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Re: [Xen-users] development machine with xen on gentoo

To: Nick Anderson <nick@xxxxxxxxxxxx>
Subject: Re: [Xen-users] development machine with xen on gentoo
From: Stephan Wentz <stephan@xxxxxxxx>
Date: Fri, 06 Jun 2008 02:19:55 +0200
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Nick Anderson wrote:
Stephan Wentz wrote:
I think that the RAID controller has to do with it (3ware 9550SX), but I have no clue on how to get more details to find the bottleneck.
I think you are correct. I have had some performance issues with 3ware controllers in the past.

What file system, have you done any of the 3ware tweaks? Your best bet is to start tracking down performance issues on the controller first off.

Do you have a BBU? if not you should get one in my tests a BBU on 3ware will increate write performance by up to 10%. What is storesave set to on the raid controller?

Oops, forgot to mention - will check the storesave parameter tomorrow. What setting is recommended?

And, additionally, would you recommend setting cache on or off? On only with a BBU?

Stephan

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