On Mon, Feb 16, 2009 at 4:55 PM, Mark Johnson <[email protected]> wrote:
>
>
> Piotr Jasiukajtis wrote:
>>
>> Hi,
>>
>> How can I improve performance of Windows XP / Windows Server 2003
>> using .vmdk files?
>>
>> The guests are extremely slow on .vmdk files instead of raw zvols.
>
> They shouldn't be...
>
>
> Are you using PV drivers? What's the disk entry on the
> guest?
No PV drivers.
> xm list -l <guest>
>
> e.g. here's one of mine..
>
> (device
> (tap
> (uuid b6493411-5a81-798c-8683-d3e60e817e5a)
> (bootable 0)
> (dev hda:disk)
> (uname tap:vdisk:/tank/guests/windows7/disk0)
> (mode w)
> (backend 0)
> )
(device
(tap
(uname tap:vdisk:/export/xvm/isos/test.vmdk)
(uuid 64df266d-6b58-0d26-ab4c-29a2b7d21c2f)
(mode w)
(dev hda:disk)
(backend 0)
(bootable 1)
)
)
> How disk you create the vmdk file? With vdiskadm?
No, it's created from physical machine via vmware converter.
> Is the disk on a local filesystem? If so UFS or ZFS?
Local disk ZFS root. SXCE107.
> If ZFS, did you set the record size to 8k (zvols default
> to 8K.
>
>
> i.e.
>
>
> # zfs get recordsize tank/guests
>
> : alpha[1]#; zfs set recordsize=8k tank/guests
> : alpha[1]#; zfs get recordsize tank/guests
> NAME PROPERTY VALUE SOURCE
> tank/guests recordsize 8K local
> : alpha[1]#;
My vmdk file:
# ls -alh /export/xvm/isos/test.vmdk
-rw------- 1 xvm root 1,9G lut 17 11:44 /export/xvm/isos/test.vmdk
# zfs get recordsize rpool/export/xvm/isos
NAME PROPERTY VALUE SOURCE
rpool/export/xvm/isos recordsize 128K default
# zfs get recordsize rpool/export/xvm
NAME PROPERTY VALUE SOURCE
rpool/export/xvm recordsize 128K default
My ZVOL:
# zfs get recordsize rpool/export/xvm/winsrv2_c
NAME PROPERTY VALUE SOURCE
rpool/export/xvm/winsrv2_c recordsize - -
--
Regards,
Piotr Jasiukajtis | estibi | SCA OS0072
http://estseg.blogspot.com
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