{"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\/hu\/blog\/news\/obnovlenie-klasternoj-fajlovoj-sistemy-lizardfs-3-13-0-rc2","title":{"rendered":"A LizardFS 3.13.0-rc2 klaszter f\u00e1jlrendszer friss\u00edt\u00e9se","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Egy \u00e9vnyi csend ut\u00e1n a fejleszt\u00e9sben <noindex><a rel=\"nofollow\" href=\"https:\/\/lizardfs.com\/introduction-to-the-community\/\">\u00fajraindult<\/a><\/noindex> a hibat\u0171r\u0151 elosztott f\u00e1jlrendszer \u00faj \u00e1g\u00e1n <noindex><a rel=\"nofollow\" href=\"https:\/\/lizardfs.org\/\">LizardF 3.13<\/a><\/noindex> \u00e9s <noindex><a rel=\"nofollow\" href=\"https:\/\/lizardfs.com\/version-3-13-0-rc2\/\">megjelent<\/a><\/noindex> a m\u00e1sodik jel\u00f6lt a kiad\u00e1sokban. Nemr\u00e9giben <noindex><a rel=\"nofollow\" href=\"https:\/\/lizardfs.com\/update-on-lizardfs-project\/\">t\u00f6rt\u00e9nt<\/a><\/noindex> a LizardFS-t fejleszt\u0151 c\u00e9g tulajdonosv\u00e1lt\u00e1sa, \u00faj vezet\u0151s\u00e9g ker\u00fclt megv\u00e1laszt\u00e1sra \u00e9s a fejleszt\u0151k is megv\u00e1ltoztak. Az utols\u00f3 k\u00e9t \u00e9vben a projekt elt\u00e1volodott a k\u00f6z\u00f6ss\u00e9gt\u0151l, \u00e9s nem ford\u00edtott r\u00e1 megfelel\u0151 figyelmet, de az \u00faj csapat sz\u00e1nd\u00e9ka, hogy helyre\u00e1ll\u00edtsa a kor\u00e1bbi kapcsolatokat a k\u00f6z\u00f6ss\u00e9ggel \u00e9s szoros egy\u00fcttm\u0171k\u00f6d\u00e9st alak\u00edtson ki vele. A projekt k\u00f3dja C \u00e9s C++ nyelveken \u00edr\u00f3dott \u00e9s <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/lizardfs\/lizardfs\">terjeszt\u00e9sre ker\u00fcl<\/a><\/noindex> a GPLv3 licenc alatt \u00e1ll. <\/p>\n<p>A LizardFS <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.lizardfs.com\/introduction.html\">egy<\/a><\/noindex> elosztott klaszteres f\u00e1jlrendszer, amely lehet\u0151v\u00e9 teszi az adatok k\u00fcl\u00f6nb\u00f6z\u0151 szerverekre val\u00f3 eloszt\u00e1s\u00e1t, de azokhoz val\u00f3 hozz\u00e1f\u00e9r\u00e9st egyetlen nagy part\u00edci\u00f3 form\u00e1j\u00e1ban mutatja be, amelyet a hagyom\u00e1nyos lemezmegoszt\u00e1sokhoz hasonl\u00f3an kezelnek. A LizardFS-sel csatlakoztatott part\u00edci\u00f3n t\u00e1mogatottak a POSIX f\u00e1jlattrib\u00fatumok, ACL, z\u00e1rak, socketek, csatorn\u00e1k, eszk\u00f6zf\u00e1jlok, szimbolikus \u00e9s hard linkek. A rendszernek nincs egyetlen meghib\u00e1sod\u00e1si pontja, minden \u00f6sszetev\u0151 p\u00e1rhuzamos\u00edtva van. T\u00e1mogatott az adatokkal v\u00e9gzett m\u0171veletek p\u00e1rhuzamos\u00edt\u00e1sa (t\u00f6bb kliens egyidej\u0171leg f\u00e9rhet hozz\u00e1 a f\u00e1jlokhoz).