Shulou(Shulou.com)05/31 Report--

In this issue, the editor will bring you about the basic management commands commonly used in mongodb. The article is rich in content and analyzes and describes for you from a professional point of view. I hope you can get something after reading this article.

1. Start the service

Use parameter

-- dbpath specifies the data file path

-- logpath specifies error log file

-- logappend error log append method

-- bind_ip listens for ip addresses

-- port listening port

-f start with a parameter file

Folk runs in the background as a daemon

-- the time in which the syndelay system synchronously refreshes the disk.

. / mongod-dbpath=/data-logpath=/data/mongo.log-folk-bind_ip=192.168.234.154-port 999

If you start with a parameter file, you can write your own parameter file

Vim mongo.conf

Dbpath=/data

Logpath=/data/mongo.log

For (var item1 witch I db.pincer.dataSize ()

five hundred and forty eight

6. Get the total size of the aggregate set

Db.userInfo.totalSize ()

7. Size of storage space for aggregate sets.

Db.userInfo.storageSize ()

8. Shard version information

Db.userInfo.getShardVersion ()

9. Rename the aggregate set

Db.userInfo.renameCollection ("users")

Rename userInfo to users

10. Delete the current aggregate collection

Db.userInfo.drop ()

3. Get all the aggregate sets of the current db

Db.getCollectionNames ()

4. Display the status of all clustered indexes in the current db

Db.printCollectionStats ()

1. Add a user

Db.addUser ("name")

Db.addUser ("userName", "pwd123", true)

Add users, set passwords, whether read-only

2. Database authentication and security mode

Db.auth ("userName", "123123")

3. Show all current users

Show users

4. Delete a user

Db.removeUser ("userName")

Verify login:

Mongo-host=ip-port=num-uuser-ppassword dbname

1. Query the previous error message

Db.getPrevError ()

2. Clear the error record

Db.resetError ()

3. Rename the aggregate set

Db.userInfo.renameCollection ("users")

List the actions being performed

Db.currentOp (dbname)

Kill the operation being carried out

Db.killOp (opid)

Create a collection

1, creating a collection is 100, 000 bytes

Db.createCollection ("mycollection", {capped:true,size:100000})

2, create a collection with a size of 100000 bytes and a maximum number of documents

Db.createCollection ("mycollection", {capped:true,size:100000max:100})

Force cache data to be flushed to disk

Db.runCommand ({"fsync": 1, "lock": 1})

Online backup and recovery

Mongodump-d database-o backupdir

Mongorestore-d database-- drop backupdir

Mongo master and slave

Master:

Mongod-bind_ip=192.168.0.1-port=999-dbpath=/test-logpath=/test/mongo.log-logappend-master

Slave:

Mongod-bind_ip=192.168.0.2-- port=998-- dbpath=/test-- logpath=/test/mongo.log-- logappend-- slave-- source 192.168.0.1

-- only copies only the specified database

-- slavedelay slave node delay (in seconds)

-- autoersync if the slave node is out of sync with the master node, it will automatically resynchronize

-- oplogSize primary node oplog size in M

These are the basic mongodb management commands that Xiaobian shares with you. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.