Wangda Tan commented on YARN-7402:

[~curino] / [~subru], thanks for working on this improvement, is there any 
design/explanation doc so we can understand the overall idea and scope?

> Federation V2: Global Optimizations
> -----------------------------------
>                 Key: YARN-7402
>                 URL: https://issues.apache.org/jira/browse/YARN-7402
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: federation
>            Reporter: Carlo Curino
>            Assignee: Carlo Curino
>            Priority: Major
> YARN Federation today requires manual configuration of queues within each 
> sub-cluster, and each RM operates "in isolation". This has few issues:
> # Preemption is computed locally (and might far exceed the global need)
> # Jobs within a queue are forced to consume their resources "evenly" based on 
> queue mapping
> This umbrella JIRA tracks a new feature that leverages the 
> FederationStateStore as a synchronization mechanism among RMs, and allows for 
> allocation and preemption decisions to be based on a (close to up-to-date) 
> global view of the cluster allocation and demand. The JIRA also tracks 
> algorithms to automatically generate policies for Router and AMRMProxy to 
> shape the traffic to each sub-cluster, and general "maintenance" of the 
> FederationStateStore.

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