[CentOS-virt] Bad Disk Performance of domU
Christopher G. Stach II
cgs at ldsys.net
Wed May 20 04:39:50 UTC 2009
----- "Francisco Pérez" <fperez.x at gmail.com> wrote:
> OK, here it is:
>
> name = "vm01"
> uuid = "2fa05fe5-9b52-3527-5bf5-efb88555c567"
> maxmem = 5836
> memory = 5836
> vcpus = 1
> bootloader = "/usr/bin/pygrub"
> on_poweroff = "destroy"
> on_reboot = "restart"
> on_crash = "restart"
> vfb = [ ]
> disk = [ "tap:aio:/var/lib/xen/images/vm01.img,xvda,w" ]
> vif = [ "mac=00:16:3e:15:6f:cd,bridge=xenbr0" ]
>
> Thanks.
What kind of "disk performance"? Read? Write? Random? Linear?
As for general tuning, use block devices (LVM) unless you have to do otherwise. Do you do a large amount of I/O in general? Do you have dom0's CPU pinned to an unshared core?
--
Christopher G. Stach II
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