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From "Kihwal Lee (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-8315) Datanode does not log reads
Date Fri, 08 May 2015 15:23:01 GMT

     [ https://issues.apache.org/jira/browse/HDFS-8315?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kihwal Lee updated HDFS-8315:
-----------------------------
    Resolution: Won't Fix
        Status: Resolved  (was: Patch Available)

> Datanode does not log reads
> ---------------------------
>
>                 Key: HDFS-8315
>                 URL: https://issues.apache.org/jira/browse/HDFS-8315
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Kihwal Lee
>            Assignee: Kihwal Lee
>            Priority: Critical
>              Labels: BB2015-05-TBR
>         Attachments: HDFS-8315.patch
>
>
> HDFS-6836 made datanode read request logging DEBUG.  There is a good reason why it was
at INFO for so many years.  This is very useful in debugging load issues. This jira will revert
HDFS-6836.
> We haven't seen it being a bottleneck on busy hbase clusters, but if someone thinks it
is a serious overhead, please make it configurable in a separate jira.



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