fichi-stabilizatsiya-intrigi-nu-i-trim\/"},"modified":"2019-10-31T21:59:41","modified_gmt":"2019-10-31T18:59:41","slug":"zfsonlinux-0-8-fichi-stabilizatsiya-intrigi-nu-i-trim","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/zfsonlinux-0-8-fichi-stabilizatsiya-intrigi-nu-i-trim","title":{"rendered":"ZFSonLinux 0.8: funzioni, stabilizzazione, intrighi. E anche trim","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Recentemente \u00e8 stata rilasciata una nuova versione stabile di ZFSonLinux, un progetto che ora \u00e8 centrale nel mondo dello sviluppo di OpenZFS. Addio OpenSolaris, benvenuto feroce mondo Linux incompatibile GPL-CDDL.<\/p>\n<p><img decoding=\"async\" alt=\"ZFSonLinux 0.8: funzioni, stabilizzazione, intrighi. E anche trim\" src=\"\/wp-content\/uploads\/2019\/05\/f3b649ec9ba25f020faa38eef874e637.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nDi seguito un'analisi delle cose pi\u00f9 interessanti (non pu\u00f2 mancare, <u>2200<\/u> commits!), e per finire, un po' di suspence.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h3>Nuove funzionalit\u00e0<\/h3>\n<p>\nNaturalmente, la pi\u00f9 attesa \u00e8 <b>la crittografia nativa<\/b>. Ora \u00e8 possibile crittografare solo i dataset necessari grazie alla crittografia integrata in ZFS e (a mio avviso \u2014 cosa principale) \u2014 \u00e8 possibile inviare dati crittografati attraverso <i>zfs send<\/i> e CONTROLLARE l'integrit\u00e0 dei dati senza decrittografare utilizzando gli strumenti integrati, tutte le funzionalit\u00e0 per garantire l'integrit\u00e0 dei dati ZFS saranno a tua disposizione!<\/p>\n<p>In secondo luogo, \u00e8 importante menzionare il tanto atteso <b>TRIM<\/b>. \u0414\u0430, \u043e\u043d \u043e\u0447\u0435\u043d\u044c \u0434\u043e\u043b\u0433\u043e \u0434\u043e\u0431\u0438\u0440\u0430\u043b\u0441\u044f \u0434\u043e \u043f\u0440\u043e\u0434\u0430\u043a\u0448\u0435\u043d\u0430. \u041e\u0442\u0447\u0430\u0441\u0442\u0438 \u043f\u043e\u0442\u043e\u043c\u0443, \u0447\u0442\u043e \u0434\u043b\u044f CoW \u0444\u0430\u0439\u043b\u043e\u0432\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043d\u0435 \u0442\u0430\u043a \u043a\u0440\u0438\u0442\u0438\u0447\u043d\u0430 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0441 \u0438\u0437\u043d\u043e\u0441\u043e\u043c SSD. \u041d\u043e \u0442\u0435\u043f\u0435\u0440\u044c \u043c\u044b \u0432\u0441\u0435 \u0441\u043f\u043e\u043a\u043e\u0439\u043d\u044b &#8212;<i> zpool trim <\/i>salver\u00e0 i nostri delicati flash.<\/p>\n<p>Ora \u00e8 possibile <b>eliminare<\/b> array vdev aggiunti per errore dal pool (ma solo se si tratta di sparse o mirror). Un'utile novit\u00e0.<\/p>\n<p>Proseguendo nella nostra classifica \u2014 <b>checkpoint del pool<\/b>. Brevemente \u2014 snapshot per l'intero stato del pool, MA che consentono di annullare non solo le modifiche ai dati, ma anche le features attivate nel pool e le modifiche alla struttura. Un'altra possibilit\u00e0 per garantire la sicurezza.<\/p>\n<p><b>Inizializzazione del pool <\/b> \u2014 riempimento dello storage sottostante con zeri. Utile per lavorare in ambienti con dischi thin provisioned per un'esplicita allocazione dello spazio ed evitare cali di prestazioni inaspettati in seguito.<\/p>\n<p><b>Contabilit\u00e0 di progetto e quota<\/b> \u2014 nel meccanismo di quota esistente ora \u00e8 possibile utilizzare la suddivisione per progetti.<\/p>\n<p><b>Programmi canale<\/b> \u2014 la possibilit\u00e0 di eseguire compiti amministrativi in modo atomico tramite script Lua. Ci sono limiti sul tempo di esecuzione e sulla memoria. Se ti occupi di automazione \u2014 questo \u00e8 per te.