MongoDB Learning Journey 14: MongoDB Data backup and recovery

Backup

[Root@localhost bin]#./mongodump-d my_mongodb 
connected to:127.0.0.1  
database:my_mongodb     to     dump/ My_mongodb          
my_mongodb.system.indexes to Dump/my_mongodb/system.indexes.bson                  
1 objects          
My_mongodb.user To Dump/my_mongodb/user.bson                  
2 objects 
[root@localhost bin]# ll 
Total 67648  
-rwxr-xr-x 1 root root 7508756 2011-04-06 bsondump 
drwxr-xr-x 3 root root    4096 04-10 23:54 Dump 

At this point, a dump directory is created in the current directory to hold the backed up files and, of course, to specify the directory where the backup resides.

Root@localhost bin]#./mongodump-d my_mongodb-o my_mongodb_dump connected to:127.0.0.1  
database:my_mongodb< C2/>to     my_mongodb_dump/my_mongodb        
 my_mongodb.system.indexes  to  my_mongodb_dump/my_mongodb/ System.indexes.bson                  
1 Objects          
my_mongodb.user to My_mongodb_dump/my_mongodb/user.bson           
2 objects 

In this example, the backup file exists in the My_mongodb_dump directory under the current directory

Recovery

Since the backup has just been done, let's first talk about the library My_mongodb deleted

> Use My_mongodb  
switched to db My_mongodb 
> Db.dropdatabase () 
{"Dropped": "My_mongodb", "OK": 1} 
> Show dbs  
admin   (empty) 
local   (empty) 
test    (empty) 
>   

Next, we perform data recovery

[Root@localhost bin]#./mongorestore-d my_mongodb my_mongodb_dump/connected to:127.0.0.1  
Wed Apr one 00:03:03 m Y_mongodb_dump/my_mongodb/user.bson 
Wed Apr 00:03:03      going into namespace [My_mongodb.user] 
Wed Apr 11 00:03:03      2 objects found  
Wed Apr one 00:03:03 my_mongodb_dump/my_mongodb/system.indexes.bson 
Wed Apr 11 00:03:03      going into namespace [my_mongodb.system.indexes] 
Wed Apr one 00:03:03 {name: "_id_", NS: "My_mongodb.use R ", key: {_id:1}, v:0} 
Wed Apr 00:03:03      1 objects found 
[root@localhost bin]#

After the validation of the database back, in fact, to restore the database, it is not necessary to delete the My_mongodb library, as long as the description of the-drop parameter, you can restore the table and then insert data into the table.