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Re: [Xen-users] Disk IO trouble in Xen
| To: | xen-users@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | Re: [Xen-users] Disk IO trouble in Xen |
| From: | Kai Schaetzl <maillists@xxxxxxxxxxxxx> |
| Date: | Fri, 02 May 2008 11:31:11 +0200 |
| Delivery-date: | Fri, 02 May 2008 02:32:04 -0700 |
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| In-reply-to: | <C43FA138.11525%greg.hellings@xxxxxxxxxxxx> |
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Greg Hellings wrote on Thu, 01 May 2008 16:32:56 -0700: > Is it normal for the performance difference to be so great? No, not at all. I actually did similar tests recently and found that the performance is almost identical (usually something like 10% less on the first test). I also found that there must be occurring some caching when you use images as the speed of the disk reads increases dramatically (it skyrockets) with a few repeated hdparm tests. I tested with CentOS 5 on ext3 filesystems, not with Reiser. Kai -- Kai Schätzl, Berlin, Germany _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users |
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