JP2590610B2 - Device hot-swap test equipment in multiplex system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus insertion / extraction test apparatus for confirming that no influence is exerted on the whole system when an apparatus insertion / extraction test is performed in a multiplex system.

In recent years, the number of non-stop computers capable of continuing operation without stopping the system even when a device is duplicated and a failure occurs has been increasing. In such a non-stop computer, a more accurate test method for the hot-swap mechanism must be used because the fault must be removed and the faulty device removed, and the system must continue to operate without adverse effects even if a new device is installed. Has been requested.

[0003]

2. Description of the Related Art FIG. 3 is a diagram showing a conventional system configuration, in which (a) shows an example of the configuration of a single system, and (b) shows an example of the configuration of a multiplex system.

In a data processing system having a so-called single configuration as shown in FIG. 1 (a), even if a failure occurs in a certain device, for example, an adapter device 2, operation continues in a degenerated configuration. As a result, there is a problem that the system cannot be operated as a non-stop computer because the system is down.

[0005] For this reason, at present, the apparatus stops when a failure occurs, and is not equipped with a function that enables hot insertion and removal during system operation.

[0006]

Therefore, the number of multiplexing systems as shown in FIG. 2 (b) is increasing. In such a multiplexing system, a failure occurs in a certain device, for example, a bus handler device 3a. When this occurs, the bus handler device 3a in which the fault has occurred is removed and the bus handler device 3b is removed.
In this case, the operation of the system is continued by degenerating the system into a single-system device using the system.

In this case, it is necessary to ensure that the system does not go down even if the fault occurrence device (bus handler device 3a) is hot-swapped. An object of the present invention is to provide a device hot-swap test method that does not affect the entire system even if the faulty bus handler device is removed, and more specifically, a verification means of the hot-swap mechanism. It is intended for.

[0008]

FIG. 1 is a block diagram showing the principle of the present invention. The above-mentioned problem is solved by a device active insertion / extraction test device of a multiplex system configured as follows.

In a multiplex system, a device is inserted into a certain system.
Or a multiplexing system to verify the effect on other systems when removed.
Apparatus OIR test apparatus in a system, multiplexing
Configure the central processing unit of the system in master and slave format
Means for changing the configuration and the central processing unit on the master side.
The central processing unit on the slave side is hot-inserted into the device.
Of the system configuration and device active insertion / removal test
Means for notifying the start and the slave-side central processing unit.
The notification content from the central processing unit on the master side
Means for performing a diagnostic process on the system based on
Diagnosis processing is performed in the central processing unit on the master side.
The central processing unit on the slave side
Check whether the specified device has been inserted into or removed from the system
To the central processing unit on the slave side.
In response to the confirmation instruction from the master side,
Check whether the specified device has been inserted or removed from the stem
And sends the result to the central processing unit on the master side.
And means.

[0010]

In FIG. 1, reference numerals 3a and 3b denote bus handlers for controlling a bus, and 1a denotes a master central processing unit.
(CPU), and 1b is a slave central processing unit (CPU). The principle of the present invention will be described with reference to FIG. In this example, the case where the bus handler device 3a has failed is taken as an example.The present invention uses the data processing function and data transfer function of the central processing units (CPU) 1a and 1b to remove the failed device. This is to check the operation of the system after hot insertion and removal.

1) In order to start an excerpt test of the bus handler device 3a, for example, the central processing unit (C
PU) 1a as a master, and the other central processing unit (CPU) 1b as a slave, and then from the central processing unit (CPU) 1a of the master, all the central processing units (CPUs 2, 3, ... n) on the slave side. 1b
Then, an insertion / removal test start condition (in this example, the test is performed by removing the failed bus handler device 3a) and a message for starting the insertion / removal test are notified, and the operations are synchronized.

2) From the master central processing unit (CPU) 1a,
A message for extracting the bus handler device 3a is output to a display screen of a system console (not shown), and a notification for confirming that the operator has removed the bus handler device 3a is notified by the central processing unit on the slave side.
(CPU) Send to 1b.

3) Each central processing unit (CPU) 1b on the slave side
Is the bus handler device 3a based on the notified fault information.
The bus handler 3b and the bus
Using # 14, I / O access is continuously performed by the adapter device 2b, and it is confirmed that normal operation does not affect the bus # 14 due to the removal of the bus handler device 3a. Together with the bus handler device
Sends a bus acquisition request to the bus handler device 3a.
Is completely removed, the master central processing unit (CPU) 1a is notified of the fact.

