| Package | Description | 
|---|---|
| org.apache.hadoop.hdfs.server.federation.store.driver.impl | Implementations of state store data providers/drivers. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | StateStoreFileBaseImplStateStoreDriverimplementation based on files. | 
| class  | StateStoreFileImplStateStoreDriver implementation based on a local file. | 
| class  | StateStoreFileSystemImplStateStoreDriverimplementation based on a filesystem. | 
| class  | StateStoreZooKeeperImplStateStoreDriverdriver implementation that uses ZooKeeper as a
 backend. | 
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