Patent ID: 9519549
Filing Date: 2016-12-13
CPC Classification: G06F

Claim Text:
1. A method for backing up data in a data storage system comprising primary data storage, cache, and backup data storage, the method comprising steps of: identifying, in a list, portions of data stored in the primary data storage for backup to the backup data storage, the portions of data comprising subsets of data; prefetching downward from the primary data storage the portions of data identified in the list; caching the prefetched portions of data identified in the list in the cache; backing up the prefetched portions of data identified in the list from the cache to the backup data storage; and from the list, upon backup of each of the prefetched portions of data identified in the list from the cache to the backup data storage, marking each backed up portion of the prefetched portions of data identified in the list for accelerated Least Recently Used (LRU) discard from the cache;