JPH0619796A - Automatic changing system for swapping use external storage device in virtual storage system - Google Patents

Abstract

PURPOSE:To automatically change a swapping use external storage device so as to improve the efficiency of a virtual storage system. CONSTITUTION:A SMF part 3 counts swapping, a swapping frequency holding part 4 holds swapping frequency information for an external storage device 1 at every program and an evaluation part 5 decides whether the frequency of swapping are averaged or not at the plural external storage devices 1 based on swapping frequency information and prepares swapping change instruction information to average them at the time of being not averaged. A schedule change holding part 6 holds swapping change instruction information, a schedule management part 8 holds the correspondence of the program to the external storage device 1 and a schedule change part 7 reads swapping change instruction information of the schedule change holding part 6 to change the correspondence of the program to the external storage device 1 held by the schedule management part 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for automatically changing an external storage device for swapping in a virtual storage system,
In particular, a virtual storage system that can change the correspondence between the program and the external storage device for swapping (see Information Processing Handbook, Information Processing Society of Japan, 1st edition, page 166)
The present invention relates to a method for automatically changing an external storage device for swapping in.

[0002]

2. Description of the Related Art In a virtual memory system, program swapping between a main memory device and an external memory device (Information Processing Handbook, Information Processing Society of Japan, First Edition, 1)
However, if the capacity of the main memory device is small, the overhead of input / output to / from the external memory device due to the swapping becomes excessive, and the improvement of its efficiency has been a serious problem.

Conventionally, in order to improve the swapping efficiency in a virtual storage system, there have been methods such as improvement of a program eviction algorithm and decentralization of external storage devices for swapping.

Here, according to the method of decentralizing the external storage device for swapping (hereinafter referred to as a load balancing system), the overhead increases when the input / output due to the swapping of the program concentrates on one external storage device.
By distributing the external storage device used for swapping to multiple external storage devices, the overhead of I / O to the external storage device due to swapping is also distributed, so the overall overhead of the virtual storage system is reduced and efficiency is improved. Is known to do.

[0005]

In the conventional load balancing method described above, the efficiency of the virtual storage system is affected by which program the swapping external storage device divided into a plurality of external storage devices is used for swapping. Therefore, even if the usage method of the swapping external storage device is set once, the efficiency of the virtual storage system may be optimized by the operation of the information processing device, and the user can optimize the usage efficiency of the swapping external storage device by the virtual storage system. There was a problem that it had to be constantly changed.

In view of the above points, the object of the present invention is to provide an SMF.
Part (this part is Sy that is normally equipped in an information processing device)
Refers to the Stem Management Facility. The same shall apply hereinafter) (refer to Information Processing Handbook, Information Processing Society of Japan, 1st edition, page 277), and automatically change the external storage device for swapping to improve the efficiency of the virtual storage system. Another object of the present invention is to provide an automatic changing method of an external storage device for swapping in a virtual storage system.

[0007]

The automatic changing method of the swapping external storage device in the virtual storage system of the present invention is mainly used in a virtual storage system capable of changing the correspondence between the program of the information processing device and the swapping external storage device. An SMF unit for measuring the swapping of a program performed between a storage device and an external storage device, and this SMF unit.
The swapping number holding unit holds the swapping number information for each program for each external storage device, and the swapping number for each external program for each program is plural based on the swapping number information held in the swapping number holding unit. Of the external storage device to determine whether or not it is averaged and, if not, create a swapping change instruction information for averaging the number of times the program is swapped to the external storage device with a plurality of external storage devices. And a schedule change holding unit that holds the swapping change instruction information created by this evaluation unit, a schedule management unit that holds the correspondence between the program and an external storage device used by the program for swapping, and the schedule change. Is held in the holding unit And a schedule change section for changing the correspondence between the program and the external storage device by reading the swapping change instruction information held in the schedule management unit.

[0008]

In the automatic changing system of the external storage device for swapping in the virtual storage system of the present invention, the SMF unit measures the swapping of the program performed between the main storage device and the external storage device, and the swapping number holding unit is the SMF.
The information on the number of swapping times for each program stored in the external storage device is stored by the evaluation unit, and the evaluation unit stores a plurality of swapping times for the external storage device for each program based on the swapping number information held in the storage unit. If it is not averaged by judging whether it is averaged by the device, create swapping change instruction information that averages the number of swapping programs to the external storage device in multiple external storage devices, and schedule change holding unit Holds the swapping change instruction information created by the evaluation unit, the schedule management unit holds the correspondence between the program and the external storage device used by the program for swapping, and the schedule change unit is held in the schedule change holding unit. Swapping change instruction information Read and modify the correspondence between program and external storage device held by the schedule management unit.

