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Date: Sun, 3 Jul 2011 05:54:21 +0000 (UTC)
From: "dhruba borthakur (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HDFS-2123) 1073: Checkpoint interval should be
 based on txn count, not size
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    [ https://issues.apache.org/jira/browse/HDFS-2123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13059162#comment-13059162 ] 

dhruba borthakur commented on HDFS-2123:
----------------------------------------

+1, code looks good.

what happens if somebody still has dfs.namenode.checkpoint.size in the config file, will it have any effect or will it be ignored?

> 1073: Checkpoint interval should be based on txn count, not size
> ----------------------------------------------------------------
>
>                 Key: HDFS-2123
>                 URL: https://issues.apache.org/jira/browse/HDFS-2123
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: name-node
>    Affects Versions: Edit log branch (HDFS-1073)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: Edit log branch (HDFS-1073)
>
>         Attachments: hdfs-2123.txt
>
>
> Currently, the administrator can configure the secondary namenode to checkpoint either every N seconds, or every N bytes worth of edit log. It would make more sense to get rid of the size-based interval and instead allow the administrator to specify checkpoints every N transactions. This also simplifies the code a little bit.

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