zfs snapshots.

[Brooks Davis]

On Fri, Dec 03, 2010 at 08:51:02PM +0100, Peter Ankerst?l wrote:
> 
> 
> > On 2010-12-03 20:40, Peter Ankerst?l wrote:
> >> Is there a way to take a snapshot without using space from the parent filesystem?
> >> 
> > AFAIK snapshot doesn't take any space as long as filesystem hasn't
> > changed from the time when snapshot was taken.  For instance -
> > If you take snapshot on filesystem and after that, 10MB file is
> > deleted, snapshot is using only 10MB space from (because it's only
> > difference between snapshot and actual filesystem).
>
> Yes, this is correct. But it still uses up 10MB from the parent
> filesystem. This is a problem if you use both snapshots and quotas.
> (and use alot of snapshots)

You many be able to use the refquota attribute instead of quota unless
you're trying to place quotas on filesystem hiearchies.

-- Brooks
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