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https://issues.apache.org/jira/browse/HDFS-2591?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon updated HDFS-2591:
------------------------------

    Attachment: hdfs-2591-v2.txt

v2 patch fixes a number of issues discovered trying to build HA test cases on 
top of this. In particular, it has code to set up shared edits directories (to 
be enabled by HDFS-1971), as well as initialize the SBNN by copying one of the 
formatted namedirs from the active NN. (otherwise the two NNs would have 
different nsids/bpids and not be able to failover).
                
> HA: MiniDFSCluster support to mix and match federation with HA
> --------------------------------------------------------------
>
>                 Key: HDFS-2591
>                 URL: https://issues.apache.org/jira/browse/HDFS-2591
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha, test
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-2591-v2.txt, hdfs-2591.txt
>
>
> Right now the MiniDFS builder is somewhat inflexible - it just takes a 
> "numNameNodes" parameter, which is used to specify federated nameservices. In 
> order to add HA support, we need to be able to be more specific when 
> configuring the NNs -- eg to test the case where there is one nameservice 
> that is HA and another which is not.

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