[MAPREDUCE-2186] DistributedRaidFileSystem should implement getFileBlockLocations()

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Component/s: contrib/raid
• Assignee: Ramkumar Vadali
• Reporter: Ramkumar Vadali
• Created: 12/Nov/10 21:45
• Updated: 23/May/11 17:39
• Resolved: 23/May/11 17:39

Description

If a RAIDed file has missing blocks, DistributedRaidFileSystem.getFileBlockLocations() would return no block locations. This could lead a client to believe that the file is not readable. But if parity data is available, the file actually is readable.

It would be better to implement getFileBlockLocations() and return the location of the parity blocks that would be needed to reconstruct the missing block.