JPH01292552A - Peripheral system fault processing system for virtual computer system - Google Patents

Abstract

PURPOSE:To attain the high reliability when a channel fault occurs with a real computer by inhibiting the information of this fault to a virtual computer and recovering an I/O under execution after the fault is processed. CONSTITUTION:A real device 26 of a real computer 1 is allocated as a virtual device 30 of a virtual computer 27. In case a host real channel 22 of the device 26 has a fault while an I/O instruction is carried out to the device 26 working as the device 30, a channel fault occurs at the computer 1. In this case, a real calculation channel fault processing means 2 of the computer 1 works to perform the I/O recovering processes to the real devices 24-26 of the computer 1. When the channel fault occurred at the computer 1 is reported to a virtual computer monitor 3 of the channel 22, a means 4 of the monitor 3 identifies the relevant virtual computer. At the same time, a means 5 discontinues the execution of the I/O instruction and a means 6 extracts the I/O information. Then a means 7 performs the recovery of the I/O instruction to the device 30 and means 8 restarts the execution of the I/O instruction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a virtual computer system, and more particularly to a failure handling method in a virtual computer system that deals with a channel failure that occurs during the operation of a virtual computer.

[Conventional technology]

Conventionally, in this type of virtual computer system, when a channel failure occurs in a real computer while the virtual computer is operating, the following processing has been performed.

First, I10 recovery processing for the device used in the actual computer was performed by actual computer channel failure processing in the actual computer. Thereafter, the actual computer channel failure process reported the occurrence of a channel failure and the I10 information of the virtual machine to the virtual machine monitor, and the virtual machine monitor notified the virtual machine of the occurrence of the channel failure. In the virtual machine that received the notification of the occurrence of a channel failure, I10 recovery processing of the virtual machine by virtual machine channel failure processing was performed. At this time, the virtual machine channel fault processing of the virtual machine performed the I10 recovery processing of the virtual machine based on the I10 information obtained by the virtual machine monitor from the real computer channel fault processing.

In this way, all interfaces are used between the real computer channel failure processing of the real computer and the virtual machine monitor, the virtual machine monitor, and the virtual computer channel failure processing of the virtual machine, and the I10 recovery of the virtual machine is performed. Processing was carried out without any contradiction.

False Part [Problem to be Solved by the Invention] In the conventional virtual machine system described above, the virtual machine must perform recovery processing for a channel failure that occurs while the virtual machine is operating, and the virtual machine monitor and interface The drawback is that unless the virtual machine has a channel failure and process number, the virtual machine cannot continue execution when a channel failure occurs. , , [Means for solving the problem] “In a virtual computer system configuration in which multiple virtual computers are fully implemented, it is possible to allocate a real device as a virtual device while the virtual computer is operating and cause a channel failure to occur during use. a real computer channel fault processing means for executing channel fault processing in a real computer; a faulty virtual computer identification means for identifying a virtual computer that was using the affected real device as a virtual device; and a faulty virtual computer identification means. virtual machine I10 interrupting means for interrupting the I10 execution process in the virtual machine identified by; failure I10 information retrieval means for retrieving I10 information of the failed device when a channel failure occurs; A virtual machine I10 recovery means that recovers Ilo that was being executed on the virtual machine based on the information obtained, and a virtual machine that resumes I10 execution processing in the virtual machine after I10 recovery.
A virtual machine monitor is provided with a computer I10 restart means, and is configured so that when a channel failure occurs, a virtual machine monitor performs a recovery process for Ilo that was being executed in the virtual machine.

Example] Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention, FIG. 2 is a diagram showing part of the system configuration of one embodiment of the present invention, and FIG. 3 is a block diagram showing the configuration of one embodiment of the present invention. It is a flow chart of processing operation of an example.

