[jira] [Created] (FLINK-14892) Add description for checkpoint directory layout

[Shang Yuanchun (Jira)]

Congxian Qiu(klion26) created FLINK-14892:
---------------------------------------------

             Summary: Add description for checkpoint directory layout
                 Key: FLINK-14892
                 URL: https://issues.apache.org/jira/browse/FLINK-14892
             Project: Flink
          Issue Type: Improvement
          Components: Documentation, Runtime / Checkpointing
            Reporter: Congxian Qiu(klion26)
             Fix For: 1.10.0


In FLINK-8531, we change the checkpoint directory layout to
{code:java}
/user-defined-checkpoint-dir
    |
    + --shared/
    + --taskowned/
    + --chk-00001/
    + --chk-00002/
    + --chk-00003/
    ...
{code}
But the directory layout did not describe in the doc currently, and I found some users confused about this, such as[1][2], so I propose to add a description for the checkpoint directory layout in the documentation, maybe in the page {{checkpoints#DirectoryStructure}}[3]

 [1] [http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Flink-checkpointing-behavior-td30749.html#a30751]

 [2] [http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Apache-Flink-Operator-name-and-uuid-best-practices-td31031.html]

 [3] [https://ci.apache.org/projects/flink/flink-docs-release-1.9/ops/state/checkpoints.html#directory-structure]



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