Hello, Jay, As a fork of nova-scheduler, Gantt most likely will handle initial placement. However, even nova-scheduler now supports some runtime operations (for example, scheduling of evacuated/migrated instances).
Given the runtime scheduling arises in this list regularly, I guess such features will make their way into Scheduler service eventually. -- Best regards, Oleg Gelbukh On Wed, Apr 9, 2014 at 7:47 PM, Jay Lau <jay.lau....@gmail.com> wrote: > @Oleg, Till now, I'm not sure the target of Gantt, is it for initial > placement policy or run time policy or both, can you help clarify? > > @Henrique, not sure if you know IBM PRS (Platform Resource Scheduler) [1], > we have finished the "dynamic scheduler" in our Icehouse version (PRS 2.2), > it has exactly the same feature as your described, we are planning a live > demo for this feature in Atlanta Summit. I'm also writing some document for > run time policy which will cover more run time policies for OpenStack, but > not finished yet. (My shame for the slow progress). The related blueprint > is [2], you can also get some discussion from [3] > > [1] > http://www-01.ibm.com/common/ssi/cgi-bin/ssialias?infotype=AN&subtype=CA&htmlfid=897/ENUS213-590&appname=USN > [2] > https://blueprints.launchpad.net/nova/+spec/resource-optimization-service > [3] http://markmail.org/~jaylau/OpenStack-DRS > > Thanks. > > > 2014-04-09 23:21 GMT+08:00 Oleg Gelbukh <ogelb...@mirantis.com>: > > Henrique, >> >> You should check out Gantt project [1], it could be exactly the place to >> implement such features. It is a generic cross-project Scheduler as a >> Service forked from Nova recently. >> >> [1] https://github.com/openstack/gantt >> >> -- >> Best regards, >> Oleg Gelbukh >> Mirantis Labs >> >> >> On Wed, Apr 9, 2014 at 6:41 PM, Henrique Truta < >> henriquecostatr...@gmail.com> wrote: >> >>> Hello, everyone! >>> >>> I am currently a graduate student and member of a group of contributors >>> to OpenStack. We believe that a dynamic scheduler could improve the >>> efficiency of an OpenStack cloud, either by rebalancing nodes to maximize >>> performance or to minimize the number of active hosts, in order to minimize >>> energy costs. Therefore, we would like to propose a dynamic scheduling >>> mechanism to Nova. The main idea is using the Ceilometer information (e.g. >>> RAM, CPU, disk usage) through the ceilometer-client and dinamically decide >>> whether a instance should be live migrated. >>> >>> This might me done as a Nova periodic task, which will be executed every >>> once in a given period or as a new independent project. In both cases, the >>> current Nova scheduler will not be affected, since this new scheduler will >>> be pluggable. We have done a search and found no such initiative in the >>> OpenStack BPs. Outside the community, we found only a recent IBM >>> announcement for a similiar feature in one of its cloud products. >>> >>> A possible flow is: In the new scheduler, we periodically make a call to >>> Nova, get the instance list from a specific host and, for each instance, we >>> make a call to the ceilometer-client (e.g. $ ceilometer statistics -m >>> cpu_util -q resource=$INSTANCE_ID) and then, according to some specific >>> parameters configured by the user, analyze the meters and do the proper >>> migrations. >>> >>> Do you have any comments or suggestions? >>> >>> -- >>> Ítalo Henrique Costa Truta >>> >>> >>> >>> _______________________________________________ >>> OpenStack-dev mailing list >>> OpenStack-dev@lists.openstack.org >>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev >>> >>> >> >> _______________________________________________ >> OpenStack-dev mailing list >> OpenStack-dev@lists.openstack.org >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev >> >> > > > -- > Thanks, > > Jay > > _______________________________________________ > OpenStack-dev mailing list > OpenStack-dev@lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > >
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