Data processing system using an optical disc apparatus
AssigneeKabushiki Kaisha Toshiba
InventorShiro Takagi
Life of this patent
Estimating the term…
Abstract
In a disc apparatus, past access records concerning data items stored in the optical disc apparatus and exchange records of optical discs are managed, and access frequencies in the future are estimated on the basis of these records. Data items estimated to be accessed at a high frequency are stored into a cash HDD as a high-speed device, and data items estimated to be accessed at a middle frequency are collected into a specific optical disc. This specific optical disc is continuously installed in an optical disc drive. As a result, the response ability of the apparatus is greatly improved.
Claims14
A data processing system comprising:
- a memory access device for accessing data in a memory;
- a data processing device for accessing data in a first portable medium and a second portable medium, at a lower data access processing speed than the memory access device;
- estimation means for estimating an access frequency at which data is accessed;
- first processing means for storing data which is estimated to be accessed at a high access frequency, in the memory on a basis of an access frequency estimated by the estimation means;
- second processing means for storing data which is estimated to be accessed at a middle access frequency in the first portable medium, on a basis of an access frequency estimated by the estimation means;
- third processing means for storing data which is estimated to be accessed at a low access frequency in the second portable medium, on a basis of an access frequency estimated by the estimation means;
- and
- management means for managing the first portable medium on which the data is estimated to be accessed at the middle access frequency is stored, so as to be continuously inserted in the data processing device.
A data processing system comprising:
- a memory access device for accessing data in a memory;
- a data processing device for accessing data in a first portable medium and a second portable medium, at a lower data access processing speed than the memory access device;
- estimation means for estimating an access frequency at which data stored in the memory is accessed, when an amount of data stored in the memory exceeds a predetermined amount;
- first processing means for storing data which is estimated to be accessed at a middle frequency on the first portable medium, on a basis of the access frequency of the data item estimated by the estimation means;
- second processing means for storing data which is estimated to be accessed at a low access frequency on the second portable medium, on a basis of the access frequency estimated by the estimation means;
- and
- managing means for managing the first portable medium on which the data estimated to be accessed at the middle access frequency is stored so as to be continuously inserted in the data processing device.
A method for estimating a data access frequency, the method comprising the steps of:
- a first storing step for storing an exchange record of a plurality of portable media;
- a second storing step for storing an access frequency of data stored in the portable media;
- a first estimating step for estimating an exchange time on a basis of an exchange record of the portable media:
- a second estimating step for estimating a next access time on a basis of the access frequency of the data item stored in the portable media;
- a comparing step for comparing the estimated exchange time of the portable media with the estimated next access time point of a data item;
- and
- a determining step for determining that the data item is a low frequency data item if the estimated next access time of the data item is after the estimated exchange time of the portable media.
A data processing method, for use in a system comprising a memory access device for accessing data in a memory and a data processing device for accessing data on a first portable medium and a second portable medium, at a lower data access processing speed than the memory access device, the data processing method comprising the steps of:
- estimating an access frequency at which data stored in the memory is accessed when an amount of data stored in the memory exceeds a predetermined amount;
- a first storing step for storing data which is estimated to be accessed at a middle access frequency into the first portable medium, on a basis of the access frequency estimated by the estimation step;
- a second storing step for storing data which is estimated to be accessed at a low access frequency into the second portable medium, on a basis of the estimated access frequency;
- and
- continuously inserting the first portable medium on which the data item is estimated to be accessed at the middle access frequency into the data processing device.
Dependencies are inferred from the claim text.