Run multiple caching schedulers

Registered by John Garbutt on 2014-01-20

Extend the caching scheduler with some resource locking to enable the running of multiple schedulers when running the caching scheduler.

The idea involves:
* talking a lock (with timeout) of resources from compute resource manager
* refreshing the resource manager lock to prevent timeouts
* attempt to reduce resource races before adding into cache, and reduce races removing from cache
* running multiple schedulers, each with its own in-memory cache of decisions

A future idea could include:
* a shared cache between schedulers, possibly replacing the resource manager resource commit

Dependency:
this is dependent on the caching-scheduler working out OK

Blueprint information

Status:
Not started
Approver:
None
Priority:
Undefined
Drafter:
John Garbutt
Direction:
Needs approval
Assignee:
John Garbutt
Definition:
Drafting
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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Removed from next, as next is now reserved for near misses from the last milestone --johnthetubaguyRemoved from next, as next is now reserved for near misses from the last milestone --johnthetubaguy

Marking this blueprint as definition: Drafting. If you are still working on this, please re-submit via nova-specs. If not, please mark as obsolete, and add a quick comment to describe why. --johnthetubaguy (20th April 2014)

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