JP2002006976A - Scheduling method of computer system's power supply, its operating equipment, and recording medium in which its transaction program is recorded - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique by which a power supply schedule of a shared computer utilized by some user computers, for example section servers, having independent power supply schedules and being operated independently can be set fitting the power supply schedules of the user computers. SOLUTION: As for the scheduling method of the computer's power supply by which the power supplies of the shared computer utilized by plural user computers is controlled, this system has following steps; the step which acquires the schedule data giving on/off of the power supply of each user computer and registers them, the step which generates the shared computer's schedule data having on/off of the power supply of the shared computer which is calculated from the time when the power supplies of all user computers become off and the time when the first initiated user computer becomes on from the state which all user computers' power supplies are off based on the above registered user computers' schedule data, and the step which carries out on/off of the power source of the common use computer in accordance with the generated schedule data of the shared computer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer power supply scheduling system for controlling a power supply of a computer according to a schedule, and more particularly to an electronic power supply scheduling system for controlling a power supply of a shared computer shared by a plurality of user computers. And effective technology.

[0002]

2. Description of the Related Art Conventionally, to set a power schedule of a shared computer, a first method of displaying a schedule of a user computer and manually inputting the schedule again to the shared computer, and setting the shared computer by 24 hours. A second method that can be shared at any time without interruption 365 days a day, a third method in which the schedule of the shared computer is distributed to each user computer as it is or partially modified and set as the schedule of the user computer A fourth method (Japanese Unexamined Patent Publication No. 11-345048) is known in which the power off of the user computer is monitored from the shared computer and the power of the shared computer is turned off when all the user computers are turned off. Have been.

[0003]

In the case of the first conventional method, when there are a plurality of user computers, it is necessary to determine a time zone in which all of the user computers are all powered off and to set the time period in the shared computer. It takes time and effort. Also, when the schedule of some user computers is changed, the schedule of the shared computer must be changed according to it, and if the schedule of other user computers can be checked, the schedule setting of the shared computer There is a problem that you make a mistake.

[0004] In the case of the second conventional method, the power of the shared computer is turned on until an unnecessary time zone, and power resources are wasted. In particular, it cannot cope with the case where the power must be turned off for a long holiday or for maintenance of a building.

In the case of the third conventional method, the schedule of the user computer is determined based on the schedule of the shared computer, so that the schedule of the user computer cannot be freely determined. In addition, when the administrator of each user computer changes the schedule of each user computer, the schedule in the shared computer is changed without permission, and there is a problem that the management of the shared computer becomes difficult. Also, in order for the user computer to power on the shared computer during the power-on time period, the operation manager must set the schedule to be distributed to the user computer so that it falls within the operation time period of the shared computer. It takes time.

In the case of the conventional fourth method, the power of the shared computer can be turned off when the power of the user computer is turned off. However, the power of the shared computer is turned on when the power of the user computer is turned on. Turning on the power is not considered, and the user computer must wait until the power is turned on according to the schedule set in the shared computer. Also, in order to monitor the user computers from the shared computer, the status of all the user computers is checked at regular time intervals.
When the number of user computers is large, there is a problem that the load on the network is large. When the schedule of the user computer is referred to from the shared computer, it is not known from the shared computer when the schedule of the user computer has been changed. Therefore, the schedule must be constantly monitored.

An object of the present invention is to have an independent power supply schedule for a department server or the like, and to set the power supply schedule of a shared computer shared by independently operated user computers in accordance with the user computer. It is to provide a possible technology.

[0008]

According to the present invention, there is provided an electronic computer power supply scheduling system for controlling the power supply of a shared computer shared by a plurality of user computers, according to a power on / off schedule of each user computer. The power on / off schedule of the shared computer is determined.

In the computer power supply schedule system of the present invention, first, user computer schedule data indicating ON / OFF of the power of each user computer is obtained from each user computer and registered in the shared computer. The registered user computer schedule includes the time at which the power of all the user computers is turned off and the time at which the power of the user computers is first turned on from the state where the power of all the user computers is turned off. Shared computer schedule data indicating the power on / off of the shared computer is generated from the data.

