JPS58169623A - Program loading system of communication control processor - Google Patents

Abstract

PURPOSE:To ensure an automatic countermeasure when a system has a fault, by deciding the state of the corresponding computer by means of a communication controller and then reporting the state of the computer to other computers so that a control program for reaction is supported when the system has a breakdown. CONSTITUTION:A diagnosing circuit 17 of a communication controller transmits a diagnosing signal to a computer for each set time of a timer 18. The computer sends back a delay signal if it is in a normal state. The circuit 17 monitors the delay signal and sets a state register when no answer is received. A breakdown deciding circuit 19 decides a breakdown and gives an interruption to a processing part 12 via an interruption reception register 21. The part 12 informs the breakdown of the corresponding computer to other constitution system which works normally through circuits via a transmitting part 11. Then the part 12 requires the supply of a control program from another computer to cope with the breakdown and performs a countermeasure process based on the control program.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of the Invention The present invention relates to a program loading method for a communication control processing device in a system between computers connected via a line. This invention relates to a method for maintaining a system by a communication control processing device at 9:00 p.m.

(b) Prior art ``Conventionally, in a system between computers connected via a communication line, a processor connected to a channel of a delay timer (hereinafter referred to as CCP) is under the control of a computer on the channel side, The CCP control program for executing tasks was also supported and loaded on the channel side computer when the system was started up. Therefore, system startup 9
When the system is running and the computer in question is down, the above CCP cannot receive support, so the functions of the CCP will be significantly reduced, and it will not be possible to recognize that the computer is down. System support had to be done by humans (computer operators).

No. 0 Object of the Invention The present invention is based on the above-mentioned background, and the object of the invention is to connect the CCP to the corresponding computer when it goes down in a system where the CCP is in an operational state. The CCP determines the status of the corresponding total SVa, and based on the judgment, reports the current status to the other 111 computers, and also sends the control program for responding to the computer down to other computers that are not down. The purpose of the present invention is to automate the response in the event of system failure by having support through the CCPl on the side, and in order to realize the above purpose, the computing engine connected through the sputum A communication control processing device having a storage section for storing a 4i control program for executing communication control, means for loading the minor control program into the storage section via a channel of a computer, and means for reading it via a line. and a means for determining whether the computer on the channel side is down or in a normal state, a means for notifying the control program of the result when the above determination is down, and a means for transmitting the result to the control program when the above determination returns to the normal state. It has a means of notifying the computer, and when the computer goes down, the control program is loaded from a computer other than the computer via the line, and when the computer is restored, the control program is loaded via the channel. It is to be.

B) Examples of the invention In order to explain the present invention more specifically, examples will be given below.

FIG. 1 is an explanatory diagram of the configuration of a system according to an embodiment of the present invention. In the figure, 1 is a computer, 1m is a channel of the computer, 2 is a communication control processing device <CCP), 2m is a channel adapter section, and 2b is a 2c is a line control and communication control unit; 3 is a line exchange; 4 is another calculation i; 4a is a channel; 5 is another communication f! i control processing unit (CCP), 5
1, 5 be 5 c are respectively 2a, zb, 2c
Processing unit 1 including a channel adapter unit and a storage unit corresponding to
This is a line control and communication control section. In addition, a line switch is required! If the number of computers to be connected is small, it may be directly connected.

In a system with this configuration, the system
Sometimes, when updating the control program, CCP2 or Mori5
With the support of the computer 1 or 4, respectively, a control program is stored in a storage section, and communication control is performed by a transfer control program. It is assumed that a very basic level program such as the startup procedure is stored in advance in each CCP in a non-volatile manner. Also, CCP during normal operation
The work mainly consists of editing the transmitted message into a communication data format, decoding the received message, and requesting the connected computer for processing. FIG. 2 is an explanatory diagram of one embodiment of the present invention, in which C0 in FIG.
This shows the detailed configuration of P2.

