JP2765553B2 - Multi volume control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a multi-volume control system in a data processing device to which a plurality of collective storage devices are connected.

[0002]

2. Description of the Related Art A medium storage unit in which a plurality of storage media are stored is provided, and data is input and output by loading the storage medium stored in the medium storage unit into an input / output device without intervention of a system operator. Conventionally, various systems using the collective storage device have been proposed. However, in the conventionally proposed technology, input / output processing to and from a storage medium is performed by a collective storage device in which the storage medium is stored. This is performed using only the input / output device in the device (for example, Japanese Patent Laid-Open No. Hei 4-217040).
JP-A-5-258536, etc.).

[0003]

By the way, in a system for performing data processing using a collective storage device, a plurality of collective storage devices are connected to a data processing device, and a plurality of collective storage devices are connected. There is also a system that performs data processing by utilizing the data.

If a conventional technique of performing input / output processing on a storage medium using only an input / output device in a collective storage device in which the storage medium is stored is applied to such a system, there is a certain problem. When data I / O requests are concentrated on storage media stored in a specific collective storage device and there are no free I / O devices in the specific collective storage device, Even if the input / output device is empty, there is a problem that the business is delayed due to the shortage of the input / output device in the specific collective storage device. Especially,
When a plurality of storage media constituting a multi-volume are stored intensively in one collective storage device, input / output processing in the collective storage device is performed by a task of performing data input / output processing using the multi-volume. Since the output device is occupied for a long time, the number of input / output devices in the collective storage device tends to be insufficient, and as a result, data input / output processing using the storage medium stored in the collective storage device is performed. Is more likely to occur.

[0005] Therefore, an object of the present invention is to provide a system in which, when data input / output requests are concentrated in a certain storage device and the number of input / output devices in the storage device becomes insufficient, the other storage device is used. The processing that can be performed is performed by using another collective storage device, so that the use frequency of each collective storage device is made uniform, and the input / output devices in each collective storage device are effectively used. It is an object of the present invention to provide a multi-volume control method.

[0006]

In order to achieve the above object, the present invention provides a medium storage unit storing a plurality of storage media,
An input / output device for inputting / outputting data to / from a storage medium, and a storage medium stored in the medium storage unit being loaded into the input / output device, and a storage medium loaded into the input / output device being stored in the medium. In a multi-volume control method in a data processing device in which a plurality of storage devices each having a medium transport means for storing the storage medium are connected, a multi-volume having the storage medium as a component is uniquely identified. A multi-volume information registration unit in which multi-volume information including a medium group name, a sequence number indicating a processing order of the storage medium in the multi-volume, and a storage position of the storage medium is registered; Among the storage media stored in each of the collective storage devices, the outputable medium information including the storage position of the outputable medium in a state usable for data output processing is included. The output-capable medium information registration unit to be recorded, and the multi-volume information registration unit searching for multi-volume information managed by the same medium group name as the medium group name included in the data input / output request for the multi-volume Processing medium searching means, and based on the multi-volume information searched by the processing medium searching means, the first of the storage media constituting the multi-volume requested to input / output data by the data input / output request. A collective storage device in which a storage medium to be processed is stored is obtained, and the storage medium to be processed first is loaded into the input / output device by controlling the medium transport means in the obtained collective storage device, and thereafter, An input / output device allocating means for outputting allocation information indicating an input / output device loaded with the storage medium; and an input / output device indicated by the allocation information. A data input / output process for performing data input / output processing on the loaded storage medium in accordance with the data input / output request, and thereafter determining whether or not processing for a subsequent medium is necessary; and Means for determining a storage medium to be a subsequent medium when it is determined that processing on the subsequent medium is necessary, and determining an input / output device to which the subsequent medium is assigned, wherein the data input / output request requests data output. And a reserved medium designated to be processed next by the sequence number of the multi-volume information registered in the multi-volume information registration unit, and a processing order that is one step ahead of the reserved medium. When the storage medium is stored in the same collective storage device, there is a request waiting for the input / output device of the collective storage device to become available. It is checked whether or not there is, and if there is no such medium, the reserved medium is set as the subsequent medium, and the subsequent medium is allocated to a free input / output device in the collective storage device in which the storage medium as the subsequent medium is stored. In such a case, the output-capable medium stored in the collective storage device other than the collective storage device storing the reserved medium is preferentially used as the subsequent medium, and the collective type storage medium storing the succeeding medium is stored. A succeeding medium search means for allocating the succeeding medium to an empty input / output device in the storage device, and a medium transport means in the collective storage device storing the storage medium designated as the succeeding medium by the succeeding medium search means. Loading the subsequent medium into the input / output device assigned by the subsequent medium search unit, and then outputting the allocation information indicating the input / output device loaded with the subsequent medium. And e means if, and to the subsequent medium one of the output medium represented by the output medium information registered in the output medium information registration unit,
Medium management information updating means for updating the multi-volume information stored in the multi-volume information registration section and the outputable medium information stored in the outputable medium information section.

