November 2021
Intermediate to advanced
410 pages
12h 1m
Chinese
Content preview from MongoDB权威指南（第3版）
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管理
｜
227
"force"
选项对其进行重新配置：
> rs.reconfig(config, {"force" : true})
强制重新配置与普通的重新配置遵循相同的规则：必须使用正确的选项，将有效且格式完
好的配置发送给成员。
"force"
选项不允许无效的配置，它的作用只是让从节点接受重新
配置命令。
强制重新配置会使副本集
"version"
字段的数字显著增加。你可能会看到它猛增了数万或
数十万。这些都是正常的：这是为了防止版本号冲突（以防网络分区的两边都在进行重新
配置）。
当从节点接收到重新配置时，它会更新自身的配置并将新配置传递给其他成员。副本集的
其他成员只有在识别出配置的发送者为当前配置中的一员时，才会对配置的更改有所察
觉。因此，如果一些成员已经改变了主机名，则应该在一个保持着旧主机名的成员上进行
强制重新配置。如果每个成员都有一个新的主机名，则应该关闭副本集中的每个成员，在
单机模式下启动，手动更改
local.system.replset
文档，然后重新启动成员。
13.3
控制成员状态
有多种方式可以手动更改成员的状态以进行维护或应对负载的变化。但需要注意，无法强
制一个成员成为主节点，只能对副本集进行适当的配置，即为副本集成员设置高于任何其
他成员的优先级。
13.3.1
把主节点变为从节点
可以使用
stepDown
函数将主节点降级为从节点：
> rs.stepDown()
这会使主节点降级为
SECONDARY
状态并维持
60
秒。如果在这段时间内没有其他主节点被选
举出来，那么这个节点可以尝试重新进行选举 ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.