JP2004152060A - Computer system and its disk subsystem - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently execute a processing based on the importance of a business as the whole computer system in a computer system having a computer capable of executing a computer resource as a plurality of computer images. <P>SOLUTION: The computer executes a logical split control program in a computer image according to the priorities of respective logical partitions. The identifier of a logical partition and the priority of the logical partition are reported to the disk subsystem in pair. The disk subsystem performs, to the logical partition, a storage access operation by an input and output instruction from the program executed in the computer image of the logical partition on the basis of the priority reported to the computer. The priority is defined based on the CPU resource allocation to the logical partition and the usage rate of a port to the disk subsystem. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a computer system and an input / output device thereof, and is particularly suitable for a disk subsystem or the like, and is a computer capable of executing computer resources as a plurality of computer images, based on the priority of each computer image. In addition, the present invention relates to a computer system capable of efficiently executing processing based on the importance of business as a whole of a computer system by performing input / output processing according to its priority, and an input / output device thereof.
[0002]
[Prior art]
2. Description of the Related Art With the recent increase in the scale of information processing systems and the scale and diversification of business volumes, input / output devices are required to efficiently operate a wide variety of large amounts of data. This is because efficient input / output operations often lead to more efficient and faster operations.
[0003]
Therefore, in order to improve the operability of data, Patent Literature 1 discloses a method in which a replica of data in a distributed database system is prepared and processing is efficiently performed while ensuring consistency.
[0004]
On the other hand, Patent Literature 2 discloses a means for improving the access performance by shortening and reducing the seek time of each disk in a disk array device.
[0005]
As described above, from the aspect of software and the aspect of hardware, various measures are taken to improve the efficiency of data access, speed up input / output operations, and speed up business processing.
[0006]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 7-295871 [Patent Document 2]
JP-A-9-160729
[Problems to be solved by the invention]
The above prior art is based on the idea of matching the priority of a task performed by a computer with the priority of input / output processing.
[0008]
However, in the above-mentioned conventional technology, a business program operating on a plurality of computer system images shares one input / output device, and furthermore, efficiently executes a series of processes in which priorities are assigned among the businesses. No consideration was given to promote it.
[0009]
On the other hand, in recent years, in order to effectively utilize a high-speed CPU and a large-capacity real storage device that can be mounted, the hardware resources of one computer system are logically divided, and the divided A system has emerged in which one computer system image is constructed, and an independent business program is executed or a business program associated with each other is executed on the computer system image.
[0010]
In a computer system having such a configuration, when the tasks associated with each other are divided and performed on the individual computer systems described above, a case is considered in which the data is shared and the business program is executed using the individual computer system images. Can be
[0011]
Normally, in such a case, priorities are set among the tasks so that the system is designed so that the load of the batch task affects the online task and no processing delay occurs. In order to efficiently perform the tasks of the entire system, it is necessary to prioritize the input / output processing of the tasks with high priority.
[0012]
In the technology of existing computer systems for constructing a plurality of computer images, a method of defining the priority of a program executed on a computer and performing a process based on the priority is known. In this case, there has been no known technique for systematically assigning priorities to input / output operations associated with processing of a program so that those having higher priorities are executed preferentially.
[0013]
Therefore, even if the priority is increased on the computer, the input / output processing is not given a high priority, so the input / output processing becomes a bottleneck, and the processing of high-priority online work is delayed. There was a problem.
[0014]
The present invention has been made to solve the above problems, and an object of the present invention is to provide a computer system having a computer capable of executing computer resources as a plurality of computer images, wherein a disk is provided based on the priority of each computer image. It is an object of the present invention to provide a computer system capable of efficiently executing processing based on the importance of business as a whole computer system by causing storage access of subsystems to be processed according to their priorities.
[0015]
[Means for Solving the Problems]
According to the present invention, in a computer system having a computer capable of dividing a computer resource into a plurality of logical partitions and executing a program with a plurality of computer images and a disk subsystem connected to the computer, the computer A logical partitioning control program for executing a program on the computer image of the logical partition according to the priority of the partition, and means for notifying the disk subsystem of the identifier of the logical partition and the priority of the logical partition as a pair. Constitute.
