{"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\/sk\/blog\/news\/dostupen-dqlite-1-0-raspredelyonnyj-variant-sqlite-ot-kompanii-canonical","title":{"rendered":"Dqlite 1.0, distribuovan\u00e1 varianta SQLite od spole\u010dnosti Canonical, je nyn\u00ed k dispozici.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Spolo\u010dnos\u0165 Canonical <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/canonical\/dqlite\/releases\/tag\/v1.0.0\">publikovala<\/a><\/noindex> v\u00fdznamn\u00e9 vydanie projektu <noindex><a rel=\"nofollow\" href=\"https:\/\/dqlite.io\/\">Dqlite 1.0<\/a><\/noindex> (Distributed SQLite), vyv\u00edjaj\u00face kompatibiln\u00fd so SQLite vstavan\u00fd SQL engine, ktor\u00fd podporuje replik\u00e1ciu \u00fadajov, automatick\u00e9 obnovenie po hav\u00e1rii a zabezpe\u010denie dostupnosti prostredn\u00edctvom rozlo\u017eenia spracovate\u013eov na viacer\u00fdch uzloch. Syst\u00e9m riadenia datab\u00e1z je realizovan\u00fd v podobe kni\u017enice pripojenej k aplik\u00e1ci\u00e1m v jazyku C a <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/canonical\/dqlite\">distribuovan\u00fd<\/a><\/noindex> pod licenciou Apache 2.0 (p\u00f4vodn\u00fd SQLite je k dispoz\u00edcii ako verejn\u00fd majetok). K dispoz\u00edcii s\u00fa v\u00e4zby pre jazyk <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/canonical\/go-dqlite\">Go<\/a><\/noindex>.<\/p>\n<p>Kni\u017enica je nadstavbou nad existuj\u00facou k\u00f3dovou z\u00e1klad\u0148ou SQLite, ktor\u00e1 prid\u00e1va podporu sie\u0165ov\u00e9ho protokolu na prepojenie viacer\u00fdch in\u0161tanci\u00ed aplik\u00e1cie spusten\u00fdch na r\u00f4znych hostite\u013eoch. Aplik\u00e1cia zostaven\u00e1 s Dqlite m\u00f4\u017ee fungova\u0165 ako samostatn\u00fd odoln\u00fd klaster, nez\u00e1visl\u00fd od extern\u00fdch SDB. V praxi sa Dqlite pou\u017e\u00edva spolo\u010dnos\u0165ou Canonical v syst\u00e9me spr\u00e1vy kontajnerov <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=44228\">LXD<\/a><\/noindex>. Medzi oblasti pou\u017eitia kni\u017enice sa tie\u017e uv\u00e1dza vytv\u00e1ranie odoln\u00fdch zariaden\u00ed internetu vec\u00ed a spracovate\u013eov v syst\u00e9moch<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\">-v\u00fdpo\u010dtov<\/a><\/noindex>. <\/p>\n<p>Na zabezpe\u010denie konzistentnosti pri replik\u00e1cii \u00fadajov sa pou\u017e\u00edva met\u00f3da dosahovania konsenzu zalo\u017een\u00e1 na algoritme  <noindex><a rel=\"nofollow\" href=\"https:\/\/raft.github.io\/\">Raft<\/a><\/noindex>, ktor\u00fd sa pou\u017e\u00edva v tak\u00fdch projektoch ako etcd, RethinkDB, CockroachDB a OpenDaylight. V Dqlite sa pou\u017e\u00edva vlastn\u00e1 asynchr\u00f3nna implement\u00e1cia <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/canonical\/raft\">C-raft<\/a><\/noindex>, nap\u00edsan\u00e1 v jazyku C. Na multiplexovanie spracovania pripojen\u00ed a organiz\u00e1ciu sp\u00fa\u0161\u0165ania kooperat\u00edvnych procesov sa pou\u017e\u00edvaj\u00fa hotov\u00e9 kni\u017enice <noindex><a rel=\"nofollow\" href=\"https:\/\/libuv.org\/\">libuv<\/a><\/noindex> a <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/canonical\/libco\">libco<\/a><\/noindex>.<\/p>\n<p>V porovnan\u00ed s podobn\u00fdm projektom  <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/rqlite\/rqlite\">rqlite<\/a><\/noindex>, Dqlite poskytuje \u00fapln\u00fa podporu transakci\u00ed, m\u00f4\u017ee sa prepoji\u0165 s ak\u00fdmiko\u013evek projektmi v jazyku C, umo\u017e\u0148uje pou\u017e\u00edva\u0165 funkciu time() a aplikuje replik\u00e1ciu zalo\u017een\u00fa na sn\u00edmkach namiesto replik\u00e1cie na z\u00e1klade \u0161\u00edrenia SQL v\u00fdrazov.<\/p>\n<p>Funkcie Dqlite:<\/p>\n<ul>\n<li class=\"l\"> Vykon\u00e1vanie v\u0161etk\u00fdch diskov\u00fdch a sie\u0165ov\u00fdch oper\u00e1ci\u00ed v asynchr\u00f3nnom re\u017eime;\n<li class=\"l\"> Existencia testovacej sady na potvrdenie spr\u00e1vnosti \u00fadajov;\n<li class=\"l\"> N\u00edzka spotreba pam\u00e4te a efekt\u00edvna v\u00fdmena \u00fadajov v sieti;\n<li class=\"l\"> Trval\u00e9 ulo\u017eenie na disku DB a logu transakci\u00ed (s mo\u017enos\u0165ou vyrovn\u00e1vacej pam\u00e4te v pam\u00e4ti);\n<li class=\"l\"> R\u00fdchle obnovenie po hav\u00e1rii;\n<li class=\"l\"> Stabiln\u00fd CLI klient v jazyku Go, ktor\u00fd sa d\u00e1 pou\u017ei\u0165 na inicializ\u00e1ciu DB, nastavenie replik\u00e1cie a pripojenie\/odpojenie uzlov;\n<li class=\"l\"> Podpora architekt\u00far ARM, X86, POWER a IBM Z;\n<li class=\"l\"> Implement\u00e1cia algoritmu Raft je optimalizovan\u00e1 na minimaliz\u00e1ciu oneskoren\u00ed pri potvrdzovan\u00ed transakci\u00ed.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Zdroj: <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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