JPH08227395A - Wide area information network system - Google Patents

Abstract

PURPOSE: To make it possible to connect one of duplex systems to the other system without confirming which computer in a duplex system is a main system at the time of transmitting information from one of the two duplex systems connected to a WAN. CONSTITUTION: In the wide area information network system(WAN) connecting plural duplex pairs of computers 1-1, 1-2, 1-4, 1-5 sharing a common disk to an LAN and connecting plural terminals to each of these computers, one of the duplexed computers is functioned as a main system and the other is functioned as a stand-by system. When the main system is stopped, the stand-by system succeeds the address of the main system and the computer in the stand-by system succeeds the function of the master system through the address of the main system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for realizing a dual system configuration system in an information wide area network system.

[0002]

2. Description of the Related Art Wide area network (hereinafter, WAN (Wide
A plurality of local area networks (hereinafter referred to as LAN (Local Area Net))
work)), when transmitting information between them, the sender needs to specify which computer in which network the transmission is to be performed.

A personal computer (hereinafter, PC (Pe
rsonal Computer) and engineering workstations (hereafter EWS (Enginering Workstati)
On a general-purpose computer called "on)", usually the network and all computers and terminals connected to the network are given a device-specific number or name called an address to recognize the communication destination. ing.

For example, FIG. 7 is a diagram showing a configuration example of a conventional single system. In FIG. 7, when a terminal 7-2 connected to the host computer 7-1 of the system A tries to transmit to a terminal 7-4 connected to the host computer 7-3 of the system B, the computer 7-1 becomes As the destination address, "ab
c @ TG-Mail. TOSHIBA. Co. An address of the form "jp" is attached to the transmission data for transmission.

Here, "TOSHIBA.Co.jp"
Indicates the address of system B, "TG-Mail" indicates the address of computer 7-3, and "abc" indicates the address of terminal 7-4. In this way, by specifying the computer connected to the network using the address, it is possible to individually transmit information to the corresponding computer or terminal.

[0006]

Such information transmission is supported by de facto standard (industry standard) software such as TCP / IP. At present, one computer has a unique address in principle. It is used. Therefore, the host computer connected to the WAN is connected to a terminal having a unique address to configure the system.

However, recently, as shown in FIG. 8, when one computer mode such as a control computer functions as a main system and the other computer functions as a standby system and the main system stops, the standby system becomes the main system. There has been a need for connecting a dual system that functions as a system to a WAN to perform information transmission and improve reliability.

In information transmission with the dual system, the transmitting side recognizes which computer is operating in the main system,
It is necessary to send data only to the computer running on the main system. This will be described in detail with reference to FIG. 8. From the terminal 8-1-1 to the host computer 8-1, WAN, host computer
Information is transmitted to terminal 8-3-1 through 8-3.

In this case, the terminal 8-1-1 must specify the address of the transmission partner as "8-3-1 @ 8-3.co.jp" and transmit. This not only burdens the transmission source, but also requires a means for confirming which of the host computers at the transmission destination is the main system.

The present invention has been made in order to solve the above-mentioned problems, and in transmitting information with a dual system connected to a WAN, it is necessary to confirm which of the dual systems is the main system each time. The purpose is to provide an information wide-area network system that can be connected.

[0011]

FIG. 1 is a block diagram of the present invention, which is a computer of an A system that constitutes a dual system.
1, 1-2 and mode monitoring processing of each computer 1-1-1, 1-2-1
And dual computer system address rewriting process 1-1-2, 1-
2-2, a database that stores the address of each computer (hereinafter referred to as DB (Database)) 1-1-3, 1-2-3,
Dual computer mode status information 1-1-4, 1-2-4 and WAN
1-3 and B system computer that constitutes a dual system
1-4, 1-5 and mode monitoring processing of each computer 1-4-1, 1-5-
1 and dual computer system address rewriting process 1-4-2,
1-5-2 and DB1-4-3 that stores the address of each computer
1-5-3 and dual computer mode status information 1-4-4, 1-5-4
Consists of

In the information wide area network system according to [Claim 1] of the present invention, a plurality of sets of computers each having a duplexed and shared disk are connected to a LAN, and each of these computers has a plurality of sets. In the information wide area network system to which terminals are connected, one of the duplicated computers functions as the main system and the other functions as the standby system, and when the main system stops, the standby system takes over the address of the main system, The computer of the standby system takes over the function of the main system via the address of the main system.

