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Re: [Xen-users] Re: [Linux-HA] very odd iowait problem

To: Cristian Vásquez Parga <cvasquez@xxxxxxxxxxxxx>
Subject: Re: [Xen-users] Re: [Linux-HA] very odd iowait problem
From: Miles Fidelman <mfidelman@xxxxxxxxxxxxxxxx>
Date: Sat, 19 Jun 2010 13:42:27 -0400
Cc: Ciro Iriarte <cyruspy@xxxxxxxxx>, "xen-users@xxxxxxxxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxxxxxxxx>
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Cristian Vásquez Parga wrote:

try install iotop in the domU, or "sar 2 0" and paste that result, and i think that the any software raid is very bad idea. try check the disk's IOPS too.
already running iotop and sar - not helping a lot - looking more and more like a low-level software or hardware issue

I'd be interested in more about why "software raid" is a bad idea. I've had pretty good luck with md-based RAID1.



In theory, there is no difference between theory and practice.
In<fnord>  practice, there is.   .... Yogi Berra

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