[0016]
Then, the disk subsystem performs a storage access operation based on an input / output command from a program executed in the computer image of the logical partition based on the priority notified from the computer to the logical partition.
[0017]
The priority of a logical partition is defined by the allocation of CPU resources of the logical partition, the usage rate of ports to disk subsystems, and the like.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 8.
[0019]
[Embodiment 1]
Hereinafter, a first embodiment according to the present invention will be described with reference to FIGS.
[0020]
First, the configuration of a computer system according to the present invention will be described with reference to FIG.
FIG. 1 is a configuration diagram of a computer system according to the present invention.
[0021]
The computer 100 can operate a computer system image on each of two logical partitions by the logical partitioning control program 110. In this embodiment, the name of the computer resource assigned to the computer system image 1: 120 is called LPAR1, and the name of the computer resource assigned to the computer system image 2: 130 is called LPAR2.
[0022]
In LPAR1: 110, the user program 1: 125 operates, and in LPAR2: 120, the user program 2: 135 operates. These two programs perform their tasks while accessing the shared disk subsystem 200.
[0023]
Then, in the computer 100, a port for accessing the storage is allocated to each of the LPAR1 and LPAR2. Port 1-1: 150 is assigned to LPAR1, and port 2-1: 160 is assigned to LPAR2.
[0024]
Each LPAR occupies the assigned port and enforces access to storage. That is, the port is not used by another LPAR. It is the logical partitioning control program 110 that controls such resource allocation. Further, a port 140 is prepared for exclusive use by the logical partitioning control program, and is used to input control information of each LPAR and to notify the disk subsystem 200 of the control information.
[0025]
The disk subsystem 200 is connected to such a computer 100 and provides storage as an auxiliary storage device.
[0026]
The disk subsystem 200 includes ports 0-2: 210, ports 1-2: 220, ports 2-2: 230, an input / output control device 300, and a storage group 240.
[0027]
The port 0-2: 210 is connected to the port 0-1: 140 by, for example, a fiber channel, and is a port dedicated to an access request from the logical partitioning control program 110.
[0028]
Next, the port 1-2: 220 is connected to the ports 1-1: 150 of the LPAR1: 120, and serves as a port for receiving an input / output request from the LPAR1. Finally, the port 2-2: 230 is connected to the ports 2-1: 160 assigned to the LPAR2: 130, and serves as a port for receiving an access request from the LPAR2: 130. An access request requested via these ports 210, 220, and 230 is accepted by the input / output control device 300 and accesses the storage group 240.
[0029]
The storage group 240 includes n storages 240-1, 240-2, and 240-n. Note that the storage group described in the present embodiment logically configures n storages, and does not physically include n storages.
[0030]
Although not shown in FIG. 1, the storage 240-1 stores a resource allocation file 400 in which the logical partitioning control program 110 defines computer resource amounts to be allocated to each of the LPAR1 and LPAR2. . Details of the resource allocation file 400 will be described later.
[0031]
The resource allocation file 400 is accessed when the logical partitioning control program 110 is started, and computer resources are allocated to each of the LPAR1 and LPAR2 based on the access.
[0032]
Then, based on the resource allocation defined in the resource allocation file 400, the logical partitioning control program 110 allocates the resources of the computer 100 to LPAR1: 120 and LPAR2: 130, and allocates the user program 1: 125 and the user program 2 : 135 is executed.
[0033]
Next, the resource allocation file 400 will be described with reference to FIG.
FIG. 2 is a schematic diagram of the resource allocation file 400 according to the first embodiment of the present invention.
[0034]
Record 410 indicates the allocation of computer resources to LPAR1: 120.
[0035]
For LPAR1, it is defined that 2 GB of memory is allocated, the relative allocation of CPU is 60%, and ports 1-1: 150 are assigned as access ports.
[0036]
Similarly, the record 420 indicates the assignment of computer resources to LPAR2: 130. For LPAR2, it is defined that 1 GB of memory is allocated, the relative allocation of CPU is 40%, and ports for access are ports 2-1: 160.
[0037]
Here, the relative allocation of the CPU means that the ratio of the allocation time of the processing program executed by the LPAR1 to the allocation time of the processing program executed by the LPAR2 is 60: This means that control is performed so as to approach 40. Naturally, LPAR1 has a higher priority.
