JPH0480415B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bypass output method for transmitting data to a terminal when data is transmitted from an information processing subsystem to a terminal device.

[Conventional technology]

Conventionally, this type of output method for transmitting data to a terminal involves notifying the transmitting means from the information processing subsystem to transmit the data to the destination terminal device;
This was realized by the sending means that received the notification sending data to the terminal device.

[Problem that the invention seeks to solve]

In the above-mentioned conventional method for outputting transmission data to a terminal, the terminal device that is the destination of the data transmission is specified, so if the terminal device becomes unable to receive the transmission data due to a terminal device failure etc. at the time of data transmission. If the data is lost, the transmitting means has to wait until the terminal device recovers to a state in which it can receive the transmitted data, and then has to retransmit the data again.

[Means for Solving the Problems] In the detour output method for sending data to a terminal according to the present invention, a conventional information processing system capable of transmitting data from an information processing subsystem operating on a host computer to a terminal device is used. In addition to the subsystem, there is provided a terminal management table means for holding information indicating the master-slave relationship between the terminal devices and information indicating the connection state between the terminal device and the host computer; master-slave relationship recording means for registering, deleting, or referencing in the terminal management table means; terminal status recording means for registering or referring to the terminal management table means for information indicating the connection state between the terminal device and the host computer; and the terminal management table. selection means for selecting a terminal device in a master relationship of the terminal device to which the data is to be transmitted by referring to information indicating a master-slave relationship between terminal devices held in the means by the master-slave relationship recording means; When the terminal status recording means refers to information indicating the connection status between the terminal device to which the data is to be sent and the host computer, which is held in the management table means, and the terminal device is in a state in which data cannot be received. a detour means for notifying a sending means to transmit a message to a terminal device in a master relationship of the terminal device selected by the selection means; A transmission means for transmitting a message to a certain terminal device, and information indicating a master-slave relationship between the terminal devices held in the terminal management table means according to instructions from an operator, dynamically changed using the master-slave relationship storage means. and a changing means.

〔Example〕

Next, the present invention will be explained using the drawings.

Referring to FIG. 1, an online information processing system according to an embodiment of the present invention includes terminal devices 12, 1
3, 14, information processing subsystem 2, terminal management table 3, master-slave relationship recording means 4, changing means 5,
terminal status recording means 6, detour means 7, selection means 8,
and a host computer 1 having transmitting means 9
It is composed of 0.

Next, the processing by the detour means 7 and the selection means 8 will be explained with reference to FIG. 1, FIG. 2, and FIG. 3, respectively.

Referring to FIGS. 1 and 2, the detour means 7
In step 21, data transmission processing to the transmission destination terminal device is started in response to a notification from the information processing subsystem 2. Next, in step 22, the terminal status recording means 6 is instructed to refer to information indicating the connection relationship between the destination terminal and the host computer 10, which is held in the terminal management table 3.
Then, in step 23, the information is received from the terminal status recording means 6, and in step 24, based on the information, the transmission destination terminal and the host computer 10 are
Determine the connection relationship with the
Proceed to step 30, and if not connected, proceed to step 25.
In step 25, the detour means 7 instructs the selection means 8 to select the main terminal device of the transmission destination terminal device. Next, in step 26, the selection result is received from the selection means 8, and in step 27, based on the selection result, it is determined whether or not there is a main terminal device of the transmission destination terminal device. If there is no main terminal device, step 28
If there is a main terminal device, proceed to step 29.
In step 28, the transmission process to the transmission destination terminal device is determined to be a failure, and in step 29, the terminal device to be the transmission destination is changed from the terminal device notified by the information processing subsystem 2 to the main terminal device. step 30
Then, the transmitting means 9 is instructed to transmit data to the destination terminal device, and in step 31, the processing as the detouring means 7 is terminated.

