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From "Till Rohrmann (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-3756) Introduce state hierarchy in CheckpointCoordinator
Date Thu, 14 Apr 2016 09:12:25 GMT
Till Rohrmann created FLINK-3756:
------------------------------------

             Summary: Introduce state hierarchy in CheckpointCoordinator
                 Key: FLINK-3756
                 URL: https://issues.apache.org/jira/browse/FLINK-3756
             Project: Flink
          Issue Type: Sub-task
          Components: JobManager
    Affects Versions: 1.1.0
            Reporter: Till Rohrmann
            Assignee: Till Rohrmann
             Fix For: 1.1.0


Currently, the {{CheckpointCoordinator}} stores the state handles for all tasks in a list.
This lack of structure does not allow to easily group all tasks belonging to the same {{ExecutionJobVertex}}
together. With the introduction of key groups, it will be necessary to store the key-group
state handles of the different tasks grouped together to make them easily accessible for redistribution.


Therefore, I propose to introduce the notion of a state for task groups which groups the state
for all tasks belonging to the same {{ExecutionJobVertex}} together. This task group can then
also be used to accumulate the key-group states from the different tasks.



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