{"id":1645,"date":"2013-01-11T07:27:58","date_gmt":"2013-01-11T09:27:58","guid":{"rendered":"http:\/\/fabriciolima.net\/blog\/?p=1645"},"modified":"2016-07-23T23:34:27","modified_gmt":"2016-07-24T02:34:27","slug":"database-mirroring-failover-manual-de-varias-bases-ao-mesmo-tempo","status":"publish","type":"post","link":"https:\/\/fabriciolima.net\/blog\/2013\/01\/11\/database-mirroring-failover-manual-de-varias-bases-ao-mesmo-tempo\/","title":{"rendered":"Database Mirroring &#8211; Failover manual de v\u00e1rias bases ao mesmo tempo"},"content":{"rendered":"<p>Ol\u00e1 Pessoal,<\/p>\n<p>Como a solu\u00e7\u00e3o de Database Mirroring do SQL Server \u00e9 em n\u00edvel de database, caso uma database fique indispon\u00edvel, apenas ela sofrer\u00e1 um failover para outra instancia do SQL Server (utilizando o Operation Mode High Safety with Automatic Failover). Entretanto, \u00e9 muito comum existir sistemas que utilizam v\u00e1rias databases ao mesmo tempo, assim, com o failover de apenas uma database, grande parte desses sistemas ficariam indispon\u00edveis.<\/p>\n<p>Para solucionar esse problema, deve-se fazer um Failover Manual das outras databases. Com isso, os sistemas passariam a utilizar a outra instancia do SQL Server que recebeu todo o grupo de databases.<\/p>\n<p>Uma ideia para implementar essa solu\u00e7\u00e3o \u00e9 criar um job que roda a cada X segundos verificando se todas essas databases interligadas pelos sistemas est\u00e3o online, caso uma delas n\u00e3o esteja, um failover manual de todas as outras databases ser\u00e1 realizado.<\/p>\n<p>Segue abaixo um exemplo de script para ser inclu\u00eddo no Job. Nesse caso existem duas databases que precisam ficar na mesma instancia (Mirror1 e Mirror3).<\/p>\n<p>IF (\u00a0\u00a0 \u00a0SELECT COUNT(*)<br \/>\nFROM sys.database_mirroring m<br \/>\nJOIN sys.databases db ON db.database_id = m.database_id<br \/>\nwhere name in (&#8216;Mirror1&#8242;,&#8217;Mirror3&#8217;)<br \/>\nand state_desc = &#8216;ONLINE&#8217;<br \/>\nand mirroring_role_desc = &#8216;PRINCIPAL&#8217;<br \/>\n) &lt; 2<br \/>\nbegin<br \/>\nselect Name<br \/>\ninto #Failover_Databases<br \/>\nFROM sys.database_mirroring m<br \/>\nJOIN sys.databases db ON db.database_id = m.database_id<br \/>\nwhere name in (&#8216;Mirror1&#8242;,&#8217;Mirror3&#8217;)<br \/>\nand state_desc = &#8216;ONLINE&#8217;<br \/>\nand mirroring_role_desc = &#8216;PRINCIPAL&#8217;<\/p>\n<p>declare @name varchar(50),@SQLString nvarchar(500)<\/p>\n<p>while exists (select null from #Failover_Databases)<br \/>\nbegin<\/p>\n<p>select top 1 @name = name from #Failover_Databases<br \/>\nset @SQLString = &#8216;alter database &#8216; + @name + &#8216; set partner failover&#8217;<\/p>\n<p>EXECUTE sp_executesql @SQLString<\/p>\n<p>delete from #Failover_Databases<br \/>\nwhere name = @name<br \/>\nend<\/p>\n<p>end<\/p>\n<p>Dessa forma, caso uma database sofra um Failover Autom\u00e1tico pelo Database Mirroring, a outra database ter\u00e1 um Failover manual executado pela query do Job.<\/p>\n<p>Fica a Dica.