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https://issues.apache.org/jira/browse/HDFS-234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13167639#comment-13167639
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Jakob Homan commented on HDFS-234:
----------------------------------

bq. I think we should commit it to hdfs contrib. Please move the bkjournal 
package to contrib.
+1
                
> Integration with BookKeeper logging system
> ------------------------------------------
>
>                 Key: HDFS-234
>                 URL: https://issues.apache.org/jira/browse/HDFS-234
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: Luca Telloli
>            Assignee: Ivan Kelly
>             Fix For: HA branch (HDFS-1623), 0.24.0
>
>         Attachments: HADOOP-5189-trunk-preview.patch, 
> HADOOP-5189-trunk-preview.patch, HADOOP-5189-trunk-preview.patch, 
> HADOOP-5189-v.19.patch, HADOOP-5189.patch, HDFS-234.diff, HDFS-234.diff, 
> HDFS-234.diff, HDFS-234.diff, HDFS-234.patch, create.png, hdfs_tpt_lat.pdf, 
> zookeeper-dev-bookkeeper.jar, zookeeper-dev.jar
>
>
> BookKeeper is a system to reliably log streams of records 
> (https://issues.apache.org/jira/browse/ZOOKEEPER-276). The NameNode is a 
> natural target for such a system for being the metadata repository of the 
> entire file system for HDFS. 

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