JPH0895820A - Method for confirming connection at the time of dynamic system reconstitution - Google Patents

Abstract

PURPOSE: To confirm whether or not dynamic reconstituting operation is correct performed in a short time by executing a device chracteristic command called on the basis of characteristic test information corresponding to a connection device in difference information and deciding whether or not a path is connected. CONSTITUTION: To conduct a characteristic test, a connection confirmation test is conducted by loading a command control word address(CCW address) from characteristic test information 18, matching with device discrimination information of the difference information 17, which consists of a terminal identifier, device discrimination information the CCW address, an expected value of return information. Consequently, if the path between a controller and an input/output device(I/O) is not active, the test completion flag and error flag of the difference information 17 are set. Then it is decided whether or not all paths and device being objects of connection confirmation has been completed by checking the test completion flag of the difference information 17. After this connection confirmation test ended, it is decided whether or not there is an error by checking the error flag of the difference information 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer system connection test method, and more particularly to a computer system that requires non-stop operation, when the system configuration is changed during system operation. The present invention relates to a test method for confirming connection of a system configuration changing unit during system operation without affecting a general job operating under (OS) or an input / output device (I / O).

[0002]

2. Description of the Related Art Conventionally, in this type of computer system, when the system configuration is changed such as the addition of input / output devices (I / O), the system is temporarily stopped and the central processing unit (C
PU) runs a stand-alone test program under the test monitor to test the related devices. Further, the test program operating under the operating system (OS) detects the input / output device (I / O) when the operating system (OS) detects a failure of the input / output device (I / O). ) Is disconnected by the operating system (OS) (OFFLINE)
After that, the test monitor under the operating system (OS) loads the test program for the target input / output device (I / O) from the external storage device (magnetic tape device or magnetic disk device). However, the test was conducted focusing on the function of the input / output device (I / O). As reference examples of the test method during system operation, there are JP-A-5-165669 and JP-A-5-189262.

[0003]

In recent years, computers have been used.
The system requires non-stop and no down, and the central processing unit (C
PU), input / output devices (I / O), communication control devices, and paths connecting these devices can be added and system configuration can be changed, but at the same time,
It was necessary to conduct a connection confirmation test to check whether the connection work of these devices was performed correctly (eliminating the system down caused by a work mistake) before the system was installed and in a short time. However, if you check the connection of the system configuration change section by the conventional test program,
The stand-alone test program or the test program executed by the test monitor under the operating system (OS) is not intended to confirm the connection, but has a function of a specific input / output device (I / O). Since this test was focused on, it was not suitable for checking the connection of each device easily and in a short time.

An object of the present invention is to eliminate the above-mentioned problems, and during dynamic reconfiguration, after completion of equipment expansion work, dynamic expansion is performed before the expansion equipment is logically incorporated into the system. It is to be able to easily and quickly confirm whether or not the configuration work has been correctly performed during system operation before reconfiguration.

[0005]

In order to achieve the above object, the present invention is a computer comprising a plurality of input / output devices (I / O) and one or a plurality of central processing units (CPU). It is a connection confirmation method at the time of dynamic system reconfiguration in a target system, and creates difference information that specifies the connection route, connection device and test method to be subjected to the connection confirmation test from the configuration information before / after the system reconfiguration. Then, the route status confirmation command is executed based on the difference information to determine whether or not the route is connected.When the route is not connected, the test is completed as an error, and when the route is connected, When it is determined whether or not the device identification is necessary based on the difference information, and when the device identification is required, the device identification command is executed, and when the obtained device identification information does not match the connected device in the difference information, the error is detected. -When the test is completed as if there is a match, or when the device identification is unnecessary, it is determined whether a unique test is necessary or not based on the difference information, and when a unique test is required, a unique test corresponding to the connected device in the difference information. The device-specific command called based on the information is executed to determine whether or not the route is connected.When the unique test is not required, the test is completed.When the route is not connected, the test is completed with an error. The test is completed when connected, the error message is output when the test is completed with the error, and the connected device is incorporated into the system by system reconfiguration when the test is completed without the error. . Further, the unique test information is stored and held in a storage device, and the unique test information is maintained, updated or added from a workstation, a remote maintenance console or the like connected via a network.

