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Posted to hdfs-issues@hadoop.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/03/07 10:50:00 UTC
[jira] [Work logged] (HDFS-15882) Fix incorrectly initializing
RandomAccessFile based on configuration options
[ https://issues.apache.org/jira/browse/HDFS-15882?focusedWorklogId=561946&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-561946 ]
ASF GitHub Bot logged work on HDFS-15882:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 07/Mar/21 10:49
Start Date: 07/Mar/21 10:49
Worklog Time Spent: 10m
Work Description: leosunli commented on pull request #2751:
URL: https://github.com/apache/hadoop/pull/2751#issuecomment-792256266
LGTM
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Issue Time Tracking
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Worklog Id: (was: 561946)
Remaining Estimate: 0h
Time Spent: 10m
> 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
> Time Spent: 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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