openstack team mailing list archive

[Muriel <mucawhite@xxxxxxxxx>]

Il 10/05/2012 07:08, Jim Fehlig ha scritto:
> Hi,
>
> I've been tinkering with improving Xen support in the libvirt driver and
> wanted to discuss a few issues before submitting patches.
>
> Even the latest upstream release of Xen (4.1.x) contains a rather old
> qemu, version 0.10.2, which rejects qcow2 images with cluster size>
> 64K.  The libvirt driver creates the COW image with cluster size of 2M.
> Is this for performance reasons?  Any objections to removing that option
> and going with 'qemu-img create' default of 64K?
If I remember correctly, the qcow images are not the only problem with 
xen, but I'm far from the code for too long time. In the past (diablo), 
the method for counting the ram (and cpu perhaps?) did not work with xen 
and this affected the choices of the scheduler. I have no idea if this 
happens in essex/folsom.

Regards,
Muriel