[0038]
Next, the resource allocation notification command will be described with reference to FIG.
FIG. 3 is a schematic diagram showing a resource allocation notification command according to the first embodiment of the present invention.
[0039]
In this embodiment, the disk subsystem 200 is notified of information on the CPU allocation and the port allocated to each LPAR from the resource allocation file 400 when the logical partitioning control program is initialized.
[0040]
In this case, the input / output command is provided with a resource allocation notification command, and is notified to the input / output control device 300. The format 500 of the data used at the time of the notification is as shown in FIG.
[0041]
The information notified for each LPAR can be described in a fixed length, but since the data amount depends on the number of LPARs, the data length 501 is described at the beginning of the data to be notified. Fields 502 to 504 are information on LPAR1: 120. Field 502 stores the identifier of LPAR1, and field 503 stores the relative usage of the CPU. Further, the field 504 stores the port 150 used by the LPAR1: 120. Similarly, information about LPAR2: 130 is described in fields 505 to 507. Field 505 stores the identifier of LPAR2: 130, and field 506 stores the relative CPU usage. Further, the field 507 stores the port 160 used by LPAR2.
[0042]
Next, the processing when the computer system of the present invention is started up will be described with reference to FIG.
FIG. 4 is a flowchart showing the processing of the system startup procedure 600.
[0043]
First, when the system is to be started, a logical partitioning program is loaded and initialized (S610). Next, the resource allocation file 400 is accessed to obtain information on the allocation of computer resources to each of the LPAR1 and LPAR2, and based on the obtained information, the notification data 500 is generated and notified to the disk subsystem (S620). ). As a result, it is possible to notify the disk subsystem 200 of information relating to prioritization of input / output requests from each LPAR. After that, each LPAR1 and LPAR2 are initialized (S630), and business processing is performed (S640).
[0044]
It should be noted that the notification of the notification data 500 to the disk subsystem 200 may be performed dynamically during the execution of the business process.
[0045]
Finally, how the input / output control device 300 prioritizes input / output requests based on the notification data 500 will be described with reference to FIG.
FIG. 5 is a configuration diagram illustrating a mechanism of the input / output control device 300 according to the first embodiment of the present invention.
[0046]
The input / output control device 300 includes a resource allocation information receiving unit 310, an input / output execution unit 320, a monitor and input / output control unit 330, a resource allocation definition table 340, and a monitor table 350.
[0047]
The resource allocation information control receiving unit 310 acquires the notification data 500 notified from the logical partitioning control program 110, and generates a resource allocation definition table 340 based on the acquired data. As shown in FIG. 5, the resource allocation definition table 340 stores information 341 about LPAR1: 120 and information 342 about LPAR2: 130. The type of information stored is the identifier of the LPAR, the relative CPU utilization, and the port occupied and used by each LPAR.
[0048]
The input / output execution unit 320 actually controls access to the storage 240 based on the input / output request received by each port. It is the monitor and input / output control unit 330 that instructs the input / output execution unit 330 from which port the input / output request should be executed with priority. The monitor and input / output control unit 330 monitors from which port the input / output execution unit 330 has executed a request, and what kind of service amount is provided for each LPAR within a certain period in the past. Is stored in the monitor table 350. The monitor table 350 stores, for each LPAR1, LPAR2, the amount of CPU used by the input / output execution unit for each LPAR during a certain period in the past. Here, since the relationship between the LPAR and the port is described in the resource allocation definition table 340, it is possible to know which LPAR was serviced by knowing from which port the request was serviced. It should be noted that the utilization rate of the CPU in the monitor table is the rate of execution by the CPU of the disk subsystem.
[0049]
Then, the monitor and input / output control unit 330 adjusts the input / output execution so that the relative CPU usage of the resource allocation definition table 340 and the relative CPU usage of the monitor table 350 match. Instruct the unit 320.
