{"id":7333,"date":"2019-08-05T15:31:51","date_gmt":"2019-08-05T22:31:51","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=7333"},"modified":"2020-01-21T11:32:21","modified_gmt":"2020-01-21T19:32:21","slug":"rebalance-improvements-in-couchbase-server-6-5","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/pt\/rebalance-improvements-in-couchbase-server-6-5\/","title":{"rendered":"Aprimoramentos de rebalanceamento no Couchbase Server 6.5"},"content":{"rendered":"

O rebalanceamento \u00e9 um componente essencial da arquitetura do Couchbase que permite opera\u00e7\u00f5es de gerenciamento de cluster on-line, incluindo adi\u00e7\u00e3o\/remo\u00e7\u00e3o de n\u00f3s, atualiza\u00e7\u00f5es on-line de hardware ou software e recupera\u00e7\u00e3o ap\u00f3s falha de n\u00f3.\u00a0<\/span><\/p>\n

O Couchbase Server 6.5 torna o rebalanceamento mais robusto, mais gerenci\u00e1vel e mais r\u00e1pido. Continue lendo para saber mais sobre todos esses aprimoramentos.<\/span><\/p>\n

Rein\u00edcio autom\u00e1tico do rebalanceamento em caso de falha<\/span><\/h2>\n

O Couchbase, como qualquer sistema distribu\u00eddo, pode sofrer falhas tempor\u00e1rias, como lentid\u00e3o na rede, falha no processo etc., que podem se recuperar automaticamente. Quando essas falhas ocorrem, elas podem fazer com que um rebalanceamento em andamento falhe. Tentar novamente o rebalanceamento com falha \u00e9 geralmente a primeira a\u00e7\u00e3o a que os usu\u00e1rios recorrem, mas isso exige que algu\u00e9m esteja monitorando ativamente o rebalanceamento.\u00a0<\/span><\/p>\n

Agora temos novas tentativas incorporadas para um rebalanceamento com falha, para que voc\u00ea n\u00e3o precise monitor\u00e1-lo e reinici\u00e1-lo manualmente. Voc\u00ea pode configurar o n\u00famero de vezes que deseja tentar novamente, bem como o intervalo de tentativas, para saber quanto tempo deseja esperar antes de reiniciar o rebalanceamento com falha.\u00a0<\/span><\/p>\n

Observa\u00e7\u00e3o: o recurso Retry Rebalance est\u00e1 desativado por padr\u00e3o, portanto, \u00e9 necess\u00e1rio ativ\u00e1-lo explicitamente (veja a captura de tela abaixo).<\/span><\/i><\/p>\n

\"\"<\/p>\n

Quando uma nova tentativa de rebalanceamento estiver pendente, a interface do usu\u00e1rio exibir\u00e1 um banner informando isso. Ela fornecer\u00e1 uma op\u00e7\u00e3o para cancelar a nova tentativa, se voc\u00ea quiser. <\/span>O rebalanceamento n\u00e3o ser\u00e1 repetido automaticamente em algumas condi\u00e7\u00f5es, por exemplo, se tiver sido abortado pelo failover autom\u00e1tico ou explicitamente abortado pelo usu\u00e1rio.<\/span><\/p>\n

Auto-failover durante o rebalanceamento<\/span><\/h2>\n

O rebalanceamento pode levar algum tempo e \u00e9 poss\u00edvel que um n\u00f3 do cluster (envolvido ou n\u00e3o no rebalanceamento) tenha falhado. Em tal situa\u00e7\u00e3o, o n\u00f3 precisa passar por uma falha para promover suas r\u00e9plicas e manter a disponibilidade do acesso aos dados. O gerenciador de cluster do Couchbase agora abortar\u00e1 um rebalanceamento em andamento para prosseguir com esse failover autom\u00e1tico. Isso garante que a disponibilidade seja restaurada rapidamente, de acordo com os rigorosos SLAs de tempo de atividade que os aplicativos esperam do Couchbase.\u00a0<\/span><\/p>\n

Esse comportamento est\u00e1 ativado por padr\u00e3o, como voc\u00ea pode ver na captura de tela acima. Se, por algum motivo, voc\u00ea desejar desativ\u00e1-lo, isso pode ser feito.<\/span><\/p>\n

Tamb\u00e9m queremos reiniciar automaticamente o rebalanceamento ap\u00f3s o auto-failover... mas esse \u00e9 um aprimoramento a ser buscado em uma vers\u00e3o futura.<\/span><\/p>\n

Monitoramento do progresso do reequil\u00edbrio<\/span><\/h2>\n

Quando voc\u00ea inicia o rebalanceamento em um cluster do Couchbase, ele rebalanceia todos os servi\u00e7os, incluindo o Data Service, o Index Service, o Query Service, o Search, o Eventing e o Analytics. O rebalanceamento de cada <\/span>O servi\u00e7o em si envolve muitas etapas diferentes, sendo o Data Service a mais complexa e, geralmente, a parte mais longa do rebalanceamento. O rebalanceamento do Data Service processa um bucket por vez e, para cada bucket, processa v\u00e1rios vbuckets simultaneamente.<\/span><\/p>\n

\u00a0<\/span>Quando um rebalanceamento estiver ocorrendo sem problemas, o administrador n\u00e3o precisar\u00e1 monitorar e observar o que est\u00e1 acontecendo (a menos que realmente queira). No entanto, se as coisas parecerem travadas ou lentas, ter visibilidade dos est\u00e1gios de rebalanceamento acima \u00e9 muito \u00fatil para descobrir que trabalho foi conclu\u00eddo, que trabalho est\u00e1 em andamento e que trabalho resta.\u00a0<\/span><\/p>\n

