Yiqun Lin created HDFS-13884:
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             Summary: Improve the description of the setting dfs.image.compress
                 Key: HDFS-13884
                 URL: https://issues.apache.org/jira/browse/HDFS-13884
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: documentation
    Affects Versions: 3.1.1
            Reporter: Yiqun Lin
            Assignee: Ryan Wu


In HDFS-1435, we introduced a new option to store fsimage compressed. And this 
can avoid that It consumes a lot of network bandwidth when SBN do uploads a new 
fsimage to ANN. When lots of network bandwidth was consumed, it will affect ANN 
to deal with normal RPC requests or sync edit logs.

This is a very useful setting when our fsimage file is very large. However 
current description of this setting is too simple, we can document this more.
{noformat}
<property>
  <name>dfs.image.compress</name>
  <value>false</value>
  <description>Should the dfs image be compressed?
  </description>
</property>
{noformat}



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