SNAPSHOTTING OF A PERFORMANCE STORAGE SYSTEM IN A SYSTEM FOR PERFORMANCE IMPROVEMENT OF A CAPACITY OPTIMIZED STORAGE SYSTEM

摘要

A system for storing data comprises a performance storage system for storing one or more data items. A data item of the one or more data items comprises a data file or a data block. The system further comprises a segment storage system for storing a snapshot of a stored data item of the one or more data items in the performance storage system. The taking of the snapshot of the stored data item enables recall of the stored data item as stored at the time of the snapshot. At least one newly written segment is stored as a reference to a previously stored segment.