CONTROL APPARATUS, STORAGE SYSTEM, AND MEMORY CONTROLLING METHOD
First Claim
1. A control apparatus, coupled to a storage apparatus for storing data therein and an upper apparatus for processing the data, for controlling read-processing of the data stored in the storage apparatus in response to a request from the upper apparatus, said control apparatus comprising:
- a cache memory which stores the data read from the storage apparatus;
an access monitoring unit which monitors a state of access from the upper apparatus to the data stored in the storage apparatus;
a schedule information creating unit which creates schedule information that determines contents to be stored in said cache memory based on the access state monitored by said access monitoring unit; and
a memory controlling unit which controls record-processing of the data from the storage apparatus to said cache memory and removal-processing of the data from said cache memory based on the schedule information.
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Accused Products
Abstract
In order to more efficiently use a cache memory to realize improved response ability in a storage system, there provided are a cache memory which stores the data read from the storage apparatus, an access monitoring unit which monitors a state of access from the upper apparatus to the data stored in the storage apparatus, a schedule information creating unit which creates schedule information that determines contents to be stored in the cache memory based on the access state, and a memory controlling unit which controls record-processing of the data from the storage apparatus to the cache memory and removal-processing of the data from the cache memory based on the schedule information.
13 Citations
20 Claims
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1. A control apparatus, coupled to a storage apparatus for storing data therein and an upper apparatus for processing the data, for controlling read-processing of the data stored in the storage apparatus in response to a request from the upper apparatus, said control apparatus comprising:
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a cache memory which stores the data read from the storage apparatus; an access monitoring unit which monitors a state of access from the upper apparatus to the data stored in the storage apparatus; a schedule information creating unit which creates schedule information that determines contents to be stored in said cache memory based on the access state monitored by said access monitoring unit; and a memory controlling unit which controls record-processing of the data from the storage apparatus to said cache memory and removal-processing of the data from said cache memory based on the schedule information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A storage system, comprising:
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at least one storage apparatus for storing data therein; and a control apparatus for controlling read-processing of the data stored in the storage apparatus in response to a request from an upper apparatus for processing the data, said control apparatus including; a cache memory which stores the data read from the storage apparatus; an access monitoring unit which monitors a state of access from the upper apparatus to the data stored in said storage apparatus; a schedule information creating unit which creates schedule information that determines contents to be stored in the cache memory based on the access state monitored by the access monitoring unit; and a memory controlling unit which controls record-processing of the data from the storage apparatus to the cache memory and removal-processing of the data from the cache memory based on the schedule information. - View Dependent Claims (11, 12, 13)
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14. A memory controlling method for use in control of a cache memory, which stores the data read from the storage apparatus, of a control apparatus, coupled to a storage apparatus for storing data therein and an upper apparatus for processing the data, for controlling read-processing of the data stored in the storage apparatus in response to a request from the upper apparatus, said method comprising the steps of:
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(a) monitoring a state of access from the upper apparatus to the data stored in the storage apparatus; (b) creating schedule information that determines contents to be stored in the cache memory based on the access state monitored in said step (a); and (c) controlling record-processing of the data from the storage apparatus to said cache memory and removal-processing of the data from the cache memory based on the schedule information. - View Dependent Claims (15, 16, 17)
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18. A control apparatus, coupled to a storage apparatus for storing data therein and an upper apparatus for processing the data, for controlling read-processing of the data stored in the storage apparatus in response to a request from the upper apparatus, said control apparatus comprising:
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a cache memory which stores the data read from the storage apparatus; an access monitoring unit which monitors a state of access, in each predetermined time period, from the upper apparatus to the data stored in the storage apparatus; a schedule information creating unit which creates schedule information that determines contents to be stored in said cache memory in each predetermined time period based on the access state monitored by said access monitoring unit; a correcting unit which corrects the schedule information in accordance with the immediately preceding access state before the time period relating to the scheduling information; and a memory controlling unit which controls record-processing of the data from the storage apparatus to said cache memory based on the schedule information corrected by said correcting unit. - View Dependent Claims (19, 20)
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Specification