INFORMATION PROCESSING APPARATUS AND CACHE CONTROL METHOD
First Claim
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1. An information processing apparatus configured to accept an I/O request from a host computer, comprising:
- a plurality types of cache memories having different characteristics; and
a control device, which is coupled to the plurality types of cache memories,wherein the control device;
caches, according to an access characteristic of data associated with the I/O request, the data in any one of the multiple type of the cache memories.
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Abstract
An information processing apparatus comprises a plurality types of cache memories having different characteristics, decides on a type of cache memory to be used as a data cache destination based on the access characteristics of cache-target data, and caches the data in the cache memory of the decided type.
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Citations
19 Claims
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1. An information processing apparatus configured to accept an I/O request from a host computer, comprising:
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a plurality types of cache memories having different characteristics; and a control device, which is coupled to the plurality types of cache memories, wherein the control device; caches, according to an access characteristic of data associated with the I/O request, the data in any one of the multiple type of the cache memories. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An information processing apparatus configured to accept an I/O request from a host computer, comprising:
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a first cache memory which is composed of a RAM and has multiple segments; a second cache memory which is composed of a nonvolatile memory and has multiple segments; a control device, which is coupled to the first cache memory and the second cache memory, manages a cache directory comprising multiple entries; wherein; each entry has a correspondence relationship between a logical address of cached data and information related to a storage location in which the data is cached; the information related to the storage location is information specifying a segment in the first cache memory in which the data is stored in a case where the data is cached in the first cache memory; and the information related to the storage location is information specifying a segment in the second cache memory in which the data is stored in a case where the data is cached in the second cache memory. - View Dependent Claims (14, 15, 16)
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17. A cache control method, comprising:
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accepting, an I/O request from a host computer; and caching, according to an access characteristic of data associated with the I/O request, the data in any one of multiple cache memories having different characteristics. - View Dependent Claims (18, 19)
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Specification