{"id":121799,"date":"2025-02-10T15:46:10","date_gmt":"2025-02-10T13:46:10","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/opublikovana-raspredelyonnaya-subd-citus-13-0"},"modified":"2025-02-10T15:46:10","modified_gmt":"2025-02-10T13:46:10","slug":"opublikovana-raspredelyonnaya-subd-citus-13-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/opublikovana-raspredelyonnaya-subd-citus-13-0","title":{"rendered":"Avaldati hajus andmebaas Citus 13.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Citus Data, mis kuulub Microsoftile, on avaldanud jaotatud andmebaasi Citus 13.0, mis on rakendatud PostgreSQL 17 laiendusena. Citus v\u00f5imaldab PostgreSQL-i horisontaalset skaleerimist tipptasemel riistvara p\u00f5hisel klastril ning v\u00f5imaldab andmeid jagada s\u00f5lmede vahel sharding-tehnoloogia abil, m\u00e4\u00e4rates veergude tasemel ja salvestusskeemide jaotamise. Citus klaster n\u00e4eb rakenduste jaoks v\u00e4lja nagu \u00fcks suur PostgreSQL server, tuues kokku selle s\u00f5lmede ressursid. Kood on kirjutatud C keeles ja levitatakse AGPLv3 litsentsi alusel.      <\/p>\n<p>Sharding v\u00f5imaldab korraldada v\u00e4ga suurte andmemahtude salvestamist, mille kogumaht \u00fcletab oluliselt iga klastris oleva s\u00f5lme kohalikke andmekandjaid. Eraldi tabeleid saab sundrepresseerida k\u00f5igis s\u00f5lmedes, et kiirendada sulandamistegude t\u00e4itmist ja v\u00e4liste v\u00f5tmete haldamist. Ruumi kokkuhoidmiseks v\u00f5ivad eri s\u00f5lmedes jaotatud andmed olla salvestatud komprimeeritud kujul.       <\/p>\n<p>Jaotatud p\u00e4ringud v\u00f5ivad minna \u00fcksk\u00f5ik millisele klastris olevale s\u00f5lmele, kuid andmeskeemi haldamine ja muutmine peab toimuma ainult s\u00f5lme kaudu, mis koordineerib klastrite tegevust. Kliendilt saadud p\u00e4ringud jaotatakse vajalikele s\u00f5lmedele ja kui need katab mitu s\u00f5lme, t\u00f6\u00f6deldakse neid paralleelselt. Klastrit saab kohandada andmemahtude suurenedes, lisades t\u00e4iendavaid s\u00f5lmi ja algatades uuesti tasakaalustamise.     <\/p>\n<p>T\u00fc\u00fcpilisteks Citus kasutusn\u00e4idisteks on anal\u00fc\u00fctiliste p\u00e4ringute t\u00e4itmine ja suurte andmehulkade t\u00f6\u00f6tlemine ajareal (n\u00e4iteks logid v\u00f5i sensorite oleku k\u00fcsitlused). Citus sobib ka olemasoleva infrastruktuuri moderniseerimiseks, mis p\u00f5hineb \u00fchelik <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/server\/dts-los-angeles\/\"   title=\"serverilt\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3899\">serverilt<\/a> PostgreSQL-il, mille j\u00f5udlus ja andmekandjad ei suuda enam suurenema kande v\u00f5i suurenemise t\u00f5ttu andmete hulga t\u00f5ttu rahuldada. Patroni t\u00f6\u00f6riista abil on v\u00f5imalik luua talitluspidevaid konfiguratsioone replikatsiooniga varus\u00f5lmedega, mis suudavad t\u00f5rke korral h\u00f5ivata peamise s\u00f5lme kohta.      <\/p>\n<p>Muudatused Citus 13.0 v\u00e4ljaandes:  <\/p>\n<ul>\n<li class=\"l\"> \u00dcleminek PostgreSQL 17 haru kasutusele.\n<li class=\"l\"> V\u00f5imalus kasutada jaotatud p\u00e4ringutes funktsiooni JSON_TABLE() andmete konvertimiseks JSON-formaadist relatsioonilisse esitusesse, millega saab t\u00f6\u00f6tada nagu tavaliste PostgreSQL tabelitega.\n<li class=\"l\"> \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441\u0430 &#171;MERGE &#8230; WHEN NOT MATCHED BY SOURCE&#187;.