[0009]

The present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of an automatic changing system of an external storage device for swapping in a virtual storage system according to an embodiment of the present invention. The automatic changing method of the swapping external storage device in the virtual storage system of the present embodiment is a plurality of external storage devices 1 used in the virtual storage system and a main storage that is an internal storage device (generally called a memory). A device 2; an SMF unit 3 for measuring the number of times programs are swapped between the main storage device 2 and the external storage device 1 during operation of the virtual storage system;
External storage device 1 for each program measured by the SMF unit 3
On the basis of the swapping frequency information held by the swapping frequency information holding section 4, and whether or not the swapping frequency is averaged among the plurality of external storage devices 1. An instruction for changing the designation of the swapping external storage device 1 used by a predetermined program so that the number of times of swapping is averaged among the plurality of external storage devices 1 when not averaged (hereinafter , Swapping change instruction information), a schedule change holding unit 6 that holds the swapping change instruction information created by the evaluation unit 5, and a swapping change instruction information that is held in the schedule change holding unit 6. Of the external storage device 1 that is read by the program and used by the program for swapping. Schedule changing unit 7 for changing response information (hereinafter referred to as swapping correspondence information) and swapping correspondence information indicating to which external storage device 1 of the plurality of external storage devices 1 the virtual storage system swaps programs. It is composed of the schedule management unit 8 held therein.

FIG. 2 is a block diagram showing details of the evaluation unit 5. The evaluation unit 5 divides the swapping number information held in the swapping number holding unit 4 into a plurality of external storage devices 1 and a swapping number sorting unit 51, and an average value of the swapping numbers of the plurality of external storage devices 1. And the average number of swapping times of the external storage device 1, and the swapping number average value determining means 52 for dividing the number of swapping times of the external storage device 1 into a larger number and a smaller number. A small swapping number holding means 53 for holding the number of swapping times smaller than the average value, and a large swapping number holding means 54 for holding the number of swapping times larger than the average value in the swapping number information of the external storage device 1. Large swapping number holding means 54
A program having a larger swapping frequency (hereinafter referred to as program A) is selected from the programs stored in the external storage device 1 having a larger swapping frequency than any other external storage device 1 and swapped to the external storage device 1. ) Is selected, and the number of swapping times of the program A is retrieved from the external storage device 1 divided into the small swapping frequency holding means 53 and the external storage device 1 and the swapping frequency of the program A is determined.
The external storage device 1 (hereinafter referred to as the external storage device X) smaller than the average value of the number of swapping times is added to the number of swapping times and the program A selected by the program reading means 55 and the external storage device reading means 56 are selected. The external storage device X and the external storage device reading means 56 that creates swapping change instruction information for the schedule management unit 8 so that the swapping of the program A is executed by the external storage device X and causes the schedule change holding unit 6 to hold the swapping change instruction information. Become.

Next, the operation of the automatic changing system of the swapping external storage device in the virtual storage system of the present embodiment thus constructed will be described based on the concrete examples shown in FIGS.

FIG. 3 is a diagram showing a schedule management table stored in the schedule management unit 8. The program name column in the schedule management table stores the name of the program, the external storage device name column stores the name of the external storage device 1, and each program and the swapping used by the program when operating the virtual storage system. External storage device 1
The correspondence with is shown.

FIG. 4 is a diagram showing an example of the swapping number information stored in the swapping number holding unit 4 by the SMF unit 3. The external storage device name column is the name of the external storage device 1, the program name column is the name of the program used for swapping for each external storage device 1, the program swapping count column is the swapping count of each program, and the external storage device swapping count. Column is external storage device 1
Stores the total number of swapping times for each program using.

In FIG. 5, the evaluation unit 5 uses the swapping number information shown in FIG.
It is a figure which shows the state classified and stored in the large swapping frequency holding means 14. The swapping number information of FIG. 4 held in the swapping number holding unit 4 is
The external storage device 1 is arranged in ascending order of the external storage device swapping numbers by the swapping number sorting means 51, and the average value of the external storage device swapping numbers of all the external storage devices D1, D2, and D3 is arranged by the swapping number average value determination means 52. (= (90 + 80 + 20) /
3) is calculated, and the swapping number information is classified and stored in the small swapping number holding means 53 and the large swapping number holding means 54 based on the average value 63.
That is, since the external storage device swapping times 90 and 80 of the external storage device names D1 and D3 shown in FIG. 5A are larger than the average value 63 of the swapping times, they are held in the large swapping frequency holding means 54 and b in FIG. Since the external storage device swapping number 20 of the external storage device name D2 indicated by is smaller than the average value 63 of the external storage device swapping numbers, it is held in the small swapping number holding means 53.

