{"id":37709,"date":"2019-10-31T22:19:14","date_gmt":"2019-10-31T19:19:14","guid":{"rendered":"https:\/\/prohoster.info\/blog\/dostupen-dqlite-1-0-raspredelyonnyj-variant-sqlite-ot-kompanii-canonical\/"},"modified":"2019-10-31T22:19:14","modified_gmt":"2019-10-31T19:19:14","slug":"dostupen-dqlite-1-0-raspredelyonnyj-variant-sqlite-ot-kompanii-canonical","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/news\/dostupen-dqlite-1-0-raspredelyonnyj-variant-sqlite-ot-kompanii-canonical","title":{"rendered":"Dqlite 1.0 \u00e4r tillg\u00e4nglig, en distribuerad variant av SQLite fr\u00e5n Canonical.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>F\u00f6retaget Canonical <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/canonical\/dqlite\/releases\/tag\/v1.0.0\">publicerade<\/a><\/noindex> Betydande lansering av projektet <noindex><a rel=\"nofollow\" href=\"https:\/\/dqlite.io\/\">Dqlite 1.0<\/a><\/noindex> (Distributed SQLite), som utvecklar en SQLite-kompatibel inb\u00e4ddad SQL-motor som st\u00f6djer datareplication, automatisk \u00e5terst\u00e4llning efter avbrott och s\u00e4kerst\u00e4ller redundans genom att sprida hanterare \u00f6ver flera noder. Databashanteringssystemet \u00e4r implementerat i form av ett C-bibliotek som kopplas till applikationer och <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/canonical\/dqlite\">sprids<\/a><\/noindex> sl\u00e4pps under Apache 2.0-licensen (den ursprungliga SQLite distribueras som offentlig dom\u00e4n). Bindningar f\u00f6r spr\u00e5ket finns tillg\u00e4ngliga. <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/canonical\/go-dqlite\">Go<\/a><\/noindex>.<\/p>\n<p>Biblioteket \u00e4r ett till\u00e4gg till den befintliga SQLite-koden som l\u00e4gger till st\u00f6d f\u00f6r n\u00e4tverksprotokoll f\u00f6r att koppla samman flera instanser av applikationen som k\u00f6rs p\u00e5 olika v\u00e4rdar. En applikation som byggts med Dqlite kan fungera som en sj\u00e4lvb\u00e4rande redundanskluster utan att vara beroende av externa databashanteringssystem. I praktiken anv\u00e4nds Dqlite av Canonical i containerhanteringssystemet. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=44228\">LXD<\/a><\/noindex>Inom omr\u00e5den som bibliotekets till\u00e4mpning n\u00e4mns \u00e4ven skapandet av redundanta Internet of Things-enheter och bearbetare i system<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=48372\">Edge<\/a><\/noindex><noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51077\">-ber\u00e4kningar<\/a><\/noindex>. <\/p>\n<p>F\u00f6r att s\u00e4kerst\u00e4lla konsistens vid datareplication till\u00e4mpas en konsensusmetod baserad p\u00e5 algoritmen  <noindex><a rel=\"nofollow\" href=\"https:\/\/raft.github.io\/\">Raft<\/a><\/noindex>, som anv\u00e4nds i projekt som etcd, RethinkDB, CockroachDB och OpenDaylight. I Dqlite anv\u00e4nds en egen asynkron implementation av <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/canonical\/raft\">C-raft<\/a><\/noindex>, skriven i C. F\u00f6r multiplexering av anslutningsbehandling och organisering av programmets k\u00f6rning anv\u00e4nds f\u00e4rdiga bibliotek. <noindex><a rel=\"nofollow\" href=\"https:\/\/libuv.org\/\">libuv<\/a><\/noindex> och <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/canonical\/libco\">libco<\/a><\/noindex>.<\/p>\n<p>J\u00e4mf\u00f6rt med det liknande projektet  <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/rqlite\/rqlite\">rqlite<\/a><\/noindex>, erbjuder Dqlite fullst\u00e4ndigt st\u00f6d f\u00f6r transaktioner, kan ansluta till alla projekt skrivna i C, till\u00e5ter anv\u00e4ndning av funktionen time() och till\u00e4mpar replikation baserad p\u00e5 ramverk ist\u00e4llet f\u00f6r replikation baserad p\u00e5 SQL-uttryck.<\/p>\n<p>Funktioner hos Dqlite:<\/p>\n<ul>\n<li class=\"l\"> Utf\u00f6rande av alla disk- och n\u00e4tverksoperationer i asynkront l\u00e4ge;\n<li class=\"l\"> Tillg\u00e5ng till en testupps\u00e4ttning f\u00f6r att bekr\u00e4fta datakorrekthet;\n<li class=\"l\"> L\u00e5gt minnesutnyttjande och effektiv datakommunikation \u00f6ver n\u00e4tverket;\n<li class=\"l\"> Konsistent lagring av databasen och transaktionsloggen p\u00e5 disken (med m\u00f6jlighet till caching i minnet);\n<li class=\"l\"> Snabb \u00e5terst\u00e4llning efter avbrott;\n<li class=\"l\"> En stabil CLI-klient skriven i Go, som kan anv\u00e4ndas f\u00f6r att initiera databasen, st\u00e4lla in replikation och koppla ansluta\/koppla fr\u00e5n noder;\n<li class=\"l\"> St\u00f6d f\u00f6r ARM-, X86-, POWER- och IBM Z-arkitekturer;\n<li class=\"l\"> Genomf\u00f6randet av Raft-algoritmen \u00e4r optimerat f\u00f6r att minimera f\u00f6rdr\u00f6jningar vid transaktions\u00e5taganden.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>K\u00e4lla: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51402\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Canonical \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0430 \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Dqlite 1.0 (Distributed SQLite), \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u044b\u0439 \u0441 SQLite \u0432\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0435\u043c\u044b\u0439 SQL-\u0434\u0432\u0438\u0436\u043e\u043a, \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u044e\u0449\u0438\u0439 \u0440\u0435\u043f\u043b\u0438\u043a\u0430\u0446\u0438\u044e \u0434\u0430\u043d\u043d\u044b\u0445, \u0430\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0435 \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u043e\u0441\u043b\u0435 \u0441\u0431\u043e\u0435\u0432 \u0438 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u0435 \u043e\u0442\u043a\u0430\u0437\u043e\u0443\u0441\u0442\u043e\u0439\u0447\u0438\u0432\u043e\u0441\u0442\u0438 \u0447\u0435\u0440\u0435\u0437 \u0440\u0430\u0437\u043d\u0435\u0441\u0435\u043d\u0438\u0435 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 \u043d\u0430 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u0443\u0437\u043b\u043e\u0432. \u0421\u0423\u0411\u0414 \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u0430 \u0432 \u0444\u043e\u0440\u043c\u0435 \u043f\u0440\u0438\u043a\u0440\u0435\u043f\u043b\u044f\u0435\u043c\u043e\u0439 \u043a \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f\u043c \u0421\u0438-\u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 \u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 Apache 2.0 (\u043e\u0440\u0438\u0433\u0438\u043d\u0430\u043b\u044c\u043d\u044b\u0439 SQLite \u043f\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043a\u0430\u043a \u043e\u0431\u0449\u0435\u0441\u0442\u0432\u0435\u043d\u043d\u043e\u0435 \u0434\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435). \u0414\u043e\u0441\u0442\u0443\u043f\u043d\u044b \u0431\u0438\u043d\u0434\u0438\u043d\u0433\u0438 \u0434\u043b\u044f [&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-37709","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Canonical \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0430 \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0440\u043e\u0435\u043a\u0442\u0430\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" 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