mongo备份恢复

1.mongoexport 与mongoimport 

export

mongoexport --host "localhost:27017" --username="user" --password="xxxx" --authenticationDatabase=testdb --db=testdb --collection=testc --out /back/testc.josn

import

mongoimport --host "localhost:27017" --username="user" --password="xxxx" --authenticationDatabase=testdb --db=testdb_v3 --collection=testc --file /back/testc.josn

2.mongodump与mongostore

mongodump -h "localhost:port" --username="user" --password="pwd" --authenticationDatabase=authdb -d dbname -o /root/back

restory
mongorestore -h "localhost:port" --username="user" --password="pwd" --authenticationDatabase=authdb -d dbname --dir /root/back/fission_balance/

3.hot backup   -- Percona Server for MongoDB支持，社区版本不支持

Percona Server for MongoDB includes an integrated open-source hot backup system for the default WiredTiger and
alternative MongoRocks storage engine. It creates a physical data backup on a running server without notable performance
and operating degradation.
To take a hot backup of the database in your current dbpath, run the createBackup command as administrator
on the admin database and specify the backup directory.

> use admin
switched to db admin
> db.runCommand({createBackup: 1, backupDir: "/my/backup/data/path"})
{ "ok" : 1 }

If the backup was successful, you should receive an { "ok" : 1 } object. If there was an error, you will receive
a failing ok status with the error message, for example:

> db.runCommand({createBackup: 1, backupDir: ""})
{ "ok" : 0, "errmsg" : "Destination path must be absolute" }

备份恢复相关参考博客

MongoDB在线热备神器-createBackup

从炉石传说数据库故障谈谈MongoDB的数据库备份和恢复手段

Mongodump的archive（归档）模式原理解析