Shulou(Shulou.com)06/01 Report--

C:\ Users\ duansf > mongo

MongoDB shell version: 2.6.6

Connecting to: test

> use test

Switched to db test

> show collections

Articles

Books

Chenfeng

Dsf

Fs.chunks

Fs.files

System.indexes

System.profile

Test

Users

> db.books.drop ()

True

>

Delete the collection of books, but check the data file and find that the size remains the same, and MongoDB will not automatically free the file space.

After db.repairDatabase () / / executes this command, Mongodb frees up unwanted space

> db.repairDatabase ()

{"ok": 1}

>

Note: locks will occur during repairDatabase. It is recommended to close the application before performing this operation.

The official documentation interprets this command as follows:

RepairDatabase requires free disk space equal to the size of your current data set plus 2 gigabytes. If the volume that holds dbpath lacks sufficient space

You can mount a separate volume and use that for the repair. When mounting a separate volume for repairDatabase you must run repairDatabase from the command

Line and use the-- repairpath switch to specify the folder in which to store temporary repair files.

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