JP2004070393A - Remote shutdown method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shutdown method of increasing the number of computers which can be shut down without changing the number of computers to be shut down from a UPS, nor and the performance and transmission procedure of a communication means. <P>SOLUTION: IF an input power source is abnormal, the UPS sends a shutdown instruction to some of computers connected to a network and a computer having received the shutdown instruction from the UPS sends a shutdown instruction to other computers connected to the network. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a remote shutdown method for transmitting a shutdown command from an uninterruptible power supply (UPS) to a computer to shut down the computer when an input power supply is abnormal.
[0002]
[Prior art]
A system configuration in which a plurality of computers and a UPS that supplies power to these computers are connected to a network, and when an abnormality occurs in input power, a shutdown command is transmitted from the UPS to the computers to shut down the computers. 5 is shown in FIG.
[0003]
In FIG. 5, 1 is a UPS, 2 is an input power source, 3 is a battery, 4 is a switching unit, 5 is a control unit, 6 is a communication unit, 7 is a shutdown command transmitting unit, 8 is an address storage unit, 9 is a power supply line, Numeral 10 denotes a communication line constituting a network, 11a to 11n denote computers, and 12 denotes a shutdown instruction receiving means. Note that the shutdown instruction receiving means 12 is also provided in the computers 11b to 11n, but is omitted in FIG. The address storage unit 8 stores the network addresses of all the computers 11a to 11n connected to the communication line 10.
[0004]
In such a configuration, normally, the switching means 4 is switched to the input power supply 2 side, and the input power supply 2 is supplied from the UPS 1 to the computers 11 a to 11 n via the switching means 4 and the power supply line 9. However, when an abnormality occurs in the input power supply 2, the control means 5 detects the abnormality in the input power supply 2 and sends a switching signal to the switching means 4. When the switching means 4 receives this switching signal, it switches from the input power supply 2 to the battery 3, and power is supplied to the computers 11 a to 11 n by the battery 3.
[0005]
When detecting an abnormality in the input power supply 2, the control means 5 transmits a shutdown command to the shutdown command transmission means 7 in the communication means 6. The shutdown command transmitting unit 7 that has received the shutdown command acquires the network addresses of the computers 11a to 11n stored in the address storage unit 8, and transmits the shutdown commands to the computers 11a to 11n via the communication line 10. The shutdown command receiving means 12 of each of the computers 11a to 11n performs a shutdown command receiving process according to the flowchart shown in FIG. That is, the shutdown command receiving means 12 monitors the presence or absence of the shutdown command (step S1). When the shutdown command is received (step S2), response data is transmitted to the UPS1 (step S3), and the own shutdown processing is performed. Is executed (step S4).
[0006]
After transmitting the shutdown command from the shutdown command transmitting means 7, the control means 5 switches the switching means 4 to a state in which the switching means 4 is not connected to any of the input power source 2 and the battery 3 after a preset delay time, and supplies power to the computers 11a to 11n. Abort.
[0007]
[Problems to be solved by the invention]
In the case of such a conventional system, it is assumed that a maximum of seven or eight computers are shut down. Therefore, when the transmission of the shutdown command and the confirmation of the response are one second per one, it takes a maximum of eight seconds. In the case of 5 seconds per unit due to a retry at the time of a communication error, the time is 40 seconds. Here, when the number of computers that can be shut down is to be increased, for example, when the number is to be increased to 40, it takes 200 seconds at the maximum. The backup time of the UPS1 is usually about 5 minutes, but this is based on the shutdown time of the OS of the computer, and it is not allowed to spend 200 seconds for transmission of the shutdown command and communication by confirming the response.
[0008]
As a method of shortening the communication time per unit, it is conceivable to improve the performance of the communication means 6 or reduce the number of transmission retries, but the former leads to an increase in hardware price, and the latter leads to a decrease in communication reliability.
In view of the above, an object of the present invention is to provide a shutdown method for increasing the number of computers that can be shut down without changing the number of computers shut down from the UPS, the performance of communication means, and the transmission procedure.
[0009]
[Means for Solving the Problems]
According to the present invention, in order to solve the above problem, according to the present invention, when an input power supply is abnormal, the UPS transmits a shutdown command to some of the computers connected to the network, and the UPS issues a shutdown command. The computer that has received the command transmits a shutdown command to another computer connected to the network.
[0010]
As a result, the UPS only sends a shutdown command to some computers, and the receiving computer sends the shutdown command, so that all the computers are shut down.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a system configuration diagram for implementing a remote shutdown method according to the present invention. In the figure, the same components as those in FIG. 5 are denoted by the same reference numerals, but the components different from those in FIG. 5 are an address storage unit 13 provided in the communication unit 6 and a shutdown command reception processing unit provided in the computers 11a to 11n. 14, a shutdown instruction distributed processing unit 15 and an address storage unit 16.
[0012]
The address storage means 13 provided in the UPS 1 stores network addresses of a predetermined number, for example, eight computers among a plurality (for example, 40) of computers 11a to 11n connected to the communication line 10. I have. On the other hand, in the address storage means 16 provided in the computers 11a to 11n, the network addresses of the computers other than the computers 11a to 11n connected to the communication line 10 are stored. .
[0013]
In this configuration, when an abnormality occurs in the input power supply 2, the control unit 5 detects the abnormality in the input power supply 2 and transmits a shutdown instruction to the shutdown instruction transmission unit 7 in the communication unit 6 in FIG. The operation is the same as the conventional one shown in FIG.
