Re: [PATCH] speed up SATA

From: Jens Axboe
Date: Sun Mar 28 2004 - 12:34:26 EST

On Sun, Mar 28 2004, Jeff Garzik wrote:
> Jens Axboe wrote:
> >On Sat, Mar 27 2004, Jeff Garzik wrote:
> >
> >>"IOPs" are what make a lot of storage peeps excited these days, so they
> >>are being pushed in a low-latency direction anyway.
> >
> >
> >IOPS says nothing about latency, it's still 100% throughput oriented.
> In order to achieve a large IOPs number, one must sent a ton of small
> requests. Per-request latency as well as overall throughput is a factor.

I don't see how per-request latency is a factor at all, if your metric
is simply iops/sec. You could infinitely starve lots of requests
without hurting your io rate, nor throughput.

Jens Axboe

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