Dear all, As promised in the Scheduler/Gantt meeting, here is our analysis on the connection between Policy Based Scheduler and Solver Scheduler:
https://docs.google.com/document/d/1RfP7jRsw1mXMjd7in72ARjK0fTrsQv1bqolOri IQB2Y This document briefs the mechanism of the two schedulers and the possibility of cooperation. It is my personal point of view only. In a nutshell, Policy Based Scheduler allows admin to define policies for different physical resources (an aggregate, an availability-zone, or all infrastructure) or different (classes of) users. Admin can modify (add/remove/modify) any policy in runtime, and the modification effect is only in the target (e.g. the aggregate, the users) that the policy is defined to. Solver Scheduler solves the placement of groups of instances simultaneously by putting all the known information into a integer linear system and uses Integer Program solver to solve the latter. Thus relation between VMs and between VMs-computes are all accounted for. If working together, Policy Based Scheduler can supply the filters and weighers following the policies rules defined for different computes. These filters and weighers can be converted into constraints & cost function for Solver Scheduler to solve. More detailed will be found in the doc. I look forward for comments and hope that we can work it out. Best regards, Khanh-Toan TRAN _______________________________________________ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
