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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-543) Break FSDatasetInterface#writeToBlock() into writeToTemporary, writeToRBW, and append
Date Wed, 12 Aug 2009 18:33:14 GMT
Break FSDatasetInterface#writeToBlock() into writeToTemporary, writeToRBW, and append
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                 Key: HDFS-543
                 URL: https://issues.apache.org/jira/browse/HDFS-543
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: data-node
    Affects Versions: Append Branch
            Reporter: Hairong Kuang
            Assignee: Hairong Kuang
             Fix For: Append Branch


FSDatasetInterface#writeToBlock() currently allows to create/recover a temporary replica,
create/recover a RBW replica, or append to a replica. The implementation of the method in
FSDataset is very complicated and error prone. I'd like to break this method into 3:
1. writeToTemporary allows to create a Temporary replica or recover from a packet error for
a Tempoary replica;
2. writeToRBW allows to create a RBW replica or recover from a packet error for a RBW replica;
3. append allows to append to an existing Finalized replica.

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