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Storage device adapter equipped with integrated cache

  • US 20050108473A1
  • Filed: 02/20/2004
  • Published: 05/19/2005
  • Est. Priority Date: 11/13/2003
  • Status: Active Grant
First Claim
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1. A device adapter that interconnects a host computer and a main storage, the device adapter including a cache storage interface device for accessing a cache storage, a main storage interface device for accessing the main storage via a network, and a cache controller that processes a data output request made by the host computer, the cache controller including:

  • a processing unit that caches, in the cache storage, data retrieved from the main storage;

    a processing unit that manages use and allocation of storage regions of the cache storage;

    a processing unit that manages load and performance information relating to the main storage and the cache storage;

    a processing unit that determines whether or not the requested data is cached; and

    a processing unit that determines, when the requested data is cached, which of the cache storage and the main storage to use as the storage from which the requested data will be retrieved.

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