JPH06149754A - Network system - Google Patents

Abstract

PURPOSE:To provide the network system which need not have dedicated communication software for each processing function without being aware of hardware and an operating system (OS) on the hardware. CONSTITUTION:This network system features object-oriented application software programs 6 and 7, and 10 and 11 which perform task control only by sending and receiving messages in all nodes 2 and 3 connected to the network, and task control routers 5 and 9 in queue structure by the nodes which are stored with information showing which node the individual application software programs in all the nodes are present in and rearrange the order of task actuation messages according to priority information and queue and send the actuation messages according to the loads on the arithmetic units in the respective nodes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network system capable of distributed processing.

[0002]

2. Description of the Related Art A conventional software multi-vendor network system is shown in FIG.

In the system of FIG. 7, data 38 and 40 and files are exchanged between computer nodes 32 connected by a communication line 31 of the network system and application software 42, 43, 44 and 45 which are processing means in the computer node 33. 39 and 41. In order to exchange these data and files, dedicated communication software 34, 35,
36 and 37 are required. Therefore, in such a conventional network system, in order to connect different types of nodes (computers, etc.) and perform distributed processing, a dedicated program for communicating via the network is prepared for each processing function. There is a need to. For this reason, if it becomes necessary to expand the functions of the system that is already in use, adding a node to realize a system that divides the functions not only develops additional application software, but also combines each function. There is a problem that a dedicated communication software has to be developed, and a lot of man-hours are required for software development.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a network system that does not need to be aware of hardware or an operating system (OS) on the hardware and does not need to have dedicated communication software for each processing function. Is to provide.

[0005]

In the network system in which a plurality of information processing devices are connected by a communication line, the above-described objects are to provide an information processing device for performing information processing in the information processing device and the information processing device. A task control router for performing task management of the information processing device, the task control router storing information on which information processing device connected to the network system the information processing device resides in; A message organizing unit that rearranges the order of messages including priority order information according to the priority order information, a message storage unit that stores the messages whose order is rearranged, and a process execution unit according to the load of the arithmetic unit in the information processing apparatus. A message issuing means for waiting and sending a message and the message is sent through a communication line. It is achieved by a network system, characterized in comprising a message sending and receiving means for transmitting and receiving messages.

[0006]

In the network system of the present invention configured as described above, information processing between different types of information processing devices (nodes) is performed without being aware of the difference in the hardware of the information processing devices and the operating system. The task management of the application software, which is a means, becomes possible, and a multi-vendor distributed processing system in which the functions are shared by a plurality of heterogeneous nodes can be easily realized.

Further, by passing a message by the task control router, an arithmetic unit (CPU) which is not possible in the conventional system for passing a message by a dedicated communication program for each function of the application software which is the information processing means. , MPU, etc.) and prioritization of task activation can be performed, and proper operation of the arithmetic unit can be maintained.

[0008]

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

FIG. 1 is a diagram for explaining one embodiment of the present invention. First, the configuration of the system will be described. A computer node 2 and a computer node 3 which are information processing devices connected by a communication line 1 of a network system.
The hardware consists of.

The internal configuration of the computer node 2 includes an operating system (OS-A) 4 unique to the node 2, a task control router 5, application software 6 and application software 7 which are information processing means. The composition is
Operating system (OS-B) unique to node 3
8, task control router 9, application software 10 and application software 11 which are information processing means.

As shown in FIG. 1, one node must have 1
Take the configuration where there are two task control routers,
The messages that flow through the network by the task control router are common to the task control routers at all nodes. Also, the application software 6, 7, 10 and 11 is not particularly limited as long as it can be executed on the OS of the node normally in each node, but the execution means differs depending on each node. If the operation when the application software is executed differs depending on the individual node, the operation becomes complicated, and each operating method must be remembered for each node connected to the network. Since the above-mentioned problem arises, it is preferable to use object-oriented programming that manages tasks only by passing messages whose operation method is unified and perform independent processing.

The application software 6, 7, 10 and 11 operating on each node 2 and 3 connected to the network system sends a message to the task control routers 5 and 9 where the application software itself exists. Interact. In addition, in all task control routers of each node, what application software exists in which node under the network is stored in advance.

The task control router in each node will be described in more detail below. FIG. 2 is a block diagram for explaining the function of the task control router, which exists in all the nodes connected to the network line 1, and the inside of this task control router has the following configuration. .

An application task database (hereinafter, database is abbreviated as D / B) 51 is application software (application software 6, 7, 10 and 11 in this embodiment) in all nodes connected to the network line 1. It stores information such as the processing function of the node, the result and data obtained by the processing, the node in which the application software exists, and the current state of the application software.

The message organizing task 52 judges whether the message sent from the application software 6 and 7 in the own node 2 is addressed to the own node or to another node. And the messages received by the network reception task 56 from other nodes are rearranged and rearranged according to the issuing time and the priority, and the rearranged messages are sent to the message queue 53 for storage. In the case of a message addressed to another node, the message is issued to the network message transmission task 55 and the message is transmitted to the other node.