<\/p>\n<p><b>Direct IO<\/b> \u2014 per semplificare abbiamo attivato il lavoro Direct IO, all'interno nulla \u00e8 cambiato (semplicemente le chiamate vanno il pi\u00f9 possibile oltre la cache), tuttavia ora il software desideroso di operare in questa modalit\u00e0 non avr\u00e0 problemi.<\/p>\n<p>Progetto <b>Pyzfs<\/b> integrato nel repository principale e preso sotto l'ala del progetto ZFSonLinux. Ora ci sono pi\u00f9 strumenti di gestione disponibili da Python (e sar\u00e0 pi\u00f9 tranquillo per il supporto del modulo). Inoltre, molti script Python sono stati adattati per Python3.<\/p>\n<h4>E ora il gusto \u2014 prestazioni<\/h4>\n<p>\nDurante le operazioni di scrub e resilver, ora vengono prima letti i metadati e solo dopo, nel modo massimo <b>sequenziale<\/b> \u2014 i dati. Questo permette il ripristino dell'array e il controllo dell'integrit\u00e0 a massima velocit\u00e0.<\/p>\n<p><b>Classi di allocazione<\/b> \u2014 nei vdev degli array \u00e8 stata introdotta una tipologia di supporti; ora \u00e8 possibile separare lo storage di metadati\/tabelle di deduplicazione (DDT)\/blocchi di dati inferiori a X KB in un array vdev separato, da dischi pi\u00f9 performanti. <u>Pi\u00f9 velocit\u00e0 a Dio della velocit\u00e0!<\/u> (e in effetti \u2014 questa funzionalit\u00e0 sar\u00e0 molto utile nel prossimo <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/zfsonlinux\/zfs\/pull\/8016\">DRAID<\/a><\/noindex>).<\/p>\n<p>Molti comandi di amministrazione ora funzionano pi\u00f9 velocemente grazie alla cache puntuale dei metadati (ad esempio, <i>zfs list, zfs get<\/i>).<\/p>\n<p>Il processo di allocazione dei dati <b>\u00e8 parallelizzato<\/b>, ora per ogni sezione di spazio libero (metaslab) vengono creati diversi allocatori. Con NVME certamente non si potr\u00e0 spremere tutto, ma sar\u00e0 migliore.<\/p>\n<p><b>Il ripristino dell'integrit\u00e0<\/b> dell'array permetter\u00e0 di non sovraccaricare l'array con la ricostruzione simultanea di pi\u00f9 dischi, ma avverr\u00e0 in modo sequenziale. Questo ridurr\u00e0 l'impatto sulle prestazioni e il tempo di ricostruzione.<\/p>\n<p>Durante l'importazione dei pool <b>con un gran numero di volumi<\/b> accelerata la registrazione nel sistema.<\/p>\n<p>Inoltre <b>QAT<\/b> ora consente di esportare il calcolo della crittografia e dei checksum.<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/zfsonlinux\/zfs\/releases\/tag\/zfs-0.8.0\">In aggiunta, un sacco di piccole modifiche (del resto, oltre 2000 commit nella release!).<\/a><\/noindex><\/p>\n<h3>E per finire, le intrighe<\/h3>\n<p>\n\u0425\u043e\u0442\u044f ZFSonLinux \u043e\u043f\u0435\u0440\u0430\u0442\u0438\u0432\u043d\u043e \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u0442 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u0441\u0432\u0435\u0436\u0438\u0445 \u044f\u0434\u0435\u0440 Linux (\u0441\u0435\u0439\u0447\u0430\u0441 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u044e\u0442\u0441\u044f \u0432\u0435\u0440\u0441\u0438\u0438 2.6.32 \u2014 5.1*), \u043c\u0435\u0439\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u044b \u044f\u0434\u0440\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u044e\u0442 \u044f\u0432\u043d\u0443\u044e \u043d\u0435\u0437\u0430\u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043e\u0432\u0430\u043d\u043d\u043e\u0441\u0442\u044c \u0432 \u043f\u043e\u043c\u043e\u0449\u0438 \u0441\u0442\u043e\u0440\u043e\u043d\u043d\u0438\u043c \u043c\u043e\u0434\u0443\u043b\u044f\u043c (&#171;<noindex><a rel=\"nofollow\" href=\"https:\/\/lkml.org\/lkml\/2019\/5\/22\/233\">&#8230;we do not care at all about<br \/>\nexternal kernel modules&#8230;<\/a><\/noindex> \u2014 