JPH03220620A - Optical disk system - Google Patents

Abstract

PURPOSE:To increase the overall processing speed by changing the processing order of respective data retrieval requirements held in a queuing table means so that processings are continuously performed in a corresponding optical disk drive unit in accordance with data retrieval requirements detected by a detecting means. CONSTITUTION:When a queue of data retrieval requests are generated in a queuing table means 5 during the use of each optical disk driving unit 2, the detecting means in a centralized optical disk controller 3 detects data retrieval requirements to the optical disk loaded to each optical disk driving unit 2 among the queue of data retrieval requirements. A processing order changing means changes the processing order of data retrieval requirements held in the queuing table means 5 so that processings corresponding to detected data retrieval requirements are continuously performed in the corresponding optical disk driving unit 2. Thus, the overall processing speed at the time of the generation of the queue of data retrieval requirements is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an optical disc system for storing and managing information such as drawings and documents using an optical disc as a recording medium.

(Prior Art) In recent years, optical disk systems have been widely put into practical use that store information such as drawings and documents on optical disks and enable high-speed data searches on the optical disks.

This optical disc system consists of an optical disc storage shelf that stores multiple optical discs, and multiple (usually two) units that load optical discs extracted from the optical disc storage shelf in response to data search requests and access data on these optical discs. The optical disc drive unit includes an optical disc drive unit and a centralized optical disc control device that centrally controls each optical disc drive unit. In this system, it is possible to simultaneously load optical discs into two optical disc drive units and search for data.

Incidentally, in any case, data searches in such an optical disk system are performed in the reverse order in which data search requests are generated. Therefore, if requests for the same optical disc are scattered in the queue of pig search requests, loading and unloading of the same optical disc will be repeated many times, resulting in wasted time. Incidentally, each loading and unloading of an optical disk takes approximately several tens of seconds.

(Problems to be Solved by the Invention) The present invention is intended to solve such problems, and is aimed at solving the problems described above. An object of the present invention is to provide an optical disc system that can improve the overall processing speed when a queue of data search requests occurs by preventing the replacement of data search requests.

[Configuration of the Invention (Means for Solving the Problems) In order to achieve the above object, the optical disc system of the present invention includes an optical disc storage unit that stores a plurality of optical discs;
A plurality of optical disk drive units that load an optical disk extracted from an optical disk storage section in response to a data search request and read data from the optical disk; a holding matrix table means that holds a holding matrix of data searching requests; and each optical disk drive unit. detecting means for detecting a data search request for an optical disk loaded in each optical disk drive unit from among the data search request queue when a queue of data search requests is generated in the queue table means during use of the optical disc drive unit; processing order changing means for changing the processing order of each data search request held in the holding matrix table means so that the processing corresponding to the data search request detected by this means is performed continuously in the corresponding optical disk drive unit; It is equipped with

(Function) In the optical disc system of the present invention, when a queue of data search requests occurs in the queue table means while each optical disc drive unit is in use, the detection means
A data search request for an optical disk loaded in each optical disk drive unit is detected from a queue of data search requests. Further, the processing order changing means changes the processing order of each data search request held in the holding matrix table means so that the processing corresponding to the data search request detected by the detection means is performed consecutively in the corresponding optical disk drive unit. change.

Therefore, according to the present invention, it is possible to prevent wasteful replacement of optical discs when data search requests for the same optical disk are scattered in the data search request queue, and It is possible to improve the overall processing speed when this occurs.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram for explaining the configuration of an optical disc system according to an embodiment of the present invention.

In the figure, reference numeral 1 denotes an optical disk storage shelf storing a plurality of optical disks, and 2 an optical disk extracted from the optical disk storage shelf 1 by an optical disk reloading device (not shown) in response to a data search request. 3 is a centralized optical disk control device that performs overall control of each optical disk drive unit 2; 4 is a disk drive program used to control each optical disk drive unit 2 in the centralized optical disk control device 3; , 5 is a holding matrix table that holds the holding matrix of pig search requests transferred from the host device 6 in the order of occurrence, and 7 is an optimization by changing the processing order of the holding matrix of data search requests held in the holding matrix table 4. This is an optimization program for

Next, the operation of this optical disc system will be explained using the flowchart shown in FIG.

