Re: SAN/NAS options

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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


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