\n<li class=\"l\">  \u0412\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u043c\u0435\u0442\u043e\u0434\u0430 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u0434\u043b\u044f \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0445 \u0441\u0435\u043a\u0446\u0438\u043e\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0442\u0430\u0431\u043b\u0438\u0446 \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u044f &#171;CREATE TABLE &#8230; USING&#187;, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u043c\u0435\u0442\u043e\u0434\u0430 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u0447\u0435\u0440\u0435\u0437 &#171;ALTER TABLE &#8230; SET ACCESS METHOD&#187;.\n<li class=\"l\"> Lisatud tugi automaatselt genereeritavate tuvastamisveerudena jaotatud jaotatud tabelites.\n<li class=\"l\"> Lubatud on erandeid k\u00e4sitlevate piirangute rakendamine jaotatud jaotatud tabelites.\n<li class=\"l\"> Lahendatud probleemid rollide s\u00fcnkroniseerimisega s\u00f5lmede vahel.\n<li class=\"l\"> Parandatud andmete jaotust sharding'ul uute s\u00f5lmede lisamisel klastrisse.\n<li class=\"l\"> \u0412 \u043a\u043e\u043c\u0430\u043d\u0434\u0443 &#171;EXPLAIN&#187; \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u044b \u043e\u043f\u0446\u0438\u0438 &#171;MEMORY&#187; \u0438 &#171;SERIALIZE&#187;, \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043c\u043e\u0436\u043d\u043e \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u044c \u0440\u0430\u0437\u043c\u0435\u0440 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438 \u0438 \u0432\u0440\u0435\u043c\u044f, \u043f\u043e\u0442\u0440\u0430\u0447\u0435\u043d\u043d\u043e\u0435 \u043d\u0430 \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0434\u0430\u043d\u043d\u044b\u0445 \u0434\u043b\u044f \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0438 \u043f\u043e \u0441\u0435\u0442\u0438.       <\/ul>\n<p>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=62701\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Citus Data, \u043f\u0440\u0438\u043d\u0430\u0434\u043b\u0435\u0436\u0430\u0449\u0430\u044f Microsoft, \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0430 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u0443\u044e \u0421\u0423\u0411\u0414 Citus 13.0, \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u0443\u044e \u0432 \u0444\u043e\u0440\u043c\u0435 \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u044f \u043a PostgreSQL 17. Citus \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u0435\u0442 \u0433\u043e\u0440\u0438\u0437\u043e\u043d\u0442\u0430\u043b\u044c\u043d\u043e\u0435 \u043c\u0430\u0441\u0448\u0442\u0430\u0431\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 PostgreSQL \u0432 \u043a\u043b\u0430\u0441\u0442\u0435\u0440\u0435 \u043d\u0430 \u0431\u0430\u0437\u0435 \u0442\u0438\u043f\u043e\u0432\u043e\u0433\u043e \u043e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u044f \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0440\u0430\u0437\u043d\u043e\u0441\u0438\u0442\u044c \u0434\u0430\u043d\u043d\u044b\u0435 \u043f\u043e \u0443\u0437\u043b\u0430\u043c \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u0448\u0430\u0440\u0434\u0438\u043d\u0433\u0430 (sharding) \u0441 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u043e\u0439 \u0440\u0430\u0437\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u043d\u0430 \u0443\u0440\u043e\u0432\u043d\u0435 \u0441\u0442\u043e\u043b\u0431\u0446\u043e\u0432 \u0438 \u0441\u0445\u0435\u043c\u044b \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f. \u0414\u043b\u044f \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043a\u043b\u0430\u0441\u0442\u0435\u0440 Citus \u0432\u044b\u0433\u043b\u044f\u0434\u0438\u0442 \u043a\u0430\u043a \u043e\u0434\u0438\u043d \u0431\u043e\u043b\u044c\u0448\u043e\u0439 [&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-121799","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Citus Data, 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