The message queue 53 stores the messages organized by the message organizing task 52.

The application activation task 54 monitors the load factor of the CPU in the own node 2, and controls the CPU so that the CPU does not become overloaded. A message is sent to the application software 6 or 7 to activate a task.

The network message transmission task 55 takes in the messages addressed to the other node which are organized by the message organization task 52, and the application software D / B
The information of the message transfer destination node is taken out, and based on the information, the information necessary for the transfer destination node and the message are formed into a packet and the message is transmitted to another node through the network line 1.

The network message receiving task 56 takes in the information of the packet transmitted through the network line 1, takes out the message from the packet and issues it to the message organizing task 52.

The operation of the network system of the present invention will be described below based on the above configuration.

First, the outline of the operation of the network system will be described. Here, as an example, it is assumed that the application software 6 in the node 2 in the network is executed and the execution result Z is obtained.

When the application software 6 is executed and the application software 6 needs the data A to obtain the result Z, the request for the data A issued from the application software 6 by the processing of the application software 6 in the node 2 is , Is set as a data request function of OS-A4 on which the application software 6 is operating,
By setting the data request function of S-A4, the data request of the application software 6 causes the message control task 52 of the task control router 5 in the node 2
It is captured as a message by.

This message is sent to the OS of node 2
It is not a data request function by A4, but is common to the task control routers in all the nodes connected to the network line 1, and requests the data A and the task requesting the data A (in this case, the application It has software 6) as information. The data request of the application software 6 is fetched as a message by the message organizing task 52 of the task control router 5 in the node 2. The fetched message (here, the request for data A and the task requesting it) is determined, the application task D / B 51 is inquired, and the task requesting data A (application software 6 in this case) Is registered in the application task D / B 51 that is in the data input standby state, and the task that supplies the data A requested by this message (the application software that outputs the data A as the processing result) It judges whether or not it is in its own node.

If the task supplying the data A is in its own node, all the registered messages in the message queue are read from the message queue 53, a new message (request for data A) is added, and the issue time is issued. Swap the order of messages from and priority.

Next, the request message for the data A stored in the message queue 53 is taken out by the application activation task 54, and the application software in the own node 2 that outputs the data A is activated. Here, the application activation task 54 is the CP
The U load rate is monitored, and when the load is normal, the first message is taken out from the message queue 53 and the necessary application software 7 is activated.

The application software 7 which has received the activation instruction from the application activation task 54 performs processing in accordance with the activation instruction and outputs data A here. The output data A is set as a data output function on the OS-A4, and this data output function is once arranged as a message having a task (application software 7 in this case) that outputs the data A and the output data A as information. It is taken into the task 52.

The message of the output data A fetched by the message organizing task 52 is organized in the message organizing task 52 and stored in the message queue in the same manner as the request message of the data A described above. Then, the application starting task extracts the message of the output data A from the message queue, the output data A is delivered to the application software 6, and the application software 6 in the standby state resumes the processing and the result Z
Is obtained.

The data request target from the application software 6 is the application software 1 in the other node 3.
In the case of the data B supplied by 0, the message organization task 5 that fetches the request of the data B as a message
2 judges the fetched message (here, the request for data B and the task requesting it), inquires to the application task D / B 51, and outputs the requested data B as a processing result. It is determined that the existing task is in the other node 3, and the request message of the data B is transferred to the network message transmission task. Then, the fact that the task requesting the data B (in this case, the application software 6 in the node 2) is in the data input standby state is registered in the application task D / B 51.

Network message transmission task 55
Takes in the message transferred from the message organizing task 52, converts the message into data for packet communication, and transmits the data to the network line 1.

The packet communication transmitted through the network line 1 is received by the task control router in the node 3. The task control router 9 similar to the node 2 exists in the node 3, and the communication from the network line 1 is received by the network message reception task 56 in the task control router 9 in the node 3 and sent. Only the selected message is transferred to the message organizing task 52. In the message organization task,
The transferred request message for the data B is stored in the message queue 53 according to the issue time and the priority, and the node 3
The application orbital task 54 inside retrieves the request message of this data B from the message queue 53,
The necessary application software 10 is activated, and the application software 10 outputs the data B. The output data B is taken into the message organization task 52 as output data, and is communicated as a message to the node 2 by the network message sending task 55, so that the network message receiving task 56 in the task control router 5 of the node 2 is received. Sent to
After being sorted by the message sorting task 52 in the node 2 and once stored in the message queue, it is taken out by the application launching task, and the data B is passed to the application software 6 that requested the data, and the final result Z is obtained. .

Next, the operation of the above network system will be described in more detail with reference to a flow chart.

FIG. 3 is a flow chart for explaining the message organization task. The message organizing task 52 takes in a message from its own node or the network receiving task 56 in its own node (S1), judges the received message, makes an inquiry to the application task D / B 51 (S2), and requests the data request. Sometimes the task requesting the data and the state of the task, for example, the state of waiting for data input, etc.
B51 is registered, and when the task or message supplying the data requested by this message is the output result data, it is judged whether or not the task at the output destination is in its own node (S3).

