JPS61193250A - Utilization system of peripheral equipments - Google Patents

Abstract

PURPOSE:To advance the utilization of equipment resources and to improve operationability by adding an allocation system whereto information obtained by an automatic medium recognition feature is incorporated, to the conventional method of allocating equipment groups. CONSTITUTION:When a medium is loaded to a peripheral equipment, an automatic medium recognition device 2 detects it and automatically reads out the name of the medium, reflecting it in resource control information 3. An equipment control information input unit 1 inputs peripheral equipment constitution information 4 and resource control information 3 and outputs tables P 5, A 6 and D 7. Table D 7 is for the control of equipment allocation and Table P 5 is related to loading a medium and Table A 6 is related to common use of equipments and media/area use.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a method for using peripheral devices, and in particular to a device resource management method for efficiently allocating peripheral devices to programs when a large number of peripheral devices are connected in a computer system. Regarding.

One of the most widely used methods for using peripheral devices is a method in which peripheral devices are divided into groups and peripheral devices from those groups are assigned to user programs.

This method has the drawback that only the devices are taken into consideration, and the device allocation does not take into account the media loaded on the devices. For example, assume that a request from a user program requests media B and media C from device group A, device group A has devices @1.2.3, and device 1 has media C. Assume it is loaded. At this time, in the conventional device allocation method, device 1 is allocated in response to the first request, and loading of medium B is requested. Next, in response to the second request, the device 2 is assigned and requests loading of the medium C.

In this way, even though the medium C has been loaded in the device in advance, a loading request is issued to another device, making it impossible to make effective use of the condition that the medium is already loaded, resulting in an operation error. Sexuality is getting worse.

1 Mamedandan 1 The present invention addresses such situations and adds an allocation method that takes into account information obtained from an automatic medium recognition mechanism to the conventional device group allocation method, thereby improving the effective use of device resources and operability. The purpose of this invention is to provide a method for using peripheral devices that is even more efficient.

Composition of the Invention The peripheral device usage method according to the present invention provides a device group information storage section that stores peripheral devices in a plurality of groups in a computer system having a plurality of peripheral devices, and a device group information storage section that stores peripheral devices connected to the system. A device management information storage unit that stores the number, attributes, and characteristics of devices, as well as the name of the media loaded in the peripheral device and the name of the media that is requested to be loaded; The present invention is characterized in that an input section is provided for inputting information, and the optimal peripheral device and medium allocation is made based on each information from the device group information storage section, the device management information storage section, and the input section.

1 blind 3 Next, the present invention will be explained with reference to the drawings.

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

In the figure, device group information 9 indicates a large number of peripheral devices.
Device groups are stored that are defined based on their attributes and characteristics, for the purpose of improving the operability of loading media, for the purpose of discriminatory use of devices, or from the viewpoint of data security. The definition of this device group is performed by a system configuration generation program when the system is in operation, and is stored on the magnetic disk. The device group information input device 8 receives device group information as input and outputs 0 table 10.

This G table 1・O is a table expressing the relationship between individual devices and device groups, and the number of defined device groups is 1.
When there are eight peripheral devices, this 0 table becomes a matrix with I rows and J columns. Then, when peripheral device j is defined as a component device of device group i, Gi,j-1, and when it is not defined, Gi,j=o (i
, j are each an integer from 1 to [1 to J].

Peripheral device configuration information 4 includes the number and attributes of all peripheral devices connected to the computer system.

It stores characteristics and the like, is stored on a magnetic disk device, and is loaded into the main storage device when the system is started up. The resource management information 3 is a table that manages the current status of peripheral devices such as online, offline, in use, free, and failure occurrence.

When a medium is loaded in a peripheral device, the automatic medium recognition device 2 detects it, automatically reads the name of the medium, and reflects it in the resource management information 3. Alternatively, if a medium is removed from a peripheral device, this is detected and reflected in the resource management information. The automatic medium recognition device 2 also manages online, offline, etc.

, the device management information input device 1 receives peripheral device configuration information 4 and resource management information 3 as input, and P table 5. A table 6° and D table 7 are output. D-table 7 is a table for device allocation management, and is a matrix with one row and one column.

Letting the value of the element be Di, its initial value is P.Table 5 is a table related to loading of the medium, and the value of the element is expressed as follows.

Pi, j-0: Attachment! The medium requested by request i is not loaded on lj.

Pi,j=1: The medium requested by request i is loaded on device j.

Table A 6 relates to shared/exclusive use of devices and media;
The element takes the following values.

Ai,j-0: device j is not assignable to request i Ai,j-1: Device j is assignable to request i.

The user program device/medium request information 12 stores information regarding devices and media from programs that use peripheral devices, and includes information such as the name of the requested device group, the number of devices, and the name of the medium. There is. The user program device/medium request information input device 11 inputs the device/medium request information 12 of the user program and outputs an R table 13. Table 13 is device request information, and is a matrix with one row and one column. Assuming that the value of each element is R1, its initial value is expressed as: Ri=total number of devices requested for the device group.

Device allocation control bag @14 is P table, A table, and D table.

It inputs the G table and the R table, and outputs 8 tables 15 using an algorithm that enables optimal device allocation, and finally outputs device allocation result information 16.

8 Table 15 is a table used when making device allocation,
It is a matrix with I rows and J columns.

The device allocation controller 14 performs device allocation in a manner that allows for optimal device allocation, which will be described in detail below. Device allocation control is performed in the following three phases as shown in FIG.

Phase 1: Among the requested media, the media already loaded in the device are allocated.

