{"id":52513,"date":"2019-11-10T00:00:00","date_gmt":"2019-11-09T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/obnovlenie-klasternoj-fajlovoj-sistemy-lizardfs-3-13-0-rc2"},"modified":"2020-02-18T14:00:15","modified_gmt":"2020-02-18T11:00:15","slug":"obnovlenie-klasternoj-fajlovoj-sistemy-lizardfs-3-13-0-rc2","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/obnovlenie-klasternoj-fajlovoj-sistemy-lizardfs-3-13-0-rc2","title":{"rendered":"Aktualizace clusterov\u00e9ho souborov\u00e9ho syst\u00e9mu LizardFS 3.13.0-rc2","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Po ro\u010dn\u00edm \u00fatlumu ve v\u00fdvoji bylo obnoveno<\/a><\/noindex> pracovn\u00ed \u00fasil\u00ed na nov\u00e9 v\u011btvi vysoce dostupn\u00e9ho distribuovan\u00e9ho souborov\u00e9ho syst\u00e9mu LizardF 3.13<\/a><\/noindex> a byla vyd\u00e1na<\/a><\/noindex> druh\u00fd kandid\u00e1t na vyd\u00e1n\u00ed. Ned\u00e1vno nastalo<\/a><\/noindex> do\u0161lo ke zm\u011bn\u011b vlastn\u00edk\u016f spole\u010dnosti, kter\u00e1 vyv\u00edj\u00ed LizardFS, nov\u00e9 veden\u00ed p\u0159ijalo nov\u00e9 v\u00fdvoj\u00e1\u0159e. Posledn\u00ed dva roky se projekt vzd\u00e1lil od komunity a nev\u011bnoval j\u00ed dostate\u010dnou pozornost, ale nov\u00fd t\u00fdm m\u00e1 v \u00famyslu o\u017eivit d\u0159\u00edv\u011bj\u0161\u00ed vztahy s komunitou a nav\u00e1zat s n\u00ed \u00fazkou spolupr\u00e1ci. Zdrojov\u00fd k\u00f3d projektu je naps\u00e1n v jazyc\u00edch C a C++ a distribuov\u00e1no<\/a><\/noindex> je licencov\u00e1n pod GPLv3. <\/p>\n

LizardFS je<\/a><\/noindex> je distribuovan\u00fd clusterov\u00fd souborov\u00fd syst\u00e9m, kter\u00fd umo\u017e\u0148uje rozlo\u017eit data na r\u016fzn\u00e9 servery, ale p\u0159edstavit k nim p\u0159\u00edstup jako k jednomu velk\u00e9mu odd\u00edlu, jeho\u017e vyu\u017eit\u00ed je analogick\u00e9 tradi\u010dn\u00edm diskov\u00fdm odd\u00edl\u016fm. V p\u0159ipojen\u00e9m odd\u00edlu s LizardFS jsou podporov\u00e1ny POSIX atributy soubor\u016f, ACL, z\u00e1mky, sockety, kan\u00e1ly, za\u0159\u00edzen\u00ed, symbolick\u00e9 a tvrd\u00e9 odkazy. Syst\u00e9m nem\u00e1 jedinou chybnou \u010d\u00e1st, v\u0161echny komponenty jsou redundantn\u00ed. Podporuje zpracov\u00e1n\u00ed dat ve v\u00edce vl\u00e1knech (v\u00edce klient\u016f m\u016f\u017ee sou\u010dasn\u011b p\u0159istupovat k soubor\u016fm).<\/p>\n

