JP2967569B2 - Uninterruptible power system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an uninterruptible power supply, and more particularly to an uninterruptible power supply for backing up a power supply of a shared media device in a network.

[0002]

2. Description of the Related Art In recent computers, a cache system is often used to write / read data at a higher speed. This is because a memory as a high-speed temporary storage device is placed between a non-volatile medium (for example, a magnetic disk medium) where data is finally recorded and a processor unit that actually performs data processing, and data is stored on the memory element. In this method, when the load on the computer is low and when the system is stopped, the data on the memory is stored in a non-volatile medium to ensure high speed.

[0003] However, since this memory is a volatile element, the data cannot be transferred from the volatile element to the non-volatile medium in the case of an unexpected power failure such as a power failure in the cache system, and the data may be lost. There is. Therefore, in order to be able to store data in a memory in a non-volatile medium even if a power failure or the like occurs, a battery-backed uninterruptible power supply is rapidly spreading. The uninterruptible power supply detects a power failure, etc., and notifies it to the computer, so that the computer can store the data on the memory to the non-volatile medium within the time backed up by the battery of the uninterruptible power supply and transfer important data. It can be protected.

On the other hand, computers have been miniaturized, and cluster systems in which a plurality of miniaturized computers are connected by a network such as a LAN to distribute processing and perform processing equivalent to that of a large computer have been rapidly spreading. . The cluster system includes a plurality of computers and a shared non-volatile medium (hereinafter, abbreviated as a shared medium device) accessible from each computer.

[0005] Even in this cluster system, the above-described cache system is generally used, and when an uninterruptible power supply is connected to a shared medium device, all the computers store data in the memory when an unexpected power failure occurs. It is necessary to protect the data by storing it in a shared media device. That is, unexpected
Power failure, the internal battery of the uninterruptible power supply
Power supply to the shared media device by
While the battery runs out, the computer
By storing the data on the shared media device,
Data needs to be protected. Also, the uninterruptible power supply itself
If there is an abnormality in the battery,
Insufficient quantity) or FAN (blower) failure
From the uninterruptible power supply as soon as an
The power supply to the shared media device may be cut off
Even if an error occurs in the uninterruptible power supply itself,
Computer stores the data in the memory to the shared media device.
It is desired to make it. Note that the uninterruptible power supply is a shared medium
Regarding the form of supplying power to the equipment,
Power supply from the source device to the shared media device.
Any form may be used as long as it is possible. Simplest connection type
The state is a form by direct connection.

[0006]

FIG. 9 is a diagram showing a connection between an uninterruptible power supply and a computer in a conventional cluster system.

[0007] The conventional uninterruptible power supply 601 is equipped with a plurality of computers (computers A6
Currently, the means of notifying the computer 03A to the computer D 603D) is scarce, and the abnormal signal of the uninterruptible power supply 601 is currently connected to a plurality of cables via the signal branching device 602. With the current system, if the number of computers is up to several, the connection becomes complicated, but it can be managed somehow, but it is difficult to cope with a large-scale cluster system of tens of computers, and it is relatively easy to use LAN or the like. In addition, there is a demand for a method capable of notifying an abnormality without providing the computer with a special mechanism.

An object of the present invention is to provide an uninterruptible power supply having a function of notifying a computer connected to a LAN of a power supply abnormality of a shared medium device with a simple configuration.

[0009]

An uninterruptible power supply according to the present invention is an uninterruptible power supply for a network shared media device, comprising: a battery unit for supplying power when an external power supply is abnormal; Abnormality detecting means for detecting an abnormality of the unit, an ICMP unit for transmitting and receiving an ICMP packet, an interface unit for connecting the ICMP unit to a network, and the ICMP unit when the abnormality detecting means does not detect an abnormality. Eco received
-Echo response ICMP packet for request ICMP packet
To return the packet, the echo is needed when the abnormality detecting means has detected the abnormality, which received the ICMP portion
The echo response ICMP packet is
And control means for preventing the return of the packet.

[0010] The computer according to the present invention is characterized in that said echo
After transmitting a request ICMP packet to the uninterruptible power supply, the uninterruptible power supply sends the echo response ICMP
When the packet is not returned, the data on the volatile storage medium is transferred to the shared medium device.