[0050]
In the case shown in FIG. 5, the CPU usage of the LPAR1: 120 is 60% in the resource allocation definition table 340, but is 30% in the monitor table 350 as a result of the actual service. In such a case, the monitor / input / output control unit 330 instructs the input / output execution unit 320 to give priority to the input / output request of the LPAR1: 120. That is, it instructs that the input / output request received by the port 1-2: 220 be executed with priority. The input / output execution unit 320 that has received the instruction executes the request received by the port 1-2: 220 with priority.
[0051]
By repeating such an operation at an arbitrary time interval, the input / output priority between the target LPARs matches the actual input / output.
[0052]
In the above description of the embodiment, the input / output processing of the disk subsystem has been described using the CPU utilization of the disk subsystem as an example. However, control may be performed so that the relative allocation of the CPUs of the respective LPAR1 and LPAR2 matches the actual number of times of input / output for the input / output request from each port by the input / output execution unit 320.
[0053]
[Embodiment 2]
Hereinafter, a second embodiment according to the present invention will be described with reference to FIGS.
FIG. 6 is a schematic diagram of the resource allocation file 400 according to the second embodiment of the present invention.
FIG. 7 is a schematic diagram illustrating a resource allocation notification command according to the second embodiment of the present invention.
FIG. 8 is a configuration diagram showing a mechanism of the input / output control device 300 according to the second embodiment of the present invention.
[0054]
In the first embodiment, the priority of each LPAR is defined based on the allocation ratio of the CPU of the computer.
[0055]
In the present embodiment, the logical partitioning control program 110 assigns priorities to the LPARs by using the utilization rate of the port to which the LPARs are connected in defining the priority of each LPAR.
[0056]
The configuration of the computer system is almost the same as that of the first embodiment, and only different points will be described below.
[0057]
As shown in FIG. 6, the resource allocation file 450 is defined as a relative usage rate for ports.
[0058]
In the example of this figure, the port usage rates are 60% and 40% in the records 451 and 452 as relative usage amounts for the ports 1-1 and 1-2, respectively. It is a target value of the relative usage of the ports of the disk subsystem 200.
[0059]
The information on the port in the resource allocation file 450 is notified to the disk subsystem 200 as the notification data 550 in the format shown in FIG. 7 after the initialization of the logical partitioning control program.
[0060]
In the notification data 550, L2 of the field 510 indicates the length of the notification data.
[0061]
Fields 552 and 553 and fields 554 and 555 store port identifiers and relative usage in pairs.
[0062]
The resource allocation information receiving unit 310 creates a resource allocation definition table 345 based on the notification data 550, and stores target usage rates as records 346 and 347 for each port.
[0063]
To cope with this, the monitor and input / output control unit 330 monitors the relative usage of the ports 220 and 230 on the disk subsystem side as monitor information, and stores a record 356 and a record 356 in the monitor table 355 for each port. As 357, information is stored.
[0064]
Then, similarly to the first embodiment, it can be realized by controlling the usage rates 356 and 357 of the monitor table to be adjusted in a direction that matches the usage rate of the resource allocation definition table 345.
[0065]
Here, the relationship between the port 1-1: 150 and the port 1-2: 220 and the relationship between the port 2-1: 160 and the port 2-2: 230 can be easily related by collecting system configuration information and the like. .
[0066]
【The invention's effect】
According to the present invention, in a computer system having a computer capable of executing computer resources as a plurality of computer images, based on the priority of each computer image, storage access of a disk subsystem is also processed according to the priority. Thus, it is possible to provide a computer system that can execute processing efficiently based on the importance of business as the entire computer system.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a computer system according to the present invention.
FIG. 2 is a schematic diagram of a resource allocation file 400 according to the first embodiment of the present invention.
FIG. 3 is a schematic diagram showing a resource allocation notification command according to the first embodiment of the present invention.
FIG. 4 is a flowchart showing processing of a system startup procedure 600.
FIG. 5 is a configuration diagram showing a mechanism of the input / output control device 300 according to the first embodiment of the present invention.
FIG. 6 is a schematic diagram of a resource allocation file 400 according to the second embodiment of the present invention.
FIG. 7 is a schematic diagram showing a resource allocation notification command according to the second embodiment of the present invention.
FIG. 8 is a configuration diagram showing a mechanism of an input / output control device 300 according to a second embodiment of the present invention.
