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From Sunil G <sun...@apache.org>
Subject Re: [DISCUSS] Merge YARN-6592 to trunk
Date Fri, 26 Jan 2018 02:44:31 GMT

Thanks Arun.

I did manual testing for check affinity and anti-affinity features with
placement allocator. Also checked SLS to see any performance regression,
and there are not much difference as Arun mentioned.

Thanks all the folks for working on this. Kudos!

- Sunil

On Fri, Jan 26, 2018 at 5:16 AM Arun Suresh <asuresh@apache.org> wrote:

> Hello yarn-dev@
> We feel that the YARN-6592 dev branch mostly in shape to be merged into
> trunk. This branch adds support for placing containers in YARN using rich
> placement constraints. For example, this can be used by applications to
> co-locate containers on a node or rack (*affinity *constraint), spread
> containers across nodes or racks (*anti-affinity* constraint), or even
> specify the maximum number of containers on a node/rack (*cardinality *
> constraint).
> We have integrated this feature into the Distributed-Shell application for
> feature testing. We have performed end-to-end testing on moderately-sized
> clusters to verify that constraints work fine. Performance tests have been
> done via both SLS tests and Capacity Scheduler performance unit tests, and
> no regression was found. We have opened a JIRA to track Jenkins acceptance
> of the aggregated patch [2]. Documentation is in the process of being
> completed [3]. You can also check our design document for more details [4].
> Config flags are needed to enable this feature and it should not have any
> effect on YARN when turned off. Once merged, we plan to work on further
> improvements, which can be tracked in the umbrella YARN-7812 [5].
> Kindly do take a look at the branch and raise issues/concerns that need to
> be addressed before the merge.
> Many thanks to Konstantinos, Wangda, Panagiotis, Weiwei, and Sunil for
> their contributions to this effort, as well as Subru, Chris, Carlo, and
> Vinod for their inputs and discussions.
> Cheers
> -Arun
> [1] https://issues.apache.org/jira/browse/YARN-6592
> [2] https://issues.apache.org/jira/browse/YARN-7792
> [3] https://issues.apache.org/jira/browse/YARN-7780
> [4]
> https://issues.apache.org/jira/secure/attachment/12867869/YARN-6592-Rich-Placement-Constraints-Design-V1.pdf
> [5] https://issues.apache.org/jira/browse/YARN-7812

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