Referring to FIG.
In step 41, the selection process of the main terminal device of the transmission destination terminal device is started in accordance with the instruction from the detour means 7, and the process proceeds to step 42.
Then, the management information of the terminal device is read from the terminal management table 3.

The structure of management information, which is a component of the terminal management table 3 at this time, is shown in FIG. 51 is key information indicating which terminal device the management information belongs to, and 52 is information indicating the connection relationship between the host computer and the terminal device. 53 is information indicating whether the terminal device is a main terminal device or a slave terminal device, 54 is information indicating the main terminal device of the terminal device, and 55 is information indicating the slave terminal device of the terminal device. If the corresponding main terminal device or slave terminal device does not exist, information indicating that the corresponding terminal device does not exist is stored in 54 and 55.
At this time, in step 43, it is determined based on the management information 54 whether the main terminal device is designated as the transmission destination terminal. If specified, proceed to step 44; if not specified, proceed to step 47. In step 44, the terminal management table 3 is searched using the information indicating the main terminal obtained in step 43 as a key, and the management information of the main terminal is retrieved. In step 45, the connection status between the terminal device and the host computer is checked using the management information 52, the attributes of the main terminal are checked using the management information 53, and the slave terminal device is checked using the management information 55. Determine whether it can be used as a detour output destination. If it is available, proceed to step 46; if not, proceed to step 47. In step 46, information indicating the searched main terminal device is output, and in step 47, information indicating that the main terminal device does not exist is output.
Then, in step 48, the processing as the selection means 8 is completed.

Next, the overall operation of this embodiment will be specifically explained.

Referring to FIG. 1, when an attempt is made to send data from the information processing subsystem 2 to the terminal device 13 in the online information processing system 11, the terminal device 13 is unable to receive the transmitted data. The present invention will be explained by taking as an example the detour output processing of transmission data to the terminal device 12.

It is assumed that information indicating a master-slave relationship between the terminal device 12 and the terminal device 13 is registered in the terminal management table 3. This information includes information indicating the terminal device (hereinafter referred to as the main terminal device) to which the terminal device 12 is to output the transmission data in a detour that the terminal device 12 attempts to output to another terminal device, and information in which the terminal device 13 outputs the transmission data in a detour manner. It consists of information indicating a terminal device (hereinafter referred to as a terminal device) having the main terminal device 12. Information indicating this master-slave relationship can be registered in the terminal management table 3 as definition information when the online information processing system is generated.

Furthermore, in a system in which information indicating a different master-slave relationship in which the slave terminal device of the main terminal device 12 is the terminal device 14 is held in the terminal management table 3 as definition information at the time of online information processing system generation, the system is in operation. Even if the operator is using the terminal device 14 as the slave terminal device of the main terminal device 12,
The changing means 5 is instructed to delete the information indicating the master-slave relationship, and the changing means 5 receiving the instruction instructs the master-slave relationship recording means 4 to delete the information. The master-slave relationship recording means 4 that received the instruction is the terminal management table 3
The operator deletes the information held in the change means 5 and then changes the registration of information indicating a master-slave relationship in which the slave terminal device of the master terminal device 12 is the terminal device 13.
Instruct to. The changing means 5 that received the instruction instructs the master-slave relationship recording means 4 to register the information, and the master-slave relationship recording means 4 that received the instruction registers the information in the terminal management table 3, thereby establishing the master-slave relationship between terminal devices. You can change the information shown. Thereafter, information indicating the master-slave relationship between terminal devices continues to be held on the terminal management table 3 until a change is instructed by the operator again.

It is assumed that the terminal device 12 and the host computer 10 are in a connection relationship, and that the connection relationship between the terminal device 13 and the host computer 10 is lost.
Information indicating the connection relationship between the terminal device and the host computer is held in the terminal management table 3, and is updated by the terminal state recording means 6 every time the connection state between the terminal device and the host computer changes.