<\/p>\n<p>Az \u00fczembiztons\u00e1g biztos\u00edt\u00e1sa \u00e9rdek\u00e9ben az adatokat replik\u00e1kra bontj\u00e1k, amelyeket k\u00fcl\u00f6nb\u00f6z\u0151 csom\u00f3pontok k\u00f6z\u00f6tt osztanak el, tartal\u00e9k m\u00e1solatokkal (t\u00f6bb m\u00e1solat ker\u00fcl elhelyez\u00e9sre k\u00fcl\u00f6nb\u00f6z\u0151 csom\u00f3pontokon), \u2014 a csom\u00f3pontok vagy t\u00e1rol\u00f3k meghib\u00e1sod\u00e1sa eset\u00e9n a rendszer folytatja a m\u0171k\u00f6d\u00e9st az inform\u00e1ci\u00f3 elveszt\u00e9se n\u00e9lk\u00fcl, \u00e9s automatikusan \u00e1thelyezi az adatokat a fennmarad\u00f3 csom\u00f3pontok figyelembev\u00e9tel\u00e9vel. A t\u00e1rol\u00f3 b\u0151v\u00edt\u00e9s\u00e9hez elegend\u0151 \u00faj csom\u00f3pontokat csatlakoztatni an\u00e9lk\u00fcl, hogy le\u00e1ll\u00edtan\u00e1k a szolg\u00e1ltat\u00e1st (a rendszer maga replik\u00e1lja az adatokat az \u00faj szerverekre, \u00e9s a t\u00e1rol\u00f3t az \u00faj szerverek figyelembev\u00e9tel\u00e9vel egyens\u00falyozza ki). Hasonl\u00f3k\u00e9ppen, a klaszter m\u00e9ret\u00e9nek cs\u00f6kkent\u00e9s\u00e9re is lehet\u0151s\u00e9g van \u2013 egyszer\u0171en lekapcsolhat\u00f3k a r\u00e9gi berendez\u00e9sek.<\/p>\n<p>Az adatokat \u00e9s metadatokat k\u00fcl\u00f6n t\u00e1rolj\u00e1k. A m\u0171k\u00f6d\u00e9shez aj\u00e1nlott k\u00e9t master-slave \u00fczemm\u00f3dban m\u0171k\u00f6d\u0151 metadataszerver telep\u00edt\u00e9se, valamint legal\u00e1bb k\u00e9t adatrakt\u00e1roz\u00f3 szerver (chunkserver). Tov\u00e1bbi metadat\u00e1k tartal\u00e9kalkalmass\u00e1g\u00e1hoz log-szerverek alkalmazhat\u00f3k, amelyek nyilv\u00e1ntartj\u00e1k a metadat\u00e1k v\u00e1ltoz\u00e1sait, \u00e9s lehet\u0151v\u00e9 teszik a m\u0171k\u00f6d\u00e9s helyre\u00e1ll\u00edt\u00e1s\u00e1t, ha az \u00f6sszes megl\u00e9v\u0151 metadataszerver k\u00e1rosodik. Minden f\u00e1jl blokkokra (chunk) van felosztva, amelyek m\u00e9rete legfeljebb 64 MB. A blokkok a t\u00e1rol\u00f3szerverek k\u00f6z\u00f6tt a kiv\u00e1lasztott replik\u00e1ci\u00f3s m\u00f3d szerint oszlanak meg: szabv\u00e1nyos (a m\u00e1solatok sz\u00e1m\u00e1nak egy\u00e9rtelm\u0171 meghat\u00e1roz\u00e1sa a k\u00fcl\u00f6nb\u00f6z\u0151 csom\u00f3pontokn\u00e1l, bele\u00e9rtve a konkr\u00e9t k\u00f6nyvt\u00e1rakhoz val\u00f3 hozz\u00e1rendel\u00e9st \u2014 fontos adatok eset\u00e9n a m\u00e1solatok sz\u00e1m\u00e1t meg lehet n\u00f6velni, m\u00edg a l\u00e9nyegtelen adatokn\u00e1l cs\u00f6kkenteni), XOR (RAID5) \u00e9s EC (RAID6).