On 24/06/2010 17:49, Erik Trimble wrote:
But it's early (for me), and I can't remember the answer here.
I'm sizing an Oracle database appliance. I'd like to get one of the F20
96GB flash accellerators to play with, but I can't imagine I'd be using
the whole thing for ZIL. The DB is likely to be a couple TB in size.
Couple of questions:
(a) since everything is going to be zvols, and I'm going to be doing
lots of sync writes to them, I'm thinking that allocating around a dozen
GB of the F20's flash would be useful. :-)
(b) can zvols still make use of an L2ARC device for their pool? I'm
assuming so, since it's both block and metadata that get stored there.
I'm considering adding a couple of very large SSDs to I might be able to
cache most of my DB in the L2ARC, if that works.
Yes, the level that the L2ARC works at doesn't care if the dataset is
filesystem or ZVOL.
--
Darren J Moffat
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