Incremental backups of mediawiki folder

[tranquilventures]

We are running complete backups of the /mediawiki folder every hour. We need to modify the script to take only incremental backups of the folder every hour to S3.

[vijayabharathib]

Hi Gokul, couple of things to keep in mind while preparing incremental backup.

1. The wiki database and images are tightly coupled in case of integrity. We need to maintain that.
2. Restore should be auyomatuc and easy
3. Restore should not even miss a byte
4. Any change to existing images should also be captured properly.
5. We need to be able to take full backup occasionally (i.e if you take full backup today, it cannkt be just incremental back up for several days , it might increase the number of incremental files. )

@madhusam @arulrajnet @ithiru pls add your thoughts around requirements