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Re: [linux-lvm] Long-term snapshots possible?



On Tue, Mar 11, 2003 at 09:46:16PM +0100, jon+lvm silicide dk wrote:
> > My problem is, this does not currently look possible without a severe 
> > performance hit.  If a volume has, for example, five active snapshots, 
> > then the deltas seem to get written five times, once per snapshot volume.
> 
> How would you not do that ? You have to store the snapshots some how.

It would be similar to netapp's snapshots.  the active data blocks are
shared with the snapshots until a change occurs in active, then active
gets a new block and all the snapshots keep sharing the old block. :)
Very fast, and low space usage.

"Mmmm, WAFL ...  <gargle gargle>" -- Homer Simpson, IT Manager   ;)

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