{"id":103994,"date":"2022-05-10T09:36:51","date_gmt":"2022-05-10T07:36:51","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/predstavlen-litestream-s-realizacziej-sistemy-replikaczii-dlya-sqlite"},"modified":"2022-05-10T09:36:51","modified_gmt":"2022-05-10T07:36:51","slug":"predstavlen-litestream-s-realizacziej-sistemy-replikaczii-dlya-sqlite","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/predstavlen-litestream-s-realizacziej-sistemy-replikaczii-dlya-sqlite","title":{"rendered":"Wprowadzono Litestream, implementacj\u0119 systemu replikacji dla SQLite.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Ben Johnson, autor NoSQL-bazy danych BoltDB, zaprezentowa\u0142 projekt Litestream, kt\u00f3ry dostarcza nak\u0142adk\u0119 do organizacji replikacji danych w SQLite. Litestream nie wymaga wprowadzania zmian w SQLite i mo\u017ce dzia\u0142a\u0107 z dowolnymi aplikacjami korzystaj\u0105cymi z tej biblioteki. Replikacj\u0105 zajmuje si\u0119 oddzielny proces w tle, kt\u00f3ry \u015bledzi zmiany w plikach bazy danych i przenosi je do innego pliku lub zewn\u0119trznego magazynu. Kod projektu napisany jest w j\u0119zyku Go i jest rozpowszechniany na licencji Apache 2.0. <\/p>\n

Ca\u0142a interakcja z baz\u0105 danych odbywa si\u0119 za pomoc\u0105 standardowego API SQLite, tzn. Litestream nie ingeruje bezpo\u015brednio w dzia\u0142anie, nie wp\u0142ywa na wydajno\u015b\u0107 i nie mo\u017ce uszkodzi\u0107 zawarto\u015bci bazy danych, co wyr\u00f3\u017cnia Litestream na tle takich rozwi\u0105za\u0144 jak Rqlite i Dqlite. Zmiany s\u0105 \u015bledzone przez w\u0142\u0105czenie dziennika WAL (\u201eWrite-Ahead Log\u201d) w SQLite. Aby zaoszcz\u0119dzi\u0107 miejsce w przechowywaniu, system okresowo agreguje strumie\u0144 zmian w migawkach (snapshotach) bazy danych, na kt\u00f3re zaczynaj\u0105 nak\u0142ada\u0107 si\u0119 inne zmiany. Czas tworzenia migawek okre\u015bla si\u0119 w ustawieniach, na przyk\u0142ad mo\u017cna tworzy\u0107 migawki co dzie\u0144 lub co godzin\u0119. <\/p>\n

Podstawowe obszary zastosowania Litestream obejmuj\u0105 organizacj\u0119 bezpiecznego backupu oraz rozk\u0142ad obci\u0105\u017cenia odczytu na kilka serwer\u00f3w<\/a>. Wspierane jest przenoszenie strumienia zmian do magazyn\u00f3w Amazon S3, Azure Blob Storage, Backblaze B2, DigitalOcean Spaces, Scaleway Object Storage, Google Cloud Storage, Linode Object Storage lub na dowolny zewn\u0119trzny host obs\u0142uguj\u0105cy protok\u00f3\u0142 SFTP. W przypadku uszkodzenia zawarto\u015bci g\u0142\u00f3wnej bazy danych, kopia zapasowa mo\u017ce zosta\u0107 przywr\u00f3cona do stanu odpowiadaj\u0105cego wskazanemu momentowi czasowemu, okre\u015blonemu zmianie, ostatniej zmianie lub okre\u015blonej migawce.
\n
\u0179r\u00f3d\u0142o: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0411\u0435\u043d \u0414\u0436\u043e\u043d\u0441\u043e\u043d (Ben Johnson), \u0430\u0432\u0442\u043e\u0440 NoSQL-\u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0430 BoltDB, \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b \u043f\u0440\u043e\u0435\u043a\u0442 Litestream, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0438\u0439 \u043d\u0430\u0434\u0441\u0442\u0440\u043e\u0439\u043a\u0443 \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0440\u0435\u043f\u043b\u0438\u043a\u0430\u0446\u0438\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u0432 SQLite. Litestream \u043d\u0435 \u0442\u0440\u0435\u0431\u0443\u0435\u0442 \u0432\u043d\u0435\u0441\u0435\u043d\u0438\u044f \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439 \u0432 SQLite \u0438 \u043c\u043e\u0436\u0435\u0442 \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c \u0441 \u043b\u044e\u0431\u044b\u043c\u0438 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f\u043c\u0438, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u043c\u0438 \u0434\u0430\u043d\u043d\u0443\u044e \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0443. \u0420\u0435\u043f\u043b\u0438\u043a\u0430\u0446\u0438\u0435\u0439 \u0437\u0430\u043d\u0438\u043c\u0430\u0435\u0442\u0441\u044f \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u044b\u0439 \u0444\u043e\u043d\u043e\u0432\u044b\u0439 \u043f\u0440\u043e\u0446\u0435\u0441\u0441, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043e\u0442\u0441\u043b\u0435\u0436\u0438\u0432\u0430\u0435\u0442 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432 \u0444\u0430\u0439\u043b\u0430\u0445 \u0441 \u0411\u0414 \u0438 \u043f\u0435\u0440\u0435\u043d\u043e\u0441\u0438\u0442 \u0438\u0445 \u0432 \u0434\u0440\u0443\u0433\u043e\u0439 \u0444\u0430\u0439\u043b \u0438\u043b\u0438 \u0432\u043e […]<\/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-103994","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Litestream z systemem replikacji dla SQLite | 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