kvm-83 On Mon, Mar 2, 2009 at 15:35, Anthony Liguori <anthony@xxxxxxxxxxxxx> wrote: > 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? >> -- >> To unsubscribe from this list: send the line "unsubscribe kvm" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