[0006]

With the above means, it is possible to easily and quickly determine whether or not the connection work has been performed correctly. If there is a connection error, the type of the device, the control device number, the device address, and the route identifier (path ID). For example, it becomes possible to output an error message sufficient to identify the error location.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a computer system to which the present invention is applied.

The operating system (OS) 10 of the computer 1 comprises a part 11 that provides a standard function and a part 12 that provides a dynamic reconfiguration function.
Exists across both functions. The connection confirmation test program 13 that realizes one of the dynamic reconfiguration functions is standardly incorporated in the dynamic reconfiguration function section. The I / O management unit 14 that operates by being activated by the connection confirmation test program 13 is the input / output device 1 that is connected to the general job.
5A (ONLINE state) or additional I / O device 15
It is possible to issue a start-up to both B (OFFLINE state), and has a function to suppress the standard error recovery processing (error message output, dump information output) etc. against the occurrence of an error from the added I / O device. By I
When receiving a failure report from the / O side, check the connection without affecting the running system. Also,
The connection confirmation test program 13 creates the difference information 17 from the configuration information 16 before / after the system configuration change, and identifies the route and the device required for the connection confirmation test and the test method suitable for the connection confirmation of each device. When a device-specific test is required, the information necessary for the unique test is obtained from the unique test information 18. In addition, the unique test information includes work station 19 and remote maintenance console connected by the network.
Maintenance / update / from terminals that are allowed to access
Can be added.

FIG. 2 is a typical example of I / O expansion, and 21 shows a simple expansion, which is an example of expanding the control unit CU and the input / output unit DEV. 22 is a duplication of a route to a device incorporated in the system, that is, CH
This is an example in which the route to 2 is added and the route is duplicated. 23
Is the addition of I / O via the director switch, that is, the addition of CU and DEV. 24 is an additional I / O device under the control device, that is, D is further added to the DEV.
It shows an example of connecting an EV.

FIG. 5 shows a flow chart of the processing of the connection confirmation test program 13 of FIG. Each processing step will be described below. Process step 50:
The connection confirmation test program is activated by a subcommand of the dynamic reconfiguration mechanism of the operating system (OS). Process step 51: Based on the configuration information before / after system reconfiguration, a test completion flag, a test classification flag, an error flag, a CH number, a path ID, a link number, a control device number, a device number, and a device shown in FIG. Difference information including identification information (expected value) is created, and a connection route, a connection device, and a test method to be subjected to the connection confirmation test are specified. When there are a plurality of devices to be additionally connected, the difference information also becomes a plurality. The test classification flag is a flag that indicates a required test, and as a test, a device identification test,
There are device-specific tests. The CH number, path ID, link number, control device number, and device number identify the connection route and connection device that are the target of the connection confirmation test, and are used for error messages. The device identification information has an expected value and a return value, the expected value is the device identification information expected as a result of the device identification test, and the return value is the device identification information actually obtained as a result of the device identification test. Yes, used for test decisions and error messages.

Process step 52: A route state confirmation command is executed in order to confirm whether the route which is the target of the connection confirmation or the route to the device is in the active state (is connected). Process step 53: Determine the execution result of the route status confirmation command. Process step 54: If the result of determination by the route status confirmation command is that the route is inactive (not connected), the test completion flag and error flag of the difference information are set, and the process proceeds to process step 64.

Process step 55: It is judged from the test classification flag of the difference information whether or not a device identification test is required. Process step 56: If device identification is required, a device identification command for identifying the type of connected device is executed, and the device identification information obtained thereby is set as a return value in the difference information. Process step 57: The device identification information (return value) obtained by the device identification command is compared with the device identification information (expected value) preset in the difference information, and whether the expected device is connected or not. To judge. Process step 58: If the determination result of the device identification information does not match the expected value, the test completion flag and the error flag of the difference information are set, and the process proceeds to process step 64.