In the figure, 10 and 11 are transmission and reception units for the line side, 12 is a processing unit that performs calculations and command control, and 13 and 14
are the sending bias for the computer channel, the receiving section, 15 and 16
indicate a main memory section and a fixed memory section containing basic programs, respectively. In addition, 17 is a diagnostic circuit related to IM diagnosis of the computer's O status, 18 is a timer for setting the diagnosis cycle, 19 and 20 are circuits for determining whether the Daikei computer is down or in a recovery state, and 21
is an interrupt acceptance register for processing w512. Also, thick lines indicate data lines, thin lines indicate control signal lines,
Arrows indicate the direction of transmission. Further, the turtle indicates a diagnostic signal, and b indicates a ready signal. FIG. 3 is an explanatory diagram regarding diagnostic control of the configuration of the embodiment, and shows a time chart of operations. Further, FIG. 4 is an explanatory diagram of the work procedure of one embodiment, and is expressed as a flowchart.

In the configuration of FIG. 2, lθ to 161 are components for normal data processing, and 17 to 20 are provided for diagnosing or monitoring the state of the computer according to the present invention.

First, when considering system start-up, when the power is turned on to the CCP 2 and the F&A procedure is executed according to the basic control procedure in the fixed memory 16, then when the diagnostic circuit 17 is activated, the diagnostic circuit 17 A diagnostic signal is sent to the calculation i side every set time of the timer 18. Then, if the computer is in normal condition, it returns a ready signal. and,
The diagnostic circuit 17 monitors the ready signal, and if there is no response within a predetermined time, the down bit of the status register that stores the down status is set to (0), for example, and the down determination circuit 19 determines whether the status register is up or down. is detected to determine that the computer 1 is down, and an interrupt is sent to the processing unit 12 via the interrupt acceptance register 21. In addition to notifying that the computer is down, it requests the supply of a control program to deal with the downtime from another computer, for example 4, and sends the supplied control program to the main memory via the receiving unit IO. The data is imported into the storage unit 15, and thereafter corresponding processing is performed based on the control program. The diagnostic circuit 17 periodically monitors the status of the subtraction machine 1 at the cycle of the timer 18 even while the CCP 2 is executing processing at the corresponding level, and if the computer 1 is restored and Lady 18 returns. When this occurs, the recovery bit of the status register in the diagnostic circuit 17 is set to (1), for example, and the recovery determination circuit 20 detects the start-down of the status register and determines recovery, and then sends the status register via the interrupt reception register 21. and reports it to the processing unit 12. Then, the processing unit 12 interrupts the computer 1 based on the corpse determination result, and restores the computer 1 via the channel transmission unit 13 and reception unit 14)
A control program for operating the system normally is loaded into the main storage unit 15, and thereafter normal processing is performed based on the control program.

Of course, the same applies if any computer, for example 1, goes down during system operation.

The flowchart in FIG. 4 shows the procedure of the work in the interrupt state of diagnosing the computer described above and replacing the control program based on the diagnosis results.

As explained above, according to the present invention, if a computer is down at system startup or while the system is running,
The CCP connected to the computer in question can immediately detect the status and automatically take action (by replacing the control program), and at the time of recovery, the computer can detect the status and automatically take recovery measures. In the event that a system failure occurs or goes down, the system management situation can be quickly determined and appropriate response processing based on the judgment can be carried out quickly, resulting in the unique effect that damage to system operation can be minimized.

[Brief explanation of drawings]

The first diagram is an explanatory diagram of a system according to an embodiment of the present invention. The second diagram is an explanatory diagram of one embodiment of the present invention. The third diagram is an explanatory diagram of the diagnostic control. The fourth diagram is an explanation of the work procedure. It is a diagram. In the figure, 1 and 4 are computers, 2 and 5 are communication control processing units (c
cp), 12 is a processing unit, 17 is a timer, 18 is a diagnostic circuit, 19 and 20 are down and recovery judgment circuits, 21 is Yo1
]Include reception register, 15 and 16 are memories. Figure 1

Claims (1)

[Claims] a storage unit for storing a control program for executing communication control between computers connected via a line; means for loading a cough control program into the storage unit via a channel in Table 1; In a communication control processing device having a means for loading, means for determining whether the total J machine on the channel side is down or in a normal state, means for notifying the control program of the result when the above-mentioned determination is down, and the above-mentioned determination has a means for notifying the control program of the lees when the computer is restored to a normal state, and when the computer goes down, the control program is loaded from a computer other than the computer via the line,
When the above computer is restored, control log 2 is sent via the channel.
A program loading method for a communication control processing device characterized by loading a program.