Marek Mahut

While looking for more information about ext4 filesystem, I found an interesting patch named ext3cow. It is a versioning file system based on ext3. And how it works?

[root@storm ~]# echo "Beee" > ~/kac
[root@storm ~]# snapshot
Snapshot on .: 1062987103
[root@storm ~]# echo "Meeeee" > ~/kac
[root@storm ~]# cat ~/kac@10629871034
Beee
[root@storm ~]# ~/kac
Meeeee
[root@storm ~]#

Unfortunately, due to performance and storage overhead, consider it only as toy and not as production solution.