Re: Virtual WORM device
Andreas Dilger (adilger@clusterfs.com)
Tue, 7 Jan 2003 11:53:57 -0700
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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