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Here you go...
name="2k3Guest"
memory=2048
vcpus=2
localtime=1
builder="hvm"
extid=0
device_model="/usr/lib/xen/bin/qemu-dm"
kernel="/usr/lib/xen/boot/hvmloader"
boot="c"
disk=[ 'file:/var/lib/xen/2k3Guest/disk0,hda,w', 'file:/var/lib/xen/iso/2k3.iso,hdc:cdrom,r', ]
vif=[ 'mac=00:16:3e:55:ff:13,bridge=xenbr1','mac=00:16:3e:76:32:af,bridge=xenbr2' ]
stdvga=0
vnc=1
vncunused=1
apic=1
acpi=1
pae=1
usb=1
usbdevice='tablet'
serial="pty"
-Nick
>>> Mike Williams <mike@xxxxxxxxxxx> 2009/01/07 07:04 >>>
On Tuesday 06 January 2009 22:58:18 James Harper wrote:
> E200+file:+GPLPV = 320MB/min but the Dom0 would freeze after about 8GB
> restored and the restore would fail
>
> E200+tap:aio+GPLPV = 12MB/min. This would probably run to completion but
> I wasn't going to wait
>
> E200+file:+qemu = 270MB/min and restored to completion
>
> SW RAID+tap:aio+GPLPV = 620MB/min (and everything remains responsive the
> entire time)
Very interesting numbers there James.
I'm a RAID10 man myself, but there is some chunk alignment issue with Xen, HVM
guests (possible just windows, I didn't try), and LVM, or something.
> Obviously something was wrong somewhere for the E200 to perform that
> badly, but don't underestimate the performance of software raid,
> especially RAID1 (I wouldn't recommend RAID[56] to anyone who cares
> about performance, be it hardware or software RAID).
Heh, I've just built this new machine with RAID6 :)
Your 620MB/min test, was that tap:aio on a file, or lvm, or ...? Might go back
to RAID10 and skip the LVs instead, I won't ever resize these images.
Nick, James, would you mind sharing your xen configs for 2 vpcu win2k3 domUs
please?
Thanks
--
Mike Williams
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