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From "Todd Lipcon (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3190) Simple refactors in existing NN code to assist QuorumJournalManager extension
Date Tue, 03 Apr 2012 21:02:22 GMT
Simple refactors in existing NN code to assist QuorumJournalManager extension
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                 Key: HDFS-3190
                 URL: https://issues.apache.org/jira/browse/HDFS-3190
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: name-node
    Affects Versions: 2.0.0
            Reporter: Todd Lipcon
            Priority: Minor


This JIRA is for some simple refactors in the NN:
- refactor the code which writes the seen_txid file in NNStorage into a new "LongContainingFile"
utility class. This is useful for the JournalNode to atomically/durably record its last promised
epoch
- refactor the interface from FileJournalManager back to StorageDirectory to use a StorageErrorReport
interface. This allows FileJournalManager to be used in isolation of a full StorageDirectory.

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