In the present invention, in order to make the frequency of use of each collective storage device more uniform and to make more efficient use of the input / output device of each collective storage device, the succeeding medium search means comprises When the data input / output request is for requesting data output, and the reserved medium and a storage medium whose processing order is one before the reserved medium are stored in different collective storage devices, Among the reserved media or the output-capable media, those stored in the collective storage device having an empty input / output device are preferentially used as the subsequent media, and the collective media in which the storage media as the subsequent media are stored A configuration is provided in which the subsequent medium is allocated to a free input / output device in the storage device.

In the above-mentioned configuration, when the subsequent medium is a data output process, the subsequent medium searching means includes a set-type storage device in which the reserved medium and the storage medium whose processing order is one before are the same. If the request is waiting for the input / output device of the collective storage device to become available, and if not, the reserved medium is set as the succeeding medium. Priority is given to an outputable medium stored in a collective storage device other than the collective storage device storing the reserved medium as a subsequent medium.
Further, when the reserved medium and the storage medium whose processing order is one before are stored in different collective storage devices, the subsequent medium searching means may determine whether the reserved medium or the output-capable medium has a free space. The medium stored in the collective storage device in which the output device exists is preferentially set as the subsequent medium.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, which comprises a data processing device 1, a medium registration device 2, and three collective storage devices 31, 32, and 33.

The data processing device 1 includes a processing medium search means 5
An input / output device allocating unit 6, a data input / output unit 7,
It comprises a succeeding medium search means 8, a medium changeover means 9, and a medium management information updating means 10.

The collective storage devices 31, 32, and 33 are medium storage units 31-1 and 31-1 each storing a plurality of storage media.
32-1 and 33-1 and medium transport means 31-2 and 32-
2, 33-2 and a plurality of input / output devices 31-31 to 31-31.
3n, 32-31 to 32-3n, 33-31 to 33-3
n. Medium storage units 31-1, 32-1, and 3
Storage numbers 31-A to 31-Z and 32-A to 3-1
At the positions indicated by 32-Z, 33-A to 33-Z, medium names 31-a to 31-z, 32-a to 32-z, 33-
The storage media a to 33-z are stored.

FIG. 2 shows a multi-volume information registration unit 21 for registering multi-volume information for managing a multi-volume group constituted by storage media stored in the collective storage devices 31, 32, 33, and a data output process. FIG. 4 is a diagram showing an example of the contents of an outputable medium information registration unit 22 in which outputable medium information for managing a storage medium in a usable state is registered.

The multi-volume information registration section 21 has a medium name for uniquely identifying a storage medium stored in the collective storage devices 31, 32, 33, a medium storage section number indicating the storage position of the storage medium, and A storage number, a medium group name for uniquely identifying the multi-volume, and an order number for ordering each storage medium in the multi-volume are registered.
In the example of FIG. 2, the multi-volume having the medium group name 31-a is composed of the storage media having the medium names 31-a and 31-z, and the multi-volume having the medium group name 32-a is having the medium name 32.
-A, 33-a.

The outputable medium information registration unit 22 registers a medium name, a medium storage unit number, and a storage number of a storage medium that can be used in data output processing.

FIG. 3 is a flow chart showing an example of the overall processing of the data processing apparatus 1, and FIGS. 4 and 5 are flow charts showing an example of the processing of the succeeding medium searching means 8. Referring to FIGS. Will be described.

Now, assume that job A outputs a data input / output request including the medium group name 31-a in order to perform data input / output processing for the multi-volume having the medium group name 31-a.

When the data processing device 1 receives a data input / output request from the job A, it passes control to the processing medium search means 5.

The processing medium search means 5 searches the multi-volume information registration section 21 shown in FIG. 2 and finds the same medium group name as the medium group name 31-a included in the data input / output request from the job A. Multi-volume information 21A, 21B
Then, control is passed to the input / output device assigning means 6 (FIG. 3, S1).

