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https://issues.apache.org/jira/browse/HDFS-12967?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16790147#comment-16790147
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Chen Zhang commented on HDFS-12967:
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{quote}Did you try {{TestDFSIO}} instead. Should be the right tool for scale
testing.
{quote}
ThanksĀ [~shv] for your advice, we used TestDFSIO to measure the cluster
throughput and performance, I think it's more suitable for data access
performance testingļ¼NNBench, as it's name implies, is special designed for
stress test of NameNode operations
{quote}Also NNBench has {{-baseDir}} option.
{quote}
My patch is just some minor changes on this option to make NNBench support
multi-cluster
> NNBench should support multi-cluster access
> -------------------------------------------
>
> Key: HDFS-12967
> URL: https://issues.apache.org/jira/browse/HDFS-12967
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: benchmarks
> Reporter: Chen Zhang
> Assignee: Chen Zhang
> Priority: Major
> Attachments: HDFS-12967-001.patch, HDFS-12967-002.patch
>
>
> Sometimes we need to run NNBench for some scaling tests after made some
> improvements on NameNode, so we have to deploy a new HDFS cluster and a new
> Yarn cluster.
> If NNBench support multi-cluster access, we only need to deploy a new HDFS
> test cluster and add it to existing YARN cluster, it'll make the scaling test
> easier.
> Even more, if we want to do some A-B test, we have to run NNBench on
> different HDFS clusters, this patch will be helpful.
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