An uninterruptible power supply according to the present invention is an uninterruptible power supply for backing up a power supply of a shared media device in a network. Abnormality detecting means for detecting an abnormality, an ICMP unit for transmitting and receiving an ICMP packet, and the ICMP unit and a LAN / WAN.
An interface unit for connecting to the conversion device; and an ICMP when the abnormality detecting means does not detect an abnormality.
Eco relative echo request ICMP packets received part
To return the over response ICMP packet, when said abnormality detecting means has detected the abnormality, the eco to the echo request ICMP packets received the ICMP portion
Control means for not returning a response ICMP packet .

[0012] In addition, the computer according to the present invention, the
The echo request ICMP packets from transmission over the LAN / WAN converter uninterruptible power supply described above, before the wireless power supply units via the LAN / WAN converter
When the echo response ICMP packet is not returned, the data on the volatile storage medium is transferred to the shared medium device.

Further, the uninterruptible power supply according to the present invention is an uninterruptible power supply for a shared media device in a network, wherein the battery unit supplies power when an external power supply fails.
An abnormality detection unit that detects an abnormality of the external power supply or the battery unit; a packet unit that transmits and receives a packet; an interface unit that connects the packet unit to a network; and the abnormality detection unit does not detect an abnormality. sometimes, to return the echo response packet to the echo request packet received in the packet unit, when said abnormality detecting means has detected the abnormality, the echo response to the echo request packet received in the packet unit Pa
And control means for preventing the return of the packet.

Furthermore, the computer according to the present invention, the
After transmitting the echo request packet to the uninterruptible power supply device, when there is no return of the echo response packet from the uninterruptible power supply device, the data on the volatile storage medium is transferred to the shared medium device. And

Further, an uninterruptible power supply according to the present invention is an uninterruptible power supply for backing up a power supply of a shared media device of a network, comprising: a battery unit for supplying power when an external power supply is abnormal; An abnormality detecting means for detecting an abnormality, a packet section for transmitting and receiving a packet, an interface section for connecting the packet section to a LAN / WAN conversion device, and a packet section when the abnormality detecting means has not detected an abnormality. part is returned echo reply packet to the echo request packet received, when the abnormality detecting means has detected the abnormality, the echo request packets received on the packet unit
Characterized in that it comprises a control means which does not return the echo response packet to and.

Furthermore, the computer according to the present invention, the
The echo request packet is sent to the uninterruptible power supply
After transmitting through the WAN converter, the echo is transmitted from the uninterruptible power supply via the LAN / WAN converter.
When the response packet is not returned, the data on the volatile storage medium is transferred to the shared medium device.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION

[Embodiment 1] FIG. 1 shows a functional block diagram of an uninterruptible power supply of the present invention. This device has a LAN interface unit 2 and an ICMP (Internet Control Message Protocol) unit 3
And a control unit 4 and an abnormality detection unit 5. In particular, according to the internal state detected by the abnormality detection unit 5, the control unit 4
To control ICMP from other machines connected to LAN
It is characterized by controlling a response to a packet.

Next, referring to FIG.
The response to the packet from the server will be described. FIG. 2 is an example when the uninterruptible power supply 1 of the present invention has not detected any abnormality.

The computer A 11 is a general computer capable of performing communication within a LAN by TCP / IP, and ICMP is supported as a standard. These TCs
ICMP on a computer that supports P / IP
A ping command is generally supported as a means for exchanging a test packet with the other party by using ping. Ping is a command that transmits a packet specified by ICMP to a specified partner and detects whether a response is returned, thereby determining whether the partner is operating or a normal communication path is in progress.

In the case of FIG. 2, since there is no abnormality, the control unit 4 instructs the ICMP unit 3 to be normal. In this state, the computer A 11 outputs pi
ng, the packet is sent via the LAN interface unit 2 to the ICMP packet.
Sent to unit 3. Since the ICMP unit 3 has received the normal notification from the control unit 4, the ICMP unit 3 generates a response packet for this packet and transmits the response packet to the computer A via the LAN interface unit 2. By this series of operations, the computer A 11 receives the response packet, so that the computer A 11
Can be detected as normal.

