Using a transient cache list and prolonged cache list to manage tracks in cache based on a demotion hint with a track access request

A system for managing tracks in a storage in a cache, comprising:

• a processor;
• and
• a computer readable storage medium having computer readable program code embodied therein that when executed performs operations, the operations
• staging a track into the cache in response to a request for the track;
• determining whether the request provides a demotion hint;
• indicating the track in a transient cache list in response to determining that the request provides the demotion hint;
• indicating the track in a prolonged cache list in response to determining that the request does not provide the demotion hint;
• and
• demoting the track from the cache in response to the request for the track comprising a read request, returning the track to the read request, and the track is indicated in the transient cache list.

A method for managing tracks in a storage in a cache, comprising:

• staging a track into the cache in response to a request for the track;
• determining whether the request provides a demotion hint;
• indicating the track in a transient cache list in response to determining that the request provides the demotion hint;
• indicating the track in a prolonged cache list in response to determining that the request does not provide the demotion hint;
• and
• demoting the track from the cache in response to the request for the track comprising a read request, returning the track to the read request, and the track is indicated in the transient cache list.