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https://issues.apache.org/jira/browse/HADOOP-4764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12653664#action_12653664
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Zheng Shao commented on HADOOP-4764:
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So the modification of the image format is the extra default replication factor
information of the directory?
Another similar approach is to create a dummy file (e..g, ".default.attribute"
under a directory and set the default block replication number on that dummy
file.
This won't require modifying the image format. Other changes are similar.
Does that sound better Konstantin?
> add replication factor for hdfs directory
> -----------------------------------------
>
> Key: HADOOP-4764
> URL: https://issues.apache.org/jira/browse/HADOOP-4764
> Project: Hadoop Core
> Issue Type: New Feature
> Components: dfs
> Reporter: Ruyue Ma
> Assignee: Ruyue Ma
>
> If we can set replication factor for directory. we can modify the
> DFSClent.create() method, pass 0 for the default block replication. Namenode
> check create request, if blockreplication is 0, it will give its parent dir
> replication factor to the file blockreplication factor. This will simplify
> the administration work. You know we can set /Test or /Tmp dir's replication
> factor 2 or 1, then all their children files and dirs replication factor is 2
> or 1 defaultly.
>
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