Next, the time at which the power of the shared computer is turned off indicated in the generated shared computer schedule data is compared with the current time, and if the current time is the time at which the power of the shared computer is turned off, After setting the time for turning on the power of the shared computer indicated in the generated shared computer schedule data, the power of the shared computer is turned off. At this time, if the interval from the power-off to the power-on of the shared computer indicated by the generated shared computer schedule data is shorter than a predetermined time, the end processing and the start processing of the shared computer may not be in time. , The turning off and on of the power supply may be suppressed.

If the user computer changes the user computer schedule data, the contents of the change are acquired from the user computer, and the shared computer schedule data is regenerated using the changed contents.

As described above, according to the computer power supply scheduling system of the present invention, the power on / off of each user computer is controlled.
Since the power on / off schedule of the shared computer is determined according to the off schedule, the power of the shared computer that is shared by user computers that have independent power schedules such as department servers and that are operated independently is used. The schedule can be set according to the user computer.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An electronic computer power supply scheduling system according to an embodiment for controlling the power supply of a shared computer shared by a plurality of user computers will be described below.

FIG. 1 is a diagram showing the configuration of the entire system of the present embodiment. In FIG. 1, the manager computer 101
Represents a shared computer serving as a manager, and an agent computer 102 represents a user computer serving as an agent. Peripheral devices such as software of the manager computer 101, data and a printer are shared by the agent computer 102.

The manager computer 101 and the agent computer 102 are connected to a network, and can communicate information between the computers. Manager computer 10
1. A power control device is installed in each of the agent computers 102, and each computer performs power operation according to its own schedule.

Each agent computer 102 communicates with the manager computer 101, and the manager computer 101 monitors a change in the schedule of each agent computer 102. The manager computer 101 can generate an operation schedule so that one or a plurality of agent computers 102 are not affected in operation, and can operate according to the generated schedule.

FIG. 2 shows the manager computer 10 of the present embodiment.
1 is a diagram showing an internal configuration of an agent computer and an agent computer; FIG. As shown in FIG. 2, the manager computer 10 of the present embodiment
1 is a schedule display unit 201, an agent schedule monitoring unit 202, a manager communication unit 203,
It has a manager schedule generation unit 205, a schedule management unit 207, and a power control unit 208.

The schedule display unit 201 is a processing unit that displays the manager schedule data 204 generated by the manager schedule generation unit 205.
The agent schedule monitoring unit 202 is a schedule monitoring unit that acquires agent schedule data 211 indicating power on / off of each agent computer 102 and registers it as agent schedule data 206. When the agent schedule data 211 is changed, The processing unit acquires the changed content and registers it in the agent schedule data 206.

The manager communication unit 203 is a processing unit that receives, from the agent computer 102, a change occurrence notification indicating that the agent schedule data 211 has been changed and the contents of the change. The manager schedule generation unit 205 first starts the agent computer 1 from the time when all the agent computers 102 are turned off and from the state where all the agent computers 102 are turned off.
02 is a schedule generation unit that obtains the time at which the power supply of the manager computer 02 is turned on from the registered agent schedule data 206 and generates manager schedule data 204 indicating the power on / off of the manager computer 101. The processing unit regenerates the manager schedule data 204 using the changed contents when the change has been made.

The schedule management unit 207 turns on / off the power of the manager computer 101 in accordance with the generated manager schedule data 204.
8, when the interval from the power-off to the power-on of the manager computer 101 indicated by the generated manager schedule data 204 is shorter than a predetermined time, the power-off and power-on of the manager computer 101 is suppressed. This is a processing unit. The power control unit 208 is a processing unit that receives a request from the schedule management unit 207, shuts down the OS, and issues a power-off request to the power control device 209.

A schedule display unit 201, an agent schedule monitoring unit 202,
Manager communication unit 203, manager schedule generation unit 205, schedule management unit 207, and power control unit 2
The program to function as 08 is a CD-ROM
After being recorded on a recording medium such as a digital disk and stored on a magnetic disk or the like, it is loaded into a memory and executed. The recording medium for recording the program may be a recording medium other than the CD-ROM.

The agent computer 102 has a schedule display unit 212, a schedule management unit 213, a power control unit 214, a schedule definition unit 215, and an agent communication unit 217.

The schedule display unit 212 is a processing unit that displays the agent schedule data 211 defined by the schedule definition unit 215. The schedule management unit 213 is a processing unit that detects a change in the agent schedule data 211 and reschedules the next power-off time based on the agent schedule data 211.

