On Mon, 25 Jun 2007, Justin Piszcz wrote:
On Mon, 25 Jun 2007, Bill Davidsen wrote:
Justin Piszcz wrote:
I have found a 16MB stripe_cache_size results in optimal performance after
testing many many values :)
We have discussed this before, my experience has been that after 8 x stripe
size the performance gains hit diminishing returns, particularly for
typical write instead of big aligned blocks, possibly with O_DIRECT. I
would suggest that as a target even on a low memory machine.
Do your tests show similar? I was only able to test three and four drive
setups using dedicated drives.
--
bill davidsen <[EMAIL PROTECTED]>
CTO TMR Associates, Inc
Doing interesting things with small computers since 1979
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Running test with 10 RAPTOR 150 hard drives, expect it to take awhile until I
get the results, avg them etc. :)
128k,256k,512k,1024k,2048k,4096k,8192k,16384k
Justin.
Definitely a kernel bug, I set it to 64kb and it stayed in D-state until I
ran alt-sysrq-b.
Pretty nasty!
Justin.
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