On 11 November 2013 12:04, Alexander Kuznetsov <[email protected]> wrote: > Hi all, > > While studying Hadoop performance in a virtual environment, I found an > interesting problem with Nova scheduling. In OpenStack cluster, we have > overcommit policy, allowing to put on one compute more vms than resources > available for them. While it might be suitable for general types of > workload, this is definitely not the case for Hadoop clusters, which usually > consume 100% of system resources. > > Is there any way to tell Nova to schedule specific instances (the ones which > consume 100% of system resources) without overcommitting resources on > compute node?
You could have a flavor with "no-overcommit" extra spec, and modify the over-commit calculation in the scheduler on that case, but I don't remember seeing that in there. John _______________________________________________ OpenStack-dev mailing list [email protected] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
