[
https://issues.apache.org/jira/browse/FLINK-19761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17218839#comment-17218839
]
Till Rohrmann commented on FLINK-19761:
---------------------------------------
Thanks for creating this issue [~xuannan]. How will this work if the
{{ShuffleMaster}} you are asking does not know about the cluster partition
(e.g. if you are using two distinct external shuffle services or when using the
NettyShuffleService if you are requesting a cluster partition from a different
cluster)?
> Add lookup method for registered ShuffleDescriptor in ShuffleMaster
> -------------------------------------------------------------------
>
> Key: FLINK-19761
> URL: https://issues.apache.org/jira/browse/FLINK-19761
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Network
> Reporter: Xuannan Su
> Priority: Major
>
> Currently, the ShuffleMaster can register a partition and get the shuffle
> descriptor. However, it lacks the ability to look up the registered
> ShuffleDescriptors belongs to an IntermediateResult by the
> IntermediateDataSetID.
> Adding the lookup method to the ShuffleMaster can make reusing the cluster
> partition more easily. For example, we don't have to return the
> ShuffleDescriptor to the client just so that the other job can somehow encode
> the ShuffleDescriptor in the JobGraph to consume the cluster partition.
> Instead, we only need to return the IntermediateDatSetID and use it to lookup
> the ShuffleDescriptor by another job.
> By adding the lookup method in ShuffleMaster, if we have an external shuffle
> service and the lifecycle of the IntermediateResult is not bounded to the
> cluster, we can look up the ShuffleDescriptor and reuse the
> IntermediateResult by a job running on another cluster even if the cluster
> that produced the IntermediateResult is shutdown.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
