On Dec 20, 2006, at 04:41, Darren J Moffat wrote:
Bill Sommerfeld wrote:
There also may be a reason to do this when confidentiality isn't
required: as a sparse provisioning hack..
If you were to build a zfs pool out of compressed zvols backed by
another pool, then it would be very convenient if you could run in a
mode where freed blocks were overwritten by zeros when they were
freed,
because this would permit the underlying compressed zvol to free
*its*
blocks.
A very interesting observation. Particularly given that I have
just created such a configuration - with iSCSI in the "middle".
over ipsec? wow - how many layers is that before you start talking
to the real (non-psuedo) block storage device?
---
.je
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