Inventors:
Jorge Rodriguez - Cary NC, US
James Stephens - Raleigh NC, US
Assignee:
International Business Machines Corporation - Armonk NY
International Classification:
G06F012/12
Abstract:
A method that avoids cache flooding when handling sequential I/O request streams in storage subsystem caches. Both on-demand and prefetched data are addressed. A mechanism is provided that makes the blocks read from the disk array, that are part of a sequential I/O request stream, minimize the evictions of potentially useful data blocks from the cache, thus avoiding the flooding of the cache by stale data.