Malinka Rellikwodahs wrote:
Host: 2.6.27-gentoo-r8 AMD Opteron 2378
Guest: Windows XP SP2
when running with a raw disk image as a file or a raw disk image on an
lvm vg, I'm getting very low performance on write (5-10 MB/s) however
when using qcow2 format disk image the write speed is much better
(~30MB/s), which is consistant with a very similar setup running
kvm-68. Unfortunately when running the test with qcow2 the system
becomes unresponsive for a brief time during the test.
kvm -localtime -m 1024 -drive file=<diskimage>,boot=on
where diskimage is either the qcow2 format image, or the path to the lv
What version of kvm is this? Is it kvm-68? You'll have better luck
with something newer than that.
Regards,
Anthony Liguori
The host is running raid5 and drbd (drive replication software),
however performance on the host is performaning well and avoiding the
drbd layer in the guest does not improve performance, but running on
qcow2 does.
Any thoughts/suggestions of what could be wrong or what to do to fix this?
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