Pro zaji\u0161t\u011bn\u00ed odolnosti proti selh\u00e1n\u00ed jsou data rozd\u011blena na repliky, kter\u00e9 jsou rozlo\u017eeny po r\u016fzn\u00fdch uzlech s redundanc\u00ed (na r\u016fzn\u00fdch uzlech se nach\u00e1z\u00ed n\u011bkolik kopi\u00ed). V p\u0159\u00edpad\u011b selh\u00e1n\u00ed uzl\u016f nebo disk\u016f syst\u00e9m pokra\u010duje v \u010dinnosti bez ztr\u00e1ty informac\u00ed a automaticky redistribuuje data s ohledem na zb\u00fdvaj\u00edc\u00ed uzly. Pro roz\u0161\u00ed\u0159en\u00ed \u00falo\u017ei\u0161t\u011b sta\u010d\u00ed p\u0159ipojit k n\u011bmu nov\u00e9 uzly bez zastaven\u00ed provozu na \u00fadr\u017ebu (syst\u00e9m s\u00e1m replikovuje \u010d\u00e1st dat na nov\u00e9 servery a vyv\u00e1\u017e\u00ed \u00falo\u017ei\u0161t\u011b s ohledem na nov\u00e9 servery). Podobn\u011b lze postupovat i p\u0159i zmen\u0161ov\u00e1n\u00ed velikosti clusteru \u2014 jednodu\u0161e odpojit zastaral\u00e9 vybaven\u00ed.<\/p>\n

Data a metadata jsou ulo\u017eena odd\u011blen\u011b. Pro provoz se doporu\u010duje instalovat dva servery pro metadata, kter\u00e9 pracuj\u00ed v re\u017eimu master-slave, a tak\u00e9 alespo\u0148 dva servery pro ukl\u00e1d\u00e1n\u00ed dat (chunkserver). Nav\u00edc pro z\u00e1lohov\u00e1n\u00ed metadat mohou b\u00fdt pou\u017eity log-servery, kter\u00e9 uchov\u00e1vaj\u00ed informace o zm\u011bn\u00e1ch metadat a umo\u017e\u0148uj\u00ed obnovit provoz v p\u0159\u00edpad\u011b po\u0161kozen\u00ed v\u0161ech dostupn\u00fdch server\u016f pro metadata. Ka\u017ed\u00fd soubor je rozd\u011blen na bloky (chunk) o velikosti a\u017e 64 MB. Bloky jsou rozlo\u017eeny na servery ukl\u00e1d\u00e1n\u00ed podle zvolen\u00e9ho re\u017eimu replikace: standardn\u00ed (explicitn\u00ed ur\u010den\u00ed po\u010dtu kopi\u00ed ur\u010den\u00fdch k um\u00edst\u011bn\u00ed na r\u016fzn\u00e9 uzly, v\u010detn\u011b vazby na jednotliv\u00e9 adres\u00e1\u0159e \u2014 pro d\u016fle\u017eit\u00e1 data lze zv\u00fd\u0161it po\u010det kopi\u00ed a pro m\u00e9n\u011b d\u016fle\u017eit\u00e1 sn\u00ed\u017eit), XOR (RAID5) a EC (RAID6).<\/p>\n

\u00dalo\u017ei\u0161t\u011b m\u016f\u017ee \u0161k\u00e1lovat do petabajtov\u00fdch rozm\u011br\u016f. Mezi oblasti pou\u017eit\u00ed pat\u0159\u00ed spr\u00e1va archiv\u016f, uchov\u00e1v\u00e1n\u00ed obraz\u016f virtu\u00e1ln\u00edch stroj\u016f, multimedi\u00e1ln\u00edch dat, z\u00e1loh, pou\u017eit\u00ed jako DRC (Disaster Recovery Center) a jako \u00falo\u017ei\u0161t\u011b ve clusterech vysoce v\u00fdkonn\u00fdch v\u00fdpo\u010dt\u016f. LizardFS poskytuje velmi vysokou rychlost \u010dten\u00ed soubor\u016f libovoln\u00e9 velikosti, a p\u0159i z\u00e1pisu vykazuje dobrou v\u00fdkonnost p\u0159i z\u00e1pisu cel\u00fdch velk\u00fdch a st\u0159edn\u00edch soubor\u016f, kdy nedoch\u00e1z\u00ed k trval\u00fdm modifikac\u00edm, intenzivn\u00ed pr\u00e1ci s otev\u0159en\u00fdmi soubory a jednor\u00e1zov\u00fdm operac\u00edm s mno\u017estv\u00edm drobn\u00fdch soubor\u016f.<\/p>\n

