{"id":1637,"date":"2012-11-08T21:10:14","date_gmt":"2012-11-08T23:10:14","guid":{"rendered":"http:\/\/fabriciolima.net\/blog\/?p=1637"},"modified":"2016-07-24T10:28:23","modified_gmt":"2016-07-24T13:28:23","slug":"database-mirroring-tempo-failover-hs-without-automatic-failover","status":"publish","type":"post","link":"https:\/\/fabriciolima.net\/blog\/2012\/11\/08\/database-mirroring-tempo-failover-hs-without-automatic-failover\/","title":{"rendered":"Database Mirroring &#8211; Tempo Failover &#8211; HS Without Automatic Failover"},"content":{"rendered":"<p>Ol\u00e1 Pessoal,<\/p>\n<p>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.<\/p>\n<p>Inst\u00e2ncias participantes dos testes:<\/p>\n<p>1 &#8211; Instancia5\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 &#8211; Servidor Principal, referenciado no texto por Servidor A<br \/>\n2 &#8211; Instancia5\\INST1\u00a0\u00a0\u00a0 &#8211; Servidor Mirror, referenciado no texto por Servidor B<\/p>\n<p>Nome da database espelhada: Mirror1<\/p>\n<p>Script de cria\u00e7\u00e3o da tabela Teste:<\/p>\n<p>CREATE TABLE [dbo].[Teste](<br \/>\n[Cod] [int] IDENTITY(1,1) NOT NULL,<br \/>\n[Data] [datetime] NULL,<br \/>\n[Texto] [varchar](4000) NULL)<\/p>\n<p>Loop de insert do teste:<br \/>\nwhile 1=1<br \/>\nbegin<br \/>\nif exists (select null<br \/>\nfrom sys.databases<br \/>\nwhere name = &#8216;MIRROR1&#8217; and state_desc = &#8216;ONLINE&#8217;)<br \/>\ninsert into mirror1..Teste(texto)<br \/>\nselect @@servername<br \/>\nend<\/p>\n<p>Com um database mirroring configurado com o modo High Safety without Automatic Failover conforme pode ser visto abaixo:<\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-14.png\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1920\" title=\"Figura 1\" src=\"https:\/\/www.fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-14.png\" alt=\"\" width=\"493\" height=\"359\" srcset=\"https:\/\/fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-14.png 577w, https:\/\/fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-14-300x219.png 300w, https:\/\/fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-14-410x299.png 410w, https:\/\/fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-14-100x73.png 100w, https:\/\/fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-14-275x201.png 275w, https:\/\/fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-14-20x15.png 20w\" sizes=\"auto, (max-width: 493px) 100vw, 493px\" \/><\/a><\/p>\n<p>Foram executadas cinco queries com loops infinitos de Inserts.<\/p>\n<p>Em seguida foi feito o failover manual do servidor A para o Servidor B com o comando abaixo:<\/p>\n<p>ALTER DATABASE mirror1 set partner failover<\/p>\n<p>Como a query do loop possui uma verifica\u00e7\u00e3o que s\u00f3 realiza o insert quando a database est\u00e1 ONLINE, esse loop tamb\u00e9m ficou sendo executado no servidor B para que assim que a database ficasse online, um insert fosse feito nessa tabela.<\/p>\n<p>Assim, como a coluna Texto possui o nome do servidor onde o insert foi executado, \u00e9 poss\u00edvel medir o tempo de failover entre as duas instancias. Para isso, foi verificado quando a coluna Texto troca o nome do servidor e com isso \u00e9 poss\u00edvel saber a \u00faltima inser\u00e7\u00e3o em um ambiente e a primeira inser\u00e7\u00e3o em outro ambiente.<\/p>\n<p>Segue o resultado encontrado:<\/p>\n<p><a href=\"https:\/\/www.fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-23.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1921\" title=\"Figura 2\" src=\"https:\/\/www.fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-23.png\" alt=\"\" width=\"584\" height=\"157\" srcset=\"https:\/\/fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-23.png 643w, https:\/\/fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-23-300x81.png 300w, https:\/\/fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-23-410x111.png 410w, https:\/\/fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-23-100x27.png 100w, https:\/\/fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-23-275x74.png 275w, https:\/\/fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-23-20x5.png 20w\" sizes=\"auto, (max-width: 584px) 100vw, 584px\" \/><\/a><\/p>\n<p>Comparando as duas colunas do tipo datetime, temos que o tempo do failover manual foi de <strong>4.1 segundos<\/strong>.