mongodb副本集/分片日常维护

环境:

OS:Centos 7

mongodb:4.4.22

 

1.mongodb删除从节点
rs.remove("192.168.1.108:29001")

 

2.删除仲裁节点,命令与删除从节点一致
rs.remove("192.168.1.106:29001");

 

3.查看表是否分片

##有分片
mongos> db.app_message_all.getShardDistribution()

Shard s1 at s1/192.168.1.105:29001
 data : 570.81MiB docs : 666693 chunks : 8
 estimated data per chunk : 71.35MiB
 estimated docs per chunk : 83336

Shard s2 at s2/192.168.1.106:29002
 data : 571.65MiB docs : 667673 chunks : 8
 estimated data per chunk : 71.45MiB
 estimated docs per chunk : 83459

Shard s3 at s3/192.168.1.107:29003
 data : 569.9MiB docs : 665634 chunks : 8
 estimated data per chunk : 71.23MiB
 estimated docs per chunk : 83204

Totals
 data : 1.67GiB docs : 2000000 chunks : 24
 Shard s1 contains 33.33% data, 33.33% docs in cluster, avg obj size on shard : 897B
 Shard s2 contains 33.38% data, 33.38% docs in cluster, avg obj size on shard : 897B
 Shard s3 contains 33.28% data, 33.28% docs in cluster, avg obj size on shard : 897B


##没有分片
mongos> db.app_message_nofenpian.getShardDistribution()
Collection db_pushmsg.app_message_nofenpian is not sharded.