\"Aktualizace<\/a><\/noindex><\/center><\/p>\n

Mezi vlastnostmi FS lze tak\u00e9 zm\u00ednit podporu snapshot\u016f, kter\u00e9 odr\u00e1\u017eej\u00ed stav soubor\u016f k ur\u010dit\u00e9mu okam\u017eiku, a vestav\u011bnou implementaci \u201eko\u0161e\u201c (soubory nejsou okam\u017eit\u011b vymaz\u00e1ny a n\u011bjakou dobu jsou dostupn\u00e9 pro obnoven\u00ed). P\u0159\u00edstup k odd\u00edlu m\u016f\u017ee b\u00fdt omezen podle IP adresy nebo hesla (podobn\u011b jako u NFS). Existuj\u00ed mechanismy pro kv\u00f3ty a \u0159\u00edzen\u00ed kvality slu\u017eby, kter\u00e9 umo\u017e\u0148uj\u00ed omezit velikost a propustnost pro n\u011bkter\u00e9 u\u017eivatelsk\u00e9 kategorie. Je mo\u017en\u00e9 vytv\u00e1\u0159en\u00ed geograficky distribuovan\u00fdch \u00falo\u017ei\u0161\u0165, jejich\u017e segmenty jsou um\u00edst\u011bny v r\u016fzn\u00fdch datov\u00fdch centrech. <\/p>\n

Projekt LizardFS byl zalo\u017een v roce 2013 jako fork MooseFS<\/a><\/noindex>, a li\u0161\u00ed se p\u0159edev\u0161\u00edm p\u0159\u00edtomnost\u00ed replikace zalo\u017een\u00e9 na k\u00f3dech pro opravu chyb Reed-Solomon (analog raidzN), roz\u0161\u00ed\u0159enou podporou ACL, klientem pro platformu Windows, dal\u0161\u00edmi optimalizacemi (nap\u0159\u00edklad p\u0159i kombinaci klienta a \u00falo\u017en\u00e9ho serveru jsou bloky, pokud mo\u017eno, poskytov\u00e1ny z aktu\u00e1ln\u00edho uzlu, zat\u00edmco metadata jsou ukl\u00e1d\u00e1na do cache v pam\u011bti), flexibiln\u011bj\u0161\u00edm syst\u00e9mem nastaven\u00ed, podporou p\u0159edb\u011b\u017en\u00e9ho \u010dten\u00ed dat, kv\u00f3tami na adres\u00e1\u0159e a intern\u00edmi vylep\u0161en\u00edmi.<\/p>\n

Vyd\u00e1n\u00ed LizardFS 3.13.0 je pl\u00e1nov\u00e1no na konec prosince. Hlavn\u00ed novinkou LizardFS 3.13 je vyu\u017eit\u00ed algoritmu pro dosa\u017een\u00ed konsensu pro zaji\u0161t\u011bn\u00ed odolnosti proti v\u00fdpadk\u016fm (p\u0159epnut\u00ed master server\u016f v p\u0159\u00edpad\u011b poruchy). Raft<\/a><\/noindex> (pou\u017e\u00edv\u00e1 se vlastn\u00ed implementace uRaft, kter\u00e1 byla d\u0159\u00edve vyu\u017e\u00edv\u00e1na v komer\u010dn\u00edch produktech). Pou\u017eit\u00ed uRaft zjednodu\u0161uje nastaven\u00ed a zkracuje prodlevy p\u0159i obnov\u011b po v\u00fdpadku, av\u0161ak vy\u017eaduje alespo\u0148 t\u0159i funk\u010dn\u00ed uzly, z nich\u017e jeden se pou\u017e\u00edv\u00e1 pro kv\u00f3rum. <\/p>\n