The power control unit 214 is a processing unit that receives a request from the schedule management unit 213 and shuts down the OS and issues a power-off request to the power control unit 216. The schedule definition unit 215 is a processing unit that defines the agent schedule data 211. The agent communication unit 217 is a processing unit that, when the agent schedule data 211 is changed, sends a notification of the change and the contents of the change to the manager computer 101.

A program for causing the agent computer 102 to function as the schedule display unit 212, the schedule management unit 213, the power control unit 214, the schedule definition unit 215, and the agent communication unit 217 is a CD-ROM.
After being recorded on a recording medium such as a ROM and stored on a magnetic disk or the like, it is assumed to be loaded into a memory and executed.
The recording medium for recording the program is a CD-ROM.
Other recording media other than the above may be used.

In FIG. 2, a power control device 209 is a device for controlling the power of the manager computer 101. The power control device 216 is the agent computer 1
2 shows a device for controlling the power supply of the power supply No. 02. The manager computer 101 and the agent computer 102 communicate with each other through the manager communication unit 203 and the agent communication unit 217.

The manager computer 101 monitors the request from the agent computer 102 by the agent schedule monitoring unit 202, and the manager communication unit 203
When the schedule change signal is received from the agent computer 102, the schedule request is requested to the manager communication unit 203 to obtain schedule information. The agent schedule monitoring unit 202
The acquired schedule data is registered as agent schedule data 206.

The manager schedule generation unit 205
Upon detecting a change in each agent schedule data 206, based on the agent schedule data 206,
The manager schedule data 204 is regenerated. The manager schedule generation unit 205 creates a bit image representing the power on / off of the agent schedule data 206 in units of minutes based on the agent schedule data 206, and re-calculates it as the manager schedule data 204 by ORing the images. Regenerate schedule information to be registered. The regenerated manager schedule data 204 is registered immediately.

The schedule management unit 207 managing the schedule of the manager computer 101 detects a change in the manager schedule data 204 and reschedules the next power-off time based on the manager schedule data 204. The schedule management unit 207 waits until the scheduled end time of the manager computer 101 and determines whether the power should be turned off as soon as it is reached. Judgment factors include the interval from the set power off to power on,
If the off interval is shorter than the set interval, the power off determination is not performed. If the schedule management unit 207 determines that the power is off, the operation process currently running on the manager computer 101 is terminated systematically or forcibly, and the power control unit 20
In step 8, the next power-on time is set, and a power-off request is issued to the power control unit 208. Scheduled termination is a termination method of performing power monitoring when an application is monitored and all processing is completed, and forced termination is a termination method of forcibly shutting off without waiting for termination of an application or the like. .

The power control unit 208 performs processing for controlling the power control unit 209, and the schedule management unit 207.
From the OS, shut down the OS and
A power-off request is issued to the power control device 209. The power supply control device 209 cuts off the power supply to the manager computer 101 and, if the next power-on time is specified, stops the power supply until the next power-on time.

Also, the schedule display unit 201
The manager schedule data 204 generated by the manager schedule generation unit 205 is displayed, and it is possible to know the hardware maintenance available time and the like by this display.

When the schedule information is changed by the schedule definition unit 215, the agent computer 102 registers the change data in the agent schedule data 211, and sends a change notification to the manager computer 101 by the agent communication unit 217.

In response to a schedule transmission request from the manager communication unit 203, the agent communication unit 217 extracts only the changed portion from the agent schedule data 211 on a daily basis and transmits the extracted portion to the manager communication unit 203.

The agent computer 102 is manually started during the off time period of the manager schedule data 204,
If the communication with the manager communication unit 203 cannot be established, the agent communication unit 217 checks the state of the power supply control device 209.
17 sends a power-on request to the power control device 209, and as soon as communication with the manager communication unit 203 is established,
A change notification is sent to the manager computer 101.

The schedule management unit 213 detects the change by comparing the time stamps of the agent schedule data 211 and detects the change.
Reschedule the next power off time based on 1. The schedule management unit 213 waits until the scheduled end time of the agent computer 102, intentionally or forcibly ends the operation process currently running on the agent computer 102, and sets the next power-on time and the power supply to the power control unit 214. Make an off request.

