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https://issues.apache.org/jira/browse/MAPREDUCE-737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13574626#comment-13574626
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Harsh J commented on MAPREDUCE-737:
-----------------------------------
Hey Jie,
Are you still working on any JT HA bits? If not, can we close this out in favor
of the other related JIRAs (as the talk is duplicated)? HDFS-1623 covers the NN
HA part btw.
> High Availability support for Hadoop
> ------------------------------------
>
> Key: MAPREDUCE-737
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-737
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Reporter: Jie Qiu
>
> Currently, We look at the HA of Hadoop cluster. We need to consider the
> NameNode HA as well as Jobtracker HA. For NameNode, we want to build
> primary/standy or master-slaves pattern to provide NameNode HA. Therefore, we
> need to consider how to ship log between primary/standby/slaves and how
> commit "write" operation to NameNode after the agreement among
> primary/standby/slaves on log. Whether will we use Linux HA package or
> NameNode-built-in HA package without the help of outter Linux HA package.
> After NameNode become high availability, is it necessary to provide HA for
> Jobtracker? Can Jobtracker persist the states of Jobs and tasks into HA
> NameNode? Or Jobtracker also needs the same approach from NameNode for HA
> support.
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