Re: [PATCH] 3/5: Device-mapper: snapshots

[Alasdair G Kergon]

On Wed, Jun 02, 2004 at 08:06:06PM +0200, Andi Kleen wrote:
> Alasdair G Kergon <agk@xxxxxxxxxx> writes:
> > +/*-----------------------------------------------------------------
> > + * Persistent snapshots, by persistent we mean that the snapshot
> > + * will survive a reboot.
> > + *---------------------------------------------------------------*/
 
As opposed to the transient snapshot which is lost on power down.

> Is this target supposed to be crash safe? What happens when
> the computer crashes while writing to such a volume?
 
The intention is for snapshot & origin still to be consistent with each other
on disk.  (No barriers yet, but some synchronous writes.)

Alasdair
-- 
agk@xxxxxxxxxx
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