In the information wide area network system according to [Claim 2] of the present invention, in [Claim 1], a line is established between each computer and a line between the main computers that are communicating is disconnected. A line disconnection detecting means for detecting this is added, and a line reestablishing means for newly reestablishing the line between the main computers when the line is disconnected is added.

In the information wide area network system according to [Claim 3] of the present invention, in [Claim 2], a terminal automatic switching means for switching all terminals is added to the main computer.

In the information wide area network system according to [Claim 4] of the present invention, in [Claim 2], a computer address correspondence status recording means for recording the correspondence status of the address with respect to the main computer is provided. Configured.

[0016]

[Operation] In FIG. 1, when the computers 1-2 and 1-4 are operating in the main system mode and the computers 1-1 and 1-5 are operating in the standby mode, the computer 1-2 is stopped and the computer 1- Consider the case where 1 starts operating as the main system.

The dual computer mode monitoring processing 1-1-1 is 2
When monitoring the mode status information 1-1-4 of the heavy-duty computer and judging that the computer that was operating in the standby mode has transitioned to the main-system mode, this is notified to that effect. Notify 2. The dual computer system address rewriting process 1-1-2 rewrites the standby mode address stored in the address DB1-1-3 of the computer newly transited to the master mode to the master mode address.

On the other hand, in the computer 1-2, the dual computer mode monitoring process 1-2-1 monitors the mode state information 1-2-4 of the dual computer and operates the computer in the standby mode. When it judges that the system has changed to the standby mode, it notifies the dual computer system address rewriting process 1-2-2.

Duplex computer system address rewriting processing 1-
2-2 is the address D of the computer that has newly transitioned to the main system mode
Rewrite the main mode address saved in B1-2-3 to the standby mode address.

As a result, the address of the main computer is always constant, and the B system connected via WAN1-3 does not need to be aware of which computer is operating in the main system mode. It becomes possible to transmit information using.

According to the first aspect of the present invention, the information wide area network system has a dual system in each of the A and B systems.
Here, consider a case where one of the respective systems operates in the main system mode, the other is the standby system, the main system of the A system stops, and the standby system starts operating as the main system. In this case, when the computer that was operating in standby mode transitions to the main system mode, the standby system (now the main system) takes over the address that the main system computer had, and the standby system becomes the main system. Take over the function of.

In the information wide area network system according to [Claim 2] of the present invention, the line disconnection detecting means detects that the line between the computers which has been established until now is disconnected, and the line reestablishing means. To establish a new line between the main computers.

In the information wide area network system according to [Claim 3] of the present invention, for example, if the computer of the main system is stopped due to a hardware failure or the like, the computer which has been the standby system until now becomes the main system. Although it starts up, the terminal automatic switching means becomes the new main system and automatically connects the started up computer and the terminal.

Since the information wide area network system according to [Claim 4] of the present invention has means for recording the correspondence status of the computer and the address, which host computer in the dual system is in the main system in which time zone. Statistical information can be obtained as if it was running as.

[0025]

2 is a block diagram of an embodiment of an information wide area network system according to the present invention. The A branch shown in FIG. 2 is the computer 2-1 and 2-2 that constitutes the A branch dual system.
And a database (hereinafter referred to as a DB (Database)) 2-3 for storing the address of each computer, terminals 2-1-1 to 2-1-n connected to each computer, and 2 It consists of a shared disk 2-5 shared between the heavy computers, a LAN 2-6 to which the dual computers are connected, and a WAN 2-7.

Similarly, the computers 2-8 and 2-9 constituting the dual system of the B branch, the databases 2-10 and 2-11 for storing the addresses of the computers, and the terminals 2-connected to the computers 2-
8-1 to 2-8-n, 2-9-1 to 2-9-n, shared disk 2-12 shared between the dual computers, and the dual computer are connected It consists of LAN2-13.

The operation of this embodiment will be described below with reference to FIG. Consider a case where the data A stored at the A branch is transmitted to the B branch. Here, assuming that the computers operating as the main system are 2-1 and 2-8, the data A stored in the shared disk 2-5 from the terminal 2-11 of the A branch is transferred to the terminal 2-8 of the B branch. Add the address to -1 and transmit. The address added at that time is "2-8-1 @ DB2-10.co.jp"
Is.

