From 274f7b6c627a08450b2a5bc6a30d8a00caefbe9a Mon Sep 17 00:00:00 2001 From: wu xiangkai Date: Fri, 17 Oct 2025 15:43:56 +0800 Subject: [PATCH] =?UTF-8?q?doc:=20=E9=98=85=E8=AF=BBmysql=20group=20replic?= =?UTF-8?q?ation=E6=96=87=E6=A1=A3?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- mysql/mysql集群/Mysql Group Replication.md | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/mysql/mysql集群/Mysql Group Replication.md b/mysql/mysql集群/Mysql Group Replication.md index 5571fc8..69c14a4 100644 --- a/mysql/mysql集群/Mysql Group Replication.md +++ b/mysql/mysql集群/Mysql Group Replication.md @@ -16,6 +16,7 @@ - [Version Compatibility](#version-compatibility) - [Group Membership](#group-membership) - [group\_replication\_member\_expel\_timeout](#group_replication_member_expel_timeout) + - [Failure detection](#failure-detection) # Mysql Group Replication @@ -240,4 +241,5 @@ group members不仅需要对事务的提交达成一致，也需要对当前的v ##### group_replication_member_expel_timeout 通过`group_replication_member_expel_timeout`的system variable，引入了一个waiting period，允许members该时间内重新连接到group，从而避免被从group中驱逐。如果member在该时间范围内重新连接到了group，那么该member可以重新在group中处于活跃状态。但是，当member超过expel timeout并且从group中被驱逐时，或通过`STOP GROUP_REPLICATION`语句停止group replication时，或server failure时，其必须作为新的实例加入到group中。 - +### Failure detection +group replication failure detection mechanism是一个分布式的service，用于检测group中server没有和其他servers沟通的情况，从而判定该server有停止服务的嫌疑。如果在group的共识中该嫌疑为true，那么group将会做出协调一致的决定，将该member逐出group。 \ No newline at end of file