Bikas Saha commented on YARN-3736:

Folks, how much load is this going to add to the state store (in terms of 
actual data volume and rate of stores/updates)? The original design of the RM 
state store assumes low volume of data and updates (proportional to number of 
new applications entering the system). So asking. Please let me know if this 
has been discussed and I missed that part.

> Add RMStateStore apis to store and load accepted reservations for failover
> --------------------------------------------------------------------------
>                 Key: YARN-3736
>                 URL: https://issues.apache.org/jira/browse/YARN-3736
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: capacityscheduler, fairscheduler, resourcemanager
>            Reporter: Subru Krishnan
>            Assignee: Anubhav Dhoot
>             Fix For: 2.8.0
>         Attachments: YARN-3736.001.patch, YARN-3736.001.patch, 
> YARN-3736.002.patch, YARN-3736.003.patch, YARN-3736.004.patch, 
> YARN-3736.005.patch
> We need to persist the current state of the plan, i.e. the accepted 
> ReservationAllocations & corresponding RLESpareseResourceAllocations  to the 
> RMStateStore so that we can recover them on RM failover. This involves making 
> all the reservation system data structures protobuf friendly.

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