Phase 2: Perform equipment allocation processing to satisfy the number of equipment requests, and modify the allocation in Phase 1.

Phase 3: Perform device allocation processing to satisfy the number of device requests, and modify the allocations of Phase 1 and Phase 2.

As a result of the device allocation in these phases 1 to 3, if the allocation is not completed, device resources will be insufficient and the user program will wait for device resources. Furthermore, if an abnormality is detected during device allocation in Phases 1 to 3, the user program terminates abnormally.

In phase 1, media allocation is performed according to the following rules.

Rule 1: When Pi, j-Gi, i=1. Since the medium is already loaded, Ai.

If it is j-0, it is assumed to be waiting for device/medium resources.

If Ai, j-1, device j is provisionally Assign to request i. As a result, R table.

Modify Table D as follows.

[)i=[)i-1, R1-R1-1 Rule 2: When Pi, j-Gi, j-1. Ai.

If i=O, assign device j to request i I can't. If Ai, j-1 For example, device j can be assigned to request i. It is Noh.

Rule 3: When Pi, j-Gi, i=1. Indicates that the media request is loaded on a device other than the requester. At this time, if Ai,i=0, it is assumed that the device has media resources. Ai.

If i=1, force the media loading state within the requested device group. request the operator to reload the shall be taken as a thing.

In phase 2, devices are allocated using the method shown in FIG. In the device iteration step 21), when devices are allocated starting from the smallest device number, the loop variable j is changed in the direction of increasing from 1 to J.

This is called forward allocation. Conversely, when devices are allocated starting from the oldest device number, the loop variable j is changed in the direction of decreasing from J to 1. This is called backward allocation. This will take place in Phase 3. Repeating device groups 22) repeats device groups in descending order of device group numbers.

In calculation (23) in Table 8, the value Si representing the margin of the device,
Calculate j.

Si, i=[)i-Ri Here, Di is the number of allocatable devices belonging to device group i, and similarly, Ri is the number of device requests for device group i.

In the device allocation process (24), devices are allocated based on the above-mentioned Si, j and other tables according to the following rules.

Rule 4: When Gi, j-Ai, i=o, device guessing is not performed.

Rule 5: When Ri=O, device allocation is not performed.

Rule 5: If there are two or more device groups j where 3i, j=o, device allocation is impossible. In only one case, device @j is assigned to the request of device group i.

Rule 7: When Si, j<O, rule assignment is impossible.

Rule 8: If there is one or more device groups i such that Si, j>O, device j is assigned to the device group i with the smallest value of Si, j.

When a device is allocated, that information is stored in the information allocation result information 16 in FIG. Correction of table R and correction of table D (2
5) is performed according to the following rules.

Rule 9: When device j is assigned to a request for a certain device group i, Ri-R'i-1 is assigned. If not assigned, leave it as is.

Rule 10: Let Di-Di-Gi, j-Ai, j.

The determination of the completion of allocation (26) is performed according to the following rules after the above-described processing has been completed for all devices j.

Rule 11: If all requests R1 are cleared and all are 0, the allocation is completed.

If there is even one other than O The assignment is incomplete.

In phase 3, the device repeats 21 in FIG.
) is the same as phase 2, except that the process changes in order of oldest device number, that is, the loop variable j is changed in a decreasing direction from J to 1.

The device allocation result information processing unit 20 is an interface portion for extracting allocation result information to the outside when the above-mentioned allocation processing is completed.

FIG. 4 is an example of a G table showing the definition of device groups, and the mark Q in the figure indicates Gi, j-1.

FIG. 5 is an example of an R table showing device requests from a user program.

FIG. 6 is an example of Table D showing the number of devices by group. Figure 7 shows how Di changes with the change in device allocation.
This is an example showing R1. FIG. 8 is an example showing Si, j that changes with the transition of device allocation and the allocated devices. The circle in the figure indicates the assigned device. □ Effects of the Invention As mentioned above, the present invention is a device grouping method for efficiently using a plurality of peripheral devices, and a device allocation method for effectively using a requested medium that is already loaded. Adopts a forward allocation method and a backward allocation method that allow device allocation even in multiple device configurations where one device belongs to multiple device groups, allowing for versatile and easy-to-use device resource management. becomes.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is a flow diagram showing a control method for optimal device allocation, and Fig. 3 is a block diagram of an embodiment of the present invention.
Figure 4 is a flowchart showing the control method for device allocation in phase 2 of the figure, Figure 4 is a diagram showing an example of the G table that shows the definition of a device group, and Figure 5 is the R table that shows the device requests from the user program. Figure 6 is a diagram showing an example of D table showing the number of devices by group, Figure 7 is a diagram showing an example of Di and R1 that change with the transition of device allocation, Figure 8 The figure shows Si, J and allocation that change with the change in equipment allocation.
. FIG. Explanation of symbols of main parts 1...Device management information input device 2...Automatic medium recognition device 3...Resource/medium management information 4...Peripheral device configuration information 8...Device group information input device 9...Device group information 11...User program device/medium request information input device 12...User request information 14...Device allocation control device

Claims (1)

[Claims] In a computer system having a plurality of peripheral devices, there is provided a device group information storage unit that stores these peripheral devices in a plurality of groups, and the number, attributes, and characteristics of the peripheral devices connected to the system, as well as the peripheral devices. A device management information storage unit that stores the name of the media loaded in the device and the name of the media that is requested to be loaded, and an input unit that inputs peripheral device and media request information by a user program, and the device group information A peripheral device utilization method characterized in that an optimal peripheral device and medium allocation is made based on information from a storage section, a device management information storage section, and an input section.