From: Mike Fedyk <mfedyk@matchmail.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: New RAID-6 snapshot
Date: Tue, 30 Dec 2003 10:58:35 -0800 [thread overview]
Message-ID: <20031230185835.GV1882@matchmail.com> (raw)
In-Reply-To: <3FF1C91E.4090600@zytor.com>
On Tue, Dec 30, 2003 at 10:51:10AM -0800, H. Peter Anvin wrote:
> Now, you'd never use RMW only; it's only used when it should be faster
> than RCW, which is why I'm a bit surprised about the performance
> degradation. With only six drives in my test system it's pretty clear
> that RMW should very rarely be invoked, however, the performance ought
> to have stayed the same rather than slip.
You mentioned that none of your snapshots have RMW in them. Can you put up
a patch that adds RMW to the snapshots? Maybe someone will notice
something...
Did you get any data corruption with the RMW patch applied?
next prev parent reply other threads:[~2003-12-30 18:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-30 11:34 New RAID-6 snapshot H. Peter Anvin
2003-12-30 17:24 ` Mike Fedyk
2003-12-30 18:35 ` H. Peter Anvin
2003-12-30 18:43 ` Mike Fedyk
2003-12-30 18:51 ` H. Peter Anvin
2003-12-30 18:58 ` Mike Fedyk [this message]
2003-12-30 19:22 ` H. Peter Anvin
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