4) In the same manner as above, this time, an insertion message is sent from the central processing unit (CPU) 1a of the master to the operator so as to insert the repaired or new bus handler device 3a. By outputting, the operator performs insertion.

5) Slave central processing unit (CPU) 1b
Uses the same bus handler device 3b as above to
Even if the bus handler device 3a is inserted continuously and the bus handler device 3a is inserted, it operates normally, and it is confirmed that the insertion of the bus handler device 3a does not affect the bus # 14.

6) After confirming the insertion of the bus handler device 3a, all central processing units (CPUs) 1a and 1b use the test target bus (in this example, the above bus # 04) to perform I / O access or data access. Confirm that the bus # 04 can be used by performing the transfer.

As described above, according to the present invention, all the central processing units (CPUs 1a and 1b) and buses (# 0 / # 1)
By making full use of the data transfer function using 4, the system operation after the hot insertion and removal is confirmed.

Therefore, by performing an operation test in a normal system while hot-swapping the faulty device by the above means, the hot-swapping of the faulty device does not adversely affect the operation of the entire system. Has the effect of enabling confirmation of

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a block diagram showing the principle of the present invention, and FIG. 2 is a flowchart showing an embodiment of the present invention.

In the present invention, when a device in a multiplexing system fails, a central processing unit (hereinafter referred to as a CPU) 1 of the system is set to a master CPU 1a / slave C
The configuration is changed to the PU1b format, the master CPU 1a notifies the slave CPU 1b of the condition and start of the insertion / removal test, and when the slave CPU 1b receives the notification from the master CPU 1a, the condition is met. While performing specific data processing with the device configuration described above, after confirming the insertion / removal of the faulty device based on the notification from the master CPU 1a instructing the confirmation of the insertion / removal of the faulty device, the slave CPU 1b confirms the confirmation. Means for notifying the master CPU 1c of the present invention is a means necessary for carrying out the present invention. Note that the same reference numerals indicate the same object throughout the drawings.

Referring now to FIG. 1 and FIG. 2, FIG. 2 shows a device active insertion / removal test in the multiplexing system of the present invention.
The device will be described. In FIG. 2, (a) shows the master CPU 1
The operation at a is shown, and the operation at slave CPU 1b is shown at (b).

A. First, in the multiplexing system, for example, when a failure occurs in the bus handler device 3a, among the plurality of CPUs 1, the CPU 1a, which is the youngest of the machine numbers, is set as the master CPU having the initiative of the test. CPU 1
b is a slave CPU, and from the master CPU 1a,
For the slave CPU 1b, a normal system (that is, bus # 1)
Using the data transfer means according to 4), the conditions of the device extraction test, for example, the bus handler device 3a and the bus # 0 4
And the start of the device excerpt test are notified. (See steps 100 and 105) b. The slave CPUs 1b other than the master CPU 1a continuously perform I / O access using, for example, the adapter 2b using a bus (bus # 14 in this embodiment) that is not to be tested. (See step 106) c. The master CPU 1a outputs to a display screen of a system console (not shown) so as to remove the faulty bus handler device 3a connected to the bus 4 of the # 0 system.

The operator removes the failed bus handler device 3a based on the content indicated on the display screen. (See steps 101 and 102) d. The above operation c. By using the other bus (in this example, bus # 14), the master CP is used to confirm that the bus handler device 3a has been removed from the entire system.
A message for confirming the removal is transferred from U 1a to another slave CPU 1b. (Step
103) e. Slave CPU 1 notified by the message
b confirms that the bus # 04 cannot be used because the bus handler device 3a has been extracted and cannot be accessed using the bus # 04 on the extracted side. The other bus # 1 when the bus handler device 3a is pulled out
4 is confirmed by the normal termination of the I / O continuous access. (Step 10
The slave CPU 1b transmits a confirmation completion message to the master CPU 1a when the confirmation of the extraction is completed. (Step 110
Similarly, when the bus handler device 3a is inserted, the test is performed in the following procedure.

F. After the confirmation of the test by all the CPUs, the master CPU 1a notifies the other slave CPUs 1b of the start of the insertion test of the bus handler device 3a by using the data transfer means of the normal system.

