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From "Todd Lipcon (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3189) Add preliminary QJournalProtocol interface, translators
Date Tue, 03 Apr 2012 20:56:25 GMT
Add preliminary QJournalProtocol interface, translators

                 Key: HDFS-3189
                 URL: https://issues.apache.org/jira/browse/HDFS-3189
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: ha
    Affects Versions: 2.0.0
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon

This JIRA is to add the preliminary code for the QJournalProtocol. This protocol differs from
JournalProtocol in the following ways:
- each call has context information indicating the epoch number of the requester
- it contains calls that are specific to epoch number generation, etc, which do not apply
to other journaling daemons such as the BackupNode

My guess is that, at some point, we can merge back down to one protocol, but during the initial
implementation phase, it will be useful to have a distinct protocol for this project.

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