In this situation, the information processing subsystem 2 notifies the detour means 7 to send the data to the terminal device 13, and the detour means 7 that received the notification sends the data to the terminal status recording means 6 and stores it in the terminal management table 3. An instruction is given to refer to information indicating the connection relationship between the terminal device 13 and the host computer. Upon receiving this instruction, the terminal status recording means 6 refers to the information held in the terminal management table 3 and sends information to the detouring means 7 that "the connection relationship between the terminal device 13 and the host computer has been lost". return. The detour means 7 returns information that "the connection relationship between the terminal device 13 and the host computer is lost" from the terminal status recording means 6 to the selection means 8 to the terminal device 13.
After receiving the notification, the selecting means 8 instructs the master-slave relationship recording means 4 to refer to the information indicating the master-slave relationship of the terminal device 13. Having received this instruction, the master-slave relationship recording means 4 uses the terminal device 13 held in the terminal management table 3.
Terminal device 13
The selection means 8 receives the information that the main terminal device is the terminal device 12, and the selection means 8 receives the notification.
is the terminal device 12 as the main terminal device of the terminal device 13.
is selected and notified to the detour means 8. The detour means 8 that has received the notification notifies the transmission means 9 to transmit the transmission data to the terminal device 12, and the transmission means 9 that has received the notification transmits the data to the terminal device 12.

〔Effect of the invention〕

As explained above, the present invention has the following effects when transmitting data from an information processing subsystem to a terminal device.

That is, even if the terminal device that is the destination of the data transmission becomes unable to receive the transmitted data, the transmitted data can be output in a detour manner to the main terminal device, thereby increasing the efficiency of data output.

Further, since the change of the terminal device to be the destination of the transmission due to the detour output of the transmission data is automatically performed, there is no need for operator intervention, and therefore the operation is simple.

Furthermore, since the information indicating the master-slave relationship between terminal devices can be dynamically changed even while the system is running, the combination of terminal devices that perform detour output of transmitted data can also be dynamically changed while the system is running, giving flexibility in the configuration of terminal devices. Can be adapted to.

[Brief explanation of drawings]

FIG. 1 is a diagram showing one embodiment of the present invention, FIG. 2 is a flowchart showing processing of the detour means, and FIG.
FIG. 4 is a flowchart showing the processing of the selection means, and FIG. 4 is a diagram showing the structure of the terminal management table. 1 to 4, 12, 13, 14... terminal device, 12... information processing subsystem, 3... terminal management table, 4
... Master-slave relationship recording means, 5... Changing means, 6...
Terminal status recording means, 7...Detour means, 8...Selection means, 9...Transmission means, 10...Host computer, 11...Online information processing system.

Claims (1)

[Claims] 1. In an online information processing system in which data is transmitted from an information processing subsystem operating on a host computer to a terminal device, information indicating a master-slave relationship between the terminal devices and a connection between the terminal device and the host computer are provided. terminal management table means for holding information indicating the status; master-slave relationship recording means for registering, deleting, or referencing information indicating the master-slave relationship between the terminal devices in the terminal management table means; and between the terminal device and the host computer. Terminal status recording means for registering or referencing information indicating a connection state in the terminal management table means; and information indicating a master-slave relationship between terminal devices held in the terminal management table means for referencing by the master-slave relationship recording means. a selection means for selecting a terminal device having a master relationship with the terminal device to which the data is to be transmitted, and a connection state between the terminal device to be the data to be transmitted and the host computer held in the terminal management table means; The terminal status recording means refers to information indicating the terminal status, and when the terminal status is such that data cannot be received, a message is sent to the terminal apparatus selected by the selection means and having a master relationship with the terminal apparatus. a detour means for notifying the transmitting means of the message; a transmitting means for transmitting a message to a terminal device in a master relationship of the terminal device notified by the detour means; and a message held in the terminal management table means according to instructions from an operator. 1. A detour output method for sending data to a terminal, comprising: a change means for dynamically changing information indicating a master-slave relationship between terminal devices, using the master-slave relationship storage means, on a host computer.