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[ https://issues.apache.org/jira/browse/HDFS-1171?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ramkumar Vadali resolved HDFS-1171.
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Resolution: Invalid

Recreating this in Map/Reduce: MAPREDUCE-2150
RaidNode should fix missing blocks directly on Data Node
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Key: HDFS-1171
URL: https://issues.apache.org/jira/browse/HDFS-1171
Project: Hadoop HDFS
Issue Type: Task
Components: contrib/raid
Affects Versions: 0.20.1
Reporter: Ramkumar Vadali
Assignee: Ramkumar Vadali

RaidNode currently does not fix missing blocks. The missing blocks have to be fixed manually.
This task proposes that recovery be more automated:
1. RaidNode periodically fetches a list of corrupt files from the NameNode
2. If the corrupt files has a RAID parity file, RaidNode identifies missing block(s) in the file and recomputes the block(s) using the parity file and other good blocks
3. RaidNode sends the generated block contents to a DataNode
a. RaidNode chooses a DataNode with the most available space to send the block.
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postedMay 21, '10 at 4:51p
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