When the centralized optical disk control device 3 learns that a plurality of data search requests are transferred simultaneously or almost simultaneously from the host device 6 and a queue of data search requests is generated in the queue table 5 (step A), first The optical disc control device 3 determines whether there is currently an empty (no optical disc loaded) optical disc drive unit 2 (step B).

If it is determined here that there is a vacant optical disk drive unit 2, the centralized optical disk control device 3 operates according to the disk drive program 4 as usual.
A data search request is read from the holding queue table 5 in a first-in, first-out manner, a corresponding optical disk is extracted from the optical disk storage shelf 1, it is loaded into the vacant optical disk drive unit 2, and data search is started. After the pig search is completed, the optical disc is taken out from the optical disc drive unit 2 and returned to the optical disc storage shelf 1 (step C).

In addition, if an empty optical disk drive unit 2 is not detected, the centralized optical disk control device 3 sends a data search request to be read next from the holding matrix table 5, or a search request for data to be read next from the holding matrix table 5, or a request for retrieval of data to be read next from the holding matrix table 5, or a request for retrieval of data to be read next from the holding matrix table 5, or a request for retrieval of data to be read next from the holding matrix table 5, or a request for retrieval of data to be read next from the holding matrix table 5, or a request for retrieval of data to be read next from the holding matrix table 5, It is determined whether the cabinet names match (step D).

If it is determined that they match, the optical disk drive unit 2 loaded with the optical disk continuously searches for data in accordance with the next data search request without intervening the operation of changing the optical disk (step E).

In addition, if it is determined that the next data search request does not match any of the optical disks loaded in each optical disk drive unit 2, the centralized optical disk control device 3 executes the process in accordance with the optimization program 7 to update the holding matrix table 5.
In the process, it is checked whether there is a data search request for the optical disc currently loaded in the optical disc drive unit 2 (step F).

If this data search request does not exist in the holding matrix table 5, the optical disk is replaced as usual, the data searching request is read out from the holding queue table 5 in a first-in, first-out manner, and the data is searched (step C).

Furthermore, if this data search request exists in the holding matrix table 5, each data stored in the holding matrix table 5 is The processing order of data search requests is changed (step G).

After that, processing in response to a data search request for the optical disc loaded in the optical disc drive unit 2 is performed.
This is performed continuously in the corresponding optical disk drive unit 2 (step E).

Thus, according to the optical disc system of this embodiment, when a plurality of data search requests occur simultaneously or almost simultaneously and a queue of data search requests is created in the queue table 5, the centralized optical disc control device 3 Regardless of the order in which the search requests are generated, the processing order of each data search request is changed so that data search requests for the optical disks currently loaded in each optical disk drive unit 2 are sequentially processed with priority.

Therefore, in the case where data search requests for the same optical disk are dispersed in the holding matrix table 5, wasteful replacement of optical disks is not performed, and the overall processing speed can be improved.

[Effects of the Invention] As explained above, according to the optical disk system of the present invention, unnecessary replacement of optical disks can be prevented when data search requests for the same optical disk are scattered in a queue of data search requests. This makes it possible to improve the overall processing speed when a queue of data search requests occurs.

[Brief explanation of drawings]

0 FIG. 1 is a block diagram for explaining the configuration of an optical disc system according to an embodiment of the present invention, and FIG. 2 is a flowchart for explaining the operation of the optical disc system of FIG. 1. DESCRIPTION OF SYMBOLS 1... Optical disc storage shelf, 2... Optical disc drive unit, 3... Centralized optical disc control device, 4...
. . . Disk drive program, 5. Portion matrix table, 6. Upper device, 7. Optimization program.

Claims (1)

[Scope of Claims] An optical disc storage unit that stores a plurality of optical discs; a plurality of optical disc drive units that load optical discs extracted from the optical disc storage unit in response to a data search request and read data from the optical discs; holding matrix table means for holding a holding matrix of data search requests; and when a holding queue of data search requests is generated in the holding queue table means during use of each of the optical disk drive units; a detecting means for detecting a data search request for an optical disk loaded in each optical disk drive unit; and a detecting means for detecting a data search request for an optical disk loaded in each optical disk drive unit; 1. An optical disc system comprising processing order changing means for changing the processing order of each data search request held in the holding matrix table means.