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Posted to issues@flink.apache.org by StephanEwen <gi...@git.apache.org> on 2016/09/27 18:04:47 UTC

[GitHub] flink issue #2550: [FLINK-4657] Implement HighAvailabilityServices based on ...

Github user StephanEwen commented on the issue:

    https://github.com/apache/flink/pull/2550
  
    Can we try and unify the structure / paths under which all this information is stored in ZooKeeper?
    
    ```
    /flink
         +/cluster_id_1/resource_manager_lock
         |            |
         |            +/job-id-1/job_manager_lock
         |            |         /checkpoints/latest
         |            |                     /latest-1
         |            |                     /latest-2
         |            |
         |            +/job-id-2/job_manager_lock
         |      
         +/cluster_id_2/resource_manager_lock
                      |
                      +/job-id-1/job_manager_lock
                               |/checkpoints/latest
                               |            /latest-1
                               |/persisted_job_graph
    ```
    The "cluster-id" should be a generated UUID in the case of YARN/Mesos, and should be a config value in the standalone case. In Yarn / Mesos, the UUID should be passed via an environment variable to the Java processes with the entry points for TaskManager / JobManager / ResourceManager.
    
    In the Constructor, the ZooKeeper HA Services should get the "cluster-id".


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