Am 25.04.2010 23:05, Jon M. Skelton wrote: > I'm currently doing this. Ubuntu 10.04 (beta) using glusterfs to mirror > qcow2 KVM machine images. Works quite well. In both your crashing cases, > things look much like when VM gets 'virsh destroy'. It's a little rough > on the filesystem contained within the machine image. I've had some luck > cleaning them up accessing the machine image filesystems via qemu-nbd: Did you compare how much performance drops, versus bare metal? I.e. run it in virtual guest, virtual host and the glusterfs server itself (if virtual host is a different server than at least one of glusterfs servers)? time dd if=/dev/zero of=/bigfile bs=1M count=5000 time dd if=/bigfile of=/dev/null bs=64k And drop caches between each run with: echo 3 > /proc/sys/vm/drop_caches -- Tomasz Chmielewski http://wpkg.org
