JPS62135037A - Data transfer system for local area network - Google Patents

Abstract

PURPOSE:To attain uniform and efficient data transfer in a system by designating priority to a data generated in each computer, storing the data temporarily to a disc device not on emergency and transferring it to an object computer when no line is used. CONSTITUTION:In transferring a data from a computer 3 to a computer 4, when it is discriminated to be not on urgency, a data processing section 22 of the computer 3 sets a heater to the head of the data, requests the transfer of the data to the computer 4 for a server 2 and transfers the data to the server at the same time. When discriminated to be urgent, the data is transferred directly to the computer 4. When the server 2 receives the data transfer request from the computer 3 to the computer 4, the server 2 discriminates whether or not the data is to be transferred on urgency. In discriminating the transfer to be on urgency, the server transfers the data instantly and when not urgent, the data is stored in a disc device 7 in the server 2. Further, a line controller 18 allows a transceiver 12 and a line state sense device 15 to confirm the line state, and when a line 1 is idle, a data processing section 21 transfers the data to the computer 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a data transfer system in a nine local area network data processing system connected to a plurality of computers via a server line.

(Prior Art) In a data processing system in a local area network, data processing and transfer requests from each computer are sequentially processed in the order in which they occur.

(Problem to be Solved by the Invention) Therefore, when a computer attempts to transfer data to another computer or all other computers in the system, regardless of the congestion on the line, Even if data is not urgently needed, data transfer is performed when a request is made.

This will further increase if the line is busy, and not only will the throughput of the entire system drop, but if the line is empty, it may not be used at all.

The purpose of the present invention is to prioritize data generated in each computer, temporarily store the data in a disk device if it is not urgent, and transfer it to the target computer when the line is not in use. An object of the present invention is to provide a data transfer method for a local area network that can achieve uniformity and efficiency of data transfer within the system.

(Means for Solving Problems) In order to achieve the above-mentioned objective Y, the local area network data transfer method according to the present invention is a local area network data processing system that connects input/output devices to nine or more computers, It consists of a plurality of servers to which disk devices are connected, and a line connecting the server to the computer, and the server and the microcomputer have a transceiver having an interface χ with the line,
a sense device connected to the transceiver and monitoring whether or not the line is in use; a sense device connected to the transceiver and communicating data with other equipment through the line 7;
It consists of a line control device that performs control 7, and a data processing section that is connected to the line control device and performs data processing.When the data generated from the microcomputer is urgent, it is directly transferred to the target computer, and If not, the data is provided with a header, transferred to the server and stored in the disk device, and when no data is flowing on the line, the data is transferred to the target computer in priority order.

(Example) Hereinafter, the present invention will be explained in more detail with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of a local area network data transfer method according to the present invention, and is an overall diagram of a data processing system.

24711 through Server 2 and Computer 3.4.
5 and 6 perform data processing. A disk device 2 is connected to the server 2.

Computers 3, 4.5 and 6 have disk drives fk8
, an input/output device 9, a line 1o, and a printer device 11 are connected.

FIG. 2 is a diagram showing details of the server 2 and computer 3.4 of FIG. 1.

In server 2 and computer 3.4 transceivers 12, 13 and 14 have an interface with line 1. Line sense device 15.16 Machining 17
monitors whether line 1 is in use. Line control devices ats, ts, and 20 control data exchange with other devices through line 1.

Data processing units 21, 22 and 23 perform data processing within the server and computer.

FIG. 3 is a diagram showing an example of the format of data flowing on a line or data stored on a server disk.

If the processing data generated in each computer is not urgent, a header is provided, and the data is transferred to the server and stored in the magnetic disk device 7. In case of emergency, data is directly transferred to the destination computer. The header section consists of parts specifying emergency/normal instructions, transfer deadline, server number, number of transfer destinations, transfer destination number, and transfer destination input/output device. .

4th. 5 and 6 are processing flowcharts of the computer and server, and are examples of non-urgent data transfer.

Each processing flow χ will be explained below with reference to FIG.

FIG. 4 is a flowchart for processing non-urgent data in a computer.

When the need arises for data transfer from the computer 3 to the computer 4, a determination is made as to whether or not it is an emergency (step 31). If it is determined that the data is not urgent, the data processing unit 22 of the computer 3 sets a header shown in the data format shown in FIG. Transfer to the server (step 34).

If it is determined that it is urgent, the data is transferred directly to the target computer (step 32).

FIG. 5 is a flowchart of the process of storing data in the disk device of the server.

When the server 2 receives the data transfer request χ from the computer 3 to another computer (step 35), it determines whether the data is an urgent transfer (step 3).

If it is determined that it is urgent, the data is transferred immediately (step 37), and if it is not urgent, the data χ is stored in the disk device IL7 in the server 2 (step 38).

FIG. 6 is a flowchart of data transfer processing by the server. The server 2 determines whether there is data to be transferred to the disk device gIL7! A judgment is made (step 39). Then, if the data processing unit 21 exists, the line control device fi! 118 to confirm the line status. As a result, the line control device 18 causes the transceiver 12 and the line state sensing device 15 to confirm the line state (step 40). If the line 1 is recognized as empty, the data processing unit 21 transfers the data to the target computer 4 (step 40). Step 41).If line l is not empty, the main processing waits until the next scheduling (step 42).

In addition, when the transfer deadline approaches, the data processing unit 21
is forcibly transferred to the destination computer as urgent data.

(Effects of the Invention) As described above in detail, according to the present invention, the following effects are produced.

First of all, by separating data that must be transferred urgently from data that is not urgently required, and transferring 7 times of non-urgent data during the entire line time, the load factor of line usage can be averaged. . Furthermore, urgent data can be transferred much faster.

Second, the server handles non-urgent data transfer processing from the computer to other multiple computers, thereby improving the computer's throughput.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a local area network data transfer method according to the present invention, FIG. 2 is a diagram showing details of a server and a computer, FIG. 3 is a diagram showing an example of a data format, and FIG. 4 is a diagram showing details of a server and a computer. is a flowchart for processing non-urgent data in a computer, and FIG. 5 is a flowchart for storing data in a server disk device.
FIG. 6 is a flowchart of data transfer processing by the server. 1...-line 2...Sanoku 3.4,5
, 6... Computer 7. 8... Disk installation & 9... Input/output device 10...
・Line 11... Printer device 12, 13.1
4... Transceiver 15, 16.17... Line status sensing device 18, 1
9.20...Line control device 21, 22.2
3...Data Processing Department Patent Applicant NEC Corporation Agent Patent Attorney Jusai Inoro 40

Claims (1)

[Claims] A local area network data processing system includes a plurality of computers to which input/output devices are connected, a plurality of servers to which disk devices are connected, and a line connecting the computers and the servers, and the servers and microcomputers are connected to the line. a transceiver having an interface with the transceiver; a sense device connected to the transceiver to monitor whether the line is in use; and a line connected to the transceiver to control data exchange with other equipment through the line. It consists of a control device and a data processing unit connected to the line control device and processing data.If the data generated from the microcomputer is urgent, it is directly transferred to the target computer, and if it is not urgent, it is transferred to the data processing section. A local area network characterized in that a header is provided, the data is transferred to the server and stored in a disk device, and when data is not flowing through the line, the data is transferred to a target computer in priority order. data transfer method.