Quorum-based protocol for reading and writing edit logs
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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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