A State Machine for name-node blocks.
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Key: HADOOP-4563
URL: https://issues.apache.org/jira/browse/HADOOP-4563
Project: Hadoop Core
Issue Type: Improvement
Components: dfs
Reporter: Konstantin Shvachko
Fix For: 0.20.0
Blocks on the name-node can belong to different collections like the blocksMap,
under-replicated, over-replicated lists, etc.
It is getting more and more complicated to keep the lists consistent.
It would be good to formalize the movement of the blocks between the
collections using a state machine.
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