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https://issues.apache.org/jira/browse/HDFS-5675?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13851211#comment-13851211
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Konstantin Shvachko commented on HDFS-5675:
-------------------------------------------
mkdirs is indeed an interesting operation for benchmarking as one of the
simplest modification of the namespace.
Comments on the patch:
# The operation should be called mkdirs not mkdir. And the Stats class should
be {{MkdirsStats}}, no "File". Don't forget to update op name and usage
constants.
# You are now creating a flat collection of directories. Would be good to
support multi-level structure, same as {{-filesPerDir}} in {{CreateFileStats}}.
Too many entries in one directory can be a performance issues by itself, so it
is good to have flexibility.
Also, please adjust jira fields.
> Add Mkdirs operation to NNThroughputBenchmark
> ---------------------------------------------
>
> Key: HDFS-5675
> URL: https://issues.apache.org/jira/browse/HDFS-5675
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: benchmarks
> Reporter: Plamen Jeliazkov
> Assignee: Plamen Jeliazkov
> Priority: Minor
> Fix For: 3.0.0
>
> Attachments: mkdirsBenchmarkPatchTrunk.patch
>
>
> I did some work to extend NNThroughputBenchmark that I would like to
> contribute to the community. It is pretty straightforward; just adding a
> Mkdir operation to the test in order to see the operations per second of a
> multiple 'mkdir' commands.
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