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https://issues.apache.org/jira/browse/HADOOP-1914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hairong Kuang updated HADOOP-1914:
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Attachment: namenodeProtocol.patch
The patch includes:
1. First version of NamenodeProtocol that have one API, getBlocks.
2. Definition of the return value of getBlocks: BlockLocations
3. Change of Namenode & FSNamesystem to support getBlocks.
4. A JUnit test to test getBlocks.
> HDFS should have a NamenodeProtocol to allow secondary namenodes and
> rebalancing processes to communicate with a primary namenode
> ----------------------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-1914
> URL: https://issues.apache.org/jira/browse/HADOOP-1914
> Project: Hadoop
> Issue Type: New Feature
> Components: dfs
> Affects Versions: 0.14.1
> Reporter: Hairong Kuang
> Assignee: Hairong Kuang
> Fix For: 0.15.0
>
> Attachments: namenodeProtocol.patch
>
>
> For the security purpose, it is nice to have a NamenodeProtocol to allow
> secondary namenodes and rebalacing processes to communicate with a primary
> namenode. In the first version the NamenodeProtocol is going to support one
> RPC:
> BlockLocations[] getBlocks(DatanodeID datanode, long size);
> This RPC allows a rebalancing process to fetch a partial blocks map from a
> namenode. It returns a list of blocks on the given datanode and its
> locations, whose total size is the given size.
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