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https://issues.apache.org/jira/browse/HBASE-6116?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13400180#comment-13400180
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Jonathan Hsieh commented on HBASE-6116:
---------------------------------------

Wow, nice!  

Is there any reason why the tests weren't run on exactly the same EC2 instances 
with different configuration/binaries?  

Is the variation due to EC2 node variation or because of the software changes? 
Do you think that matters?  



                
> Allow parallel HDFS writes for HLogs.
> -------------------------------------
>
>                 Key: HBASE-6116
>                 URL: https://issues.apache.org/jira/browse/HBASE-6116
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>         Attachments: 6116-v1.txt, pipelined-vs-parallel-comparison.zip
>
>
> In HDFS-1783 I adapted Dhrubas changes to be used in Hadoop trunk.
> This issue will include the necessary reflection changes to optionally enable 
> this for the WALs in HBase.

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