| Package | Description | 
|---|---|
| org.apache.hadoop.hdfs.server.federation.store | The federation state store tracks persistent values that are shared between
 multiple routers. | 
| org.apache.hadoop.hdfs.server.federation.store.driver.impl | Implementations of state store data providers/drivers. | 
| Constructor and Description | 
|---|
| CachedRecordStore(Class<R> clazz,
                 StateStoreDriver driver)Create a new cached record store. | 
| CachedRecordStore(Class<R> clazz,
                 StateStoreDriver driver,
                 boolean over)Create a new cached record store. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | StateStoreBaseImplBase implementation of a State Store driver. | 
| class  | StateStoreFileBaseImplStateStoreDriverimplementation based on files. | 
| class  | StateStoreFileImplStateStoreDriver implementation based on a local file. | 
| class  | StateStoreFileSystemImplStateStoreDriverimplementation based on a filesystem. | 
| class  | StateStoreSerializableImplState Store driver that stores a serialization of the records. | 
| class  | StateStoreZooKeeperImplStateStoreDriverdriver implementation that uses ZooKeeper as a
 backend. | 
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