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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276
第 17章
分片管理
与副本集一样，分片集群的管理同样有很多选择，手动管理是其中一种。而现在，使用
Ops Manager
、
Cloud
Manager
以及
Atlas
的数据库即服务（
DBaaS
）等工具来进行全集群管
理变得越来越普遍。本章展示如何手动管理分片集群，包括以下几项内容。
•
检查集群状态：集群有哪些成员？数据保存在哪里？哪些连接是打开的？
•
添加、删除及修改集群的成员。
•
管理数据移动和手动移动数据。
17.1
查看当前状态
有一些辅助函数可以用于了解数据的位置、分片信息以及集群的当前操作。
17.1.1
使用
sh.status()
查看摘要信息
sh.status()
提供了分片、数据库以及分片集合的概要信息。如果数据块的数量不多，那
么它还会打印出块的位置。否则，它只会简单地给出集合的片键，并报告每个分片中块的
数量：
> sh.status()
--- Sharding Status ---
sharding version: {
"_id" : 1,
"minCompatibleVersion" : 5,
"currentVersion" : 6,
"clusterId" : ObjectId("5bdf51ecf8c192ed922f3160")
}
shards:
分片管理 ...
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