MongoDB saves space by using replication to restore the database

You can use Db.copydatabase to back up the method of copying data.

1.db.copydatabase ("from", "to", "127.0.0.1:16161"), copy a new to database. This is already the smallest data footprint. The data file of the to is generated in the database directory.

2. Change the configuration of all programs from the from library to the to library. The test is correct.

3. You can delete the from library at this point. Method. Use from after Db.dropdatabase (). The advantage of this method is that you can delete the data on the disk in time. Save a lot of space.

Students with disk tension can refer to the above methods.

MongoDB saves space by using replication to restore the database