<\/p>\n<p>A t\u00e1rol\u00f3 petab\u00e1jt m\u00e9retig sk\u00e1l\u00e1zhat\u00f3. Az alkalmaz\u00e1si ter\u00fcletek k\u00f6z\u00e9 tartozik az arch\u00edvumok vezet\u00e9se, virtu\u00e1lis g\u00e9pek k\u00e9peinek t\u00e1rol\u00e1sa, multim\u00e9di\u00e1s adatok, biztons\u00e1gi ment\u00e9sek, DRC (Katasztr\u00f3fa-helyre\u00e1ll\u00edt\u00f3 K\u00f6zpont) haszn\u00e1lata \u00e9s t\u00e1rol\u00e1s nagy teljes\u00edtm\u00e9ny\u0171 sz\u00e1m\u00edt\u00e1si klaszterekben. A LizardFS rendk\u00edv\u00fcl magas f\u00e1jlolvas\u00e1si sebess\u00e9get biztos\u00edt b\u00e1rmilyen m\u00e9ret\u0171 f\u00e1jl eset\u00e9n, \u00e9s \u00edr\u00e1skor j\u00f3 teljes\u00edtm\u00e9nyt mutat, amikor nagy \u00e9s k\u00f6zepes f\u00e1jlokat egyben \u00edrnak, ha nincs folyamatos m\u00f3dos\u00edt\u00e1s, intenz\u00edv munka nyitott f\u00e1jlokkal \u00e9s tucatnyi kisebb f\u00e1jl egyedi m\u0171veletekkel.<\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/docs.lizardfs.com\/_images\/lfs.png\"><img decoding=\"async\" alt=\"A LizardFS 3.13.0-rc2 klaszter f\u00e1jlrendszer friss\u00edt\u00e9se\" src=\"\/wp-content\/uploads\/2019\/11\/4218e934b60eb3cfb2194b1f09a02905.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>A f\u00e1jlrendszer saj\u00e1toss\u00e1gai k\u00f6z\u00f6tt megeml\u00edthet\u0151 a pillanatk\u00e9p t\u00e1mogat\u00e1sa, amely a f\u00e1jlok \u00e1llapot\u00e1t t\u00fckr\u00f6zi egy adott id\u0151pontban, \u00e9s a be\u00e9p\u00edtett \u201ekuk\u00e1s\u201d megval\u00f3s\u00edt\u00e1s (a f\u00e1jlok nem t\u00f6rl\u0151dnek azonnal, \u00e9s egy ideig vissza\u00e1ll\u00edthat\u00f3k). A hozz\u00e1f\u00e9r\u00e9st IP-c\u00edm vagy jelsz\u00f3 szerint korl\u00e1tozni lehet (a NFS anal\u00f3gi\u00e1j\u00e1ra). Vannak kv\u00f3t\u00e1k \u00e9s szolg\u00e1ltat\u00e1smin\u0151s\u00e9g-kezel\u00e9si mechanizmusok, amelyek lehet\u0151v\u00e9 teszik a m\u00e9ret \u00e9s s\u00e1vsz\u00e9less\u00e9g korl\u00e1toz\u00e1s\u00e1t bizonyos felhaszn\u00e1l\u00f3i kateg\u00f3ri\u00e1k sz\u00e1m\u00e1ra. Lehet\u0151s\u00e9g van f\u00f6ldrajzilag elosztott t\u00e1rol\u00f3k l\u00e9trehoz\u00e1s\u00e1ra, amelyek szegmensei k\u00fcl\u00f6nb\u00f6z\u0151 adatk\u00f6zpontokban helyezkednek el. <\/p>\n<p>A LizardFS projekt 2013-ban indult, mint forkolt <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/moosefs\/moosefs\">MooseFS<\/a><\/noindex>, \u00e9s els\u0151sorban a Reed-Solomon hibajav\u00edt\u00f3 k\u00f3dok alap\u00fa replik\u00e1ci\u00f3s m\u00f3d jelenl\u00e9t\u00e9vel, a kib\u0151v\u00edtett ACL t\u00e1mogat\u00e1ssal, Windows platformra k\u00e9sz\u00fclt klienssel, tov\u00e1bbi optimaliz\u00e1l\u00e1sokkal (p\u00e9ld\u00e1ul az \u00fcgyf\u00e9l \u00e9s a t\u00e1rol\u00f3szerver egyes\u00edt\u00e9sekor a blokkok lehet\u0151s\u00e9g szerint a jelenlegi csom\u00f3pontb\u00f3l ker\u00fclnek kiad\u00e1sra, m\u00edg a metaadatok a mem\u00f3ri\u00e1ban ker\u00fclnek gyors\u00edt\u00f3t\u00e1raz\u00e1sra), rugalmasabb konfigur\u00e1ci\u00f3s rendszerrel, el\u0151re olvas\u00e1si t\u00e1mogat\u00e1ssal, k\u00f6nyvt\u00e1r kv\u00f3t\u00e1kkal \u00e9s bels\u0151 \u00fajragondol\u00e1sokkal rendelkezik.