{"id":7340,"date":"2019-08-09T10:00:52","date_gmt":"2019-08-09T17:00:52","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=7340"},"modified":"2025-06-13T20:46:20","modified_gmt":"2025-06-14T03:46:20","slug":"exercising-control-on-quality-of-service-using-xdcr","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/pt\/exercising-control-on-quality-of-service-using-xdcr\/","title":{"rendered":"Exerc\u00edcio de controle sobre a qualidade do servi\u00e7o usando o XDCR"},"content":{"rendered":"

XDCR<\/a>O sistema de replica\u00e7\u00e3o de dados, por padr\u00e3o, oferece aos clientes a flexibilidade de ajustar o n\u00famero de replica\u00e7\u00f5es para um determinado bucket, dependendo do desempenho desejado. <\/span>A nova replica\u00e7\u00e3o exige o streaming de todos os documentos existentes no bucket e, portanto, apresenta uma taxa de muta\u00e7\u00e3o mais alta do que as muta\u00e7\u00f5es cont\u00ednuas. Dessa forma, a nova replica\u00e7\u00e3o usa mais recursos, o que <\/span>\u00e0s vezes afetava negativamente o rendimento das replica\u00e7\u00f5es existentes nesse meio tempo. Com nossa pr\u00f3xima vers\u00e3o 6.5, XDCR<\/a> fornecer\u00e1 aos usu\u00e1rios a capacidade de priorizar as replica\u00e7\u00f5es em andamento em rela\u00e7\u00e3o \u00e0s replica\u00e7\u00f5es iniciais. A aloca\u00e7\u00e3o de recursos ocorrer\u00e1 com base na prioridade especificada.\u00a0<\/span><\/p>\n

Ao criar uma nova replica\u00e7\u00e3o, o cliente tem a op\u00e7\u00e3o de atribuir prioridades ao fluxo de replica\u00e7\u00e3o. As op\u00e7\u00f5es fornecidas seriam ALTA, M\u00c9DIA ou BAIXA.\u00a0<\/span><\/p>\n

Para nossa compreens\u00e3o, vamos supor que as r\u00e9plicas em andamento sejam ALTAS e considerar os cen\u00e1rios mencionados abaixo para novas r\u00e9plicas:<\/span><\/p>\n

ALTO :<\/span><\/p>\n

A aloca\u00e7\u00e3o m\u00e1xima de recursos seria fornecida a essa nova replica\u00e7\u00e3o durante o est\u00e1gio inicial de backfill (at\u00e9 que todas as muta\u00e7\u00f5es no bucket de origem sejam replicadas para o bucket de destino). Isso pode ter algum impacto negativo no desempenho das replica\u00e7\u00f5es existentes.\u00a0<\/span><\/p>\n

Isso pode ser extremamente \u00fatil na distribui\u00e7\u00e3o de cargas de trabalho e em casos de uso de localidade de dados em que os clientes desejam adicionar um novo cluster \u00e0 topologia, coloc\u00e1-lo em funcionamento imediatamente e garantir a consist\u00eancia entre os clusters o mais r\u00e1pido poss\u00edvel.\u00a0\u00a0<\/span><\/p>\n

Esse \u00e9 o comportamento atual do XDCR e tamb\u00e9m ser\u00e1 a configura\u00e7\u00e3o padr\u00e3o.<\/span><\/p>\n

M\u00c9DIO :<\/span><\/p>\n

A nova replica\u00e7\u00e3o receber\u00e1 recursos m\u00ednimos durante o est\u00e1gio de backfill para se equiparar lentamente \u00e0s replica\u00e7\u00f5es em andamento. Assim que a replica\u00e7\u00e3o estiver totalmente recuperada, a prioridade desse fluxo de replica\u00e7\u00e3o ser\u00e1 automaticamente alterada para ALTA e a distribui\u00e7\u00e3o de recursos ser\u00e1 uniforme em todas as replica\u00e7\u00f5es ALTAS.\u00a0<\/span><\/p>\n

Essa \u00e9 uma configura\u00e7\u00e3o \u00fatil para casos de uso de alta disponibilidade e recupera\u00e7\u00e3o de desastres. Quando um cliente n\u00e3o quer causar nenhum impacto negativo nos clusters existentes e pode se dar ao luxo de esperar que um novo cluster seja recuperado, essa \u00e9 a configura\u00e7\u00e3o perfeita.\u00a0<\/span><\/p>\n

BAIXO :<\/span><\/p>\n

A nova replica\u00e7\u00e3o receber\u00e1 recursos m\u00ednimos durante todo o processo de replica\u00e7\u00e3o. Durante a replica\u00e7\u00e3o inicial e durante os est\u00e1gios de replica\u00e7\u00e3o em andamento, esse fluxo ter\u00e1 prioridade mais baixa.<\/span><\/p>\n

