@Private @Unstable

Package org.apache.hadoop.hdfs.server.namenode.sps

This package provides a mechanism for satisfying the storage policy of a path.

Interface Summary

Interface	Description
BlockMovementListener	Interface for notifying about block movement attempt completion.
BlockMoveTaskHandler	Interface for implementing different ways of block moving approaches.
Context	An interface for the communication between SPS and Namenode module.
FileCollector	An interface for scanning the directory recursively and collect files under the given directory.
SPSService	An interface for SPSService, which exposes life cycle and processing APIs.

Class Summary

Class	Description
BlockStorageMovementAttemptedItems	A monitor class for checking whether block storage movements attempt completed or not.
BlockStorageMovementNeeded	A Class to track the block collection IDs (Inode's ID) for which physical storage movement needed as per the Namespace and StorageReports from DN.
BlockStorageMovementNeeded.DirPendingWorkInfo	Info for directory recursive scan.
DatanodeCacheManager	The Datanode cache Manager handles caching of DatanodeStorageReport.
ItemInfo	ItemInfo is a file info object for which need to satisfy the policy.
StoragePolicySatisfier	Setting storagePolicy on a file after the file write will only update the new storage policy type in Namespace, but physical block storage movement will not happen until user runs "Mover Tool" explicitly for such files.
StoragePolicySatisfier.AttemptedItemInfo	This class contains information of an attempted blocks and its last attempted or reported time stamp.
StoragePolicySatisfier.DatanodeMap	Maintains storage type map with the available datanodes in the cluster.
StoragePolicySatisfier.DatanodeWithStorage	Keeps datanode with its respective set of supported storage types.
StoragePolicySatisfyManager	This manages satisfy storage policy invoked path ids and expose methods to process these path ids.