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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-1108) ability to create a file whose newly allocated blocks are automatically persisted immediately
Date Fri, 23 Apr 2010 23:32:50 GMT
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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