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HDFS-17794 Documentation for dfs.datanode.synconclose #7715

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HDFS-17794 Documentation for dfs.datanode.synconclose #7715

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d2f4b7e
Added documentation for dfs.datanode.synconclose to hdfs-default.xml
Jimvin May 27, 2025
5617e8d
Merge pull request #1 from Jimvin/synconclose-docs-patch
Jimvin May 27, 2025
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15 changes: 15 additions & 0 deletions hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
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Expand Up @@ -1779,6 +1779,21 @@
</description>
</property>

<property>
<name>dfs.datanode.synconclose</name>
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Add dfs.datanode.socket.reuse.keepalive alse ?

<value>false</value>
<description>
If this configuration is enabled, the datanode will instruct the
operating system to sync data block files contents to disk when the
blockfile is closed.

This has the benefit of ensuring that data is written to disk
immeditately when a block is closed, avoiding the data being held
in the operating system cache. This can help data loss in the event
of a malfunction such as a power failure.
</description>
</property>

<property>
<name>dfs.client.failover.max.attempts</name>
<value>15</value>
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