{"id":781,"date":"2020-01-10T15:22:00","date_gmt":"2020-01-10T14:22:00","guid":{"rendered":"https:\/\/explainit.pl\/wordpress\/?p=781"},"modified":"2020-07-08T21:26:18","modified_gmt":"2020-07-08T19:26:18","slug":"postgresql-12-co-sie-stalo-z-plikiem-recovery-conf","status":"publish","type":"post","link":"https:\/\/explainit.pl\/wordpress\/2020\/01\/10\/postgresql-12-co-sie-stalo-z-plikiem-recovery-conf\/","title":{"rendered":"PostgreSQL 12 – co si\u0119 sta\u0142o z plikiem recovery.conf?"},"content":{"rendered":"\n

Pojawienie si\u0119 dwunastej wersji serwera PostgreSQL spowodowa\u0142o konieczno\u015b\u0107 wprowadzenia poprawek do stosowanych przez nas procedur odtwarzania bazy danych po awarii! Przypomnijmy, \u017ce w wersjach PostgreSQL 8, 9, 10, i 11 odtwarzanie bazy danych w oparciu o archiwalne pliki WAL realizowali\u015bmy poprzez utworzenie w katalogu Data Directory pliku o nazwie recovery.conf<\/code>, a w nim – umieszczenie parametru restore_command<\/code>. Parametr ten wskazywa\u0142 spos\u00f3b przywracania archiwalnych plik\u00f3w WAL z lokalizacji, w kt\u00f3rej pierwotnie by\u0142y one zapisane. W chwili uruchamiania serwera, plik recovery.conf<\/code> by\u0142 automatycznie wykrywany i powodowa\u0142 przej\u015bcie serwera w tryb aplikowania historycznych transakcji z archiwalnych plik\u00f3w WAL. Po zako\u0144czeniu procesu odtwarzania, plik recovery.conf<\/code> zmienia\u0142 nazw\u0119 na recovery.done<\/code>.<\/p>\n\n\n\n

Pocz\u0105wszy od wersji PostgreSQL 12, parametr restore_command<\/code> umieszczamy w g\u0142\u00f3wnym pliku parametr\u00f3w (zwykle postgresql.conf<\/code> w katalogu Data Directory), a do wyzwolenia trybu aplikowania historycznych transakcji z archiwalnych plik\u00f3w WAL s\u0142u\u017cy teraz plik-marker o nazwie recovery.signal<\/code>, kt\u00f3ry umieszczamy w katalogu Data Directory. Zawarto\u015b\u0107 tego pliku jest nieistotna (zwykle tworzymy pusty plik), liczy si\u0119 tylko jego obecno\u015b\u0107 w chwili uruchamiania serwera. Po zako\u0144czeniu procesu odtwarzania, plik recovery.signal<\/code> jest usuwany automatycznie.<\/p>\n\n\n\n

Warto nadmieni\u0107, \u017ce w podobny spos\u00f3b zmodyfikowano mechanizmy replikacji opartej o pliki WAL – tam r\u00f3wnie\u017c parametry konfiguracyjne (m.in. hot_standby<\/code>, primary_conninfo<\/code>, promote_trigger_file<\/code>) umieszczamy teraz w g\u0142\u00f3wnym pliku konfiguracyjnym, a w celu aktywacji trybu replikacji umieszczamy w katalogu Data Directory plik-marker o nazwie standby.signal<\/code>. Plik ten zniknie w chwili promocji serwera Standby  do roli Master. <\/p>\n\n\n\n

