MongoDB usage notes

MongoDB usage notes

1. Installation Package http://www.mongodb.org/downloads

Ii. server use

LINUX version:

① Use tar-zxvfmongodb-linux-x86_64-1.2.4.tgz to decompress the installation package

② Mkdir-p/data/db create directory

③ Cd/data/db go to the db directory and create mkdir m_data m_log

④ Go to the bin directory of the mongodb decompression directory and use

./Mongod-fork -- dbpath =./data/db/m_data/-- logpath =./m_log.log -- logappend -- port = 27017 & start the server.

Windows version:

Run the following command to start the server:

Mongod -- bind_ip 127.0.0.1 -- logpath d: \ data \ logs -- logappend -- dbpath d: \ data \ db -- directoryperdb-install
 

[Note: Install mongodb as a service, bind the service to IP127.0.0.1, set the log file to d: \ data \ logs, and add method records. The data directory is d: \ data \ db. And each database will be stored in a separate directory (-- directoryperdb )]

Iii. Client usage:

LINUX version:

Go to the bin directory of MongoDB and use./mongo to the command line to perform routine operations such as adding, deleting, modifying, and querying.

Windows version:

Enter the bindirectory of mongodband use the cmd.exe -- host IP -- port to connect to the MongoDB server.

4. Stop MongDB

LINUX version:

If you can directly press CTRL + C in the shell window, if it is used as a background service, you can first use ps-ef | grep pid d to query the server's pid, then use kill-9 pid. The Pid here is the queried pid.

Windows version:

If you press CTRL + C in the Command window and use it as a system service, you need to stop the service in service management or terminate the process in window manager.

5. web Version Statistics Service Status

Use http: // IP (Server IP): Port

Vi. Syntax

1. Basic operations

Db. AddUser (username, password) Add User

Db. auth (usrename, password) sets database connection Verification

Db. cloneDataBase (fromhost) clone a database from the target server

Db. commandHelp (name) returns the help for the command

Db. copyDatabase (fromdb, todb, fromhost) copy the database fromdb --- source database name, todb --- target database name, fromhost --- source database server address

Db. createCollection (name, {size: 3333, capped: 333, max: 88888}) to create a dataset, equivalent to a table

Db. currentOp () cancels the current operation of the current database

Db. dropDataBase () Delete the current database

Db. eval (func, args) run code server-side

Db. getCollection (cname) gets a data set. In the same usage: db ['cname'] or

Db. getCollenctionNames () Get the name list of all data sets

Db. getLastError () returns the message indicating the last error.

Db. getLastErrorObj () returns the last error object

Db. getMongo () gets the connection object of the current server get the server

Db. getMondo (). setSlaveOk () allow this connection to read from then nonmaster membr of a replica pair

Db. getName () returns the name of the database to be operated on.

Db. getPrevError () returns the previous error object

Db. getProfilingLevel ()

Db. getReplicationInfo () to obtain duplicate data

Db. getSisterDB (name) get the db at the same server as this onew

Db. killOp () Stop (kill) the current operation in the current database

Db. printCollectionStats () returns the dataset status of the current database

Db. printReplicationInfo ()

Db. printSlaveReplicationInfo ()

Db. printShardingStatus () returns whether the current database is a shared database

Db. removeUser (username) delete a user

Db. repairDatabase () repairs the current database

Db. resetError ()

Db. runCommand (cmdObj) run a database command. if cmdObj is a string, turns it into {cmdObj: 1}

Db. setProfilingLevel (level) 0 = off, 1 = slow, 2 = all

Db. shutdownServer () Close the current service program

Db. version () returns the version information of the current program.

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