When the task supplying the data or the task of the output destination is in its own node, the message queue 53 is exclusively opened (S4), and all the registered messages in the message queue are read from the message queue ( S5), a new message is added, and the order of the messages is exchanged based on the issue time and the priority (S6). Here, the reason why the message queue is exclusively opened is to prevent the message queue 53 from being opened when the message queue 53 is opened by another function. Then, the messages whose order has been changed are written in the message queue 53 (S7), and the message queue 53 is closed (S7).
8).

On the other hand, if the task supplying the data or the task of the output destination is in the other node 3, the message is transferred to the network message transmitting task 55 (S9).

Next, the operation of the application activation task 54 will be described with reference to the flow chart shown in FIG.
The application activation task 54 monitors the CPU load factor, and while maintaining a constant waiting (S10) time, the application load task 54 uses the CPU load value function built into the normal OS to C
The load factor of PU is taken in (S11), and it is judged whether the CPU load is overload or normal load (S12),
If it is overloaded, the process returns to the standby (S10). If it is not normal, the message queue 53 is exclusively opened (S10).
13), the top message is extracted from the message queue 53, and the message is issued to the application software (S14). At this time, if the retrieved message is a data request, the application software in the own node that is outputting the data is started, and if it is output data from another application software, the output data is output. Issue the data to the requested application software. After that, the remaining messages are moved to the front (S15) and the message queue is closed (S16).

Next, the operation of the send network message task 55 will be described with reference to the flow chart shown in FIG. The network message transmission task 55 fetches a message addressed to another node from the message organization task 52 (S30), and determines the task information of the message transfer destination from the application task D / B, for example, the application software of the data request destination or the output destination. Information such as whether or not the node is present is taken out (S31), and this information and the taken-in message are packetized and sent to the network line 1.

Next, the operation of the network message reception task 56 will be described with reference to the flowchart shown in FIG. The network message reception task 56 first reads in advance task information such as the processing function of the application software in its own node and input / output data from the application task D / B. Then, the information of the packet flowing through the network line is fetched (S21), and it is judged whether or not the packet is related to the own node (S22). If NO, the process jumps to the end point of the processing loop and the processing loop is executed again. Return to packet reading from the start point. On the other hand, if it is addressed to its own node (YES in S22)
In the case of), only the message is extracted from the captured packet and issued to the message organizing task 52 (S2).
3).

As described above, in the network system of the present invention, the task in the processing of the application software in each node is passed as a message by the task control router in each node. Even if the nodes and the OSs in the nodes are different by being shared in the network, it is possible to communicate without having control means having different communication specifications for each node.
Application software on other nodes can be executed. Although the number of computer nodes connected to the network line is two in the above-described embodiment, more computer nodes can be connected.

[0039]

As described above, according to the network system of the present invention, task management is performed only by passing messages in all the nodes connected to the network under the network environment. A task including an object-oriented application software group, a storage means for storing information on which node each application software in all nodes connected to the network exists, and priority information By changing the order of the management messages according to the priority information and having a task control router with a queue structure that waits and sends an activation message according to the load of the arithmetic unit of each node, The application software of Force relationship, since only message passing between tasks control router, once the message interface of the task control router constant, it is possible to put together a network system regardless of the hardware model.

[Brief description of drawings]

FIG. 1 is a diagram illustrating an embodiment of a network system according to the present invention.

FIG. 2 is a diagram illustrating a structure of a task control router of an embodiment of a network system according to the present invention.

FIG. 3 is a flowchart for explaining the operation of a message organizing task inside a task control router of an embodiment of a network system according to the present invention.

FIG. 4 is a flow chart for explaining the operation of an application activation task inside a task control router of an embodiment of a network system according to the present invention.

FIG. 5 is a flowchart for explaining an operation of a network message transmission task inside a task control router of an embodiment of a network system according to the present invention.

FIG. 6 is a flow chart for explaining the operation of a network message receiving task inside a task control router of an embodiment of a network system according to the present invention.

FIG. 7 is a diagram illustrating a conventional network system.

[Explanation of symbols]

1 ... Network line, 2, 3 ... Computer node, 4, 8 ... Operating system,
5, 9 ... Task control router, 5, 7, 1
0, 11 ... Application software, 51 ... Application task D / B, 52 ... Message organization task,
53 ... Message queue, 54 ... Application starting task, 55 ... Network message sending task, 56 ... Network message sending task.

Claims (1)

[Claims] 1. In a network system in which a plurality of information processing devices are connected by communication lines, an information processing means for performing information processing in the information processing device, and a task control router for managing tasks of the information processing means. The task control router has a storage unit for storing information on which information processing unit connected to the network system the information processing unit is, and a message including priority information for the priority control. Message rearranging means for rearranging the order according to the order information, message storing means for storing the rearranged messages, and message issuing for waiting and transmitting a message for processing execution according to the load of the arithmetic unit in the information processing apparatus Means and
A network system comprising message sending and receiving means for sending and receiving the message through a communication line.