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From "Todd Lipcon (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-309) FSEditLog should log progress during replay
Date Mon, 27 Feb 2012 20:59:49 GMT

    [ https://issues.apache.org/jira/browse/HDFS-309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13217554#comment-13217554
] 

Todd Lipcon commented on HDFS-309:
----------------------------------

Having this trace information seems useful -- but a bit too verbose. How about we make the
full trace happen at TRACE level (LOG.isTraceEnabled()), but at INFO level periodically log
something like:
replaying edit log: completed 1000/40000 transactions (3%)
                
> FSEditLog should log progress during replay
> -------------------------------------------
>
>                 Key: HDFS-309
>                 URL: https://issues.apache.org/jira/browse/HDFS-309
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Todd Lipcon
>            Assignee: Sho Shimauchi
>              Labels: newbie
>         Attachments: HDFS-309.txt
>
>
> When the NameNode is replaying a long edit log, it's handy to have reports on how far
through it is, so you can judge how much time it is remaining.

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