Re: SAN/NAS options

On Fri, Dec 16, 2005 at 04:18:01PM -0600, Jim C. Nasby wrote:
>Even if you're doing a lot of random IO? I would think that random IO
>would perform better if you use smaller (8K) blocks, since there's less
>data being read in and then just thrown away that way.

The overhead of reading an 8k block instead of a 32k block is too small
to measure on modern hardware. The seek is what dominates; leaving the
read head on a little longer and then transmitting a little more over a
200 megabyte channel is statistical fuzz.

Mike Stone