EVMS does this: http://evms.sourceforge.net/

Jos

Miles O'Neal wrote:
> We're looking at going to multiple tiers
> of filespace.  Our tier1 is a couple of
> NetApp fileservers.  These automatically
> snapshot things.  But we can't afford
> NetApp for all our disk space, and are
> going to build some PC-based fileservers
> using SL.
> 
> Do any of you have experience using any sort
> of snapshot capability with any of the OSes
> available for SL?  Do any of the filesystems
> support this directly, or are you using LVM
> or something similar?  Ideally, I'd like
> something built into the FS, but I can't find
> evidence that any of the standard FSes have
> this capability...
> 
> Thanks,
> Miles