<\/p>\n<p>A LizardFS 3.13.0 kiad\u00e1s\u00e1t december v\u00e9g\u00e9re tervezik. A LizardFS 3.13 f\u0151 \u00fajdons\u00e1ga, hogy a hibat\u0171r\u00e9s biztos\u00edt\u00e1s\u00e1hoz (a master szerverek \u00e1tv\u00e1lt\u00e1sa hiba eset\u00e9n) konszenzus el\u00e9r\u00e9s\u00e9re szolg\u00e1l\u00f3 algoritmust haszn\u00e1l. <noindex><a rel=\"nofollow\" href=\"https:\/\/raft.github.io\/\">Raft<\/a><\/noindex> (a saj\u00e1t uRaft megval\u00f3s\u00edt\u00e1st haszn\u00e1lj\u00e1k, amelyet kor\u00e1bban kereskedelmi term\u00e9kekben alkalmaztak). Az uRaft haszn\u00e1lata egyszer\u0171s\u00edti a be\u00e1ll\u00edt\u00e1st \u00e9s cs\u00f6kkenti a k\u00e9sleltet\u00e9st hiba helyre\u00e1ll\u00edt\u00e1sa sor\u00e1n, de legal\u00e1bb h\u00e1rom m\u0171k\u00f6d\u0151 csom\u00f3pont sz\u00fcks\u00e9ges, amelyek k\u00f6z\u00fcl az egyik a kv\u00f3rumhoz van felhaszn\u00e1lva. <\/p>\n<p>Tov\u00e1bbi v\u00e1ltoz\u00e1sok: \u00faj kliens a FUSE3 altalapj\u00e1n, hibajav\u00edt\u00f3 probl\u00e9m\u00e1k megold\u00e1sa, az nfs-ganesha plugint C nyelven \u00edrt\u00e1k \u00e1t. A 3.13.0-rc2 friss\u00edt\u00e9sben sz\u00e1mos kritikus hib\u00e1t jav\u00edtottak, amelyek a kor\u00e1bbi 3.13-as tesztkiad\u00e1sokat haszn\u00e1lhatatlann\u00e1 tett\u00e9k (a 3.12-es \u00e1ghoz tartoz\u00f3 jav\u00edt\u00e1sok m\u00e9g nem ker\u00fcltek k\u00f6zz\u00e9t\u00e9telre, \u00e9s a 3.12-r\u0151l 3.13-ra val\u00f3 friss\u00edt\u00e9s tov\u00e1bbra is teljes adatveszt\u00e9st eredm\u00e9nyez).<\/p>\n<p>2020-ban a munka az<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/archive.fosdem.org\/2018\/schedule\/event\/lizardfs\/attachments\/paper\/2458\/export\/events\/attachments\/lizardfs\/paper\/2458\/FOSDEM_SDS_Devroom_Presentation_2018.pdf\">Agama<\/a><\/noindex>, \u00fajonnan teljesen \u00e1t\u00edrt LizardFS mag fejleszt\u00e9s\u00e9re \u00f6sszpontos\u00edt, amely a fejleszt\u0151k \u00e1ll\u00edt\u00e1sa szerint h\u00e1romszoros teljes\u00edtm\u00e9nyn\u00f6veked\u00e9st fog biztos\u00edtani a 3.12-es \u00e1ghoz k\u00e9pest. Az Agama esem\u00e9nyalap\u00fa architekt\u00far\u00e1ra (event driven) v\u00e1lt, aszinkron I\/O-val <noindex><a rel=\"nofollow\" href=\"http:\/\/think-async.com\/\">asio<\/a><\/noindex>, a munka f\u0151k\u00e9nt a felhaszn\u00e1l\u00f3i t\u00e9rben (a kernel cache mechanizmusokt\u00f3l val\u00f3 