The power control unit 214 includes a power control unit 216
When a request from the schedule management unit 213 is received, a request for shutting down the OS and turning off the power is issued to the power control device 216.
The power supply control device 216 cuts off the power supply to the agent computer 102 and, if the next power-on time is specified,
Power supply is stopped until the next power-on time.

The manager computer 101 may be provided with a processing unit similar to the schedule definition unit 215 of the agent computer 102 to set the operating time zone of the manager computer 101 itself.

FIG. 3 is a diagram showing an example of schedule data stored in the manager schedule data 204, the agent schedule data 206, and the agent schedule data 211 of FIG. A schedule request date 301 indicates a date for requesting a power on / off schedule, and a request content 302
Indicates the power on or on contents required by the schedule. In FIG. 3, data is stored in chronological order. Note that a plan end or a forced end may be designated as the request content 302, and a schedule for terminating the operation processing in a planned or forcible manner may be performed.

FIG. 4 is a diagram showing a communication sequence between the agent and the manager according to the present embodiment. The agent communication unit 217 sends the change occurrence notification 411 to the manager communication unit 2
03, and the manager communication unit 203 receives the notification (421).

The manager communication unit 203 reports the reception to the agent schedule monitoring unit 202 (422).
The manager communication unit 203 reports the notification reception to the agent communication unit 217 (423), and completes the change occurrence notification reception processing. The agent communication unit 217 receives the notification reception report 423 (412), and completes the change occurrence notification processing.

Upon receiving the schedule data transmission request from the agent schedule monitoring unit 202, the manager communication unit 203 receives the change schedule data transmission request 42.
4 is transmitted to the agent communication unit 217. The agent communication unit 217 receives the request (413), and the agent communication unit 217 transmits the change schedule data to the manager communication unit 203 (414).

The manager communication unit 203 receives the schedule data (425) and transmits the schedule data to the agent schedule monitoring unit 202 (42).
6). After the processing of the schedule data registration 426 is completed, a notification reception report 427 is transmitted to the agent communication unit 217, and the change schedule data reception processing is completed.
The agent communication unit 217 receives the report (415),
The schedule data transmission processing is completed.

FIG. 5 shows the manager computer 10 of this embodiment.
6 is a flowchart illustrating a processing procedure of one manager schedule generation unit 205. The manager schedule generation unit 205 starts processing after detecting registration of a schedule change from the agent (Step 501 and Step 502).

First, the head position of the registered agent schedule data 211 is obtained (step 50).
3) Generate empty manager schedule data 204 (step 504) and register it in the work area.

In step 505, it is checked whether or not the agent schedule data 211 registered in step 503 is present. If there is no agent schedule data 211, the manager schedule data 204 of the work area is registered (step 511). The process returns to the process of waiting for a request from the agent (step 501).

If it is determined in step 505 that the agent schedule data 211 exists, the contents of the agent schedule data 211 are obtained in step 506, and then the manager schedule data 204 is obtained from the work area (step 507).

Based on the data obtained in steps 506 and 507, ON is set to "1" and OFF is set to "0" in units of one minute.
Is generated, and the operating time of the manager is calculated by taking the logical sum of one day.

Here, when the empty manager schedule data 204 is obtained (step 504), the OR is not performed and the agent schedule data 211 is registered as the manager schedule data 204 in the work area.

The data after the logical sum is converted into the format of the manager schedule data 204 and re-registered in the work area (step 509), and the storage location of the agent schedule data 211 registered next is obtained. (Step 510), the process returns to Step 505.

FIG. 6 shows the schedule management unit 2 of this embodiment.
It is a flowchart which shows the processing procedure of 07. The schedule main process acquires schedule data at the time of startup (step 601). As the data to be acquired,
The next power-on time (on time), which is the earliest scheduled time, the planned end time before the next power-on time, and the forced end time before the next power-on time.
In addition, the start grace time and the minimum off-interval time for starting earlier than the agent are also acquired. Here, when only the off time is indicated in the schedule data, the off time may be set as the plan end time, and the time at which a predetermined time such as two hours has elapsed from the off time may be set as the forced end time. .

In step 602, a plan end time is set. If the scheduled end time is reached before the forced end time, the process proceeds to a plan end start waiting process start (step 603).
Otherwise, the process proceeds to step 604. If the plan end is not set, the process proceeds to step 604.