[Explanation of symbols]
100 computer, 110 logical partition control program, 120 LPAR1, 130 LPAR2, 140 port, 150 port, 160 port, 200 disk subsystem, 210 port, 220 port, 230 port, 240 ... Storage group, 300 ... input / output control device, 310 ... resource allocation information receiving unit, 320 ... input / output execution unit, 330 ... monitor and input / output control unit, 340 ... resource allocation definition table, 350 ... monitor table, 400 ... resources Allocation file, 450: resource allocation file, 500: notification data, 550: notification data.

Claims (8)

In a computer system having a computer capable of dividing a computer resource into a plurality of logical partitions and executing a program with a plurality of computer images, and an input / output device connected to the computer,
The calculator is:
Means for executing a program on the computer image of the logical partition according to the priority of each logical partition;
The input / output device has means for notifying the identifier of the logical partition and the priority of the logical partition as a pair,
The input / output device,
A computer system, characterized in that an input / output operation by an input / output command from a program executed by a computer image of a logical partition is performed on the logical partition based on the priority notified from the computer. In a computer system having a computer capable of dividing a computer resource into a plurality of logical partitions and executing a program with a plurality of computer images, and a disk subsystem connected to the computer,
The calculator is:
A logical partitioning control program that executes a program on a computer image of the logical partition according to the priority of each logical partition;
Means for notifying the disk subsystem of the identifier of the logical partition and the priority of the logical partition as a pair,
The disk subsystem includes:
A computer system, wherein a storage access operation by an input / output command from a program executed by a computer image of a logical partition is performed on the logical partition based on the priority notified from the computer. 3. The computer system according to claim 2, wherein the priority of the logical partition is defined by an allocation of CPU resources of the logical partition or a usage rate of a port to the disk subsystem. In a disk subsystem connected to a computer capable of dividing a computer resource into a plurality of logical partitions and executing a program on a plurality of computer images,
The calculator is:
Depending on the priority of each logical partition, execute the program on the computer image of that logical partition,
By notifying the connected disk subsystem of the identifier of the logical partition and the priority of the logical partition in a pair,
Upon receiving the notification, the disk subsystem
A disk subsystem which performs a storage access operation by an input / output command from a program executed by a computer image of a logical partition based on a priority notified from the computer to the logical partition. 5. The disk subsystem that has received the notification adjusts the usage rate of the port for communicating with the computer image of the logical partition based on the priority of the logical partition notified from the computer. The described disk subsystem. Computer resource is divided into a plurality of logical partitions, a computer capable of executing a program with a plurality of computer images, and an input / output control method of a computer system having an input / output device connected to the computer,
The calculator is:
Executing a program on the computer image of the logical partition according to the priority of each logical partition;
Executing a procedure for notifying the input / output device of the identifier of the logical partition and the priority of the logical partition as a pair,
The input / output device,
A computer for executing an input / output operation based on an input / output command from a program executed by a computer image of a logical partition on the logical partition based on the priority notified from the computer. How to control the input and output of the system. In a method for controlling input / output of a disk subsystem of a computer system having a computer capable of dividing a computer resource into a plurality of logical partitions and executing a program on a plurality of computer images, and a disk subsystem connected to the computer,
The calculator is:
The logical partitioning control program executes the program on the computer image of the logical partition according to the priority of each logical partition,
The disk subsystem issues a command for notifying the identifier of the logical partition and the priority of the logical partition as a pair,
The disk subsystem includes:
Monitor your own storage access activity,
A storage access operation by an input / output command from a program executed in a computer image of a logical partition, for the logical partition, by comparing the priority notified from the computer with a monitor value of the monitor, An input / output control method for a disk subsystem, comprising adjusting. In the input / output control program of the disk subsystem connected to the computer,
The computer connected to the disk subsystem
Dividing the computer resources into a plurality of logical partitions, executing a program with a plurality of computer images according to the priority of each logical partition,
When notifying the disk subsystem of the identifier of the logical partition and the priority of the logical partition,
A disk for executing a function of performing a storage access operation by an input / output command from a program executed in a computer image of a logical partition based on a priority notified from the computer to the logical partition. Subsystem I / O control program.

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