Storage device adapter equipped with integrated cache

Details Storage device adapter equipped with integrated cache Storage device adapter equipped with integrated cache

2006-06-13

2006-06-13

Padmanabhan, Mano (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

C711S113000, C711S118000, C711S137000, C711S141000

Reexamination Certificate

active

07062608

ABSTRACT:
When streaming data is sent to a client, server capabilities are restricted by the ability to retrieve data from a storage unit, the data transfer rate drops and processing time increases. A device adapter that connects a host and a storage includes a cache controller, a cache interface that accesses a cache device and a storage interface that accesses the storage. With the cache controller, data retrieved from the storage can be stored in a cache without the awareness of a host computer. The cache controller includes a cache directory that manages storage region allocation of the cache and a monitor that maintains load and performance information of the storage and the cache. The storage and the cache are appropriately used not only depending on the presence of requested data inside the cache but also depending on the present load and performance of the storage.

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