[
https://issues.apache.org/jira/browse/HADOOP-4764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12653153#action_12653153
]
mry.maillist edited comment on HADOOP-4764 at 12/4/08 11:19 PM:
------------------------------------------------------------
Hi, Konstantin Shvachko
Current trunk version has implemented what you said.
But it is different from my point. You know the default replication factor for
file in hadoop-default.xml is 3. few people will modify it. And if i (as a
hadoop administrator) want to change the default value, want to limit some file
replication factor in some directory to 2. I don't know how to do now. Current
hadoop can't support it.
If i can set replication factor for directory, the file's default replication
factor will inherite its parent dir's factor. I can give different dir
different default replication factor.
Yes it is a big patch. it will modify the FSEditLog format. But it can be
compatible with old format.
Please forgive me for my poor English!
Thanks
was (Author: mry.maillist):
Hi, Konstantin Shvachko
Current trunk version has implemented what you said.
But it is different from my point. You know the default replication factor for
file in hadoop-default.xml is 3. few people will modify it. And if i (as a
hadoop administrator) want to change the default value, want to limit some file
replication factor in some directory to 2. I don't know how to do now. Current
hadoop can't support it.
If i can set replication factor for directory, the file's default replication
factor will inherite its parent dir's factor. I can give different dir
different default replication factor.
Yes it is a big patch. it will modify the image format. But it can be
compatible with old format.
Please forgive me for my poor English!
Thanks
> 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.
>
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
