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Posted to hdfs-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2012/06/27 04:50:44 UTC
[jira] [Resolved] (HDFS-3189) Add preliminary QJournalProtocol
interface, translators
[ https://issues.apache.org/jira/browse/HDFS-3189?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Todd Lipcon resolved HDFS-3189.
-------------------------------
Resolution: Incomplete
i ended up doing this as part of a larger patch on HDFS-3077
> 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-alpha
> 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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