四、mongodb shell使用loadjs与mongodb高速交互分析

╰半橙微兮° 2022-05-14 09:15 394阅读 0赞

\#        mongodb shell使用loadjs与mongodb高速交互分析

\#\#\#1、mongodb shell使用（相当于客户端，编程用的是js）

![这里写图片描述][70]

启动：

./mongo

加载js文件
    load（"js文件绝对路径"）；

db.help();
    查询db下面有哪些方法及函数。

> 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
    > db.getName()
    test

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[70]: /images/20220514/6299021dd7094571bd5323c56374f407.png
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