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Go Back   Linux Archive > Redhat > Device-mapper Development

 
 
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Old 09-01-2008, 01:24 PM
"Eric Van Hensbergen"
 
Default dm snapshot: log only

Is there any way to get dm snapshot to generate only an exception log
of blocks written? I've been playing around with Venti under Linux
and it would greatly accelerate snapshots to venti if I only have to
process blocks written since the last snapshot instead of scanning the
whole partition. I've toyed with the idea of keeping origin snapshots
around in between venti snapshots and just processing their exception
log -- but the copy-on-write performance overheads of origin snapshot
may be undesirable.

Thanks for any help,

-eric

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