greg k-h&#187;). \u0422\u0430\u043a, \u0442\u0440\u0435\u0431\u0443\u0435\u043c\u044b\u0435 \u0434\u043b\u044f \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0439 \u0440\u0430\u0431\u043e\u0442\u044b \u0432\u044b\u0437\u043e\u0432\u044b \u044f\u0434\u0440\u0430 \u0432 \u0432\u0435\u0442\u043a\u0435 5.0 <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/torvalds\/linux\/commit\/12209993e98c5fa1855c467f22a24e3d5b8be205\">sono state modificate in GPL-only <\/a><\/noindex>. Nei kernel con questa patch, le performance di ZFS saranno notevolmente inferiori. A salvare la situazione, il fatto che questa funzionalit\u00e0 pu\u00f2 essere implementata dal lato del modulo, il che probabilmente verr\u00e0 fatto. Nel frattempo, potete prendere come esempio NixOS \u2014 loro <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/NixOS\/nixpkgs\/pull\/61076\">hanno semplicemente fatto il rollback della patch nel kernel<\/a><\/noindex> \ud83d\ude42<\/p>\n<p>\u00c8 stato inoltre introdotto un Code of Conduct nel progetto, il che ha generato una serie di controversie. Ma abbiamo resistito \ud83d\ude42<\/p>\n<p>A tutti backup funzionanti e release stabili!<\/p>\n<p>Link utili:<br \/>\n \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/zfsonlinux\/zfs\/releases\/tag\/zfs-0.8.0\">release su Github<\/a><\/noindex><br \/>\n \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/en\/post\/314506\/\">la mia introduzione a ZFS<\/a><\/noindex><br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/453400\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0411\u0443\u043a\u0432\u0430\u043b\u044c\u043d\u043e \u043d\u0430 \u0434\u043d\u044f\u0445 \u0440\u0435\u043b\u0438\u0437\u043d\u0443\u043b\u0438 \u0441\u0432\u0435\u0436\u0443\u044e stable \u0432\u0435\u0440\u0441\u0438\u044e ZFSonLinux, \u043f\u0440\u043e\u0435\u043a\u0442\u0430, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0442\u0435\u043f\u0435\u0440\u044c \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0446\u0435\u043d\u0442\u0440\u0430\u043b\u044c\u043d\u044b\u043c \u0432 \u043c\u0438\u0440\u0435 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 OpenZFS. \u041f\u0440\u043e\u0449\u0430\u0439, OpenSolaris, \u0437\u0434\u0440\u0430\u0432\u0441\u0442\u0432\u0443\u0439 \u0441\u0432\u0438\u0440\u0435\u043f\u044b\u0439 GPL-CDDL \u043d\u0435\u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u044b\u0439 \u043c\u0438\u0440 Linux. \u041f\u043e\u0434 \u043a\u0430\u0442\u043e\u043c \u043e\u0431\u0437\u043e\u0440 \u0441\u0430\u043c\u044b\u0445 \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u044b\u0445 \u0432\u0435\u0449\u0435\u0439 (\u0435\u0449\u0451 \u0431\u044b, 2200 \u043a\u043e\u043c\u043c\u0438\u0442\u043e\u0432!), \u0430 \u043d\u0430 \u0434\u0435\u0441\u0435\u0440\u0442 \u2014 \u043d\u0435\u043c\u043d\u043e\u0433\u043e \u0438\u043d\u0442\u0440\u0438\u0433. \u041d\u043e\u0432\u044b\u0435 \u0444\u0438\u0448\u043a\u0438 \u041a\u043e\u043d\u0435\u0447\u043d\u043e \u0436\u0435, \u0441\u0430\u043c\u0430\u044f \u043e\u0436\u0438\u0434\u0430\u0435\u043c\u0430\u044f \u2014 \u043d\u0430\u0442\u0438\u0432\u043d\u043e\u0435 \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u0438\u0435. \u0422\u0435\u043f\u0435\u0440\u044c \u043c\u043e\u0436\u043d\u043e \u0437\u0430\u0448\u0438\u0444\u0440\u043e\u0432\u0430\u0442\u044c \u0442\u043e\u043b\u044c\u043a\u043e \u043d\u0443\u0436\u043d\u044b\u0435 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":26117,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-34664","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta 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