On Sat, 2014-06-07 at 12:33 +0100, Richard W.M. Jones wrote: > In any case, cache='none' (ie. O_DIRECT) won't work, and you shouldn't > use it for throwaway test machines anyway. Since tmpfs always > disappears at reboot, any machine you create on a tmpfs is a throwaway > one, whether you intended that or not! > > Use cache='unsafe' on tmpfs. > > (This advice applies to libguestfs, virt-builder, etc too) > > For more info on caching modes, see: > http://rwmj.wordpress.com/2013/09/02/new-in-libguestfs-allow-cache-mode-to-be-selected/
Does the type of storage being used for the KVM (e.g. LVM, a file, etc.) change which cache mode should be employed? I ask because this page says if raw volumes or partitions are used, the cache should be set to "none": http://www.linux-kvm.org/page/Tuning_KVM Does that still hold true? Regards, Ranbir -- Kanwar Ranbir Sandhu Linux 3.14.3-200.fc20.x86_64 x86_64 GNU/Linux 11:18:22 up 5 days, 22:42, 3 users, load average: 0.92, 0.83, 0.79 _______________________________________________ virt mailing list virt@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/virt
