[openstack-dev] [Nova] FFE Request: Solver Scheduler: Complex constraint based resource placement
sean at dague.net
Wed Mar 5 22:12:03 UTC 2014
On 03/05/2014 03:40 PM, Yathiraj Udupi (yudupi) wrote:
> We would like to make a request for FFE for the Solver Scheduler work.
> A lot of work has gone into it since Sep’13, and the first patch has
> gone through several iteration after some reviews. The first patch
> - https://review.openstack.org/#/c/46588/ introduces the main solver
> scheduler driver, and a reference solver implementation, and the
> subsequent patches that are already added provide the pluggable solver,
> and individual support for adding constraints, costs, etc.
> First Patch: https://review.openstack.org/#/c/46588/
> Second patch with enhanced support for pluggable constraints and costs:
> - https://review.openstack.org/#/c/70654/
> Subsequent patches add the constraints and the costs.
> BP: https://blueprints.launchpad.net/nova/+spec/solver-scheduler
> Core sponsor: Joe Gordon
> John Garbutt expressed concerns in Blueprint whiteboard regarding the
> configuration values, existing filters,etc and I noticed that you have
> un-approved this BP.
> John, I will discuss with you in detail over IRC.
> But briefly, the plan is not many new configuration values will be
> added, just the ones to specify the solver to use, and the pluggable
> constraints, and costs to use, with the weights for the costs. (these
> are mainly part of the second patch -
> <https://review.openstack.org/#/c/70654/> )
> The plan is to gradually support the concepts for the existing filters
> as the constraints that are accepted by our Solver Scheduler.
> Depending on the constraints and the costs chosen, the final scheduling
> will be done by solving the problem as an optimization problem.
> Please reconsider this blueprint, and allow a FFE.
> OpenStack-dev mailing list
> OpenStack-dev at lists.openstack.org
This does not seem small or low risk in any way. And the blueprint is
not currently approved.
Also, as far as I can tell you never actually talked with Joe Gordon
about him supporting the FFE.
This needs to wait for Juno.
Samsung Research America
sean at dague.net / sean.dague at samsung.com
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