<\/p>\n<p>Conclus\u00e3o: Essa op\u00e7\u00e3o de realizar um FAILOVER MANUAL \u00e9 bem interessante para a instala\u00e7\u00e3o de Hotfix e Services Packs nos servidores, pois pode diminuir o tempo de indisponibilidade dos sistemas enquanto um Service Pack est\u00e1 sendo instalado.<br \/>\nEx.: Da ultima vez que fui instalar o SP3 do SQL Server 2005 em um servidor de produ\u00e7\u00e3o eu demorei 30 minutos incluindo o boot.<\/p>\n<p>At\u00e9 o pr\u00f3ximo Post.<\/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><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, 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 &#8211; Instancia5\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 &#8211; Servidor Principal, referenciado no texto por Servidor A 2 &#8211; Instancia5\\INST1\u00a0\u00a0\u00a0 &#8211; Servidor Mirror, referenciado no texto [&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":[3,280],"tags":[604,606,391,23,607,372,613,611,612,610,608,616,49,33,50,34,605,609,614,615],"class_list":["post-1637","post","type-post","status-publish","format-standard","hentry","category-administracao-de-bd","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, 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. 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Em\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-1.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-1.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-1.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.fabriciolima.net\/blog\/wp-content\/uploads\/2012\/11\/Figura-1.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":1596,"url":"https:\/\/fabriciolima.net\/blog\/2012\/07\/16\/database-mirroring-error-the-command-failed-because-the-database-mirror-is-busy\/","url_meta":{"origin":1637,"position":4},"title":"Database Mirroring &#8211; Error: The Command Failed Because The Database Mirror Is Busy","author":"Fabr\u00edcio Lima","date":"16 de julho de 2012","format":false,"excerpt":"Fala Pessoal, Nesse post vou compartilhar com voc\u00eas um erro que encontrei em um dos meus testes com Database Mirroring. Instancias participantes dos testes: 1 - Instancia5\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 - Servidor Principal que chamarei de Servidor A 2 - Instancia5\\INST1\u00a0\u00a0\u00a0 - Servidor Mirror que chamarei de Servidor B Nome da database espelhada:\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\/07\/Figura-1.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":1594,"url":"https:\/\/fabriciolima.net\/blog\/2012\/07\/18\/database-mirroring-operation-mode-high-safety-without-failover-parte-3\/","url_meta":{"origin":1637,"position":5},"title":"Database Mirroring &#8211; Operation Mode High Safety Without Failover &#8211; Parte 3","author":"Fabr\u00edcio Lima","date":"18 de julho de 2012","format":false,"excerpt":"Fala Pessoal, Neste post continuarei com o teste do Operation Mode High Safety Without Automatic Failover. Caso ainda n\u00e3o tenham visto os posts anteriores, sugiro que os leia antes de continuar: Database Mirroring \u2013 Operation Mode High Safety Without Failover \u2013 Parte 1 Database Mirroring \u2013 Operation Mode High Safety\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\/07\/Figura-11.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/fabriciolima.net\/blog\/wp-json\/wp\/v2\/posts\/1637","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fabriciolima.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fabriciolima.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fabriciolima.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fabriciolima.net\/blog\/wp-json\/wp\/v2\/comments?post=1637"}],"version-history":[{"count":0,"href":"https:\/\/fabriciolima.net\/blog\/wp-json\/wp\/v2\/posts\/1637\/revisions"}],"wp:attachment":[{"href":"https:\/\/fabriciolima.net\/blog\/wp-json\/wp\/v2\/media?parent=1637"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fabriciolima.net\/blog\/wp-json\/wp\/v2\/categories?post=1637"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fabriciolima.net\/blog\/wp-json\/wp\/v2\/tags?post=1637"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}