US Patent:
20090193195, Jul 30, 2009
Inventors:
Robert A. Cochran - Sacramento CA, US
Erik A. Lipps - Sacramento CA, US
Charles A. Paridon - Cameron Park CA, US
International Classification:
G06F 12/08
G06F 12/16
G06F 12/00
US Classification:
711133, 711162, 711E12001, 711E12022, 711E12103
Abstract:
Data items are stored in a cache of the storage system, where the data items are for a snapshot volume. Sticky indicators are associated with the data items in the cache, where the sticky indicators delay removal of corresponding data items from the cache. Data items of the cache are sacrificed according to a replacement algorithm that takes into account the sticky indicators associated with the data items.