Wzmianki na ten temat znajduj\u0105 si\u0119 w oficjalnej dokumentacji: PostgreSQL Documentation<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Pojawienie si\u0119 dwunastej wersji serwera PostgreSQL spowodowa\u0142o konieczno\u015b\u0107 wprowadzenia poprawek do stosowanych przez nas procedur odtwarzania bazy danych po awarii! Przypomnijmy, \u017ce w wersjach PostgreSQL 8, 9, 10, i 11 odtwarzanie bazy danych w oparciu o archiwalne pliki WAL realizowali\u015bmy poprzez utworzenie w katalogu Data Directory pliku o nazwie recovery.conf, a w nim – umieszczenie Read more about PostgreSQL 12 – co si\u0119 sta\u0142o z plikiem recovery.conf?<\/span>[…]<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[38],"tags":[5,39],"yoast_head":"\nPostgreSQL 12 - co si\u0119 sta\u0142o z plikiem recovery.conf? - Explain IT<\/title>\n<meta name=\"description\" content=\"PostgreSQL 12 - co si\u0119 sta\u0142o z plikiem recovery.conf?\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/explainit.pl\/wordpress\/2020\/01\/10\/postgresql-12-co-sie-stalo-z-plikiem-recovery-conf\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PostgreSQL 12 - co si\u0119 sta\u0142o z plikiem recovery.conf? - Explain IT\" \/>\n<meta property=\"og:description\" content=\"PostgreSQL 12 - co si\u0119 sta\u0142o z plikiem recovery.conf?\" \/>\n<meta property=\"og:url\" content=\"https:\/\/explainit.pl\/wordpress\/2020\/01\/10\/postgresql-12-co-sie-stalo-z-plikiem-recovery-conf\/\" \/>\n<meta property=\"og:site_name\" content=\"Explain IT\" \/>\n<meta property=\"article:published_time\" content=\"2020-01-10T14:22:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-07-08T19:26:18+00:00\" \/>\n<meta name=\"author\" content=\"Maciej Zakrzewicz\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napisane przez\" \/>\n\t<meta name=\"twitter:data1\" content=\"Maciej Zakrzewicz\" \/>\n\t<meta name=\"twitter:label2\" content=\"Szacowany czas czytania\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minuta\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/explainit.pl\/wordpress\/2020\/01\/10\/postgresql-12-co-sie-stalo-z-plikiem-recovery-conf\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/explainit.pl\/wordpress\/2020\/01\/10\/postgresql-12-co-sie-stalo-z-plikiem-recovery-conf\/\"},\"author\":{\"name\":\"Maciej Zakrzewicz\",\"@id\":\"https:\/\/explainit.pl\/wordpress\/#\/schema\/person\/740773131bc169a2dc9c0e5e07476219\"},\"headline\":\"PostgreSQL 12 – co si\u0119 sta\u0142o z plikiem recovery.conf?\",\"datePublished\":\"2020-01-10T14:22:00+00:00\",\"dateModified\":\"2020-07-08T19:26:18+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/explainit.pl\/wordpress\/2020\/01\/10\/postgresql-12-co-sie-stalo-z-plikiem-recovery-conf\/\"},\"wordCount\":252,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/explainit.pl\/wordpress\/#organization\"},\"keywords\":[\"awarie\",\"PostgreSQL\"],\"articleSection\":[\"PostgreSQL\"],\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/explainit.pl\/wordpress\/2020\/01\/10\/postgresql-12-co-sie-stalo-z-plikiem-recovery-conf\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/explainit.pl\/wordpress\/2020\/01\/10\/postgresql-12-co-sie-stalo-z-plikiem-recovery-conf\/\",\"url\":\"https:\/\/explainit.pl\/wordpress\/2020\/01\/10\/postgresql-12-co-sie-stalo-z-plikiem-recovery-conf\/\",\"name\":\"PostgreSQL 12 - co si\u0119 sta\u0142o z plikiem recovery.conf? - Explain IT\",\"isPartOf\":{\"@id\":\"https:\/\/explainit.pl\/wordpress\/#website\"},\"datePublished\":\"2020-01-10T14:22:00+00:00\",\"dateModified\":\"2020-07-08T19:26:18+00:00\",\"description\":\"PostgreSQL 12 - co si\u0119 sta\u0142o z plikiem recovery.conf?\",\"breadcrumb\":{\"@id\":\"https:\/\/explainit.pl\/wordpress\/2020\/01\/10\/postgresql-12-co-sie-stalo-z-plikiem-recovery-conf\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/explainit.pl\/wordpress\/2020\/01\/10\/postgresql-12-co-sie-stalo-z-plikiem-recovery-conf\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/explainit.pl\/wordpress\/2020\/01\/10\/postgresql-12-co-sie-stalo-z-plikiem-recovery-conf\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Strona g\u0142\u00f3wna\",\"item\":\"https:\/\/explainit.pl\/wordpress\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"PostgreSQL 12 – co si\u0119 sta\u0142o z plikiem recovery.conf?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/explainit.pl\/wordpress\/#website\",\"url\":\"https:\/\/explainit.pl\/wordpress\/\",\"name\":\"Explain IT\",\"description\":\"Autorska pracownia doradztwa i szkole\u0144 IT - Maciej Zakrzewicz - szkolenia, ekspertyzy, wdro\u017cenia. 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