On 2010-09-01 21:19, Nikolai K. Bochev wrote: > And if testing shows things are ok, would there be any merit in changing > either libvirt or virt-manager to do this by default just for ubuntu ( not > really sure what upstream will do about it ) ?
FWIW, I would welcome such a change myself. Adding the cache='none' directive to a VM's .xml file is the very first thing I do after its installation, for performance reasons. I have been running several VMs (all Lucid) for about four months now that way, without ever encountering any issues¹. The host is also Lucid, with unattended-upgrades set to automatically reboot the machine when necessary, so the VMs sometimes just get killed. Regards, Oliver 1) well, besides that disk I/O from the guests is still too slow for my taste. I get near native speed (about 80 MB/s) using direct i/o during tests with dd, but regular i/o during normal operation is only about 35 MB/s. If anyone knows how to force direct i/o on all processes (or something with similar results), please let me know. -- ubuntu-server mailing list ubuntu-server@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-server More info: https://wiki.ubuntu.com/ServerTeam
