International Business Machines Corporation
INTEGRATION OF APPLICATION INDICATED MAXIMUM TIME TO CACHE FOR A TWO-TIERED CACHE MANAGEMENT MECHANISM

Abstract:

An indication of a maximum retention time in a cache comprising a first type of memory and a second type of memory for a first plurality of tracks is received from a host application, wherein no maximum retention time is indicated for a second plurality of tracks. In response to demoting a track of the first plurality of tracks from the first type of memory to the second type of memory, an adjustment of a first amount of time that the track is allowed to be retained in the second type of memory is based on a second amount of time the track has already been present in the first type of memory prior to being demoted from the first type of memory to the second type of memory.