Replica Set Maintenance Tutorials副本集维护教程

The following tutorials provide information in maintaining existing replica sets.以下教程提供了维护现有副本集的信息。

Change the Size of the Oplog更改Oplog的大小

Increase the size of the oplog which logs operations. 增加记录操作的oplog的大小。In most cases, the default oplog size is sufficient.在大多数情况下，默认的oplog大小就足够了。

Perform Maintenance on Replica Set Members对副本集成员执行维护

Perform maintenance on a member of a replica set while minimizing downtime.对副本集的成员执行维护，同时将停机时间降至最低。

Force a Member to Become Primary强制成员成为主要成员

Force a replica set member to become primary.强制副本集成员成为主要成员。

Resync a Member of a Replica Set重新同步副本集的成员

Sync the data on a member. 同步成员上的数据。Either perform initial sync on a new member or resync the data on an existing member that has fallen too far behind to catch up by way of normal replication.在新成员上执行初始同步，或者在现有成员上重新同步数据，该成员已落后太多，无法通过正常复制方式赶上。

Configure Replica Set Tag Sets配置副本集标记集

Assign tags to replica set members for use in targeting read and write operations to specific members.将标记分配给副本集成员，以用于将读写操作定向到特定成员。

Reconfigure a Replica Set with Unavailable Members使用不可用的成员重新配置副本集

Reconfigure a replica set when a majority of replica set members are down or unreachable.当大多数副本集成员关闭或无法访问时，重新配置副本集。

Manage Chained Replication管理链接复制

Disable or enable chained replication. 禁用或启用链式复制。Chained replication occurs when a secondary replicates from another secondary instead of the primary.当辅助服务器从另一个辅助服务器而不是主服务器进行复制时，会发生链式复制。

Change Hostnames in a Replica Set更改副本集中的主机名

Update the replica set configuration to reflect changes in members' hostnames.更新副本集配置以反映成员主机名的更改。

Configure a Secondary's Sync Target配置辅助设备的同步目标

Specify the member that a secondary member synchronizes from.指定辅助成员从中同步的成员。

Rename a Replica Set重命名副本集

Rename an unsharded replica set.重命名未排序的副本集。

Modify PSA Replica Set Safely安全地修改PSA副本集

Safely perform some reconfiguration changes on a primary-secondary-arbiter (PSA) replica set or on a replica set that is changing to a PSA architecture.在主辅助仲裁器（PSA）副本集或正在更改为PSA架构的副本集上安全地执行一些重新配置更改。

Mitigate Performance Issues with PSA Replica Set使用PSA副本集缓解性能问题

Reduce cache pressure and increased write traffic for a deployment that has a three-member primary-secondary-arbiter (PSA) architecture.对于具有三成员主辅助仲裁器（PSA）体系结构的部署，减少缓存压力并增加写入流量。