JPH04361371A - Image data retrieval system - Google Patents

Abstract

PURPOSE:To improve the retrieval efficiency of the system at the image data retrieval system to retrieve image data stored in an assembled type optical disk device. CONSTITUTION:This system is composed of an assembled type optical disk device 1 storing the image data, auxiliary storage device 2 storing file management data having areas for a file name, write area information, image data name and retrieval time or the like, controller 3 to which these assembled type optical disk device 1 and auxiliary storage device 2 are connected, and retrieval device 4 connected through a local area network 5 to this controller 3. When there is no empty area in the auxiliary storage device 2, deletion is started from the image data at the earlist final retrieval time.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image data retrieval system, and more particularly to a retrieval system for image data stored in a collective optical disk device.

0002

[Prior Art] Conventionally, in this type of image data retrieval system, when the amount of image data stored in an auxiliary storage device increases and there is no more space for writing, old image data is erased in the order in which it was written, and new image data is I was writing image data.

0003

[Problems to be Solved by the Invention] In the conventional image data retrieval system described above, image data is erased in the order in which it was written to the auxiliary storage device, so that the image data that is newer at the last search time is erased from the image data that is older at the last search time. It has the same probability of being erased as image data. Therefore, connect the auxiliary storage device,
There has been a problem in that the effect of reducing the number of replacements of optical disk media in a collective optical disk device is lost.

0004

[Means for Solving the Problems] In order to solve the above-mentioned problems, the image data retrieval system of the present invention adds a search time to the file management data of the auxiliary storage device, so that the auxiliary storage device runs out of free space. In this case, the oldest image data at the last search time is deleted, and the newest image data at the last search time is left.

[0005]

[Operation] The present invention improves the search efficiency of the system by sequentially erasing image data starting from the oldest search time.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of an image data retrieval system according to the present invention. In the same figure, 1
2 is an auxiliary storage device having file management data shown in FIG. 2; 3 is a collective optical disk device that stores image data;
4 is a control device connected to the collective optical disk device 1 and the auxiliary storage device 2, and 4 is a search device connected to the control device 3 via the local area network 5. In the file management data shown in FIG. 2, 6 is a file name, 7 is write area information, 8 is an image data name, and 9 is a search time.

Next, the operation of the image data retrieval system having the above configuration will be explained. First, when there is a read request from the search device 4, the control device 3 reads the requested image data from the collective optical disk device 1, transfers it to the search device 4 via the local area network 5, and
It is written to the auxiliary storage device 2, and the time at that time is set in the search time 9 of the file management data.

Next, when there is a request to read the same image data from the search device 4, the control device 1 reads the image data from the auxiliary storage device 2 because the requested image data has already been written to the auxiliary storage device 2. , and transfers it to the search device 4, and updates the search time of the file management data.

If the above operation is repeated and the auxiliary storage device 2 runs out of free space, the search time of the file management data is referenced, the image data with the oldest search time is deleted in order, and new image data is written. It is something that Note that although the above description has been made regarding the operation when there is one search device, it goes without saying that the same operation can be performed when there are two or more search devices.

0010

[Effects of the Invention] As explained above, the image data retrieval system of the present invention adds the search time to the file management data of the auxiliary storage device, and when free space runs out, deletes image data starting from the oldest search time. This has the effect that the more recent the image data is at the search time, the less frequently the optical disk medium of the collective optical disk device must be replaced, and the search efficiency of the system is greatly improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of an image data search system of the present invention.

FIG. 2 is a diagram showing a detailed configuration of file management data of the auxiliary storage device in FIG. 1;

[Explanation of symbols]

1 Collective optical disk device 2 Auxiliary storage device 3 Control device 4 Search device 5. Local area network 6 File name 7 Write area information 8 Image data name 9 Search time

Claims (1)

[Claims] Claim 1: A first set of image data from a collective optical disk device in which image data is stored, an auxiliary storage device connected to a control device of the collective optical disk device, and a search device.
When the second read request is made, the image data read from the collective optical disk device is written to the auxiliary storage device,
For the second and subsequent requests, the image data retrieval system that reads from this auxiliary storage device sets up an area in the file management data of this auxiliary storage device to write the search time of the image data, and when there is no free space in the auxiliary storage device. An image data retrieval system characterized in that when the image data is deleted, the image data with the oldest last search time is deleted.