Sort out common MongoDB operation commands

Sort out common MongoDB operation commands

Mongodb operation commands (note that all commands starting with "db." Must be used to access the specified database before the operation)
Connect to the database:
/Usr/local/mongodb-3.0.4/bin/mongo 192.168.6.118: 30000/admin

Add a partition server:
Db. runCommand ({"addshard": "192.168.6.118: 27017 "})

Set the sharded database:
Db. runCommand ({"enablesharding": "qiaodazhao "})
Db. runCommand ({"enablesharding": "testdb "})

Database usage:
Use qiaodazhao

Set table sharding Based on Field hash:
Sh. shardCollection ("qiaodazhao. resume_meta_data", {_ id: "hashed "})
Sh. shardCollection ("testdb. resumetemp", {_ id: "hashed "})

Set table sharding Based on fields (note that the following two methods work the same ):
Db. runCommand ({"shardcollection": "qiaodazhao. things", "key": {"_ id": 1 }})
Sh. shardCollection ("qiaodazhao. things", {_ id: 1 })

Print the database shard information:
Db. printShardingStatus ()

Print Server Information:
Db. serverStatus ()

Total table data statistics:
Db. table. count ()

Create a table index:
Db. resume_meta_data.ensureIndex ({"org_name": 1 },{ "background": true })

View table indexes:
Db. resume_meta_data.getIndexes ()

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