Hello,
I'm using Nexenta and am impressed by allof the OpenSolaris, ZFS and
Nexenta parts, thank you for feeing us of the RAID hole.
Having created zvols in a pool (6 mirror sets, 2 SSDs for L2ARC), with
compression turned on, I am now realising that the data stored in the
L2ARC SSD is the 'raw', not the 'compressed' form (just finished reading
http://blogs.sun.com/dap/entry/zfs_compression).
Does anyone know if it would be technically feasible (one day) to cache
the compressed data there ?
For data (like databases) that compresses quite well (e.g. 3.5x), if the
compressed form is stored, a 100GB L2ARC cache essentially would hold
350GB, which would be a big win.
If this is potentially in the pipeline great... Otherwise, I'll go back
to the SSD shop...
Many thanks again
Frederic
--
Frederic Vander Elst
Group Head of IT
The pH Group
Direct Line: 020 7598 0320
Office Line: 020 7598 0310
Mobile: 07817 179 593
Fax: 020 7598 0311
www.phgroup.com
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