In step 603, a planned end start wait time is calculated (step 603a), and a schedule data change occurrence report wait is performed during the wait time (step 603).
b). If the schedule data change occurrence report is received, the process ends in step 603c. If the scheduled end time has been reached, a scheduled end notification is sent to the schedule main process in step 603d.
The transmitted plan end notification is received in step 607 by the schedule main process.

At step 604, it is determined whether or not there is a forced termination setting. If so, the process for waiting for the forced termination start at step 605 is started. If there is no setting, the process proceeds to step 606. In the forced termination start waiting process in step 605, the forced termination start waiting time is calculated (step 6).
05a), a schedule data change occurrence report wait is performed during the wait time (step 605b). If a schedule data change occurrence report is received, the process ends according to the determination of step 605c. If the forced end start time has been reached, a forced end arrival notification is sent to the schedule main process in step 605d. The transmitted forced termination notification is received in step 607 by the schedule main process.

In step 606, a notification from the process started in steps 603 and 605 and a schedule data change occurrence report wait are performed.
At 07, these notifications are received. In step 608,
If the received notification is a schedule data change occurrence report, the process returns to step 601 to re-enter the schedule.

In step 609, if the received notification is the report of the notification of the arrival at the plan end time, the plan end processing is performed. In step 610, it is determined whether or not the next power-on time is set. If not, an off request is transmitted to the power control unit (step 613), and the process ends. If the next power-on time is set, the next power-on time, startup grace time,
The power-off time is calculated based on the current time (step 6).
11) If the time is shorter than the minimum off-interval time, the power is not turned off, and the process returns to the step 601. If it is longer than the minimum off-interval time, an off request is made to the power control unit to turn on the power at the next power-on time.

FIG. 7 is a diagram showing an example of a schedule display according to the present embodiment. As shown in FIG. 7, the schedule data is displayed on a daily basis.

FIG. 8 shows step 508 in FIG. 5 of the present embodiment.
7 is a flowchart showing a processing procedure of a process of calculating the operating time of the manager of FIG. First, work variables are initialized (step 801). It is determined whether the data processing for the specified number of generation days has not been completed and agent data exists (step 80).
2). If the conditions are satisfied, the agent schedule information on the specified day (the processing execution date + I day) is acquired, and it is determined whether the agent schedule information has been acquired (steps 803 and 804). If the information has been obtained, bit information in one-minute units is generated based on the information obtained in step 803.

Next specified date (processing execution date + I day)
The manager schedule information is obtained, and it is determined whether the manager schedule information has been obtained (steps 806 and 807). If it can be obtained, bit information is generated in one-minute units based on the information obtained in step 806.

In step 809, the logical sum of the information generated in steps 805 and 808 is calculated, and the result is stored as bit information of the manager schedule. In step 811, "1" is added to I, and the process returns to the determination in step 802. If it is determined in step 807 that the information has not been acquired, in step 812, the agent schedule bit information is stored in the manager schedule bit information. After the storage, the process of step 810 is performed.

If the agent schedule information cannot be obtained in step 804, a flag indicating that the agent schedule information has been lost is set in step 813, and the process of step 811 is performed.

If the condition is not satisfied in the judgment in step 802, the loop counter is initialized (step 81).
4), it is determined whether the loop has been performed for the number of days generated (step 815). Here, if the loop is performed for the number of generated days, the generated bit data of J is converted into schedule data of the processing execution date + J day, and the generated data is stored (step 816). Then, “1” is added to the loop counter (step 817), and the process returns to the determination of step 815. If it is determined in step 815 that the loop for the generated number of days has been performed, the processing ends.

As described above, according to the computer power supply scheduling system of this embodiment, the power on / off schedule of the shared computer is determined according to the power on / off schedule of each user computer. It is possible to have an independent power schedule for a server or the like, and to set a power schedule for a shared computer shared by user computers that are independently operated according to the user computer.

[0063]

According to the present invention, the power-on / off schedule of the shared computer is determined according to the power-on / off schedule of each user computer. It is possible to set the power schedule of the shared computer shared by the user computers operated in accordance with the user computer.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of an entire system according to an embodiment.