Process step 59: It is judged from the test classification flag of the difference information whether or not a device-specific test is necessary. The route that can be confirmed by the route state confirmation command is the route to the DEV connected to the control unit CU, and the route state to the DEV further connected to the DEV (case of 24 in FIG. 2) is the route state confirmation command. The route status cannot be confirmed. The device-specific test is a test for confirming a route that cannot be confirmed by the route state confirmation command, that is, a route in the case of DEV to DEV of the case 24 in FIG. Process steps 60, 61: To perform a unique test,
From the unique test information 18 consisting of the terminal identifier, the device identification information, the command control word address (CCW address), and the expected value of the return information shown in FIG. Test information from C
The connection confirmation test is performed by loading the CW address and executing the device-specific command. Process step 62: Determine the execution result of the device-specific command. As a result of the execution of the device-specific command, if the path between the control device and the input / output device (I / O) is active (in the connected state), the process proceeds to the processing step 64. Process step 63: If the path between the control device and the input / output device (I / O) is not active (not connected) as a result of the execution of the device-specific command, the test completion flag and error -Set flags.

Process step 64: It is judged by the test completion flag of the difference information whether or not the test of all the routes and devices to be confirmed for connection has been completed. As a result of the determination, if the test is not completed, the process proceeds to processing step 52. Process step 65: After the connection confirmation test of all the routes and the devices to be confirmed, the presence or absence of an error is determined from the error flag of the difference information. Process step 66: If there is an error, information sufficient for identifying the error location is selected from the error flag contents.
The message is output to the console display and / or the printer device as a message. Process step 67: If the connection confirmation test ends normally (no error), the target device is incorporated into the operating system (OS) (in the ONLINE state). Process step 68: A test end message including connection form information is displayed on the console display and printer device, or
Output to either one.

[0015]

As described above, according to the present invention, at the time of dynamically reconfiguring (changing the system configuration while the system is operating), after completion of the device expansion work, before the expansion device is logically incorporated in the system ( Before the reconfigured system goes live)
Whether or not the dynamic reconfiguration work has been correctly performed can be easily and quickly confirmed during system operation (system before reconfiguration).

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a computer system to which the present invention is applied.

FIG. 2 is a diagram showing a typical additional case of an input / output device (I / O).

FIG. 3 is a diagram showing a format of difference information.

FIG. 4 is a diagram showing a format of unique test information.

FIG. 5 is a diagram showing a flowchart of processing of a connection confirmation test program.

[Explanation of symbols]

 1 Computer 10 OS 11 Standard Function 12 Dynamic Reconfiguration Function 13 Connection Confirmation Test Program 14 I / O Management Unit 15A, 15B I / O 16 Configuration Information 17 Difference Information 18 Unique Test Information 19 Workstation 20 Remote Maintenance Console

Claims (2)

[Claims] 1. A connection confirmation method at the time of dynamic system reconfiguration in a computer system including a plurality of input / output devices (I / O) and one or a plurality of central processing units (CPU). Therefore, from the configuration information before / after system reconfiguration, create difference information that specifies the connection route, connection device, and test method to be subjected to the connection confirmation test, and execute the route status confirmation command based on the difference information. ,
It is determined whether or not the route is connected. When the route is not connected, the test is completed with an error. When the route is connected, it is determined whether or not the device identification is necessary based on the difference information. When identification is required, a device identification command is executed, and when the obtained device identification information and the connection device in the difference information do not match, the test is completed as an error, and when they match or when the device identification is unnecessary, the Whether the unique test is necessary or not is determined based on the difference information, and when the unique test is required, the device unique command called based on the unique test information corresponding to the connected device in the difference information is executed to determine whether the route is connected. Judged, if the unique test is not required, the test is completed.If the route is not connected, the test is completed with an error and the route is connected. When the test is completed with the error, an error message is output when the test is completed with the error, and when the test is completed without the error, a device connected by system reconfiguration is incorporated into the system. Connection confirmation method when reconfiguring the system. 2. The connection confirmation method at the time of reconfiguring the dynamic system according to claim 1, wherein the unique test information is stored and held in a storage device, and is accessed from a workstation, a remote maintenance console, or the like connected via a network. A method for confirming connection during dynamic system reconfiguration characterized by maintaining, updating, and adding unique test information.