JP2601513B2 - Dynamic change processing method of communication path multiplicity - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] The present invention relates to a dynamic change method of communication path multiplicity in which the multiplicity of communication paths used for conversation between application programs across systems is dynamically changed during operation. The purpose of the present invention is to provide a means for automatically controlling the number of communication paths of a system to an optimal number and improving the use efficiency of the main memory. Communication path dynamic establishment processing means to be established
A communication path management processing means for keeping a dynamically established communication path in a reusable state without releasing it immediately after use, and a predetermined amount of a free communication path when communication multiplicity is reduced. Communication path dynamic release processing means for releasing other dynamically established idle communication paths, and automatically increasing or decreasing the number of communication paths in accordance with the traffic.

[Industrial applications]

The present invention relates to a dynamic change method of communication path multiplicity in which the multiplicity of communication paths used for conversation between application programs across systems is dynamically changed during operation.

[Conventional technology]

When communication is performed between application programs, a series of processes performed between the application programs is called a conversation. In order to have a conversation between application programs spanning between systems, it is necessary to transmit and receive data between the systems. The logical communication path used for this is called a communication path. One conversation occupies one communication path.

In the conventional method, a necessary number of communication paths are established and prepared at the start of operation, and when a conversation starts, an empty communication path is allocated to the conversation. When the conversation ends, the communication path is separated from the conversation and managed as an empty state.

[Problems to be solved by the invention]

Conventionally, the number of communication paths established and prepared at the start of operation has been defined in advance by the user as a system constant in consideration of the multiplicity of communication. Therefore, there were the following problems.

(A) It is difficult for the user to design the system. Since the multiplicity of communication greatly fluctuates depending on the day and time, it is difficult to predict the required number in advance. Therefore, a communication path is often prepared more than necessary with a margin.

(B) In order to keep the communication path having the maximum number of communication multiplexes available at all times, a large storage area for the management information is required, and the use efficiency of the memory deteriorates. Especially,
Since this storage area is provided in the system common area, if the memory is squeezed, the effect is large.

(C) If a communication path is established more than necessary at the start of operation, communication costs between systems for establishing the communication path increase, and wasteful costs increase.

(D) If the number of communication paths established at the start of operation is small and the number of communication multiplexes increases during operation, and there are not enough available communication paths, a new conversation processing request is rejected or a new communication processing request is issued. Waiting until a free space is available, processing is stalled.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide means for automatically controlling the number of communication paths of the system to an optimum number and improving the use efficiency of the main memory.

[Means for solving the problem]

 FIG. 1 shows a configuration example of the present invention.

In FIG. 1, reference numeral 10 denotes a processing unit including a CPU and a memory, 11 denotes a communication path control unit which controls establishment / release of a communication path and manages the availability of the communication path, and 12 manages the communication path. A communication path management processing unit for processing allocation and release requests, 13 is a busy queue for managing a communication path in use, 14 is a free queue for managing an idle communication path, and 15 is a communication path management processing unit 12. A communication path dynamic establishment processing unit for dynamically establishing a communication path in response to a request, and a communication path dynamic release processing unit 16 for dynamically releasing a communication path in response to a request from the communication path management processing unit 12 Reference numeral 17 denotes a transmission / reception control unit for performing data transmission / reception processing using the established communication path, reference numeral 18 denotes a conversation control unit for controlling conversation between application programs, and reference numeral 19 denotes an application processing unit for executing the application programs.

C1, C2,..., C4,... In the busy queue 13 and the free queue 14 managed by the communication path management processing unit 12 are communication path control blocks that store management information relating to established communication paths. The transmission / reception control unit 17, the conversation control unit 18, and the application processing unit 19 are configured in the same manner as in the related art.

The communication path dynamic establishment processing unit 15 increases the communication multiplicity,
When the communication path is insufficient, a process for dynamically establishing a communication path is performed in response to a request from the communication path management processing unit 12.

At the end of the conversation, the communication path management processing unit 12 reuses the communication path used in the conversation without immediately releasing the communication path when a request for deallocation of the dynamically established communication path is made. Keep it ready. That is, a communication path control block for managing the communication path is queued in the free queue 14.

When the communication multiplicity decreases, the communication path dynamic release processing unit 16 leaves a predetermined amount of free communication paths managed by the free queue 14 and other dynamically established free communication paths. Perform processing to release.

Thus, in the present invention, the number of communication paths is automatically increased or decreased according to the traffic.

[Action]

 The operation of each processing unit shown in FIG. 1 is as follows.

The conversation control unit 18 notifies the transmission / reception control unit 17 of the start of the conversation.

The transmission / reception control unit 17 requests the communication path management processing unit 12 to allocate a communication path used for conversation.

The communication path management processing unit 12 checks the free queue 14 in response to the communication path allocation request, and allocates a free communication path. If there is no free communication path, the communication path dynamic establishment processing unit 15 is requested to dynamically establish a communication path. The communication path dynamic establishment processing unit 15 communicates with the partner system,
The communication path is dynamically established.

 The transmission / reception control unit 17 is notified of the allocated communication path.

The transmission / reception control unit 17 transmits / receives conversation data using the allocated communication path.

