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https://issues.apache.org/jira/browse/HDFS-14502?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Konstantin Shvachko updated HDFS-14502:
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    Status: Patch Available  (was: Open)

Simple patch adding {{saveNamespace()}}

> keepResults option in NNThroughputBenchmark should call saveNamespace()
> -----------------------------------------------------------------------
>
>                 Key: HDFS-14502
>                 URL: https://issues.apache.org/jira/browse/HDFS-14502
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 2.7.6
>            Reporter: Konstantin Shvachko
>            Assignee: Konstantin Shvachko
>            Priority: Major
>         Attachments: HDFS-14502.001.patch
>
>
> {{-keepResults}} option is usually used to make it possible to rerun  
> NNThroughputBenchmark with existing namespace state. E.g. first generate 
> files with {{create}} command and then run {{fileStatus}} command on 
> generated files.
> NNThroughputBenchmark should call {{saveNamespace()}} when {{-keepResults}} 
> option is specified. Otherwise NN startup takes a while since it needs to 
> digest large edits file starting from the empty image.



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