JiangHua Zhu created HDFS-16270:
-----------------------------------
Summary: 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
Reporter: JiangHua Zhu
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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