[jira] [Updated] (HDFS-11371) Document missing metrics of erasure coding

["Yiqun Lin (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-11371?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yiqun Lin updated HDFS-11371:
-----------------------------
     Hadoop Flags: Reviewed
    Fix Version/s: 3.0.0-alpha3

Thanks [~andrew.wang] for the review. Committed to trunk.

> Document missing metrics of erasure coding
> ------------------------------------------
>
>                 Key: HDFS-11371
>                 URL: https://issues.apache.org/jira/browse/HDFS-11371
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: documentation, erasure-coding
>    Affects Versions: 3.0.0-alpha2
>            Reporter: Yiqun Lin
>            Assignee: Yiqun Lin
>            Priority: Minor
>             Fix For: 3.0.0-alpha3
>
>         Attachments: HDFS-11371.001.patch
>
>
> HDFS-8411, HDFS-11216 add some metrics of erasure coding, but it hasn't been documented. The following metrics in {{DataNodeMetrics}} is missing in documentation.
> {code}
>   @Metric("Count of erasure coding reconstruction tasks")
>   MutableCounterLong ecReconstructionTasks;
>   @Metric("Count of erasure coding failed reconstruction tasks")
>   MutableCounterLong ecFailedReconstructionTasks;
>   @Metric("Nanoseconds spent by decoding tasks")
>   MutableCounterLong ecDecodingTimeNanos;
>   @Metric("Bytes read by erasure coding worker")
>   MutableCounterLong ecReconstructionBytesRead;
>   @Metric("Bytes written by erasure coding worker")
>   MutableCounterLong ecReconstructionBytesWritten;
>   @Metric("Bytes remote read by erasure coding worker")
>   MutableCounterLong ecReconstructionRemoteBytesRead;
> {code}



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