On 28 November 2013 10:14, Daniel P. Berrange <berra...@redhat.com> wrote:
> For this specific block zero'ing case it occurred to me that it might > be sufficient to just invoke 'ionice dd' instead of 'dd' and give it > a lower I/O priority class than normal. Excuse the thread necromancy, I've just been searching for thoughts about this very issue. I've merged a patch that does I/O nice, and it helps, but it is easy to DoS a volume server by creating and deleting volumes fast while maintaining a high i/o load... the zeroing never runs and so you run out of allocatable space. I'll take a look at writing something with more controls than dd for doing the zeroing... _______________________________________________ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
