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https://issues.apache.org/jira/browse/HDFS-16270?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu resolved HDFS-16270.
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Resolution: Not A Problem
> Improve NNThroughputBenchmark#printUsage() related to block size
> ----------------------------------------------------------------
>
> Key: HDFS-16270
> URL: https://issues.apache.org/jira/browse/HDFS-16270
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: benchmarks, namenode
> Reporter: JiangHua Zhu
> Assignee: JiangHua Zhu
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> When using the NNThroughputBenchmark test, if the usage is not correct, we
> will get some prompt messages.
> E.g:
> '
> If connecting to a remote NameNode with -fs option,
> dfs.namenode.fs-limits.min-block-size should be set to 16.
> 21/10/13 11:55:32 INFO util.ExitUtil: Exiting with status -1: ExitException
> '
> Yes, this way is good.
> However, the setting of'dfs.blocksize' has been completed before execution,
> for example:
> conf.setInt(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, 16);
> We will still get the above prompt, which is wrong.
> At the same time, it should also be explained. The hint here should not be
> for'dfs.namenode.fs-limits.min-block-size', but should be'dfs.blocksize'.
> Because in the NNThroughputBenchmark construction,
> the'dfs.namenode.fs-limits.min-block-size' has been set to 0 in advance.
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