[libvirt] Effect of cluster size on read write performance

Daniel P. Berrange berrange at redhat.com
Wed Feb 22 08:20:24 UTC 2012

On Wed, Feb 22, 2012 at 12:36:00PM +0530, Pankaj Rawat wrote:
> Hi all 
> The cluster -size increase write performance when the qcow2 image is not
> expanded , surely with increase in cluster_size the disk space used
> increases but that is not my concern.
> Can anyone tell what is the effect of cluster size on read and write
> performance on qcow2 image after expantion?

Can you send this query to qemu-devel instead - they'll likely be able
to give you a more accurate answer than folks here, since they are more
familiar with these aspects of Qcow2

|: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org              -o-             http://virt-manager.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: http://entangle-photo.org       -o-       http://live.gnome.org/gtk-vnc :|

More information about the libvir-list mailing list