\u00a0<\/span>A nova IU de monitoramento de rebalanceamento imita a hierarquia acima de Servi\u00e7os, Compartimentos e Est\u00e1gios, al\u00e9m de exibir quanto do rebalanceamento de cada compartimento foi conclu\u00eddo (veja a captura de tela abaixo).\u00a0<\/span><\/p>\n

\"\"<\/p>\n

Relat\u00f3rio de rebalanceamento<\/span><\/h2>\n

Agora voc\u00ea pode obter um relat\u00f3rio do \u00faltimo rebalanceamento por meio da API REST, por exemplo<\/span><\/p>\n

curl -X GET -u Administrador:senha <\/span>https:\/\/localhost:8091\/logs\/rebalanceReport<\/span><\/a><\/p>\n

Al\u00e9m das informa\u00e7\u00f5es exibidas na interface do usu\u00e1rio, o relat\u00f3rio mostra a hora de in\u00edcio e de t\u00e9rmino de cada um dos quatro est\u00e1gios (backfill, move, persistence e takeover) para cada vbucket.<\/span><\/p>\n

\"\"<\/p>\n

Rebalanceamento mais r\u00e1pido<\/span><\/h2>\n

O Rebalance processa v\u00e1rios vbuckets simultaneamente e cada vbucket tem muitas fases internas durante o rebalanceamento - uma das principais fases \u00e9 <\/span>preenchimento<\/span><\/i> onde ocorre a maior parte da c\u00f3pia de dados. O backfill costuma ser a fase mais longa em um rebalanceamento. A fase de backfill do rebalanceamento agora tem um mecanismo de controle de fluxo melhor. O gerenciador de cluster controla quantos backfills est\u00e3o em andamento em um n\u00f3 e garante que os backfills anteriores terminem a persist\u00eancia no disco antes que novos sejam iniciados.<\/span><\/p>\n

Em nossos testes internos, observamos uma melhoria de desempenho muito promissora com esse novo mecanismo de controle de fluxo, especialmente para conjuntos de dados maiores. Isso tamb\u00e9m resulta em menor impacto para o aplicativo front-end como resultado de filas de grava\u00e7\u00e3o em disco menores e menor press\u00e3o de mem\u00f3ria.\u00a0<\/span><\/p>\n

Pr\u00f3ximas etapas<\/span><\/h2>\n

Gostar\u00edamos de ouvir seus coment\u00e1rios sobre essas melhorias do Rebalance. Aqui est\u00e3o alguns recursos para voc\u00ea come\u00e7ar:<\/span><\/p>\n

Baixar<\/em><\/strong><\/p>\n

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

Documenta\u00e7\u00e3o<\/em><\/strong><\/p>\n

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

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

Blogs <\/em><\/strong><\/p>\n

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

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

Rebalance is a critical component of Couchbase architecture that allows for online cluster management operations including adding\/removing nodes, online upgrades of hardware or software, and recovery after node failure.\u00a0 Couchbase Server 6.5 makes rebalance more robust, more manageable, and faster. […]<\/p>","protected":false},"author":31463,"featured_media":5929,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1821,1816,2334],"tags":[2378],"ppma_author":[9079],"class_list":["post-7333","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-couchbase-architecture","category-couchbase-server","category-monitoring","tag-6-5"],"acf":[],"yoast_head":"\nRebalance Improvements in Couchbase Server 6.5 - The Couchbase Blog<\/title>\n<meta name=\"description\" content=\"Couchbase Server 6.5 makes rebalance more robust, more manageable, and faster.\" \/>\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\/rebalance-improvements-in-couchbase-server-6-5\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Rebalance Improvements in Couchbase Server 6.5\" \/>\n<meta property=\"og:description\" content=\"Couchbase Server 6.5 makes rebalance more robust, more manageable, and faster.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.couchbase.com\/blog\/pt\/rebalance-improvements-in-couchbase-server-6-5\/\" \/>\n<meta property=\"og:site_name\" content=\"The Couchbase Blog\" \/>\n<meta property=\"article:published_time\" content=\"2019-08-05T22:31:51+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-01-21T19:32:21+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2018\/10\/GettyImages-598530576-e1540932605247.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"624\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Shivani Gupta\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Shivani Gupta\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.couchbase.com\/blog\/rebalance-improvements-in-couchbase-server-6-5\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.couchbase.com\/blog\/rebalance-improvements-in-couchbase-server-6-5\/\"},\"author\":{\"name\":\"Shivani Gupta\",\"@id\":\"https:\/\/www.couchbase.com\/blog\/#\/schema\/person\/1015706fa52f49e2e4ab139abda363b1\"},\"headline\":\"Rebalance Improvements in Couchbase Server 6.5\",\"datePublished\":\"2019-08-05T22:31:51+00:00\",\"dateModified\":\"2020-01-21T19:32:21+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.couchbase.com\/blog\/rebalance-improvements-in-couchbase-server-6-5\/\"},\"wordCount\":766,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.couchbase.com\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.couchbase.com\/blog\/rebalance-improvements-in-couchbase-server-6-5\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2018\/10\/GettyImages-598530576-e1540932605247.jpg\",\"keywords\":[\"6.5\"],\"articleSection\":[\"Couchbase Architecture\",\"Couchbase Server\",\"Monitoring\"],\"inLanguage\":\"pt-BR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.couchbase.com\/blog\/rebalance-improvements-in-couchbase-server-6-5\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.couchbase.com\/blog\/rebalance-improvements-in-couchbase-server-6-5\/\",\"url\":\"https:\/\/www.couchbase.com\/blog\/rebalance-improvements-in-couchbase-server-6-5\/\",\"name\":\"Rebalance Improvements in Couchbase Server 6.5 - 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