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From "Gyula Fora (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (FLINK-2916) Add more context information for the StateBackend
Date Tue, 24 Nov 2015 09:49:11 GMT

     [ https://issues.apache.org/jira/browse/FLINK-2916?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Gyula Fora resolved FLINK-2916.
    Resolution: Fixed


> Add more context information for the StateBackend
> -------------------------------------------------
>                 Key: FLINK-2916
>                 URL: https://issues.apache.org/jira/browse/FLINK-2916
>             Project: Flink
>          Issue Type: Improvement
>          Components: Streaming
>            Reporter: Gyula Fora
>            Assignee: Gyula Fora
>            Priority: Minor
> The StateBackend currently only receives a very limited information about the context
in which it was initialized (only the JobID). 
> For more elaborate state backends (for instance db backends) it becomes necessary to
have more information about the running job to allow more fine-grained handling or sharding
of the stored state. 
> Changes: 
>  - The initalizeForJob method should receive the Environment of the task from which it
was called instead of just the jobId. This allows getting information about parallelism and
subtask index for instance.
> - The createKvState method should additionally receive the unique id of the operator
in the jobgraph along with the name of the created state name (jobid + operatorId + statename
creates a unique identifier for the kvState)

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