Essa \u00e9 uma configura\u00e7\u00e3o \u00fatil quando um cliente deseja configurar um cluster hot e cold, no qual ele pode permitir um desempenho de replica\u00e7\u00e3o lento para o cluster cold com aloca\u00e7\u00e3o m\u00ednima de recursos.\u00a0<\/span><\/p>\n

Para os usu\u00e1rios do XDCR, h\u00e1 apenas uma altera\u00e7\u00e3o vis\u00edvel:<\/span><\/p>\n

Uma nova configura\u00e7\u00e3o de replica\u00e7\u00e3o, \"Prioridade\", ser\u00e1 adicionada \u00e0s exibi\u00e7\u00f5es de cria\u00e7\u00e3o e edi\u00e7\u00e3o de replica\u00e7\u00e3o. Ela ter\u00e1 tr\u00eas valores poss\u00edveis, Alto\/M\u00e9dio\/Baixo.<\/span><\/p>\n

\"\"<\/p>\n

Como o desempenho da replica\u00e7\u00e3o depende muito da largura de banda da rede e da CPU alocada, os clientes podem alocar as prioridades de acordo com a import\u00e2ncia da necessidade comercial e economizar recursos. A utiliza\u00e7\u00e3o eficaz dessa funcionalidade, atribuindo prioridades com base na necessidade comercial, pode levar \u00e0 redu\u00e7\u00e3o do custo de propriedade, especialmente para implementa\u00e7\u00f5es em nuvem.\u00a0<\/span><\/p>\n

As atualiza\u00e7\u00f5es do gerenciamento de recursos por meio da atribui\u00e7\u00e3o de prioridades s\u00e3o totalmente opcionais. Elas podem ser modificadas a qualquer momento no futuro, sem nenhum impacto negativo, como reinicializa\u00e7\u00f5es de replica\u00e7\u00e3o.<\/span><\/p>\n

A prioriza\u00e7\u00e3o da replica\u00e7\u00e3o oferece aos clientes um controle aprimorado sobre o gerenciamento de recursos. Esse recurso melhora o comportamento geral de replica\u00e7\u00e3o do XDCR, pois podemos optar por n\u00e3o causar nenhum impacto nas replica\u00e7\u00f5es em andamento devido \u00e0s replica\u00e7\u00f5es rec\u00e9m-criadas.\u00a0<\/span><\/p>\n

Todas essas altera\u00e7\u00f5es tamb\u00e9m podem ser feitas por meio da API CLI\/REST. Para obter mais detalhes, leia a documenta\u00e7\u00e3o.<\/span><\/p>\n

Compartilhe sua experi\u00eancia de uso desse recurso por meio de coment\u00e1rios ou em nosso f\u00f3rum.\u00a0\u00a0<\/span><\/p>\n

Recursos<\/b><\/p>\n

Baixar<\/i><\/p>\n

Fa\u00e7a o download do Couchbase Server 6.5<\/a><\/span><\/p>\n

\u00a0<\/i>Documenta\u00e7\u00e3o<\/i><\/p>\n

Notas de vers\u00e3o do Couchbase Server 6.5<\/a><\/span><\/p>\n

Couchbase Server 6.5 O que h\u00e1 de novo<\/a><\/span><\/p>\n

Blogs<\/i><\/p>\n

Blog: Anunciando o Couchbase Server 6.5 GA - O que h\u00e1 de novo e aprimorado<\/a><\/span><\/p>\n

Blog: O Couchbase traz as transa\u00e7\u00f5es ACID multi-documento distribu\u00eddas para o NoSQL<\/a><\/span><\/p>\n

Todos os blogs 6.5<\/b><\/a><\/span><\/p>","protected":false},"excerpt":{"rendered":"

XDCR, by design, provides customers the flexibility to tune the number of replications for a given bucket depending on the desired performance. New replication requires streaming all existing documents in the bucket, and, therefore, it exhibits a higher mutation rate […]<\/p>","protected":false},"author":6588,"featured_media":11844,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1814,1815,1821,2225,1816,9415],"tags":[1952,2127,2126],"ppma_author":[9064],"class_list":["post-7340","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-application-design","category-best-practices-and-tutorials","category-couchbase-architecture","category-cloud","category-couchbase-server","category-xdcr","tag-data-replication","tag-disaster-recovery","tag-high-availability"],"acf":[],"yoast_head":"\nExercising Control on Quality of Service Using XDCR - The Couchbase Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.couchbase.com\/blog\/pt\/exercising-control-on-quality-of-service-using-xdcr\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Exercising Control on Quality of Service Using XDCR\" \/>\n<meta property=\"og:description\" content=\"XDCR, by design, provides customers the flexibility to tune the number of replications for a given bucket depending on the desired performance. 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