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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-4512) Add option for persistent checkpoints
Date Wed, 12 Oct 2016 10:36:20 GMT

    [ https://issues.apache.org/jira/browse/FLINK-4512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15568348#comment-15568348

ASF GitHub Bot commented on FLINK-4512:

Github user uce commented on a diff in the pull request:

    --- Diff: flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/PendingCheckpoint.java
    @@ -256,29 +306,51 @@ public boolean acknowledgeTask(
     	 * Aborts a checkpoint because it expired (took too long).
     	public void abortExpired() throws Exception {
    --- End diff --
    I would like to do this as a follow up

> Add option for persistent checkpoints
> -------------------------------------
>                 Key: FLINK-4512
>                 URL: https://issues.apache.org/jira/browse/FLINK-4512
>             Project: Flink
>          Issue Type: Sub-task
>          Components: State Backends, Checkpointing
>            Reporter: Ufuk Celebi
>            Assignee: Ufuk Celebi
> Allow periodic checkpoints to be persisted by writing out their meta data. This is what
we currently do for savepoints, but in the future checkpoints and savepoints are likely to
diverge with respect to guarantees they give for updatability, etc.
> This means that the difference between persistent checkpoints and savepoints in the long
term will be that persistent checkpoints can only be restored with the same job settings (like
parallelism, etc.)
> Regular and persisted checkpoints should behave differently with respect to disposal
in *globally* terminal job states (FINISHED, CANCELLED, FAILED): regular checkpoints are cleaned
up in all of these cases whereas persistent checkpoints only on FINISHED. Maybe with the option
to customize behaviour on CANCELLED or FAILED.

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