The input / output device allocating means 6 stores the multi-volume information 21A,
The storage medium 31-a to be processed first is obtained based on the sequence number in the storage medium 21B, and the input / output device 31-31 in the collective storage device 31 in which the storage medium 31-a is stored.
Check the free state of .about.31-3n. Collective storage device 31
If there is a vacant I / O device in one of the vacant I / O devices (for example, the I / O device 31-3)
1) is assigned to the data input / output request, and the medium transport means 31-2 is controlled to control the medium storage unit 31-1 and the storage medium 31 stored at the position indicated by the storage number 31-A. -A is loaded into the input / output device 31-31, and allocation information indicating the input / output device 31-31 loaded with the storage medium 31-a is passed to the data input / output means 7. If there is no empty input / output device in the collective storage device 31, the process waits until one of the input / output devices in the collective storage device 31 becomes empty. At this point, the vacant input / output device (for example, the input / output device 31-31) is assigned to the data input / output request, and the same processing as described above is performed (S2).

The data input / output means 7 is provided for the input / output device 3 indicated by the allocation information from the input / output device allocation means 6.
After performing data input / output processing on the storage medium 31-a loaded in 1-31, it is determined from the sequence number or the like whether or not processing for a subsequent medium in the multi-volume is necessary (S3). , S4). If it is determined that the processing for the subsequent medium is necessary, the subsequent medium search means 8
(S5), and if it is determined that it is not necessary, the process is terminated.

The succeeding medium search means 8 performs the processing shown in the flowcharts of FIGS. 4 and 5 in S5. First, the reserved medium 31-z designated to perform the next processing by the sequence number in the multi-volume information 21A and 21B registered in the multi-volume information registration unit 21 and the processing order is one before that. It is determined whether the storage medium 31-a is stored in the same collective storage device (S11 in FIG. 4).

In this example, since the reservation medium 31-z and the storage medium 31-a whose processing order is one step earlier than the reservation medium 31-z are stored in the same collective storage device 31, the job A It is determined whether the data input / output request is a data input request or a data output request.

If it is determined that the request is a data input request, it is determined that the reserved medium 31-z is to be the subsequent medium and that the currently used input / output device 31-31 is to be used continuously. Then, the control is passed to the medium changing means 9 (S13, S14).

If it is determined that the request is a data output request, the input / output devices 31-31 to 31-31 in the collective storage device 31 are determined.
It is determined whether or not there is a request waiting for 31-3n to be available (S15).

If it is determined that there is no waiting request, the process of S13 is performed. If it is determined that there is a waiting request, after the input / output device 31-31 currently being used is vacated (S16), it is determined whether the outputable medium information is registered in the outputable medium information registration unit 22. It is determined whether or not there is an outputable medium (S17). Here, in S16, the input / output device 3
The reason why 1-31 is set to the empty state is that the input / output device 31-31 is used for the waiting request.

If it is determined in S17 that there is an outputable medium, a storage medium to be a subsequent medium is determined based on the outputable medium information stored in the outputable medium information registration unit 22 (S18). At this time, if there is only one output-capable medium, it is set as the subsequent medium. If there are a plurality of output-capable media, the output-capable media stored in the collective storage device other than the collective storage device storing the reserved media, The outputable medium stored in the storage device is preferentially used as the succeeding medium. If it is determined that there is no outputable medium in S17, it is determined that the reserved medium 31-z is a subsequent medium (S19).

Now, based on the outputable medium information registered in the outputable medium information registration section 22, the outputable medium 33 is output.
If it is determined that −z is the subsequent medium, the collective storage device 33 storing the outputable medium 33 -z is stored.
If any of the input / output devices 33-31 to 33-3 n is empty, a data input / output request is assigned to one of the input / output devices, and then control is passed to the medium switching means 9.
If there is no empty input / output device, the collective storage device 3
3. Wait until one of the input / output devices in 3 becomes empty, and when the input / output device becomes empty, assign a data input / output request to the empty input / output device. Thereafter, control is passed to the medium changing means 9 (S20). Now, for example, in S20, the collective storage device 33
It is assumed that it is determined that the input / output device 33-31 in the above is assigned to the data input / output request.

When the control is passed, the medium changeover means 9 controls the medium transport means 33-2 in the collective storage device 33, and the output possible medium determined by the subsequent medium search means 8 to be the succeeding medium is output. The medium 33-z is loaded into the input / output device 33-31 assigned by the succeeding medium searching means 8, and then control is passed to the medium management information updating means 10 (FIG. 3, S6).

