Re: Bandwidth Allocations under CFQ I/O Scheduler

From: Jakob Oestergaard
Date: Wed Oct 18 2006 - 08:45:12 EST


On Wed, Oct 18, 2006 at 01:42:24PM +0100, Alan Cox wrote:
> Ar Mer, 2006-10-18 am 14:23 +0200, ysgrifennodd Jakob Oestergaard:
> > iops/sec is what you get from your disks. In real world scenarios. It's
> > no more magic than the real world, and no harder to understand than real
> > world disks. Although I admit real-world disks can be a bitch at times ;)
>
> Even iops/sec is very vague and arbitary. If your disk happens to be
> retrying a sector or doing a cleaning pass or any other housekeeping or
> vibration damping and so on you'll get very different numbers.

True.

>
> Bandwidth is completely silly in this context, iops/sec is merely
> hopeless 8)

Thanks Alan - I feel much better now :)

--

/ jakob

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