[MAPREDUCE-2155] RaidNode should optionally dispatch map reduce jobs to fix corrupt blocks (instead of fixing locally)

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.23.0
• Fix Version/s: 0.23.0
• Component/s: contrib/raid
• Hadoop Flags: Reviewed
• Assignee: Patrick Kling
• Reporter: Patrick Kling
• Created: 26/Oct/10 17:06
• Updated: 02/May/13 02:29
• Resolved: 30/Nov/10 06:25

Description

Recomputing blocks based on parity information is expensive. Rather than doing this locally at the RaidNode, we should run map reduce jobs. This will allow us to quickly fix a large number of corrupt or missing blocks.

Issue Links

• depends upon: MAPREDUCE-2150 RaidNode should periodically fix corrupt blocks