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本文主要介绍一下如何使用mongo shell连接远程数据库
install
curl -o mongodb-linux-x86_64-3.2.4.tgz https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-3.2.4.tgz
tar -xvf mongodb-linux-x86_64-3.2.4.tgz
这个里头的bin就包含了mongo
shell
mongo mydb --username user1 --host 192.168.99.100 --port 27017 --password
--password后面不传参数,则会在命令行提示输入
查看空间占用
mydb:PRIMARY> db.stats()
{
"db" : "mydb",
"collections" : 7,
"objects" : 5762090,
"avgObjSize" : 437.28749533589377,
"dataSize" : 2519689904, //所有数据的总大小
"storageSize" : 1816985600, //所有数据占的磁盘大小
"numExtents" : 0,
"indexes" : 10,
"indexSize" : 84381696,
"ok" : 1
}
db.stats(1073741824);以G为单位 db.stats(1024)以kb为单位
查看集合
db.getCollectionNames()
查询
mydb:PRIMARY> db.mylog.find({"user_id":"12345"}).count()
help
mydb:PRIMARY> db.help()
DB methods:
db.adminCommand(nameOrDocument) - switches to 'admin' db, and runs command [ just calls db.runCommand(...) ]
db.auth(username, password)
db.cloneDatabase(fromhost)
db.commandHelp(name) returns the help for the command
db.copyDatabase(fromdb, todb, fromhost)
db.createCollection(name, { size : ..., capped : ..., max : ... } )
db.createUser(userDocument)
db.currentOp() displays currently executing operations in the db
db.dropDatabase()
db.eval() - deprecated
db.fsyncLock() flush data to disk and lock server for backups
db.fsyncUnlock() unlocks server following a db.fsyncLock()
db.getCollection(cname) same as db['cname'] or db.cname
db.getCollectionInfos([filter]) - returns a list that contains the names and options of the db's collections
db.getCollectionNames()
db.getLastError() - just returns the err msg string
db.getLastErrorObj() - return full status object
db.getLogComponents()
db.getMongo() get the server connection object
db.getMongo().setSlaveOk() allow queries on a replication slave server
db.getName()
db.getPrevError()
db.getProfilingLevel() - deprecated
db.getProfilingStatus() - returns if profiling is on and slow threshold
db.getReplicationInfo()
db.getSiblingDB(name) get the db at the same server as this one
db.getWriteConcern() - returns the write concern used for any operations on this db, inherited from server object if set
db.hostInfo() get details about the server's host
db.isMaster() check replica primary status
db.killOp(opid) kills the current operation in the db
db.listCommands() lists all the db commands
db.loadServerScripts() loads all the scripts in db.system.js
db.logout()
db.printCollectionStats()
db.printReplicationInfo()
db.printShardingStatus()
db.printSlaveReplicationInfo()
db.dropUser(username)
db.repairDatabase()
db.resetError()
db.runCommand(cmdObj) run a database command. if cmdObj is a string, turns it into { cmdObj : 1 }
db.serverStatus()
db.setLogLevel(level,<component>)
db.setProfilingLevel(level,<slowms>) 0=off 1=slow 2=all
db.setWriteConcern( <write concern doc> ) - sets the write concern for writes to the db
db.unsetWriteConcern( <write concern doc> ) - unsets the write concern for writes to the db
db.setVerboseShell(flag) display extra information in shell output
db.shutdownServer()
db.stats()
db.version() current version of the server
