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https://issues.apache.org/jira/browse/HDFS-15882?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaoqiao He resolved HDFS-15882.
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Fix Version/s: 3.4.0
Hadoop Flags: Reviewed
Resolution: Fixed
Committed to trunk. Thanks [~lamberken] for your report and contributions!
> Fix incorrectly initializing RandomAccessFile based on configuration options
> ----------------------------------------------------------------------------
>
> Key: HDFS-15882
> URL: https://issues.apache.org/jira/browse/HDFS-15882
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Xie Lei
> Assignee: Xie Lei
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0
>
> Time Spent: 2h 10m
> Remaining Estimate: 0h
>
> `rw` Open for reading and writing. If the file does not already exist then an
> attempt will be made to create it.
> `rws` Require that every update to the file's content or metadata be written
> synchronously to the underlying storage device.
> From the literal meaning of this variable `shouldSyncWritesAndSkipFsync`, we
> should use `rw` when `shouldSyncWritesAndSkipFsync` is true.
> We use SATA disk to store the journal node's data. It's not effective for
> improving RPC performance whether the `shouldSyncWritesAndSkipFsync` variable
> is true or false. it's caused by initializing RandomAccessFile incorrectly.
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