{"id":103120,"date":"2022-01-28T15:37:51","date_gmt":"2022-01-28T13:37:51","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-rqlite-7-0-raspredelyonnoj-otkazoustojchivoj-subd-na-osnove-sqlite"},"modified":"2022-01-28T15:37:51","modified_gmt":"2022-01-28T13:37:51","slug":"vypusk-rqlite-7-0-raspredelyonnoj-otkazoustojchivoj-subd-na-osnove-sqlite","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/vypusk-rqlite-7-0-raspredelyonnoj-otkazoustojchivoj-subd-na-osnove-sqlite","title":{"rendered":"Az rqlite 7.0, az SQLite alap\u00fa elosztott hibat\u0171r\u0151 adatb\u00e1zis-kezel\u0151 rendszer kiad\u00e1sa","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Megjelent az rqlite 7.0 elosztott adatb\u00e1zis-kezel\u0151 rendszer, amely az SQLite-t haszn\u00e1lja t\u00e1rol\u00f3motorjak\u00e9nt, \u00e9s lehet\u0151v\u00e9 teszi egy szinkroniz\u00e1lt t\u00e1rol\u00f3kb\u00f3l \u00e1ll\u00f3 klaszter m\u0171k\u00f6dtet\u00e9s\u00e9t. Az rqlite saj\u00e1toss\u00e1gai k\u00f6z\u00e9 tartozik a k\u00f6nny\u0171 telep\u00edt\u00e9s, be\u00fczemel\u00e9s \u00e9s fenntart\u00e1s, hasonl\u00f3an az etcd-hez \u00e9s a Consulhoz, de rel\u00e1ci\u00f3s adatkezel\u00e9si modellt haszn\u00e1l kulcs\/\u00e9rt\u00e9k helyett. A projekt k\u00f3dja Go nyelven k\u00e9sz\u00fclt, \u00e9s MIT licenc alatt terjesztik.    <\/p>\n<p>A szinkroniz\u00e1lt \u00e1llapot fenntart\u00e1s\u00e1hoz a Raft konszenzusval\u00f3s\u00edt\u00f3 algoritmust alkalmazz\u00e1k. Az rqlite az eredeti SQLite k\u00f6nyvt\u00e1rat \u00e9s a go-sqlite3 drivert haszn\u00e1lja, amelyre egy r\u00e9teg ker\u00fcl, amely kezeli az \u00fcgyf\u00e9lk\u00e9relmeket, replik\u00e1lja azokat m\u00e1s csom\u00f3pontokra \u00e9s nyomon k\u00f6veti a vezet\u0151 csom\u00f3pont kiv\u00e1laszt\u00e1s\u00e1hoz sz\u00fcks\u00e9ges konszenzus el\u00e9r\u00e9s\u00e9t.     <\/p>\n<p>Az adatb\u00e1zisba t\u00f6rt\u00e9n\u0151 m\u00f3dos\u00edt\u00e1sokat csak a kiv\u00e1lasztott vezet\u0151 csom\u00f3pont v\u00e9gezheti, de a \u00edr\u00e1si m\u0171veletekkel kapcsolatos kapcsolatok m\u00e1s klaszterre vonatkoz\u00f3 csom\u00f3pontokhoz is ir\u00e1ny\u00edthat\u00f3k, amelyek visszak\u00fcldik a vezet\u0151 c\u00edm\u00e9t a k\u00e9r\u00e9s megism\u00e9tl\u00e9s\u00e9hez (a k\u00f6vetkez\u0151 verzi\u00f3ban automatikus \u00e1tir\u00e1ny\u00edt\u00e1st \u00edg\u00e9rnek a vezet\u0151hez). F\u0151 hangs\u00faly a hibat\u0171r\u00e9sre helyez\u0151dik, ez\u00e9rt az adatb\u00e1zis-kezel\u0151 csak olvas\u00e1si m\u0171veletek eset\u00e9n sk\u00e1l\u00e1zhat\u00f3, m\u00edg az \u00edr\u00e1si m\u0171veletek sz\u0171k keresztmetszetet jelentenek. Egy tengeren m\u0171k\u00f6d\u0151 rqlite klaszter is elind\u00edthat\u00f3, amely a SQLite HTTP-n kereszt\u00fcli el\u00e9r\u00e9s\u00e9re haszn\u00e1lhat\u00f3, hibat\u0171r\u00e9s biztos\u00edt\u00e1sa n\u00e9lk\u00fcl.    <\/p>\n<p>Minden csom\u00f3pont SQLite adatai nem f\u00e1jlban, hanem mem\u00f3ri\u00e1ban t\u00e1rol\u00f3dnak. A Raft protokoll megval\u00f3s\u00edt\u00e1s\u00e1nak r\u00e9teg\u00e9n napl\u00f3zza az \u00f6sszes SQLite parancsot, amely v\u00e1ltoz\u00e1st id\u00e9z el\u0151 az adatb\u00e1zisban. Ezt a napl\u00f3t haszn\u00e1lj\u00e1k a replik\u00e1l\u00e1s sor\u00e1n (a k\u00e9rd\u00e9sek m\u00e1s csom\u00f3pontok k\u00f6z\u00f6tti replik\u00e1l\u00e1sa), \u00faj csom\u00f3pont ind\u00edt\u00e1sakor vagy helyre\u00e1ll\u00edt\u00e1s eset\u00e9n a kapcsolat megszakad\u00e1sa ut\u00e1n. A napl\u00f3 m\u00e9ret\u00e9nek cs\u00f6kkent\u00e9se \u00e9rdek\u00e9ben automatikus t\u00f6m\u00f6r\u00edt\u00e9st alkalmaznak, amely a megadott sz\u00e1m\u00fa v\u00e1ltoztat\u00e1s ut\u00e1n indul el, \u00e9s egy pillanatk\u00e9pet r\u00f6gz\u00edt, amelyhez \u00faj napl\u00f3 k\u00e9sz\u00fcl (a mem\u00f3ria \u00e1llapota megegyezik a pillanatk\u00e9ppel + az \u00f6sszegy\u0171lt v\u00e1ltoz\u00e1snapl\u00f3val).       <\/p>\n<p>Az rqlite jellemz\u0151i:  <\/p>\n<ul>\n<li class=\"l\"> A klaszter telep\u00edt\u00e9se egyszer\u0171, nincs sz\u00fcks\u00e9g k\u00fcl\u00f6n SQLite telep\u00edt\u00e9sre.  <\/li>\n<li class=\"l\"> Lehet\u0151s\u00e9g gyorsan el\u0151\u00e1ll\u00edtani egy SQL t\u00e1rol\u00f3t m\u00e1sol\u00e1s r\u00e9v\u00e9n.  <\/li>\n<li class=\"l\"> K\u00e9szen \u00e1ll a val\u00f3di projektek (production-grade) haszn\u00e1lat\u00e1ra.  <\/li>\n<li class=\"l\"> HTTP(S) API el\u00e9rhet\u0151s\u00e9ge, amely lehet\u0151v\u00e9 teszi az adatok k\u00f6tegelt friss\u00edt\u00e9s\u00e9t \u00e9s a klaszter vezet\u0151 csom\u00f3pontj\u00e1nak meghat\u00e1roz\u00e1s\u00e1t. Parancssori fel\u00fclet \u00e9s kliensk\u00f6nyvt\u00e1rak is rendelkez\u00e9sre \u00e1llnak k\u00fcl\u00f6nb\u00f6z\u0151 programoz\u00e1si nyelvekhez.  <\/li>\n<li class=\"l\"> Szolg\u00e1ltat\u00e1s el\u00e9rhet\u0151s\u00e9ge, amely lehet\u0151v\u00e9 teszi m\u00e1s csom\u00f3pontok meghat\u00e1roz\u00e1s\u00e1t, \u00edgy dinamikusan l\u00e9trehozhat\u00f3k klaszterek.  <\/li>\n<li class=\"l\"> Adatok k\u00f6z\u00f6tti titkos\u00edt\u00e1s t\u00e1mogat\u00e1sa a csom\u00f3pontok k\u00f6z\u00f6tt.  <\/li>\n<li class=\"l\"> Olvas\u00e1si \u00e9lm\u00e9nyegyeztet\u00e9s \u00e9s adatkonzisztencia szintj\u00e9nek be\u00e1ll\u00edt\u00e1s\u00e1nak lehet\u0151s\u00e9ge.  <\/li>\n<li class=\"l\"> Opcion\u00e1lis lehet\u0151s\u00e9g a csom\u00f3pontok csatlakoztat\u00e1s\u00e1ra csak olvas\u00e1si m\u00f3dban, amelyek nem vesznek r\u00e9szt a konszenzus meghat\u00e1roz\u00e1s\u00e1ban, \u00e9s a klaszter olvas\u00e1si m\u0171veleteinek sk\u00e1l\u00e1zhat\u00f3s\u00e1g\u00e1t n\u00f6velik.  <\/li>\n<li class=\"l\"> Saj\u00e1t tranzakci\u00f3s forma t\u00e1mogat\u00e1sa, amely lehet\u0151v\u00e9 teszi t\u00f6bb parancs egy k\u00e9r\u00e9sbe val\u00f3 egyes\u00edt\u00e9s\u00e9t (BEGIN, COMMIT, ROLLBACK, SAVEPOINT \u00e9s RELEASE alap\u00fa tranzakci\u00f3k nem t\u00e1mogatottak).  <\/li>\n<li class=\"l\"> Forr\u00f3 biztons\u00e1gi ment\u00e9sek l\u00e9trehoz\u00e1s\u00e1nak t\u00e1mogat\u00e1sa.  <\/ul>\n<p>Az \u00faj kiad\u00e1sban:  <\/p>\n<ul>\n<li class=\"l\"> Bevezet\u00e9sre ker\u00fclt az automatikus rqlite klaszterez\u00e9s t\u00e1mogat\u00e1sa egy \u00faj csom\u00f3pont-azonos\u00edt\u00f3 szolg\u00e1ltat\u00e1s seg\u00edts\u00e9g\u00e9vel, amely elosztott t\u00e1rol\u00f3kon, mint p\u00e9ld\u00e1ul a Consul \u00e9s az etcd, m\u0171k\u00f6dhet. A szolg\u00e1ltat\u00e1s lehet\u0151v\u00e9 teszi a rqlite csom\u00f3pontok sz\u00e1m\u00e1ra, hogy automatikusan megtal\u00e1lj\u00e1k egym\u00e1st \u2013 a rendszergazd\u00e1nak el\u00e9g csup\u00e1n n\u00e9h\u00e1ny csom\u00f3pontot elind\u00edtani k\u00fcl\u00f6nb\u00f6z\u0151 <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hu\/server\/dts-gdansk\/\"   title=\"szervereken\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4533\">szervereken<\/a>, megadva egy k\u00f6z\u00f6s c\u00edmet a Consul vagy etcd klaszterhez (p\u00e9ld\u00e1ul \u201eexample.com:8500\u201d), \u00e9s a csom\u00f3pontok automatikusan \u00f6ssze fognak \u00e1llni klaszterbe. A vezet\u0151 csom\u00f3pont id\u0151nk\u00e9nt friss\u00edti a Consul vagy etcd t\u00e1rol\u00f3ban a saj\u00e1t c\u00edm\u00e9t, ami lehet\u0151v\u00e9 teszi, hogy a vezet\u0151t k\u00e9s\u0151bb an\u00e9lk\u00fcl v\u00e1ltoztassuk meg, hogy a t\u00f6bbi csom\u00f3pontot \u00fajra kellene konfigur\u00e1lnunk, \u00e9s \u00faj csom\u00f3pontokat is hozz\u00e1adhatunk, m\u00e9g a vezet\u0151 megv\u00e1ltoztat\u00e1sa ut\u00e1n is. A r\u00e9gi csom\u00f3pont-azonos\u00edt\u00f3 szolg\u00e1ltat\u00e1s (Discovery mode), amely az AWS Lambda-in m\u0171k\u00f6d\u00f6tt, le\u00e1llt.\n<li class=\"l\"> A CLI fel\u00fclet\u00e9n t\u00f6bb gazdag\u00e9p megad\u00e1sa is enged\u00e9lyezett \u2013 ha az els\u0151 csom\u00f3pont nem el\u00e9rhet\u0151, a k\u00f6vetkez\u0151 gazdag\u00e9pekre fogunk hivatkozni.\n<li class=\"l\"> Az elavult protobuf csomag haszn\u00e1lata megsz\u0171nt.\n<li class=\"l\"> A Raft protokoll megval\u00f3s\u00edt\u00e1s\u00e1ban haszn\u00e1lt BoltDB t\u00e1rol\u00f3t bbolt-ra cser\u00e9lt\u00e9k, amely az etcd projekt forkja.\n<li class=\"l\"> A BoltDB t\u00e1rol\u00f3t, amelyet a Raft protokoll megval\u00f3s\u00edt\u00e1s\u00e1ban haszn\u00e1lnak, bbolt-ra cser\u00e9lt\u00e9k, amely az etcd projekt forkja.      <\/ul>\n<p>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56600\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f \u0440\u0435\u043b\u0438\u0437 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u043e\u0439 \u0421\u0423\u0411\u0414 rqlite 7.0, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442 SQLite \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u0434\u0432\u0438\u0436\u043a\u0430 \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u0440\u0430\u0431\u043e\u0442\u0443 \u043a\u043b\u0430\u0441\u0442\u0435\u0440\u0430 \u0438\u0437 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043c\u0435\u0436\u0434\u0443 \u0441\u043e\u0431\u043e\u0439 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449. \u0418\u0437 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u0435\u0439 rqlite \u043e\u0442\u043c\u0435\u0447\u0430\u0435\u0442\u0441\u044f \u043f\u0440\u043e\u0441\u0442\u043e\u0442\u0430 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438, \u0440\u0430\u0437\u0432\u0451\u0440\u0442\u044b\u0432\u0430\u043d\u0438\u044f \u0438 \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u043e\u0433\u043e \u043e\u0442\u043a\u0430\u0437\u043e\u0443\u0441\u0442\u043e\u0439\u0447\u0438\u0432\u043e\u0433\u043e \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0430, \u0447\u0435\u043c-\u0442\u043e \u043f\u043e\u0445\u043e\u0436\u0435\u0433\u043e \u043d\u0430 etcd \u0438 Consul, \u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0435\u0433\u043e \u0440\u0435\u043b\u044f\u0446\u0438\u043e\u043d\u043d\u0443\u044e \u043c\u043e\u0434\u0435\u043b\u044c \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u0434\u0430\u043d\u043d\u044b\u043c\u0438 \u0432\u043c\u0435\u0441\u0442\u043e \u0444\u043e\u0440\u043c\u0430\u0442\u0430 \u043a\u043b\u044e\u0447\/\u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f. \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 [&hellip;]<\/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-103120","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0421\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f \u0440\u0435\u043b\u0438\u0437 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