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 [off-list ref]
  CTO TMR Associates, Inc
  Doing interesting things with small computers since 1979