<\/p>\n<p>Artigos relacionados:<\/p>\n<p><a href=\"https:\/\/www.fabriciolima.net\/blog\/2012\/05\/15\/serie-de-posts-sobre-database-mirroring\/\" target=\"_blank\">S\u00e9rie de Posts sobre Database Mirroring<\/a><\/p>\n<p><a href=\"https:\/\/www.fabriciolima.net\/blog\/2012\/05\/15\/database-mirroring-como-alterar-o-operation-mode\/\" target=\"_blank\">Database Mirroring \u2013 Como alterar o Operation Mode<\/a><\/p>\n<p><a href=\"https:\/\/www.fabriciolima.net\/blog\/2012\/05\/23\/database-mirroring-testes-operation-mode-high-performance-parte-1\/\" target=\"_blank\">Database Mirroring \u2013 Operation Mode High Performance \u2013 Parte 1<\/a><\/p>\n<p><a href=\"https:\/\/www.fabriciolima.net\/blog\/2012\/05\/28\/database-mirroring-operation-mode-high-performance-parte-2\/\" target=\"_blank\">Database Mirroring \u2013 Operation Mode High Performance \u2013 Parte 2<\/a><\/p>\n<p><a href=\"https:\/\/www.fabriciolima.net\/blog\/2012\/05\/31\/database-mirroring-operation-mode-high-performance-parte-3\/\" target=\"_blank\">Database Mirroring &#8211; Operation Mode High Performance &#8211; Parte 3<\/a><\/p>\n<p><a rel=\"bookmark\" href=\"https:\/\/www.fabriciolima.net\/blog\/2012\/06\/27\/database-mirroring-operation-mode-high-safety-without-failover-parte-1\/\" target=\"_blank\">Database Mirroring \u2013 Operation Mode High Safety Without Failover \u2013  Parte 1<\/a><\/p>\n<p><a rel=\"bookmark\" href=\"https:\/\/www.fabriciolima.net\/blog\/2012\/06\/29\/database-mirroring-operation-mode-high-safety-without-failover-parte-2\/\" target=\"_blank\">Database Mirroring \u2013 Operation Mode High Safety Without Failover \u2013  Parte 2<\/a><\/p>\n<p><a href=\"https:\/\/www.fabriciolima.net\/blog\/2012\/10\/31\/database-mirroring-operation-mode-high-safety-with-automatic-failover\/\" target=\"_blank\">Database Mirroring \u2013 Operation Mode High Safety with Automatic Failover<\/a><\/p>\n<p><a href=\"https:\/\/www.fabriciolima.net\/blog\/2012\/12\/03\/database-mirroring-tempo-failover-hs-with-automatic-failover-com-timeout\/\" target=\"_blank\">Database Mirroring \u2013 Tempo Failover \u2013 HS With Automatic Failover com Timeout<\/a><\/p>\n<p><a href=\"https:\/\/www.fabriciolima.net\/blog\/2013\/01\/01\/database-mirroring-tirando-o-servidor-de-witness-do-mirror-em-caso-de-falha\/\" target=\"_blank\">Database Mirroring \u2013 Tirando o servidor de Witness do Mirror em caso de falha<\/a><\/p>\n<p><b>Gostou desse Post?<\/b><\/p>\n<p>Cadastre seu e-mail para receber novos Posts e curta minha <a href=\"https:\/\/www.facebook.com\/FabricioLimaSolucoesemBancodeDados\/\" target=\"_blank\">P\u00e1gina no Facebook<\/a> para receber Dicas de Leituras e Eventos sobre SQL Server.<\/p>\n<p>Abra\u00e7os,<\/p>\n<p>Fabr\u00edcio Lima<\/p>\n<p>MCITP \u2013 Database Administrator<\/p>\n<p>Consultor e Instrutor SQL Server<\/p>\n<p>Trabalha com SQL Server desde 2006<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ol\u00e1 Pessoal, Como a solu\u00e7\u00e3o de Database Mirroring do SQL Server \u00e9 em n\u00edvel de database, caso uma database fique indispon\u00edvel, apenas ela sofrer\u00e1 um failover para outra instancia do SQL Server (utilizando o Operation Mode High Safety with Automatic Failover). Entretanto, \u00e9 muito comum existir sistemas que utilizam v\u00e1rias databases ao mesmo