@Private @Evolving

Package org.apache.hadoop.hdfs.server.federation.store.records

Contains the abstract definitions of the state store data records. The state store supports multiple multiple data records.

Data records inherit from a common class BaseRecord. Data records are serialized when written to the data store using a modular serialization implementation. The default is profobuf serialization. Data is stored as rows of records of the same type with each data member in a record representing a column.

Class Summary

Class	Description
BaseRecord	Abstract base of a data record in the StateStore.
DisabledNameservice	Data record indicating a specific name service ID has been disabled and is no longer valid.
MembershipState	Data schema for storing NN registration information in the StateStoreService.
MembershipStats	Data schema for storing NN stats in the StateStoreService.
MountTable	Data schema for MountTableStore data stored in the StateStoreService.
Query<T extends BaseRecord>	Check if a record matches a query.
QueryResult<T extends BaseRecord>	Encapsulates a state store query result that includes a set of records and a time stamp for the result.
RouterState	Entry to log the state of a Router in the StateStoreService.
StateStoreVersion	Entry to track the version of the State Store data stored in the State Store by a Router.