JPH02236654A - Method for managing multiple file for multiprocessor system - Google Patents

Abstract

PURPOSE:To efficiently use the area of a secondary memory device by storing information usable in a system commonly in one area of the secondary memory device comprehensively, and sharing it with every processor. CONSTITUTION:When an application program 6 issues an accel request for a printer 5 to an operating system 7, the operating system 7 recognizes that its own filing system is the area C of the secondary memory device 4 from the content of a file system information area 8, and refers to a file in the area C of the secondary memory device 4 via a communication line 3 and the processor 1, and identifies that the printer 5 is the one held by the processor 2. Next, the operating system 7 performs input/output on the printer 5, and returns a result to the application program 6. Thereby, it is possible to utilize the arbitrary area of the secondary memory device as a route file system, for example, by rewriting the content of the file system information 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a file management method in a multiprocessor system in which an operating system and application programs are distributed to each processor.

[Conventional Technology The conventional file management method and its problems in a multiprocessor system in which an operating system and application programs are distributed to each processor are as follows.

(i) A distributed file management method in which independently operating uniprocessor devices are connected via a communication path so that files of other processors can be accessed requires a secondary storage device to be connected to all processors. However, the disadvantage is that the cost of the system configuration increases.

(ii) The split network disk method uses the secondary storage device of another processor as a virtual secondary storage device for a processor that does not have a secondary storage device from system startup. An independent secondary storage area is required for processors that do not have the same. Therefore, in reality, it is necessary to store operating system load modules etc. that have the same contents separately, which requires a large capacity for each area, and as the number of processors in the system increases, storage area becomes wasted. It has the disadvantage of being exposed.

(iii> The shared network disk method in which all processors share the root file system of a processor having a secondary storage device has the disadvantage that one processor cannot have a closed root file system.

[Problems to be Solved by the Invention] The present invention solves the disadvantages of the prior art, such as uneconomical system configuration, inefficient use of secondary storage space, and non-independence of the root file system. An object of the present invention is to provide a multiple file management method for a processor system.

[Means for solving the problem] In order to achieve the above object, in the present invention, (l)
Files that are shared throughout the system, such as operating system load modules, are managed separately from the routes that are recognized by application programs on each processor.

(ii) Each processor has changeable information as to which secondary storage area is used as the root file system that the application program on each processor is aware of.

[Operation] The file system of each processor and the files shared by the entire system are stored in separate secondary storage areas and used as the file system of each processor.

[Embodiment] FIG. 1 shows a configuration example of a multiprocessor system implementing the present invention, in which 1 and 2 are processors, 3 is a communication path between the processors, 4 is a secondary storage device, 5 is a printer, 6
is an application program, 7 is an operating system, 8 is
is the file system information area.

As shown in FIG. 2, the file system information area 8 stores identification information of the connected processor of the secondary storage device that stores the root file system, identification information of the secondary storage device Wl that stores the root file system, and It consists of area identification information.

The root file systems of processors 1 and 2 are allocated to areas B and C of secondary storage device 4, respectively. In area 8 of the secondary storage device 4, load modules of an operating system, etc., which are loaded into the processors 1 and 2 when the system is started up, are stored.

The procedure of the method of the present invention will be explained by taking as an example the operation when the application program 6 on the processor 2 accesses the printer 5. FIG. 3 is a flowchart showing this file access processing procedure.

First, application program 6 is operating system 7.
When the operating system 7 makes an access request to the printer 5, it learns from the contents of the file system information area 8 that its own file system is the C area of the secondary storage device 4, and connects the communication path 3 and the processor 1. The processor 2 identifies that the printer 5 is owned by the processor 2 by referring to the file in the C area of the secondary storage device 4 via the printer.

Next, the operating system 7 performs input/output to the printer 5 and returns the results to the application program 6.

Because of this effect, for example, by rewriting the contents of the file system information area 8, any area in the secondary storage device can be used as the root file system.

Furthermore, since the load modules of the operating system that are common to the system are collectively stored in area A, there is no need to store them in separate areas for each processor.

[Effects of the Invention] The present invention can achieve the following effects based on the above-described configuration and operation.

(1) Information that can be commonly used within the system, such as the load module of the operating system, can be stored in one area of the secondary storage device and shared by each processor; area can be used efficiently.

(ii) Regardless of whether or not a secondary storage device is installed, any secondary storage area can be used as the root file system of each processor, making it possible to create a multiprocessor system in which application programs run on all processors. Can be constructed economically.

(iii) Since the root file system of each processor is closed within the processor, an independent root file system that is invisible to other processors can be constructed for each processor.

[Brief explanation of drawings]

FIG. 1 is a configuration example of a multiprocessor that implements the method of the present invention, FIG. 2 is an explanatory diagram of a file system information area, and FIG. 3 is a flowchart explaining the operating procedure of the method of the present invention. . 1.2: Processor 3: Communication path between processors 4: Secondary storage device 5: Printer 6: Application program 7: Operating system 8: File system information area

Claims (1)

[Scope of Claims] A plurality of information processing devices each having a processor to which a secondary storage device is not connected and an information processing device having a processor to which a secondary storage device is connected are installed,
In a multiprocessor system in which an operating system and application programs are distributed on each processor of a system in which a plurality of information processing devices are connected via communication paths, a secondary storage device of a processor to which a secondary storage device is connected is used. The storage device storage area is divided into multiple areas, one area stores files shared between each processor, the other area stores the root file system for each processor, and secondary storage stores the root file system. Each processor has a file system information area consisting of information that identifies the processor connected to the device, the secondary storage device, and the storage area of the secondary storage device, and the files shared between each processor are shared by the application program on each processor. It should be managed separately from the conscious root and used as a root file system that is conscious of application programs on each processor2.
A multiple file management method for a multiprocessor system, characterized in that the next storage device storage area is specified using changeable identification information of a file system information area.