Subject: Re: Limiting disk I/O?
To: None <tech-kern@NetBSD.org>
From: Jukka Marin <firstname.lastname@example.org>
Date: 11/13/2007 17:25:11
On Tue, Nov 13, 2007 at 04:05:40PM +0100, Joerg Sonnenberger wrote:
> > The disk is part of the problem, at least with twa. It seems the performance
> > collapses when the controller becomes real busy. Even tw_cli (the 3ware cli
> > tool) starts to crawl when softdep is pushing data to disk.
> In that case the driver can do that completely internal.
The same happens with regular disks, too (I have seen it many times before).
I talked to my hw dealer today and he said some kind of I/O throttling has
been implemented in linux to help with the same problem.