FIG. 6 shows the format of an ICMP packet. In FIG. 6, there are 32 bits in the width direction. FIG.
As shown in the figure, the ICMP packet has a next header value of 58.
Is a network layer protocol. The ICMP message type indicates the type of the ICMP message, and typical ICMP message types are determined as shown in Table 1.

[0022]

[Table 1] In general, in ping, the diagnostic side sends an ICMP packet of an echo request message having an ICMP message type value of 128, and the ICMP message type value is 12
It waits for the echo response ICMP packet of 9 to be returned. FIG. 7 shows a format of an ICMP packet of an echo request message, and FIG. 8 shows an IC of an echo response message.
This shows the format of the MP packet. In general, any data can be put in the data part of the ICMP packet of the echo request message. Normally, the data part of the ICMP packet of the echo response is included in the data part of the ICMP packet of the echo request message.
Contains a copy of the data portion of the packet.

FIG. 3 shows an example in which the uninterruptible power supply 1 detects some abnormality.

The contents of the abnormality include disconnection of the input power supply due to a power failure or power supply facility abnormality, insufficient charging capacity of the battery unit 6 (so-called low battery), failure of the uninterruptible power supply 1 in FAN, and the like. These abnormalities are detected by the abnormality detecting unit 5 and notified to the control unit 4, and the control unit 4 notifies the ICMP unit 3 that there is an abnormality.

In this state, the ICMP packet transmitted from the computer A 11 is transmitted to the LAN interface 2
However, the ICMP unit 3 does not generate / reply a response packet since the ICMP unit 3 has been notified of an abnormality from the control unit 4.

Therefore, the computer A 11 can detect that an abnormality has occurred in the uninterruptible power supply 1 because a response packet is not returned within a specified time, and if necessary, the abnormality such as data backup is performed. Can be started.

FIG. 4 shows an example in which there are three computers for which the state of the uninterruptible power supply 1 is to be monitored. Each computer periodically transmits an ICMP packet to the uninterruptible power supply 1 and continues to check whether or not there is a response, so that if any abnormality occurs in the uninterruptible power supply 1, the An abnormality can be detected, and processing for dealing with the abnormality can be started as necessary.

[Second Embodiment] FIG. 5 is a diagram showing a configuration of a second embodiment.

The LAN / WAN conversion device 8 is a device for connecting a terminal or the like having no LAN interface to the LAN, and is a general LAN connection device on the market.

In the present embodiment, the uninterruptible power supply 1 is RS23
It has a 2C interface unit 7 and is connected to a LAN via a LAN / WAN converter 8. LAN of the previous embodiment
Since the RS232C interface unit 7 can be configured with less expensive components compared to the interface unit 2, if the LAN / WAN conversion device 8 already exists, it can be configured at lower cost.

The method by which each computer detects an abnormality of the uninterruptible power supply 1 can be performed in exactly the same way as in the previous embodiment.

[0032]

As described above, according to the present invention, the abnormality detected by the uninterruptible power supply is notified to the computer connected to the LAN via the LAN. Since the connection is not complicated, an abnormality detected by the uninterruptible power supply can be notified to a plurality of computers by relatively easy means.

It is not necessary to support all protocols for data transfer such as TCP / IP.
Since only a part is required, no complicated circuit / control is required on the uninterruptible power supply side, and the uninterruptible power supply can be configured at a low cost.

Furthermore, recent computers use TCP / IP.
Is supported as standard, and inevitably also supports ICMP. Only a simple process of periodically transmitting / checking packets by ICMP needs to be added to this computer. No complicated mechanism is required.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of an uninterruptible power supply according to Embodiment 1 of the present invention.

FIG. 2 is a diagram showing an ICMP packet when the uninterruptible power supply according to the first embodiment of the present invention has not detected any abnormality.

FIG. 3 is a diagram illustrating an ICMP packet when the uninterruptible power supply according to the first embodiment of the present invention detects an abnormality.

FIG. 4 is a configuration diagram when a plurality of computers are connected to the uninterruptible power supply according to the first embodiment of the present invention.

