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https://issues.apache.org/jira/browse/HDFS-4618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13617310#comment-13617310
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Hudson commented on HDFS-4618:
------------------------------
Integrated in Hadoop-Hdfs-trunk #1358 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/1358/])
HDFS-4618. Default transaction interval for checkpoints is too low.
Contributed by Todd Lipcon. (Revision 1461783)
Result = FAILURE
todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1461783
Files :
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/site/apt/HdfsUserGuide.apt.vm
> default for checkpoint txn interval is too low
> ----------------------------------------------
>
> Key: HDFS-4618
> URL: https://issues.apache.org/jira/browse/HDFS-4618
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.0.4-alpha
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 3.0.0, 2.0.5-beta
>
> Attachments: hdfs-4618.txt
>
>
> The default checkpoint interval is currently set to 40k transactions. That's
> way too low (I don't know what idiot set it to that.. oh wait, it was me...)
> The old default in 1.0 is 64MB. Assuming an average of 100 bytes per txn, we
> should have the txn-count based interval default to at least 640,000. I'd
> like to change to 1M as a nice round number.
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