{"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\/ro\/blog\/news\/dostupen-dqlite-1-0-raspredelyonnyj-variant-sqlite-ot-kompanii-canonical","title":{"rendered":"Dqlite 1.0 este disponibil, o variant\u0103 distribuit\u0103 a SQLite de la Canonical","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Compania Canonical <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/canonical\/dqlite\/releases\/tag\/v1.0.0\">a publicat<\/a><\/noindex> o lansare semnificativ\u0103 a proiectului <noindex><a rel=\"nofollow\" href=\"https:\/\/dqlite.io\/\">Dqlite 1.0<\/a><\/noindex> (Distributed SQLite), dezvolta un motor SQL \u00eencorporabil compatibil cu SQLite, care suport\u0103 replicarea datelor, recuperarea automat\u0103 dup\u0103 erori \u0219i asigurarea rezilien\u021bei prin distribuirea handler-ilor pe mai multe noduri. SGBD-ul este implementat sub forma unei biblioteci C ata\u0219ate aplica\u021biilor \u0219i <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/canonical\/dqlite\">se r\u0103sp\u00e2nde\u0219te<\/a><\/noindex> sub licen\u021ba Apache 2.0 (SQLite original este oferit ca domeniu public). Sunt disponibile leg\u0103turi pentru limbajul <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/canonical\/go-dqlite\">Go<\/a><\/noindex>.<\/p>\n<p>Biblioteca este o extensie a bazei de cod existente SQLite, care adaug\u0103 suport pentru protocolul de re\u021bea pentru a lega \u00eentre ele mai multe instan\u021be ale aplica\u021biei rul\u00e2nd pe gazde diferite. O aplica\u021bie construit\u0103 cu Dqlite poate func\u021biona ca un cluster rezistent la erori, independent de SGBD-urile externe. \u00cen practic\u0103, Dqlite este utilizat de Canonical \u00een sistemul de gestionare a containerelor. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=44228\">LXD<\/a><\/noindex>Domeniile de aplicare ale bibliotecii includ de asemenea crearea de dispozitive IoT rezistente la erori \u0219i processori \u00een sistemele<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\">-computational<\/a><\/noindex>. <\/p>\n<p>Pentru a asigura consisten\u021ba \u00een timpul replic\u0103rii datelor, se aplic\u0103 o metod\u0103 de atingere a consensului bazat\u0103 pe algoritmul  <noindex><a rel=\"nofollow\" href=\"https:\/\/raft.github.io\/\">Raft<\/a><\/noindex>, utilizat \u00een proiecte precum etcd, RethinkDB, CockroachDB \u0219i OpenDaylight. \u00cen Dqlite se aplic\u0103 o implementare asincron\u0103 proprie <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/canonical\/raft\">C-raft<\/a><\/noindex>, scris\u0103 \u00een limbajul C. Pentru multiplexarea gestion\u0103rii conexiunilor \u0219i organizarea execu\u021biei coroutine se utilizeaz\u0103 biblioteci gata realizate <noindex><a rel=\"nofollow\" href=\"https:\/\/libuv.org\/\">libuv<\/a><\/noindex> \u0219i <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/canonical\/libco\">libco<\/a><\/noindex>.<\/p>\n<p>Comparativ cu un proiect similar  <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/rqlite\/rqlite\">rqlite<\/a><\/noindex>, Dqlite ofer\u0103 un suport complet pentru tranzac\u021bii, se poate lega cu orice proiecte \u00een limbajul C, permite utilizarea func\u021biei time() \u0219i aplic\u0103 replicarea bazat\u0103 pe cadre \u00een loc de replicarea bazat\u0103 pe transcrierea expresiilor SQL.<\/p>\n<p>Caracteristicile Dqlite:<\/p>\n<ul>\n<li class=\"l\"> Executarea tuturor opera\u021biunilor de pe disc \u0219i re\u021bea \u00een mod asincron;\n<li class=\"l\"> Disponibilitatea unui set de teste pentru a confirma corectitudinea datelor;\n<li class=\"l\"> Consum sc\u0103zut de memorie \u0219i schimb eficient de date prin re\u021bea;\n<li class=\"l\"> Stocare constant\u0103 pe disc a Bazei de Date \u0219i a jurnalului de tranzac\u021bii (cu posibilitatea de caching \u00een memorie);\n<li class=\"l\"> Recuperare rapid\u0103 dup\u0103 erori;\n<li class=\"l\"> Client CLI stabil scris \u00een Go, care poate fi utilizat pentru ini\u021bializarea Bazei de Date, configurarea replic\u0103rii \u0219i conectarea\/deconectarea nodurilor;\n<li class=\"l\"> Suport pentru arhitecturi ARM, X86, POWER \u0219i IBM Z;\n<li class=\"l\"> Implementarea algoritmului Raft este optimizat\u0103 pentru a minimiza \u00eent\u00e2rzierile \u00een cadrul confirm\u0103rii tranzac\u021biilor.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Sursa: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51402\">opennet.ro<\/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 5.0.2.1 - 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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