ability to create a file whose newly allocated blocks are automatically
persisted immediately
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Key: HDFS-1108
URL: https://issues.apache.org/jira/browse/HDFS-1108
Project: Hadoop HDFS
Issue Type: Improvement
Components: name-node
Reporter: dhruba borthakur
Assignee: dhruba borthakur
The current HDFS design says that newly allocated blocks for a file are not
persisted in the NN transaction log when the block is allocated. Instead, a
hflush() or a close() on the file persists the blocks into the transaction log.
It would be nice if we can immediately persist newly allocated blocks (as soon
as they are allocated) for specific files.
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