When the conversation ends, the conversation control unit 18 performs the end processing.

The transmission / reception control unit 17 requests the communication path management processing unit 12 to release the assignment of the communication path used for the conversation.

The communication path management processing unit 12 places the communication path in a free queue.
Return to 14. At this time, if the number of unused communication paths becomes equal to or more than a predetermined amount, the communication path dynamic release processing unit 16 is requested to release the dynamically established communication paths. The communication path dynamic release processing unit 16 releases a dynamically established communication path by communicating with the partner system.

With the above processing, it is not necessary to establish a communication path that may be wasted before starting operation.

〔Example〕

FIG. 2 is a diagram showing an example of dynamically changing a communication path according to an embodiment of the present invention, and FIG.

In FIG. 2, S1 and S2 are systems for mutual communication, P
1 to P12 and Q1 to Q12 represent processing by an application program for conversation. .. Represent communication paths fixedly established at the start of operation, and 111, 112,... Represent communication paths dynamically established / released at the time of operation.

In the present invention, as shown in FIG. 2, at the start of operation, a user establishes a predetermined number (for example, 10) of communication paths and leaves them in a usable state.

After the operation is started, when there is a conversation request between process P1 and process Q1, a conversation request between process P2 and process Q2,..., A conversation request between process P10 and process Q10, communication paths 101, 102,.
Are assigned sequentially.

Next, when there is a conversation request between the process P11 and the process Q11 and the multiplicity of the process becomes 11 or more, a usable communication path runs short. Therefore, a new communication path 111 is dynamically established and allocated. Subsequently, when a conversation request between the process P12 and the process Q12 is made, the communication path 112 is similarly dynamically established and allocated.

, Which are dynamically established during operation, are dynamically released when the multiplicity of processing decreases and the number of available communication paths exceeds a predetermined amount.

FIG. 3 shows an example of processing by the communication path management processing unit 12 shown in FIG.

When there is a communication path allocation request to the communication path management processing unit 12 at the start of a conversation, the processing shown in FIG.
Execute

First, the free queue 14 checks whether there is an available communication path that can be allocated. If there is no free communication path, control is transferred to the processing.

The communication path control block in the free queue 14 is connected to the busy queue 13.

The communication path is notified to the allocation request source, and the processing for the allocation request is terminated.

If there is no free communication path, the communication path dynamic establishment processing unit 15 shown in FIG. 1 is requested to perform the communication path dynamic establishment processing.
The communication path establishment processing in the communication path dynamic establishment processing unit 15 is the same as the conventional communication path establishment processing at the start of operation.

When a communication path is dynamically established, management information such as a path ID is set in a communication path control block and connected to the free queue 14. After that, the following processing is executed.

When the communication path management processing unit 12 receives a request to cancel the assignment of the communication path at the end of the conversation, the processing shown in FIG.

The communication path control block of the communication path to be released is removed from the busy queue 13 and connected to the free queue 14.

It is determined whether the number of available communication paths has exceeded a predetermined amount. If not, the process ends. The reference value to be compared may be an absolute quantity or an amount indicating the percentage of empty state.

When the number of available communication paths exceeds a predetermined amount, the communication path dynamic release processing unit 16 shown in FIG. Request dynamic release processing. The communication path release processing in the communication path dynamic release processing unit 16 is the same as the conventional communication path release processing at the end of operation.

The communication path control block relating to the dynamically released communication path is deleted from the free queue 14, and the process is terminated.

〔The invention's effect〕

As described above, according to the present invention, there is no need for the user to be aware of the number of communication paths, and system design is facilitated. When an empty communication path runs short, a request for a new conversation is not rejected, and there is no need to wait until a communication path becomes available. Since the system automatically controls the communication paths to the optimal number at all times, it is possible to prevent a situation where an area for managing the communication paths is secured more than necessary. Therefore, the use efficiency of the main memory is improved. In particular, when there are a plurality of communication partner systems, it is necessary to manage the communication path for each system, so that the effect of the present invention that can prevent waste of the communication path is great.

[Brief description of the drawings]

FIG. 1 is a configuration example of the present invention, FIG. 2 is a dynamic change example of a communication path according to an embodiment of the present invention, and FIG. In the figure, 10 is a processing device, 11 is a communication path control unit, 12 is a communication path management processing unit, 13 is a busy queue, 14 is a free queue, 15 is a communication path dynamic establishment processing unit, and 16 is a communication path dynamic release process. Department,
Reference numeral 17 denotes a transmission / reception control unit, 18 denotes a conversation control unit, and 19 denotes an application processing unit.

Claims (1)

(57) [Claims] In a processing system for transmitting and receiving data via a communication path which is an established logical communication path, when the communication multiplicity increases and the communication path becomes insufficient, the communication path is dynamically changed. Communication path dynamic establishment processing means to be established (15)
A communication path management processing means (12) for keeping a dynamically established communication path in a reusable state without releasing it immediately after use, and an idle communication path when the communication multiplicity is reduced. Communication path dynamic release processing means (16) for leaving a predetermined amount of paths and releasing other dynamically established vacant communication paths, and automatically counts the number of communication paths according to the traffic. A dynamic change processing method of a communication path multiplicity characterized by increasing or decreasing.