When the succeeding medium is determined by the succeeding medium searching means 8 to be a succeeding medium, the medium management information updating means 10 updates the contents of the multi-volume information registration section 21 and the output possible medium information registration section 22 shown in FIG. After that, the allocation information indicating the input / output device 33-31 loaded with the succeeding medium is passed to the data input / output means 7 (S7). In our example,
Since the outputable medium 33-z is used as the succeeding medium instead of the reserved medium 31-z, the medium management information updating means 10 transmits the medium name in the multi-volume information 21B registered in the multi-volume information registration unit 21, The medium storage unit number and storage number are updated to 33-z, 33-1 and 33-Z, respectively, and the medium name and medium storage unit in the outputable medium information 22a registered in the outputable medium information registration unit 22 are updated. The numbers and storage numbers are 31-z, 31-1, 31-Z, respectively.
Update to

When the assignment information is passed, the data input / output means 7 performs the same processing as described above.

When the job A outputs a data input / output request including the medium group name 31-a, the above processing is performed. However, the job A outputs a data input / output request including the medium group name 32-a. In this case, the following processing is performed.

When job A outputs a data input / output request including the medium group name 32-a, the same processing as described above is performed by the processing medium search means 5, input / output device allocation means 6, and data input / output means 7. Then, data input / output processing is performed on the first storage medium 32-a of the multi-volume indicated by the medium group name 32-a (FIG. 3, S1 to S3). The data input / output processing for the storage medium 32-a is performed by an input / output device (for example, the input / output 32-
31).

Thereafter, when the data input / output means 7 determines that the processing for the subsequent medium is necessary (S4), the control moves to the subsequent medium search means 8.

As shown in FIG. 4, the succeeding medium search means 8 is first specified to perform the next processing by the sequence number in the multi-volume information 21Y, 21Z registered in the multi-volume information registration section 21. Reserved medium 33-a and the storage medium 3 whose processing order is one before that.
It is determined whether 2-a is stored in the same collective storage device (S11).

In this example, since the reserved medium 33-a and the storage medium 32-a whose processing order is one before that are stored in different collective storage devices, the job A is executed in S21 shown in FIG. It is determined whether the data input / output request is a data input request or a data output request.

If it is determined that the request is a data input request, the I / O device 32-31 in the currently used collective storage device 32 is vacated, and then the reserved medium 33-
a is determined to be a subsequent medium (S22, S23),
Thereafter, the process of S20 in FIG. 4 is performed.

If it is determined that the request is a data output request, the input / output device 32-31 in the currently used collective storage device 32 is vacated, and then the reserved medium 33-a is set.
It is checked whether or not an empty input / output device exists in the collective storage device 33 in which is stored (S25). And
When there is an empty input / output device (S26: YE
S) decides to use the reserved medium 33-a as the succeeding medium (S27), and then performs the processing of S20 in FIG.

If there is no empty input / output device in the collective storage device 33 storing the reserved medium 33-a (S26: NO), there is an output-capable medium, and the empty input / output device exists. A set-type storage device in which an output device exists is searched (S28).

If such a collective storage device could not be found (S29: NO), the process of S27 is performed. If the collective storage device was found, any of the outputable media stored in the found collective storage device is searched. Is determined to be one of the following storage media (S30), and then the process of S20 in FIG. 4 is performed.

When the processing of the succeeding medium search means 8 is completed,
The same processing as described above is performed in the medium changing means 9 and the medium management information updating means 10 (FIG. 2, S6, S6).
7).

[0042]

As described above, according to the present invention, the data input / output request requests the data output, and the reserved medium and the storage medium whose processing order is one before the reserved medium. If they are stored in the same collective storage device, it is checked whether there is a request waiting for the input / output device of the collective storage device to become available, and if there is, a reserved medium is stored. Media search means for preferentially setting an outputable medium stored in a collective storage device other than the collective storage device to be a subsequent medium, and data input / output requests are concentrated in a certain collective storage device. However, when the number of input / output devices in the collective storage device becomes insufficient, for processes that can be performed using another collective storage device, such as data output processing, the input / output device of another collective storage device is used. Using Since it has to, achieving uniform frequency of use of each set type storage device, it is possible to effectively utilize the output device in each set type storage device.

Further, according to the present invention, the data input / output request requests data output, and the reserved medium and the storage medium whose processing order is one before the reserved medium are stored in the collective storage device different from each other. In the case where the media is stored in the storage medium or the output-capable medium, the medium stored in the collective storage device having the empty input / output device is provided with a subsequent medium search unit that preferentially sets the subsequent medium. Therefore, the frequency of use of each collective storage device can be made more uniform, and the input / output devices of each collective storage device can be used more effectively.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a diagram showing an example of contents of a multi-volume information registration unit 21 and an outputable medium information registration unit 22.

FIG. 3 is a flowchart illustrating an overall processing example of the data processing apparatus 1.

