Systems and methods for cache synchronization between...

Details Systems and methods for cache synchronization between... Systems and methods for cache synchronization between...

2006-10-03

2006-10-03

Moazzami, Nasser (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

C711S127000, C711S143000, C710S053000

Reexamination Certificate

active

07117310

ABSTRACT:
Systems and methods for maintaining cache coherency between a first controller and a redundant peer controller while reducing communication overhead processing involved in the coherency message exchange. Header or meta-data information is accumulated in a buffer in a first controller along with updated cache data (if any) and forwarded to the peer controller. The accumulating information may be double buffered so that a buffer is filling as a previously filled buffer is transmitting to the peer controller. The peer controller processes the received information to update its mirror cache to maintain coherency with the first controller's cache memory with respect to dirty data. The method and systems avoid the need to update cache coherency in response to every flush operation performed within the first controller to thereby improve overall system performance.

REFERENCES:
patent: 5559952 (1996-09-01), Fujimoto
patent: 6247099 (2001-06-01), Skazinski et al.
patent: 6912669 (2005-06-01), Hauck et al.

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