This embodiment includes a real computer channel failure processing means 2 and a virtual computer monitor 3, and the virtual computer monitor 3 includes a failed virtual computer identification means 4 and a virtual computer I10 interrupting means 5.
, failure I10 information extraction means 6, and virtual computer I1
0 recovery means 7 and virtual computer 10m opening means 8.

Next, the overall operation of this embodiment will be explained in detail. do.

In a virtual computer in which the implementation 26 in the real computer 1 is allocated and used as the virtual device 30 in the virtual computer 27, Ilo is executed on the real device 26 operating as the virtual device 30 in the virtual computer. When a failure occurs in the real channel 22 of the real device 26, a channel failure occurs in the real computer. At this time, the real computer channel fault processing means 2 of the real computer operates, and the I1010 recovery process step 41) for the real device used in the real calculation is performed.

If there is a device being used by a virtual computer under the real channel 22, the virtual computer monitor reports that the real computer + channel failure has been abolished. Upon receiving the channel failure report, the virtual machine monitor identifies the failed real device 26 as the virtual machine 3 using the failed virtual machine identifying means 4.
The virtual machine being used as 0 is identified (step 42).

Furthermore, in order to perform recovery processing for the failed Ilo, the execution of the ■10 instruction in the virtual machine is interrupted by the virtual machine I10 interrupting means 5 in step 43) and stored in the I10 information storage area. The I10 information of the real device 26 that was being executed on the virtual machine at the time of the channel failure is transferred to the I10 information extraction means 6.
(step 44). I1 taken out
Based on the 0 information, the virtual machine I10 recovery means 7
Il for the virtual machine 30 running on the virtual machine
All recovery processing of o is performed (step 45).

After the completion of the running I10 recovery process, the Il in the virtual machine that was suspended by the I10 restarting means 8 of the virtual machine
o is resumed (step 46), and Il in the virtual machine is restarted (step 46).
The execution of o continues.

As described above, by handling faults using the virtual machine monitor, a system running on a virtual machine can detect a fault without having to take any action to deal with the fault even if a fault occurs in a real computer. It is possible to continue operating without any problems.

〔Effect of the invention〕

As explained above, in the present invention, when a channel failure occurs in a real computer while a virtual computer is operating, the virtual computer monitor does not notify the virtual machine of the channel failure after the failure is processed in the real computer. By performing I10 recovery during execution in a virtual machine, high reliability can be achieved even in a virtual machine that does not implement a channel fault when a channel fault occurs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention, FIG. 2 is a block diagram showing a part of the configuration of an embodiment of the present invention, and FIG. 3 is a processing operation of an embodiment of the present invention. flowchart. 1...Real computer, 2...Real computer channel failure processing means, 3...Virtual needle'n machine monitor, 4...Faulty virtual computer identification means , death...
・Virtual computer I10 interrupting means, 6... Failure I1
0 information retrieval means, 7...virtual computer I10
Recovery means, 8...Virtual computer I10 restart means,
27...Virtual computer.

Claims (1)

[Claims] In a virtual machine system that realizes multiple virtual machines, a channel failure occurs while the real machine's device (hereinafter referred to as "real device") is allocated and used as a virtual machine's device (hereinafter referred to as "virtual device") while the virtual machine is operating. a real computer channel fault processing means for executing channel fault processing in a real computer when a fault occurs; a faulty virtual machine identification means for identifying a virtual machine that was using a faulty real device as a virtual device; and a faulty virtual computer identification means. a virtual machine I/O interrupting means for interrupting input/output (hereinafter referred to as I/O) execution processing in a virtual machine identified by the means; and a failure I/O for extracting I/O information of a faulty device when a channel fault occurs. /O information retrieval means and fault I/O
A virtual machine I/O recovery means that recovers the I/O being executed in the virtual machine based on the information obtained by the O information extraction means;
A peripheral system in a virtual computer system, comprising a virtual computer I/O restart means for restarting execution processing, and a virtual computer monitor performing recovery processing for I/O being executed in the virtual machine when a channel failure occurs. Failure handling method.