JPH0573399A - Memory sharing method between work stations - Google Patents

Abstract

PURPOSE:To enable the work stations to share a memory through a LAN. CONSTITUTION:When access to an address which is not in the memory that the work station A has is initiated on the work station A, the memory control part 5 of the work station A makes a communication with the memory control part 5 of the work station B through a LAN line 6 and when the address is an address of the memory that the work station B has, the memory control part 5 of the work station B allows access to the memory 2 that the work station B has, so that the work station A uses the memory of the work station B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a memory sharing method in a system including a plurality of workstations connected to a LAN.

[0002]

2. Description of the Related Art Conventionally, a memory is a resource unique to a work station that holds the memory, and each work station operates by using its own memory resource. Therefore, no matter how much memory was present in other workstations on the LAN, it could not be used.

[0003]

The above-mentioned conventional workstation cannot operate if the memory in the own workstation is insufficient, or it is necessary to perform swapping on the hard disk in the own workstation. was there.

The present invention solves the inoperability of software due to the lack of memory in the workstation itself of the workstation in the above system.

[0005]

The present invention provides a LAN (Lo)
In the method of sharing memory between workstations in a workstation connected by a cal area network circuit, the CP of the first workstation
When U tries to access a specific address, the memory management unit of the first workstation communicates with the memory management unit of the second workstation via the LAN to allow the memory management of the second workstation. It is characterized by accessing.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a system configuration diagram of the present invention, and FIG. 2 is a processing flowchart of the memory management unit 5 of this embodiment.

In FIG. 1A, workstation A and workstation B are both personal computers connected by a LAN. In each workstation, the CPU 1 reads and writes data to and from the memory 2 and I / O 3 connected to the internal bus 4 via the memory management unit 5. When an address other than the memory stored in the own workstation is accessed in the workstation A, the memory management unit 5 of the workstation A communicates with the memory management unit 5 of the workstation B via the LAN line 6. If the memory address of workstation B is used, workstation A uses the memory of workstation B by allowing memory management unit 5 of workstation B to access memory 2 of workstation B. Will be done.

In addition to the embodiment shown in FIG.
As shown in (b), a system with only a memory device is connected to a LAN.
Embodiments of connecting to In FIG. 1 (b),
By connecting a dedicated memory device having only the memory device 7 on the LAN line 6 through the memory management unit 5,
Memory can be accessed from all workstations on the AN line.

Next, the flowchart of FIG. 2 will be described. When the CPU 1 tries to access a specific memory in the first workstation (step 1), it is determined whether it is a memory access within the own workstation or a memory access to another workstation (step 2). If it is the memory access in the own workstation, the access processing to the memory in the own workstation is performed (step 3), and if the memory in the other workstation is accessed, the memory management unit of the other workstation is accessed through the LAN line. Communication is performed, the memory is accessed (step 4), and the process ends (step 5).

[0011]

As described above, the present invention has the effect of enabling communication between workstations via a LAN line and enabling memory access to other workstations.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of the present invention.

FIG. 2 is a processing flowchart of a memory management unit 5 according to the present embodiment.

[Explanation of symbols]

 1 CPU 2 memory 3 I / O 4 internal bus 5 memory management unit 6 LAN 7 large capacity memory device

Claims (1)

[Claims] 1. A LAN (Local Area Net)
In a method of sharing memory between workstations in a workstation connected by a work circuit, a first method is provided.
When the CPU of the second workstation attempts to access a specific address, the memory management unit of the first workstation communicates with the memory management unit of the second workstation via the LAN to obtain the second address. A method of sharing memory between workstations, characterized by accessing the memory of a workstation.