In the present invention, the shutdown command transmitting unit 7 that has received the shutdown command acquires the network addresses of some of the computers 11 a to 11 n stored in the address storage unit 13, and acquires the network addresses via the communication line 10. Send a shutdown command to the computer. Here, assuming that the network address of the computer 11a is stored in the address storage unit 13 and the network addresses of the computers 11b and 11n are not stored in the address storage unit 13, the shutdown instruction receiving unit 14 of the computer 11a The shutdown command receiving process is performed according to the flowchart shown in FIG. That is, the shutdown command receiving means 14 monitors the presence or absence of the shutdown command (step S1). When the shutdown command is received (step S2), response data is transmitted to the UPS1 (step S3), and the shutdown command distribution processing is performed. The means 15 is started (step S4).
[0014]
The shutdown command distribution processing means 15 of the computer 11a performs the shutdown command distribution processing according to the flowchart shown in FIG. That is, the shutdown command distributing means 15 acquires the first network address of the computer 11b from the address storage means 16 (step S1), and performs processing for transmitting a shutdown command to the computer 11b (step S2). FIG. 4 shows a flowchart of the transmission process of the shutdown command.
[0015]
In FIG. 4, after transmitting a shutdown command to the designated address read from the address storage means 16 (step S1), a response waiting timer is started (step S2) and responses are monitored (steps S3, S4). If there is no response within the predetermined time, the retry counter is counted up (step S5), and if the number of retries does not exceed the set value (step S6), the process returns to step S1 to transmit the shutdown command again to the specified address. . This process is repeated, and if there is no response even if the number of retries reaches the set value, a transmission error process is performed (step S7).
If a response is detected in step S3, a process of successful transmission is performed (step S8).
[0016]
Returning to FIG. 3, next to the transmission processing of the shutdown instruction, it is checked whether transmission of the shutdown instruction to all the computers stored in the address storage unit 16 has been completed (step S3). Returning to Sl, the network address of the next computer is obtained, and the same processing is repeated. Then, when the transmission of the shutdown command to the last computer 11n is completed, its own shutdown processing is performed (step S4).
[0017]
The computer that has received the shutdown command from the computer 11a performs the processing of FIGS. 2 and 3 in the same manner as the computer 11a, and performs its own shutdown processing. As described above, when each computer receiving the shutdown instruction performs the distributed processing of the shutdown instruction, each computer receives a plurality of shutdown instructions. It is configured not to receive the command.
[0018]
After transmitting the shutdown command to the computer in which the network address is stored in the address storage unit 13, the control unit 5 of the UPS 1 disconnects the switching unit 4 to neither the input power source 2 nor the battery 3 after a preset delay time. To stop the power supply to the computers 11a to 11n.
Since the processing speed of each computer is higher than the communication function of the UPS1, in FIG. 4, if the response waiting timer is set to 100 ms and the number of retries is set to a maximum of 5, it takes 500 ms per unit and the computer is connected to the communication line 10. If 40 computers are used, the process is completed in 20 seconds. On the other hand, in the present invention, only some of the computers transmit the shutdown command from the UPS1, and when the number of the computers is eight, the time for transmitting the shutdown command to the computer is as follows. It takes up to 40 seconds. Therefore, before the UPSl ends the shutdown instruction transmission process, the computer that has received the shutdown instruction from the UPSl has completed transmission of the shutdown instruction to each computer by the shutdown instruction distribution processing.
[0019]
In addition, since each computer receives a shutdown command from all other computers, it can monitor a communication failure with each computer, thereby improving reliability. Therefore, it is possible to reduce the number of retries of transmission processing of each computer, and it is also possible to reduce the maximum time required for transmission.
[0020]
【The invention's effect】
According to the present invention, a shutdown command is transmitted from the UPS to some computers, and a shutdown command is transmitted from the computer that has received the shutdown command to each of the other computers by a shutdown command distribution process. Even if the number of computers to be shut down is increased without changing the number of computers that send the shutdown command, the performance of the communication function, the transmission procedure, etc., all computers will be shut down in the same time as before. Can be shut down.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram for implementing a remote shutdown method according to the present invention; FIG. 2 is a flowchart of a shutdown instruction receiving process according to the present invention; FIG. 3 is a flowchart of a shutdown instruction distribution process according to the present invention; FIG. 5 is a system configuration diagram for implementing a conventional remote shutdown method. FIG. 6 is a flowchart of a conventional shutdown instruction reception process.
1 ... Uninterruptible power supply (UPS)
2 ... input power supply 3 ... battery 4 ... switching means 5 ... control means 6 ... communication means 7 ... shutdown command transmission means 8, 16 ... address storage means 9 ... Power line 10 Communication lines 11a to 11n Computers 12, 14 Shutdown instruction receiving means 15 Shutdown instruction distributed processing means

Claims (4)

A plurality of computers and an uninterruptible power supply that supplies power to these computers are connected to a network, and a shutdown command is transmitted from the uninterruptible power supply to the computer via the network when the input power is abnormal, In a remote shutdown method for shutting down a computer,
The uninterruptible power supply transmits a shutdown command to some of the computers when the input power is abnormal,
A remote shutdown method, wherein the computer that has received the shutdown command from the uninterruptible power supply transmits a shutdown command to another computer connected to the network, and then shuts itself down. 2. The remote shutdown method according to claim 1, wherein when each computer receives the shutdown command for the first time, the computer sends a shutdown command to another computer, and then shuts itself down. Remote shutdown method, which does not receive a message. 3. The remote shutdown method according to claim 1, wherein the computer transmits response data to a transmission source when receiving the shutdown instruction. 4. 4. The remote shutdown method according to claim 3, wherein the computer detects a communication failure based on response data.

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