FIG. 5 is a functional block diagram of an uninterruptible power supply according to Embodiment 2 of the present invention.

FIG. 6 is a diagram showing a format of an ICMP packet.

FIG. 7 is a diagram showing a format of an ICMP packet of an echo request.

FIG. 8 is a diagram showing a format of an ICMP packet of an echo response.

FIG. 9 is a configuration diagram of a LAN for coping with a power failure when an uninterruptible power supply according to a conventional example is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Uninterruptible power supply 2 LAN interface part 3 ICMP part 4 Control part 5 Abnormality detection part 6 Battery part 7 RS232C interface part

Claims (8)

(57) [Claims] 1. An uninterruptible power supply for a shared media device in a network, comprising: a battery unit for supplying power when an external power supply is abnormal; abnormality detecting means for detecting an abnormality of the external power supply or the battery unit; An ICMP unit for transmitting and receiving packets; an interface unit for connecting the ICMP unit to a network; and an echo response ICMP to an echo request ICMP packet received by the ICMP unit when the abnormality detection unit does not detect an abnormality. packet is sent back to, when the abnormality detecting means has detected an abnormality, the ICM
Control means for preventing the echo response ICMP packet from being returned in response to the echo request ICMP packet received by the P unit. 2. An uninterruptible power supply for backing up a power supply of a shared medium device in a network, comprising: a battery unit for supplying power when an external power supply is abnormal; and an abnormality detecting means for detecting an abnormality of the external power supply or the battery unit. An ICMP unit for transmitting and receiving an ICMP packet; an interface unit for connecting the ICMP unit to a LAN / WAN converter; and an echo request ICMP packet received by the ICMP unit when the abnormality detection unit does not detect an abnormality. Return an echo response ICMP packet to the ICM, and when the abnormality detecting means detects an abnormality, the ICM
Control means for preventing the echo response ICMP packet from being returned in response to the echo request ICMP packet received by the P unit. 3. After the echo request ICMP packet is transmitted to the uninterruptible power supply according to claim 1, when the echo response ICMP packet is not returned from the uninterruptible power supply, the data is stored in the volatile storage medium. A computer for transferring the data to a shared media device. 4. After transmitting the echo request ICMP packet to the uninterruptible power supply according to claim 2 via a LAN / WAN conversion device, the uninterruptible power supply transmits the LAMP to the uninterruptible power supply.
The echo response ICMP packet is transmitted through an N / WAN converter.
When return of packets is not, computer and transferring the data in the volatile storage medium in the shared medium device. 5. An uninterruptible power supply for a network shared media device, comprising: a battery unit for supplying power when an external power supply is abnormal; an abnormality detecting means for detecting an abnormality of the external power supply or the battery unit; a packet unit for transmitting and receiving, and an interface unit for connecting the said packet unit and the network, when the abnormality detecting means does not detect an abnormality, et respect echo request packet received in the packet unit
To return a call response packet, when said abnormality detecting means has detected the abnormality, before it receives the packet portion
Control means for preventing the echo response packet from being returned in response to the echo request packet . 6. An uninterruptible power supply for backing up a power supply of a shared media device in a network, comprising: a battery unit for supplying power when an external power supply is abnormal; and abnormality detecting means for detecting an abnormality of the external power supply or the battery unit. A packet section for transmitting and receiving a packet, an interface section for connecting the packet section to a LAN / WAN converter, and an echo request packet received by the packet section when the abnormality detecting means has not detected an abnormality. D
To return a call response packet, when said abnormality detecting means has detected the abnormality, before it receives the packet portion
Control means for preventing the echo response packet from being returned in response to the echo request packet . 7. After transmitting the echo request packet to the uninterruptible power supply according to claim 5, when there is no return of the echo response packet from the uninterruptible power supply, data on the volatile storage medium is returned. Computer to a shared media device. 8. After transmitting the echo request packet to the uninterruptible power supply according to claim 6 via a LAN / WAN conversion device, the uninterruptible power supply transmits the echo request packet to the LAN / WA.
A computer for transferring data on a volatile storage medium to a shared medium device when there is no return of the echo response packet via the N conversion device.