Introduce block committing logic during new block allocation and file close.
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Key: HDFS-565
URL: https://issues.apache.org/jira/browse/HDFS-565
Project: Hadoop HDFS
Issue Type: Sub-task
Components: hdfs client, name-node
Affects Versions: Append Branch
Reporter: Konstantin Shvachko
Assignee: Konstantin Shvachko
Fix For: Append Branch
{{ClientProtocol}} methods {{addBlock()}} and {{complete()}} need to include
additional parameter - a block, which has been successfully written to
data-nodes. By sending this block to the name-node the client confirms the
generation stamp of the block and its length. The block on the name-node
changes its state to committed and will become complete as long as one of the
finalized replicas reported by data-nodes.
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