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Type:
Improvement
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Status: Open
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Priority:
Minor
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Resolution: Unresolved
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Affects Version/s: 3.2.0
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Fix Version/s: None
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Component/s: datanode
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Labels:None
For many years (7+) now, the JDK has been using a default buffer size of 8192 bytes. Hadoop still defaults to a size half of that. The default is dfs.stream-buffer-size is 4096 bytes.
https://hadoop.apache.org/docs/r2.8.0/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml
Please increase default size to 8192.
- relates to
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HDFS-14294 Deprecate DFSUtilClient#getSmallBufferSize
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- Patch Available
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