On Tue, 4 Dec 2007, Christopher Chan wrote:
>
>> ext3 again takes the slowest performing title overall as expected...in
>> fact it appears not much as changed fs vs fs wise since Bruce Guenter's
>> tests. But I am surprised at the overall performance regressions in
>> comparison to 2.6.5/6 kernels with regards to deliveries vs amount of
>> writers. Heitor, you are using a 3ware 95xx or 96xx with BBU write cache
>> and write caching on right? How much RAM do you have for your cache? How
>> is your raid10 configured? I cannot believe a four disk raid0 array can
>> beat a software raid mirror of scsi disks as used by Bruce Guenter.
>
> that last sentence should have been 'cannot beat'
I can believe it. Linux SW RAID is _VERY_ fast. The advantage of 3ware HW
RAID is in its convienence and robustness when Bad Things (tm) happen, not
its performance, in my experience.
--
Benjamin Franz
"It is moronic to predict without first establishing an error rate
for a prediction and keeping track of one’s past record of accuracy."
-- Nassim Nicholas Taleb, Fooled By Randomness