G. The slave CPU 1b continuously performs I / O access using a bus (bus # 14) that is not to be tested. h. The master CPU 1a outputs to the display screen of the system console (not shown) to insert the faulty bus handler device 3a connected to the bus 4 of the # 0 system.

The operator inserts the bus handler device 3a based on the instruction on the display screen. i. To confirm that the bus handler device 3a has been inserted into the system, use the other bus # 14 and use the normal system data transfer means from the master CPU 1a to the other slave CPU 1b. Sends a message instructing insertion confirmation.

J. The slave CPU 1b, which has been notified of the message, can insert the bus handler device 3a and
Check that # 04 can be used. Also, confirm that there is no effect on the other bus # 14 when the device is inserted.
1 4, Confirmed by normal termination of I / O continuous access using the system of adapter device 2b.

K. After confirming the insertion of the bus handler device 3a, all the CPUs 1a and 1b send a test target bus (in this example, the above bus
Confirm that the bus # 04 can be used by performing I / O access or data transfer using # 04).

In the above embodiment, an example was described in which the bus handler device 3a failed, but it goes without saying that the present invention is not limited to the failure of the bus handler devices 3a and 3b.

For example, for a failure of the adapter device 2a or 2b, an active insertion / extraction test for the adapter device 2a or 2b is performed in the same procedure as the active insertion / extraction test for the bus handler device 3a or 3b. Possible, but CPU 1
For the devices a and 1b, since the device is connected to both of the buses # 0/14, the failed CPU 1a or 1b is connected to the bus # 0 /
A procedure for testing that the two buses # 0/14 can be used together from all other CPUs 1 separately from the other CPUs 1, for example, the I / O continuous access via the adapter devices 2a and 2b. Thus, an active insertion / extraction test can be performed.

As described above, according to the present invention, all the central processing units (CPUs 1a and 1b) and buses (# 0 / # 1)
It is characterized in that the system operation after the hot insertion and removal is confirmed by making full use of the data transfer function using 4.

[0032]

Effect of the Invention] As described above in detail, device OIR test apparatus in a multiplexed system of the present invention, when a device of a multiplexing system is hampered, the multiplexing cis <br/> Temu Central processing unit (CPU) to the master central processing unit (CP
U) / Configuration change to slave / central processing unit (CPU) format
From the central processing unit (CPU) of the master
The central processing unit (CPU) checks the insertion / removal state and
Of the insertion / removal test to check whether the
Notifying the device configuration conditions and the start of the insertion / removal test,
The central processing unit (CPU) of the
The device configuration conditions for the above insertion / removal test from (CPU)
When the test start notification is received, the insertion / removal test
Perform predetermined diagnostic processing with the equipment configuration that matches the equipment configuration conditions.
First, insert the failed unit from the master central processing unit (CPU).
Insertion / removal of the faulty device based on the notification for
After confirming the
From the CPU (CPU) to the master central processing unit (CPU)
Since as is obtained by the well confirmed for a conventional OIR mechanism, by confirming the normal operation of insertion exempt device, there is an effect that it is possible to perform a highly reliable test.

[Brief description of the drawings]

FIG. 1 is a block diagram of the principle of the present invention.

FIG. 2 is a flowchart showing an embodiment of the present invention.

FIG. 3 is a diagram showing a conventional system configuration;

[Explanation of symbols]

1 Central processing unit (CPU) 1a Master CP
U 1b Slave CPU 2,2a, 2b Adapter device 3,3a, 3b Bus handler device 4 Bus # 0 / # 1 100 to 111 are steps

Claims (1)

(57) [Claims] 1. A device is inserted into a certain system in a multiplexing system.
Or a multiplexing system to verify the effect on other systems when removed.
A system hot-swap test system in a system, where the central processing unit of the multiplex system is in the form of a master and a slave.
Means for changing the configuration to a formula, and in the central processing unit on the master side, the slave side
Of the central processing unit in the system
For notifying the start of the system configuration and device hot-swap test
In the slave central processing unit, the master side
Based on the content of the notification from the central processing unit
Means for performing a diagnosis process on the master , and performing a diagnosis process in the central processing unit on the master side.
The central processing unit on the slave side
Check whether the specified device has been inserted into or removed from the system
Means for instructing, on the slave-side central processing unit,
A predetermined device to the system in response to a confirmation instruction from
Check for insertion or removal of the
Means for responding to the central processing unit on the data side .
Device active insertion and removal test device.