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https://issues.apache.org/jira/browse/HDFS-3077?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13229648#comment-13229648
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Benjamin Reed commented on HDFS-3077:
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just because zookkeeper started in research does not mean that we intended it
to be just a research project. bookkeeper was made specifically to address a
production issue in HDFS. you are going to write a quorum system from scratch.
it's a research project. (it's hard too!) the comparison will be interesting
although you don't have to write any code to see what the problems with the
approaches are. and i agree in the end it will be pretty easy to objectively
choose between the two, so it is useful to be a proof point to reference in the
future.
> Quorum-based protocol for reading and writing edit logs
> -------------------------------------------------------
>
> Key: HDFS-3077
> URL: https://issues.apache.org/jira/browse/HDFS-3077
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: ha, name-node
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
>
> Currently, one of the weak points of the HA design is that it relies on
> shared storage such as an NFS filer for the shared edit log. One alternative
> that has been proposed is to depend on BookKeeper, a ZooKeeper subproject
> which provides a highly available replicated edit log on commodity hardware.
> This JIRA is to implement another alternative, based on a quorum commit
> protocol, integrated more tightly in HDFS and with the requirements driven
> only by HDFS's needs rather than more generic use cases. More details to
> follow.
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