Next, by the program reading means 55,
The program name P1 in the swapping number information held in the large swapping number holding means 54 is read first (the reading order is P1, P4, P3 and P5), and then by the external storage device reading means 56. Even if the swapping external storage device 1 of the program name P1 is changed, the external storage device name of the external storage device 1 of the external storage device 1 becomes the small swapping number holding means 53 such that the swapping number becomes equal to or smaller than the average value 63 of the swapping numbers. The stored external storage device name is searched. Here, from FIG. 5, the external storage device name held in the small swapping number holding means 53 is D2, but the program swapping number 50 of the program name P1 is changed to the external storage device swapping number 20 of the external storage device name D2. When added, it becomes 70 (= 50 + 20). Since this value exceeds the average value 63 of the number of swappings, it is understood that the program name P1 cannot change the external storage device 1.

Next, in the same manner, the program reading means 5
5, the program name P4 is read, but the number of swappings of the program name P4 is 40. Even if it is added to the external storage device swapping number of 20 of the external storage device name D2 read by the external storage device reading means 56, 6
Since it is 0 times and is smaller than the average value 63 of the number of swapping, the swapping change instruction information for changing the swapping external storage device 1 having the program name P4 to the external storage device 1 having the external storage device name D2 as shown in FIG. It is created and held in the schedule change holding unit 6.

In FIG. 7, the schedule changing unit 7 reads the swapping change instruction information shown in FIG. 6 held in the schedule change holding unit 6 and swaps the program name P4 in the schedule management table shown in FIG. External storage device 1 for external storage device 1 having the external storage device name D1
Shows the state in which the external storage device 1 has been changed from the external storage device name D2.

By changing the contents of the schedule management table as described above, the maximum value of the external storage device swapping number of 90 times is 50 times (= the external storage device swapping number of the external storage device name D1−the swapping of the program name P4). (Number of times = 90-40), the maximum value of the number of times of swapping the external storage device of the entire information processing apparatus can be reduced from 90 times of the external storage device name D1 to 80 times or less of the external storage device name D3. This means that the swapping external storage device 1 in the system can be automatically changed.

Here, since the schedule management table is generally read and operated in the main storage device 2 when the virtual storage system is activated, the schedule management table thus modified is used by the user. The operation is performed at the next start-up of the virtual storage system or by the user explicitly operating the virtual storage system to read the schedule management table.

[0021]

As described above, according to the present invention, in the virtual storage system capable of changing the external storage device for swapping used by the program, the SMF unit, the swapping frequency holding unit, the evaluation unit, the schedule change holding unit, the schedule change Section and schedule management section, by automatically changing the correspondence between the program and the external storage device in the schedule management table so that the number of swapping times for the external storage device for each program is averaged by a plurality of external storage devices, In the virtual storage system, there is an effect that the input / output to / from the external storage device due to swapping is distributed and the information processing device can be operated efficiently.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an automatic changing system of an external storage device for swapping in a virtual storage system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing details of an evaluation unit in FIG.

FIG. 3 is a diagram showing an example of contents of a schedule management table showing correspondence between programs stored in a schedule management unit in FIG. 1 and external storage devices.

FIG. 4 is a diagram showing an example of swapping count information between an external storage device and a main storage device stored in a swapping count holding unit in FIG. 1.

FIG. 5 is a diagram showing a state in which the swapping number information of FIG. 4 is classified and stored in a small swapping number holding means and a large swapping number holding means.

FIG. 6 is a diagram showing an example of swapping change instruction information held in a schedule change holding unit in FIG. 1.

7 is a diagram showing a state in which the schedule management table in FIG. 3 is changed based on the swapping change instruction information in FIG.

[Explanation of symbols]

 1 External Storage Device 2 Main Storage Device 3 SMF Section 4 Swapping Count Holding Section 5 Evaluation Section 6 Schedule Change Holding Section 7 Schedule Changing Section 8 Schedule Management Section 51 Swapping Count Sorting Means 52 Swapping Count Average Determining Means 53 Small Swapping Count Holding Means 54 large swapping number holding means 55 program reading means 56 external storage device reading means

Claims (1)

[Claims] 1. A virtual storage system capable of changing the correspondence between a program and an external storage device for swapping, and an SMF section for measuring the swapping of a program performed between a main storage apparatus and an external storage apparatus. A swapping number holding unit that holds the measured swapping number information for the external storage device for each program, and a plurality of external swapping numbers for the external storage device for each program based on the swapping number information held in the swapping number holding unit. An evaluation unit that creates swapping change instruction information that determines whether or not the storage devices are averaged and, if not averaged, the number of swappings for each program to the external storage device is averaged in a plurality of external storage devices. , Swappies created by this evaluation department A schedule change holding unit that holds the change instruction information, a schedule management unit that holds the correspondence between the program and the external storage device used for swapping, and a swapping change that is held in the schedule change holding unit. An automatic changing method for an external storage device for swapping in a virtual storage system, comprising: a schedule changing unit for reading instruction information and changing a correspondence between a program held in the schedule managing unit and the external storage device.