tempo, assim, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","jetpack_post_was_ever_published":false},"categories":[3,33,280],"tags":[604,606,391,23,607,372,613,611,612,610,608,616,49,33,50,34,605,609,614,615],"class_list":["post-1645","post","type-post","status-publish","format-standard","hentry","category-administracao-de-bd","category-sql-server","category-virtual-pass-br","tag-alta-disponibilidade","tag-database-mirror","tag-database-mirroring","tag-dba","tag-espelhamento-de-banco-de-dados","tag-high-availability","tag-high-performance","tag-high-safety-with-automatic-failover","tag-high-safety-without-automatic-failover","tag-operation-mode","tag-perda-de-dados","tag-safety","tag-sql","tag-sql-server","tag-sql-server-2005","tag-sql-server-2008","tag-sql-server-mirror","tag-sql-server-online","tag-sys-database_mirroring","tag-witness"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.9 - aioseo.com -->\n\t<meta name=\"description\" content=\"Ol\u00e1 Pessoal, Como a solu\u00e7\u00e3o de Database Mirroring do SQL Server \u00e9 em n\u00edvel de database, caso uma database fique indispon\u00edvel, apenas ela sofrer\u00e1 um failover para outra instancia do SQL Server (utilizando o Operation Mode High Safety with Automatic Failover). 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Inst\u00e2ncias participantes dos testes: 1 - Instancia5\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 - Servidor Principal, referenciado no texto por Servidor A 2 - Instancia5\\INST1\u00a0\u00a0\u00a0 -\u2026","rel":"","context":"Em &quot;Administra\u00e7\u00e3o de Banco de Dados&quot;","block_context":{"text":"Administra\u00e7\u00e3o de Banco de Dados","link":"https:\/\/fabriciolima.net\/blog\/category\/sql-server\/administracao-de-bd\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.fabriciolima.net\/blog\/wp-content\/uploads\/2012\/10\/Figura-1.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":1637,"url":"https:\/\/fabriciolima.net\/blog\/2012\/11\/08\/database-mirroring-tempo-failover-hs-without-automatic-failover\/","url_meta":{"origin":1645,"position":1},"title":"Database Mirroring &#8211; Tempo Failover &#8211; HS Without Automatic Failover","author":"Fabr\u00edcio Lima","date":"8 de novembro de 2012","format":false,"excerpt":"Ol\u00e1 Pessoal, A ideia desse teste \u00e9 verificar o tempo que o Database Mirroring leva para fazer um failover manual de um servidor para o outro utilizando esse Operation mode. Inst\u00e2ncias participantes dos testes: 1 - Instancia5\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 - Servidor Principal, referenciado no texto por Servidor A 2 - Instancia5\\INST1\u00a0\u00a0\u00a0 -\u2026","rel":"","context":"Em &quot;Administra\u00e7\u00e3o de Banco de Dados&quot;","block_context":{"text":"Administra\u00e7\u00e3o de Banco de Dados","link":"https:\/\/fabriciolima.net\/blog\/category\/sql-server\/administracao-de-bd\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-14.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":1520,"url":"https:\/\/fabriciolima.net\/blog\/2012\/06\/27\/database-mirroring-operation-mode-high-safety-without-failover-parte-1\/","url_meta":{"origin":1645,"position":2},"title":"Database Mirroring &#8211; Operation Mode High Safety Without Failover &#8211; Parte 1","author":"Fabr\u00edcio Lima","date":"27 de junho de 2012","format":false,"excerpt":"Fala Pessoal, Nesse post come\u00e7o a testar como o Database Mirroring se comporta configurado com o Operation mode High Safety Without Automatic Failover. 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