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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FLINK-11696) [checkpoint] Avoid to send mkdir requests to DFS from task side
Date Fri, 08 Mar 2019 06:23:00 GMT

     [ https://issues.apache.org/jira/browse/FLINK-11696?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

ASF GitHub Bot updated FLINK-11696:
    Labels: pull-request-available  (was: )

> [checkpoint] Avoid to send mkdir requests to DFS from task side
> ---------------------------------------------------------------
>                 Key: FLINK-11696
>                 URL: https://issues.apache.org/jira/browse/FLINK-11696
>             Project: Flink
>          Issue Type: Improvement
>          Components: Runtime / Checkpointing
>            Reporter: Yun Tang
>            Assignee: Yun Tang
>            Priority: Major
>              Labels: pull-request-available
> Currently, when we create checkpoint directory in the distributed file system. Not only
{{CheckpointCoordinator}} but also {{FsCheckpointStorage}} in {{StreamTask}} would create
the {{checkpointsDirectory}}, {{sharedStateDirectory}} and {{taskOwnedStateDirectory}}. These
many {{mkdir}} RPC requests would cause a very high pressure on the distributed file system,
especially when the parallelism is large or jobs continue to failover again and again.
> We could avoid these {{mkdir}} requests from task side if writing to a distributed file

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