Messages in this thread | | | Date | Tue, 7 Jan 2003 11:53:57 -0700 | From | Andreas Dilger <> | Subject | Re: Virtual WORM device |
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On Jan 07, 2003 18:41 +0000, John Bradford wrote: > > Somebody should then modify `rm` and the kernel unlink > > to `mv' files to the dumpster directory on the > > file-system, instead of really deleting them. > > Another possibility would be to create a meta-device that works like a > cross between the loopback device, and WORM device, I.E. start at the > begining, and allocate sectors sequentially. Whenever a sector would > normally be overwritten, a new one is allocated instead. This way, > you could always access the filesystem as it was at any mount in time.
This is commonly called a filesystem snapshot, and you can already do it with LVM.
Cheers, Andreas -- Andreas Dilger http://sourceforge.net/projects/ext2resize/ http://www-mddsp.enel.ucalgary.ca/People/adilger/
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