[MongoDB] set up a Mongo Master/slave database for synchronization in windows, mongodbmongo
In the previous series of articles, we talked about the basic operations, advanced queries, and index usage of mongodb. This blog mainly describes how to create master-slave Database Synchronization in windows;
You need to start two mongoDb document databases. One is the master mode and the other is the slave mode.
1. Create a master-slave server
Master server: 192.168.1.131: 27017
Backup Server: 192.168.1.131: 27015
Create master server
Create a backup server:
2. Start the active/standby service
3. Test Data Synchronization
Create a database on the host and insert data:
Relationship between the client and the master and slave
How to Create a mongodb database with a user name and password
I'm so angry. Let's just put it down. Below is a part of my notes on mongodb.
By default, mongoDB user authentication is disabled.
Modify the/etc/cmdd. conf file. By default, any client in mongoDB can connect to port 27017 without authentication. By default, there is no administrator account. By modifying this configuration file, you can change it to permission authentication during login.
If you want to create a user for a database in mongoDB, you must first enter the database and then use the addUser command. You can also set the user to read-only (db. addUser ("jack", "jack", true), and the third parameter to indicate whether the user is a "read-only user ").
To use a super administrator, you must first connect to the admin database and log on to the administrator account, and then connect to other databases to exercise administrator privileges.
User information storage and authentication process
Similarly, MySQL saves system user information in the mysql. user table. MongoDB also saves the username and pwd of the system user in the admin. system. users collection. Pwd = md5 (username + ": mongo:" + real_password ). This is not a problem. Username And: mongo: It is equivalent to adding a salt value to the original password. Even if attackers obtain the md5 hash stored in the database, they cannot simply find the original password from the rainbow table.
Common permission management commands
1. # enter the database admin
Use admin
2. # Add or modify user passwords
Db. addUser ('name', 'pwd ')
3. # view the user list
Db. system. users. find ()
4. # User Authentication
Db. auth ('name', 'pwd ')
If this one returns 1, the authentication is successful. Only after the authentication is successful can the database be operated.
5. # delete a user
Db. removeUser ('name ')
6. # view all users
Show users
7. # view all databases
Show dbs
8. # view all collections
Show collections
9. # view the status of each collection
Db. printCollectionStats ()
10. # view master-slave replication status
Db. printReplicationInfo ()
A client tool used to connect to the mongodb database.
Jmongobroue, MonvoVUE, and windows command lines can also be used.
However, it is best to use the next enhanced cmd Tool, such as powercmd, because it cannot be displayed in the command line, and it is not necessarily displayed in the client tool. If you want to learn mongo, you 'd better learn to knock on commands instead of "click it"