Package org.apache.hadoop.hdfs.server.federation.store.driver.impl

@Private @Evolving package org.apache.hadoop.hdfs.server.federation.store.driver.impl

Implementations of state store data providers/drivers. Each driver is responsible for maintaining, querying, updating and deleting persistent data records. Data records are defined as subclasses of BaseRecord. Each driver implements the StateStoreDriver interface.

Currently supported drivers:

• StateStoreFileImpl A file-based data storage backend.
• StateStoreZooKeeperImpl A zookeeper based data storage backend.

Related Packages

Package	Description
org.apache.hadoop.hdfs.server.federation.store.driver	The state store uses modular data storage classes derived from StateStoreDriver to handle querying, updating and deleting data records.

Classes

Class	Description
StateStoreBaseImpl	Base implementation of a State Store driver.
StateStoreFileBaseImpl	StateStoreDriver implementation based on files.
StateStoreFileImpl	StateStoreDriver implementation based on a local file.
StateStoreFileSystemImpl	StateStoreDriver implementation based on a filesystem.
StateStoreMySQLImpl	StateStoreDriver implementation based on MySQL.
StateStoreSerializableImpl	State Store driver that stores a serialization of the records.
StateStoreSerializerPBImpl	Protobuf implementation of the State Store serializer.
StateStoreZooKeeperImpl	StateStoreDriver driver implementation that uses ZooKeeper as a backend.