David Magda wrote:
On Wed, June 16, 2010 15:15, Arne Jansen wrote:
I double checked before posting: I can nearly saturate a 15k disk if I
make full use of the 32 queue slots giving 137 MB/s or 34k IOPS/s. Times
3 nearly matches the above mentioned 114k IOPS :)
34K*3 = 102K. 12K isn't anything to sneeze at :)
So you'll need six disks to do what one SSD does: three spindles, and two
(mirrored) disks on each spindle for redundancy (drives are riskier than
SSDs).
ok, 4 spindles, we already have a raid controller available :) But personally
I trust drives more than SSDs.
Are the 114k with mirrored or striped logzillas? In any case there are two of
them, so I'd double that raid-controller setup also, being still cheaper than
the STEC devices.
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