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https://issues.apache.org/jira/browse/HDFS-16943?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17698668#comment-17698668
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ASF GitHub Bot commented on HDFS-16943:
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simbadzina commented on PR #5469:
URL: https://github.com/apache/hadoop/pull/5469#issuecomment-1463046244
> orrect, what I meant above by this "StateStoreDrive IA.Public for others
to extend it" is that we can make `StateStoreDrive` as
`@InterfaceAudience.Public` and that way we officially allow other applications
to extend it.
I see. I think that is a good idea. With that change do you think the
MySQLStateStore would still be valuable to the community?
> RBF: Implement MySQL based StateStoreDriver
> -------------------------------------------
>
> Key: HDFS-16943
> URL: https://issues.apache.org/jira/browse/HDFS-16943
> Project: Hadoop HDFS
> Issue Type: Task
> Components: hdfs, rbf
> Reporter: Simbarashe Dzinamarira
> Assignee: Simbarashe Dzinamarira
> Priority: Major
> Labels: pull-request-available
>
> RBF supports two types of StateStoreDrivers
> # StateStoreFileImpl
> # StateStoreZooKeeperImpl
> I propose implementing a third driver that is backed by MySQL.
> * StateStoreZooKeeperImpl requires an additional Zookeeper cluster.
> * StateStoreFileImpl can use one of the namenodes in the HDFS cluster, but
> that namenode becomes a single point of failure, introducing coupling between
> the federated clusters.
> HADOOP-18535 implemented a MySQL token store. When tokens are stored in
> MySQL, using MySQL for the StateStore as well reduces the number of external
> dependencies for routers.
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