Patent ID: 6792507
Filing Date: 2004-09-14
Classification: G06F

Abstract:
A cache system, comprising:a computer network; two or more cache systems connected to the computer network wherein each cache system is connected to at least one computer host and at least one storage device; each cache system further comprising a storage-side cache (SSC) for servicing data requests for data stored on the storage device associated with the cache system, a host-side cache (HSC) for servicing data requests from computer hosts associated with the cache system and a cache manager for controlling the operation of the first and second caches; and wherein the cache manager further comprises means for performing a read operation on the HSC and means for performing a write operation on the HSC and wherein the write performing means further comprises means for determining a write operation byte limit, means for invalidating the HSC in response to a HSC cache write if the number of bytes in the cache write exceeds the write operation byte limit and means for updating the HSC cache in response to a HSC cache write if the number of bytes in the cache write does not exceed the write operation byte limit.