FIG. 2 is a diagram showing an internal configuration of a manager computer 101 and an agent computer 102 according to the embodiment.

FIG. 3 shows the manager schedule data 204, agent schedule data 206,
FIG. 9 is a diagram showing an example of schedule data stored in agent schedule data 211.

FIG. 4 is a diagram showing a communication sequence between an agent and a manager according to the embodiment.

FIG. 5 is a flowchart illustrating a processing procedure of a manager schedule generation unit 205 of the manager computer 101 according to the present embodiment.

FIG. 6 is a flowchart illustrating a processing procedure of a schedule management unit 207 according to the present embodiment.

FIG. 7 is a diagram illustrating an example of a schedule display according to the embodiment;

FIG. 8 is a flowchart illustrating a processing procedure of a process of calculating an operating time of a manager in step 508 of FIG. 5 according to the embodiment;

[Explanation of symbols]

101: manager computer, 102: agent computer, 204: manager schedule data, 206:
Agent schedule data, 209: power supply control device, 211: agent schedule data, 216
... power control device, 201 ... schedule display unit, 202
... Agent schedule monitoring unit, 203 ... Manager communication unit, 205 ... Manager schedule generation unit, 2
07: schedule management unit, 208: power supply control unit, 21
2. Schedule display unit, 213 schedule management unit, 214 power control unit, 215 schedule definition unit, 217 agent communication unit, 301 schedule request date, 302 request contents, 411 change notification, 412 Report reception, 413: Schedule data transmission request reception, 414 ... Change schedule data transmission, 4
15: Report acceptance, 421: Notification reception, 422: Change occurrence reception report, 423: Notification reception report, 424: Change schedule data transmission request, 425: Schedule data reception, 426: Schedule data registration, 427: Notification reception report.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Motoaki Hirabayashi 5030 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Software Division of Hitachi, Ltd. 81 Hitachi Software Engineering Co., Ltd. In-house (72) Inventor Akio Hashimura 6-81 Onoe-cho, Naka-ku, Yokohama-shi, Kanagawa Prefecture Hitachi Software Engineering Co., Ltd. In-house F-term (reference) 5B011 KK02 MA01 MA12

Claims (5)

[Claims] 1. A computer power supply scheduling method for controlling the power supply of a shared computer shared by a plurality of user computers, wherein user computer schedule data indicating power on / off of each user computer is acquired and registered. User, the time at which the power of all user computers is turned off, and the time at which the power of the user computers is first turned on from the state where the power of all user computers is off is registered by the registered user. Generating shared computer schedule data indicating on / off of the power of the shared computer obtained from the computer schedule data, and turning on / off the power of the shared computer in accordance with the generated shared computer schedule data. Characteristic computer power supply scheduling method. 2. The method according to claim 1, wherein when the interval from power-off to power-on of the shared computer indicated by the generated shared computer schedule data is shorter than a predetermined time, power-off and power-on of the shared computer is suppressed. A computer power supply scheduling method according to claim 1. 3. The shared computer schedule data is acquired when the user computer schedule data is changed, and the shared computer schedule data is regenerated using the changed content. The computer power supply scheduling method described in any of the above. 4. In a computer power supply scheduling system for controlling the power supply of a shared computer shared by a plurality of user computers, user computer schedule data indicating power on / off of each user computer is acquired and registered. The schedule monitoring unit and the time at which the power of all the user computers are turned off and the time at which the power of the user computers are turned on for the first time from the state where the power of all the user computers are turned off are registered. A schedule generation unit that generates shared computer schedule data indicating on / off of the power of the shared computer obtained from the user computer schedule data, and a schedule management that turns on / off the power of the shared computer according to the generated shared computer schedule data And a computer power supply scheduling system. 5. A computer-readable recording medium storing a program for causing a computer to function as an electronic computer power supply scheduling system for controlling the power supply of a shared computer shared by a plurality of user computers. A schedule monitoring unit that acquires and registers user computer schedule data indicating power on / off, a time at which all user computers are turned off, and a state where all user computers are turned off. A schedule generation unit that first obtains a time at which the power of the user computer is turned on from the registered user computer schedule data and generates shared computer schedule data indicating power on / off of the shared computer; Power on / off shared computer according to shared computer schedule data Recording medium characterized by recording a program for causing a computer to function as a schedule management unit for performing.