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https://issues.apache.org/jira/browse/HDFS-3189?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon updated HDFS-3189:
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Attachment: hdfs-3189-prelim.txt
Preliminary patch, there are still a couple TODOs/cleanup to do before this is
committable.
> 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
> Attachments: hdfs-3189-prelim.txt
>
>
> 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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