f\u00fcgg\u0151s\u00e9g cs\u00f6kkent\u00e9s\u00e9re). Kieg\u00e9sz\u00edt\u0151leg \u00faj hibakeres\u0151 alrendszert \u00e9s h\u00e1l\u00f3zati aktivit\u00e1selemz\u0151t fognak javasolni, teljes\u00edtm\u00e9ny automatikus optimaliz\u00e1l\u00f3 t\u00e1mogat\u00e1ssal. <\/p>\n<p>A LizardFS klienshez teljes k\u00f6r\u0171 verzi\u00f3kezel\u00e9s t\u00e1mogat\u00e1s\u00e1t fogj\u00e1k hozz\u00e1adni, amely n\u00f6veli a hibahelyre\u00e1ll\u00edt\u00e1s megb\u00edzhat\u00f3s\u00e1g\u00e1t, megoldja a k\u00fcl\u00f6nb\u00f6z\u0151 kliensek egyes adatokhoz val\u00f3 hozz\u00e1f\u00e9r\u00e9sekor felmer\u00fcl\u0151 probl\u00e9m\u00e1kat, \u00e9s lehet\u0151v\u00e9 teszi a teljes\u00edtm\u00e9ny jelent\u0151s n\u00f6vel\u00e9s\u00e9t. A kliens saj\u00e1t felhaszn\u00e1l\u00f3i t\u00e9rben m\u0171k\u00f6d\u0151 h\u00e1l\u00f3zati alrendszerre ker\u00fcl \u00e1t. Az Agama alap\u00fa LizardFS els\u0151 m\u0171k\u00f6d\u0151 protot\u00edpus\u00e1t 2020 m\u00e1sodik negyed\u00e9v\u00e9re tervezik elk\u00e9sz\u00edteni. Ebben az id\u0151szakban \u00edg\u00e9ret\u00fck szerint az integr\u00e1ci\u00f3s eszk\u00f6z\u00f6k is megval\u00f3sulnak a LizardFS \u00e9s a Kubernetes platform k\u00f6z\u00f6tt.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Forr\u00e1s: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51804\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0433\u043e\u0434\u0438\u0447\u043d\u043e\u0433\u043e \u0437\u0430\u0442\u0438\u0448\u044c\u044f \u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u0432\u043e\u0437\u043e\u0431\u043d\u043e\u0432\u0438\u043b\u0430\u0441\u044c \u0440\u0430\u0431\u043e\u0442\u0430 \u043d\u0430\u0434 \u043d\u043e\u0432\u043e\u0439 \u0432\u0435\u0442\u043a\u043e\u0439 \u043e\u0442\u043a\u0430\u0437\u043e\u0443\u0441\u0442\u043e\u0439\u0447\u0438\u0432\u043e\u0439 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u043e\u0439 \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b LizardF 3.13 \u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u0442\u043e\u0440\u043e\u0439 \u043a\u0430\u043d\u0434\u0430\u0434\u0430\u0442 \u0432 \u0440\u0435\u043b\u0438\u0437\u044b. \u041d\u0435\u0434\u0430\u0432\u043d\u043e \u043f\u0440\u043e\u0438\u0437\u043e\u0448\u043b\u0430 \u0441\u043c\u0435\u043d\u0430 \u0432\u043b\u0430\u0434\u0435\u043b\u044c\u0446\u0435\u0432 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0435\u0439 LizardFS, \u0431\u044b\u043b\u043e \u043f\u0440\u0438\u043d\u044f\u0442\u043e \u043d\u043e\u0432\u043e\u0435 \u0440\u0443\u043a\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u043e \u0438 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