JPS58151663A - Switching system of system file - Google Patents

Abstract

PURPOSE:To realize complete or semi-unattended processing, by preparing the loading of a new system file to a file and the updating of the file, in the course of operation of a system, and executing re-rise of an updated file by a control electronic computer, etc. CONSTITUTION:In addition to a magnetic disk device DK1 for storing an in- operation file, a magnetic disk device DK2 for a saved surface is provided. When switching a system file, the in-operation file is stored in the device DK2 from the device DK1 by a program instruction, and non-resident control to a main storing circuit M of the system is switched to the device DK2 from the device DK1. Also, current file information and a load path of the following initial program loading IPL are changed to the device DK2. Subsequently, a new file is stored in the device DK1, and after that, to execute IPL to the circuit M from the device DK1, and the current file information and the IPL load path are also changed to the device DK1 to start the regular operation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a system program file switching method for a remotely controlled computer system (referred to as a virtual remote processor).

The operations of the system controlled by the conbeater are commanded and executed by programs, and when functions are added or removed from the system, the system program files (abbreviated as system files) are also changed. Conventionally, in order to switch system files, the system operation is temporarily interrupted, the operator loads the new program onto the disk through the panel, and then performs an IPL (initial program) from the disk to the memory (main memory) of the remote processor.
program loading). This has the problem of not only interrupting operation but also requiring human labor, and does not follow the trend toward labor-saving and unmanned systems.

The present invention eliminates operation interruptions and panel IPLs, allows programmatic switching of one program file to another while the system is running, and allows long-term continuous operation of remote processors.
The aim is to provide a method that enables completely or semi-unmanned operation. That is, the present invention provides a system program file switching method for a remotely controlled computer system, in which a second storage medium is provided in addition to the first storage medium for storing files during operation in the system, and the system program files are changed over. During switching, the command stores the running file from the first storage medium to the second storage medium, switches the non-resident control of the main memory of the system from the former to the latter, and stores the current file information and the next IPL load path. is changed to the latter, a new file is stored in the first recording medium in this state, and then the initial program loading, current file information, and next IPL loading route are also changed from the first recording medium to the main memory. This is characterized by changing to the first recording medium and entering normal operation, which will be described in detail below with reference to the drawings.

FIG. 1 shows a hardware image of a combiner control system to which the present invention is applied. RP is a remote processor and is a processor unit PU.

Console C8L (sometimes not present), magnetic tape unit MT (sometimes not present), magnetic disk unit DK, , DK,, DK3 (sometimes not present)
It is equipped with When the program governing system operation is improved (generation updated), the built-in program of the remote processor PTJ is switched to the new program, but conventionally this work has been performed by an operator using the console C8L after interrupting operation. The present invention attempts to carry out this process in a complete or heavy-duty manner without interrupting the operation, using the operator substitute program POST in the following manner.

To explain this with reference to FIG. 2, (a) shows the IPL operation, in which the power is turned on by the operator, the operator, and the user. Of course, the power may be turned on by a command from the control electronic computer system. ), the program stored on the disk DK is input into the main\memory M of the PU by panel operation. The destination (current file information) of the program input to memory M is provided in the table (
(not shown). When restarting after the system goes down, the system program will automatically update the IP address using the program.
It is necessary to perform IPL using a function that allows L instructions. This means that when a problem occurs during system operation, instead of unconditionally stopping operation, the system will automatically restart and receive instructions on how to continue operation.

Information about the IPL load path, i.e., IPL from DKm, is registered in an external register (not shown) that is not cleared even when the system is reset. In addition, disk DK,
is now idle, and disk DK, (spare side) always has the same contents as disk DK1. Tsumugi: This system example uses a dual system to improve stability (if you do not use a dual system, use D
K does not exist). (b) shows normal operation. The resident part of the memo IJM contains IPLed programs, but the non-resident part is loaded with necessary programs each time by reading them from the disk DKl. This non-resident control is performed based on the current file information in the table.

(e) shows the first step of switching the system program file, and in this switching, the holding plane is first created as shown in the figure. In other words, while performing non-resident control (loading) from the disk DK to the memory M, the disk DK
, or copy the contents of DK to DK. This is the current use surface (DKI).

