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https://issues.apache.org/jira/browse/HDFS-16943?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17708115#comment-17708115
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ASF GitHub Bot commented on HDFS-16943:
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simbadzina commented on code in PR #5469:
URL: https://github.com/apache/hadoop/pull/5469#discussion_r1156449098
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hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/driver/impl/StateStoreBaseImpl.java:
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@@ -39,6 +40,7 @@
* optimization, such as custom get/put/remove queries, depending on the
* capabilities of the data store.
*/
[email protected]
public abstract class StateStoreBaseImpl extends StateStoreDriver {
Review Comment:
Fixed.
> 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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