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Persistant Cows

On Fri, Apr 06, 2007 at 01:16:23AM +0200, Marco Amadori wrote:
> > > Use casper-sn, so a snapshot, it will write only once per session, at
> > > reboot, resyncing the whole /cow onto it.
> >
> > Doesn't that one work by copying the files from the snapshot to /cow?
> > I'm working with some systems that aren't too generously equipped with
> > RAM, so I don't want to put more stuff on the ramdisk than necessary.
> Mmmm, time for another type of snapshots?
> Would you like a add on unionfs on boot (r-o) , then resync from cow at 
> shutdown?

I ended up doing something like that - just without the synching at
shutdown. I put all the configuration files & such that I wanted to
keep in an ext2 filesystem in a file and copied that to
/live_media/casper. That way, it automatically gets inserted into the
root union, and I can always mount it and ad more stuff if I feel the
need. I found that that whole autosynching didn't work so well for me
because it also preserved things that I didn't want to preserve, like
information about my network setup - which made it somewhat hard to
move the boot media between different computers.

To make a long story short: I think modules in /casper are the right
solution for me right now; it would be cool if anyone came up with a
good approach for syncing the files in those modules conveniently, but
for the time being, I thing I have what I need :)

Thanks, all!

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