Mezi dal\u0161\u00edmi zm\u011bnami: nov\u00fd klient na b\u00e1zi subsyst\u00e9mu FUSE3, \u0159e\u0161en\u00ed probl\u00e9m\u016f s opravou chyb, plugin nfs-ganesha byl p\u0159eps\u00e1n v jazyce C. V aktualizaci 3.13.0-rc2 bylo opraveno n\u011bkolik kritick\u00fdch chyb, kter\u00e9 d\u011blaly p\u0159edchoz\u00ed testovac\u00ed verze v\u011btve 3.13 m\u00e1lo pou\u017eiteln\u00e9 (opravy pro v\u011btev 3.12 zat\u00edm nebyly zve\u0159ejn\u011bny a aktualizace z 3.12 na 3.13 st\u00e1le vede k \u00fapln\u00e9 ztr\u00e1t\u011b dat).<\/p>\n

V roce 2020 se pr\u00e1ce zam\u011b\u0159\u00ed na v\u00fdvoj
\nAgama<\/a><\/noindex>, zcela nov\u00e9ho p\u0159epracovan\u00e9ho j\u00e1dra LizardFS, kter\u00e9, podle tvrzen\u00ed v\u00fdvoj\u00e1\u0159\u016f, zajist\u00ed trojn\u00e1sobn\u00e9 zv\u00fd\u0161en\u00ed v\u00fdkonu oproti v\u011btvi 3.12. V Agama bude proveden p\u0159echod na ud\u00e1lostmi \u0159\u00edzenou architekturu (event driven), asynchronn\u00ed vstup\/v\u00fdstup na b\u00e1zi asio<\/a><\/noindex>, p\u0159i\u010dem\u017e pr\u00e1ce bude p\u0159ev\u00e1\u017en\u011b prob\u00edhat v prostoru u\u017eivatele (pro sn\u00ed\u017een\u00ed z\u00e1vislosti na mechanismech ukl\u00e1d\u00e1n\u00ed do mezipam\u011bti j\u00e1dra). D\u00e1le budou nab\u00eddnuty nov\u00e9 ladic\u00ed subsyst\u00e9my a analyz\u00e1tor s\u00ed\u0165ov\u00e9 aktivity s podporou automatick\u00e9ho lad\u011bn\u00ed v\u00fdkonu. <\/p>\n

Klient LizardFS bude m\u00edt plnou podporu verzionov\u00e1n\u00ed z\u00e1pisov\u00fdch operac\u00ed, co\u017e zv\u00fd\u0161\u00ed spolehlivost obnovy po hav\u00e1rii, vy\u0159e\u0161\u00ed probl\u00e9my, kter\u00e9 vznikaj\u00ed p\u0159i sou\u010dasn\u00e9m p\u0159\u00edstupu r\u016fzn\u00fdch klient\u016f k t\u011bmto dat\u016fm, a umo\u017en\u00ed zna\u010dn\u00e9 zv\u00fd\u0161en\u00ed v\u00fdkonu. Klient bude p\u0159enesen na vlastn\u00ed s\u00ed\u0165ov\u00fd subsyst\u00e9m, kter\u00fd funguje v u\u017eivatelsk\u00e9m prostoru. Prvn\u00ed funk\u010dn\u00ed prototyp LizardFS zalo\u017een\u00fd na Agama bude p\u0159ipraven ve druh\u00e9m \u010dtvrtlet\u00ed 2020. Ve stejn\u00e9m obdob\u00ed se pl\u00e1nuje realizace prost\u0159edk\u016f pro integraci LizardFS s platformou Kubernetes.<\/p>\n

<\/a><\/noindex><\/p>\n

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

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\u043d\u043e\u0432\u0430\u044f \u043a\u043e\u043c\u0430\u043d\u0434\u0430 \u043d\u0430\u043c\u0435\u0440\u0435\u043d\u0430 \u0432\u043e\u0437\u0440\u043e\u0434\u0438\u0442\u044c \u043f\u0440\u0435\u0436\u043d\u0438\u0435 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":52514,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-52513","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\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Aktualizace clusterov\u00e9ho souborov\u00e9ho syst\u00e9mu LizardFS 3.13.0-rc2 | ProHoster","description":"Po ro\u010dn\u00edm \u00fatlumu ve v\u00fdvoji byla obnovena pr\u00e1ce na 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