On Tue, May 27, 2014 at 11:21 AM, J. Roeleveld <jo...@antarean.org> wrote:
> Does anyone know how these will handle (and perform) with a possible 300+
> snapshots per filesystem (or volume, as I think it's called)?

I can't speak for zfs.  I had upwards of 1000 snapshots on my system
before I stopped creating them hourly and and just started having
issues with it.

I wouldn't really say it is ready for prime time, but it is workable.
Of course, you'll still want backups - a million snapshots does you no
good if some bug wipes out your filesystem.  For one of my ENOSPC
incidents I ended up just wiping the entire filesystem and restoring
from backup, though if I kept at it I'd probably have been able to fix
it.

Oh, one other tip if you use btrfs - be sure you have a rescue disk
that supports it.  Hint, the old Gentoo install CD I had lying around
didn't.  You'll probably want to keep a rescue CD with a recent kernel
and btrfs-tools handy at all times.

Rich

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