Simplicity of control during operation on reserve side (DK8) and preservation side (DKz) fi, DKl, DK2. DK,
This is to use the disks in a fixed manner without changing the control information (information necessary for performing preliminary surface control during IPL, etc.) held on each disk.

Next, input the system file switching command to switch files. Commands are input from the console in the case of semi-unmanned operation, and transmitted from the control computer system in the case of completely unmanned operation. File switching is as shown in (d).
The storage area of the disk DK, which is called the surface, is readable as an oven), and Z@DK, which is called the X surface, is replaced by DKl, which is called the X surface.
performs non-resident control over the memo IJM. The current file information in the table is changed to two pages. Also, the next IPL load path registered in the external register is changed to 2nd side, and the X side file is closed.

FIG. 3 is a flowchart showing the procedure for this switching process. After switching files, start creating a new file.

(,) is the closed disk DK in this state.

Load the new file to DK3. In this example, the new file ID: i is in the tape, and this is done by writing it to I)K, , DK, while removing the space. The magnetic tape is attached to the MT manually, so it cannot be fully automated, but it is possible to attach the magnetic tape to the MT on the shore.
Just know! 2) Since the subsequent processing is carried out by a program, it can be done by an amateur and does not require an expert. In addition, the new file is transmitted from the control computer system to the remote processor via the communication line, and this is sent to the DK,
, DK, in which case complete automation is possible.

During this time, non-resident control is performed from two locations. After that, switching to the new file is performed, as shown in (f),
Specifying the X plane and inputting an IPL instruction command (conventionally, manual operation from the panel) is performed, and after the system is shut down, IPL is performed from the X plane. IPLed load path to the external register In this example, DKl is omitted, current file information (X side) is written to the table, and normal operation begins thereafter.

As explained above, in the present invention, a running display is provided in the system running file (the current file ff in the table
N) If it becomes necessary to access a system file while the system is running, refer to the display to enable access to the file indicated by the display. When switching, first create a holding surface, and then select the switch destination. After oven processing the system file (storage side), change the running display to the switching destination system file, close the system file that was running, load the new file to the storage medium of the closed system file, and Non-resident control is performed from a time saving perspective, IPL is performed from the recording medium and normal operation is started, and these switching processes are instructed by commands. Therefore, the system operation is not interrupted except during IPL operation of a new file, and continuous operation is possible, and completely or semi-unmanned processing is possible. Since the closed old file storage recording medium corresponds to the inactive disk DK in Figure 2 (,), it is possible to update to a new file using the same operation using this, or specify the storage surface. It is also possible to return to the old file by inputting an IPL instruction command. In the conventional system file switching method, system operation is interrupted and disk DK1 is
It is necessary to load a new file to the disk DK1, then perform an IPL from the disk DK1, and start operation, which requires manpower and requires a long interruption time. In this regard, in the present invention, it is possible to load a new system file and prepare for updating files while the system continues to operate. Restarting using the update file can be instructed by inputting a command from the control computer system or console. Note that if the Pu'er system is not adopted, the above method can be applied by omitting the processing for DI(3).

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a computer control system to which the present invention is applied, FIG. 2 is an explanatory diagram showing the switching procedure of the present invention, and FIG. 6 is a flowchart showing processing when switching files. DK, , DK is the first recording medium, DK is the second recording medium, and IPL is the initial program loading. Applicant Fujitsu Limited (and 3 others) Representative patent attorney
Aoyagi Minoru 1 RP 11. ' Continuation of Figure 2, Page 1 of Diagram 2 of Suspension 2 Applicant: NEC Corporation, 5-33-1 Shiba, Minato-ku, Tokyo (Applicant: Hitachi, Ltd., 5-1 Marunouchi, Chiyoda-ku, Tokyo) No.-40:

Claims (1)

[Claims] In a method for switching system program files of a remotely controlled computer system, in addition to a first recording medium for storing files during operation in the system, a second recording medium for storage is used.
A recording medium is provided, and when switching the system file, the running file is stored from the first recording medium to the second recording medium by a command, and the non-resident control for the main memory of the system is switched from the former to the latter, The current file information and the next IPL load path are also changed to the latter, the new file is stored in the first recording medium in this state, and then the first
A system file switching method characterized in that the initial program is loaded from the first recording medium to the main memory, the current file information and the next IPL load route are also changed to the first recording medium, and normal operation is started.