Electrical computers and digital processing systems: memory – Storage accessing and control – Hierarchical memories
Reexamination Certificate
2004-08-04
2009-06-23
Sough, Hyung S (Department: 2188)
Electrical computers and digital processing systems: memory
Storage accessing and control
Hierarchical memories
C711S118000, C711S120000
Reexamination Certificate
active
07552282
ABSTRACT:
Described are techniques for selective data replication. Cached data is replicated if it is characterized as critical. Critical data may include data associated with a write I/O operation. Cache locations are selected for replicated data so that a first location is mapped to a first memory board and a second location is mapped to a second memory board. Data for a read operation is not replicated in cache. Other non-cache data that is critical and thus replicated includes metadata. Cache locations for data of read and write I/O operations are selected dynamically at the time the I/O operation is made from the same pool of cache locations.
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Bermingham Michael
Chilton Kendell A.
DeCrescenzo Robert
Halstead Mark J.
Kopylovitz Haim
Cygiel Gary W
EMC Corporation
Muirhead and Saturnelli LLC
Sough Hyung S
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