FIG. 4 is a flowchart illustrating a processing example of a subsequent medium search unit 8;

FIG. 5 is a flowchart illustrating a processing example of a subsequent medium search unit 8;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Data processing apparatus 2 ... Medium registration apparatus 21 ... Multi-volume information registration part 22 ... Outputable medium information registration part 31-33 ... Collective storage device 31-1 to 33-1 ... Medium storage part 31-2 to 33- 2. Medium transport means 31-31 to 31-3n, 32-31 to 32-3n, 3
3-31-33-3n input / output device 5 processing medium search means 6 input / output device allocation means 7 data input / output means 8 subsequent media search means 9 medium switching means 10 medium management information update means

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G06F 3/06 G06F 3/08

Claims (3)

(57) [Claims] 1. A medium storage unit storing a plurality of storage media, an input / output device for inputting / outputting data to / from the storage medium, and a storage medium stored in the medium storage unit being input / output to the input / output device. A multi-volume control method in a data processing device in which a plurality of collective storage devices each including a storage medium loaded in the input / output device and a medium transport means for storing the storage medium in the medium storage unit are connected. A medium group name for uniquely identifying a multi-volume having the storage medium as a constituent element, an order number indicating a processing order of the storage medium in the multi-volume, and a storage position of the storage medium A multi-volume information registration unit for registering multi-volume information including: a status usable for data output processing in a storage medium stored in each of the collective storage devices; An output-capable medium information registration unit in which output-possible medium information including a storage position of an output-possible medium is registered, and a medium group name managed by the same medium group name included in a data input / output request for a multi-volume. Processing medium search means for searching the multi-volume information registered from the multi-volume information registration unit; and requesting data input / output by the data input / output request based on the multi-volume information searched by the processing medium search means. Among the storage media constituting the multi-volume obtained, a collective storage device in which a storage medium to be processed first is stored is obtained, and further, the medium transport means in the obtained collective storage device is controlled to control First, a storage medium to be processed is loaded into an input / output device, and thereafter, an input / output device that outputs allocation information indicating the input / output device into which the storage medium is loaded. Data allocation processing means for performing data input / output processing in accordance with the data input / output request with respect to a storage medium loaded in an input / output device indicated by the allocation information, and thereafter determining whether or not processing for a subsequent medium is necessary. A data input / output means for determining, and a means for determining a storage medium to be a subsequent medium when the data input / output means determines that processing on the subsequent medium is necessary, and determining an input / output device to which the subsequent medium is assigned. The reservation in which the data input / output request is for requesting data output and the next processing is designated by the sequence number of the multi-volume information registered in the multi-volume information registration unit If the medium and the storage medium whose processing order is one before the reserved medium are stored in the same collective storage device, the collective storage It checks whether there is a request waiting for the input / output device of the device to be available, and if not, sets the reserved medium as a subsequent medium, and stores the storage medium as the subsequent medium in a collective storage. The succeeding medium is allocated to an empty input / output device in the device, and if there is, the output-capable medium stored in the collective storage device other than the collective storage device in which the reserved medium is stored is preferentially assigned to the subsequent medium. A succeeding medium searching means for allocating the succeeding medium to an empty input / output device in the collective storage device in which the storage medium serving as the succeeding medium is stored; By controlling the medium transport means in the stored collective storage device, the subsequent medium is loaded into the input / output device assigned by the subsequent medium search means, and then the subsequent medium is Medium replacement means for outputting allocation information indicating the loaded input / output device; and one of the output-capable media indicated by the output-capable medium information registered in the output-capable medium information registration unit as a subsequent medium. A multi-volume information storage unit for updating the multi-volume information stored in the multi-volume information registration unit and a medium management information updating unit for updating the output possible medium information stored in the output possible medium information unit. Volume control method. 2. The subsequent medium search means, wherein the data input / output request requests data output, and the reserved medium is different from a storage medium which is one processing order earlier than the reserved medium. In the case where the storage medium is stored in the collective storage device, of the reserved medium or the output-capable medium, the one stored in the collective storage device having an empty input / output device is preferentially set as the subsequent medium, and 2. The multi-volume control method according to claim 1, further comprising a configuration of allocating the succeeding medium to a free input / output device in the collective storage device storing the storage medium as the succeeding medium. 3. When the data input / output request is a request for inputting data, the subsequent medium search means includes:
3. The apparatus according to claim 2, wherein the reserved medium is a subsequent medium, and the subsequent medium is allocated to a free input / output device in a collective storage device in which the storage medium serving as the reserved medium is stored. Multi volume control method.