JPH08263178A - Power source disconnecting mechanism of computer network system - Google Patents

Abstract

PURPOSE: To turn off the power source of a server without placing any load on clients and interrupting processes from the clients to the server by turning off the power source of the server system after confirming that information on lagging-in users is all erased from a storage means. CONSTITUTION: A control circuit 15 once informed by a power source disconnection command detecting circuit 12 that a power-OFF indication is made checks the contents of a magnetic disk device 13 to know whether or not a user is lagging in. When a jogging-in user name and an idle time are recorded on the magnetic disk device 13, it is judged that there is the lagging-in user. When neither the lagging-in user name nor the idle time is recorded on the magnetic disk device 13, on the other hand, it is judged that there is no lagging-in user. Then the control circuit 15 instructs a power source disconnecting circuit 14 to turn off the power source of the server system 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power-off mechanism for a computer network system, and more particularly to a power-off mechanism for a computer network system that powers down a server system.

[0002]

2. Description of the Related Art In a conventional power-off mechanism for a computer network system including a server system and a client system, a power-off switch for the server system is used when the client system logs in to the server system. When an instruction to turn off the power is given by the above, the power of the server system is turned off even if the client system logs in to the server system and is in process.

Therefore, there is a problem that the processing of the client system is interrupted on the way.

Therefore, as a prior art for solving this problem, (1) Japanese Patent Laid-Open No. 5-197453 discloses that when a client turns off the power source, the server always asks for confirmation.
A network power-off management mechanism is disclosed in which the power is turned off after a response from the server confirms, and the server turns off the power after confirming that all the clients are powered off. ) JP-A-5
Japanese Patent Laid-Open No. 158585 discloses a power supply control system for a workstation in which a server issues a service connection request to a client and turns off the power supply only when there is no response to the service connection request.

[0005]

However, in both the prior arts (1) and (2), it is necessary for the client to make a response to the server, and there is a drawback that a load is applied to the client.

Therefore, an object of the present invention is to provide a power-off mechanism for a computer network system that can turn off the power of the server without imposing a load on the client and without interrupting the processing from the client to the server. is there.

[0007]

In order to solve the above problems, the present invention provides a power-off mechanism for a computer network system including a server system and a client system, and an instruction to turn off the power of the server system. Detecting means for detecting whether or not the information has been recorded, the information of the logged-in user is stored when the server system is logged in from the client system, and the information of the user is deleted when the server system is logged out; The power supply of the server system after it is detected by the detection means that the instruction to turn off the power of the server system is made and it is confirmed that all the information of the logged-in user stored in the storage means is erased. And a control means for disconnecting.

[0008]

The control means turns off the power of the server system after confirming that the information of the logged-in user is completely erased from the storage means.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a configuration diagram of an embodiment of a power-off mechanism of a computer network system according to the present invention.

The power-off mechanism of the computer network system comprises a server system 1, two client systems 2 and 3, and a network / transmission path 4 connecting the server system 1 and the client systems 2 and 3. . The number of client systems is not limited to two and may be one or three or more.

When the client systems 2 and 3 log in to the server system 1, data processing is started between the client systems 2 and 3 and the server system 1, and when logging out, the data processing ends.

The server system 1 also has a power-off control section 11 for controlling the power-off of its own system 1. Figure 2
FIG. 3 is a configuration diagram of a power-off control unit of the power-off mechanism. The power-off control unit 11 includes a power-off instruction detection circuit 12 that detects whether or not an instruction to turn off the power has been issued, a magnetic disk device 13 in which information of a user logged in from the client systems 2 and 3 is recorded, A power-off circuit 14 for executing power-off, a power-off instruction detection circuit 12,
It is composed of a magnetic disk device 13 and a control circuit 15 for controlling the power-off circuit 14.

The power-off instruction detection circuit 12 is a circuit for detecting whether or not a push button (not shown) for instructing power-off is pressed, and when this push button is pressed, a high level signal is pressed. If not, it is configured by a known circuit that outputs a low level signal to the control circuit 15.

The magnetic disk device 13 is a device for recording the information of the logged-in user. In this device 13, the logged-in user name and the idle time of each user logged in the server system 1, that is, the user lastly Information about the time that has elapsed since the user entered something is recorded.
Then, when the user logs out, the information of the user name and idle time of the user is erased by the control of an external CPU (not shown) or the like.

That is, when the user name logged in to the magnetic disk device 13 and the idle time are not recorded at all, it is understood that there is no processing request from the client to the server. Therefore, the control device 15 can confirm the presence or absence of the logged-in user by checking the contents of the magnetic disk device 13.

The magnetic disk device 1 is used as a storage means.
Although No. 3 is used, it is not limited to the magnetic disk device 13, and another device may be used as long as the device can record and erase. For example, a magneto-optical disk device, a magnetic tape device, etc. may be mentioned.

The power supply disconnecting circuit 14 is, for example, a relay (not shown) connected to the input side of a power supply (not shown), and the relay is activated by a signal output from the control circuit 15 to disconnect the power supply.

The control circuit 15 is, for example, a control circuit using a microcomputer. The operation of the control circuit 15 will be described with reference to the flowchart. FIG. 3 is a flowchart showing the operation of the control circuit.

First, when the control circuit 15 receives a notification of the power-off instruction from the power-off instruction detection circuit 12 in S1, the process proceeds to S2, in which the control circuit 15 checks the contents of the magnetic disk device 13 and the login user Check if there is. If the login user name and idle time are recorded in the magnetic disk device 13, it is determined that there is a logged-in user, and S2 is repeated.

On the other hand, if no login user name and idle time are recorded in the magnetic disk device 13 (or if the login user name and idle time are all erased), it is determined that there is no logged-in user, and S
In step 3, the control circuit 15 causes the power-off circuit 14 to turn off the power of the server system 1. This ends the operation.

[0021]

According to the present invention, the power is turned off after confirming that all the information of the logged-in user stored in the storage means has been erased, that is, the logged-in user has disappeared. It is possible to power off the server system without imposing a load and without interrupting the processing from the client system to the server system.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a power-off mechanism of a computer network system according to the present invention.

FIG. 2 is a configuration diagram of a power-off control unit of the power-off mechanism.

FIG. 3 is a flowchart showing an operation of a control circuit of the power supply disconnecting mechanism.

[Explanation of symbols]

 1 server system 2, 3 client system 4 network / transmission path 11 power-off control unit 12 power-off instruction detection circuit 13 magnetic disk device 14 power-off circuit 15 control circuit

Claims (3)

[Claims] 1. A power-off mechanism for a computer network system including a server system and a client system, the detection means detecting whether or not an instruction to turn off the power of the server system has been issued, and the server system. When the user logs in from the client system, the information of the logged-in user is stored, and when the user logs out, the information of the user is erased, and the detection unit is instructed to turn off the power of the server system. Is detected and it is confirmed that all the information of the logged-in user stored in the storage means is erased, and a control means for turning off the power supply of the server system. System power-off mechanism. 2. The power-off mechanism of a computer network system according to claim 1, wherein the information of the logged-in user stored in the storage means is a user name and an idle time of the user. 3. The power-off mechanism for a computer network system according to claim 1, wherein the storage means is a magnetic disk device.