Re: [Xen-users] disk speed

Christian Horn
Mon, 22 Oct 2007 19:52:48 -0000

On Mon, Oct 22, 2007 at 10:45:32AM -0700, Dylan Martin
wrote:
> Has all the testing that shows this slowness been done with large
> files?
Yes

> I''d be interested to see if the same is true under more normal
> use.  E.G. copy 10 medium files 10 times each and 100 medium files 1
> time each.  Caching could make it faster on domU and seeking around
> could make it slower... Or who knows what other variables might kick
> in..
I wasnt interested in how well caching in the domU works, as its the
same algorithms as non-xen-linux. Just the raw i/o was measured, and
making sure the data was synced.
If you need profiles of how well the caching works you should bench-
mark with exactly your usecase anyway...


Christian