[fedora-virt] Cache=default gives appallingly awful disk performance

[Tom Horsley]

On Mon, 14 Nov 2011 19:41:38 +0200
Avi Kivity wrote:

> Most likely the 'sdelete' utility insists on
> overwriting the file multiple times

Nope, I was only using it in the one pass
write lots of zeros mode (-c option).

In any case, even if it is a bad test, it
doesn't change the conclusion that the
disk performance with cache=default
is appallingly awful :-). Hours versus
minutes is insane.