Further, the data A transmitted from the host computer 2-1 has an address DB2-10 assigned to the main mode computer of the host computer of the B branch, and is assigned to the B branch host computer 2-8. Is transmitted. Further host computer 2-8
Transfers data A to terminal 2-8-1.

On the other hand, if the main computer 2-8 of the B branch is stopped due to a hardware failure or the like, the computer 2-9, which was the standby system, operates as the main system. At this time, the calculator
The computer address of 2-8 is rewritten from DB2-10 to DB2-11, and the computer address of the host computer 2-9 is rewritten to DB2-10.

Considering transmitting the data B from the A branch to the B branch in this state, the data A follows the added address "2-8-1 @ DB2-10.co.jp".
Host computer 2-1, WAN2-7, B branch host computer 2-
9, transmitted to terminal 2-8-1.

According to this embodiment, the address of the main computer is always constant, and it becomes unnecessary for the external system to be aware of which computer is operating in the main mode. Therefore, the de facto standard such as TCP / IP is used. Information can be transmitted using software.

FIG. 3 is a block diagram of an embodiment of an information wide area network system according to [Claim 2] of the present invention. In FIG. 3, the same parts as those in FIG. In Figure 3, the host computer
It is a modification of the configuration of 3-1, 3-2, 3-3, 3-4.

That is, in addition to the configuration of FIG. 2, line disconnection detecting means 3-1-1 and 3-2- for detecting disconnection of the line between the main system computers communicating by establishing the line. 1, 3-3-1, 3-
4-1 and the addresses 3-1-3 and 3-3-3 assigned to the main system when the line is disconnected are transmitted, and the line is reestablished between the newly main computers. Establishment means 3-1-2, 3-2-
It is equipped with 2, 3-3-2 and 3-4-2.

The operation of this embodiment will be described below with reference to FIG. First, the host computer 3-1 operating as the main system
A line has been established between 3 and 3 and shared disk 2-
The data A stored in 5 is the terminal 2- of the host computer 3-1.
Consider the case of transmitting from 1-1 to terminal 2-8-1 of B branch.

When transmitting the data A, the line can be established and transmitted by transmitting "2-8-1 @ DB3-3-3.co.jp" as the destination address.
If the main computer of the B branch stops in the middle of transmission due to a hardware failure or the like, the computer 3-4, which was the standby system of the B branch, operates as the main system.

At this time, the computer address of the computer 3-4 is DB3-3-3 which is the address of the main system mode, and the computer 3-3
The computer address of is rewritten in DB3-4-3. At this time, in the sending host computer 3-1, the main computer-to-computer line disconnection detection means 3-1-1 detects that the lines of the mutual computers have been disconnected, and the line reestablishment means 3-1- Notify 2.

Upon receiving this, the line reestablishing means 3-1-2 receives the address "2-8-1@DB3-3-3.co.j" of the data transmission destination.
By transmitting "p", the line can be reestablished and the interrupted information transmission can be continued.

According to this embodiment, the address of the main system computer is always constant, and even if the main system computer and the standby system computer are switched during the information transmission, it is not necessary for the external system to be aware of it. Information can be transmitted using defect standard software such as TCP / IP.

FIG. 4 is a block diagram of an embodiment of the information wide area network system according to [Claim 3] of the present invention. 4, parts that are the same as or that correspond to those in FIG. 3 are given the same reference numerals, and descriptions thereof will be omitted. In Figure 4, the host computer
The configuration of 4-1, 4-2, 4-3, 4-4 is changed.

That is, in addition to the configuration of FIG. 3, automatic terminal switching means 4-1-1, 4-for switching all terminals to the main computer
It is equipped with 2-1, 4-3-1, 4-4-1.

The operation of this embodiment will be described below with reference to FIG. First, the host computer 4-1 operating as the main system
And establish a line between 4 and 3 and send data A stored in shared disk 2-5 from terminal 2-1-1 of host computer 4-1 to terminal 2-8-1 of B branch. Consider when to do. If the main computer of the B branch stops during transmission due to a hardware failure or the like, the computer 4-4, which was the standby system of the B branch, operates as the main system.

Since the main computer has stopped, the terminal of the B branch becomes unusable, but the automatic terminal switching means 4-4-1 is the host computer 4-4 newly started as the main computer and the B branch. Connect the terminal automatically. This gives 2
Data can be continuously transmitted to the terminal even if the mode of the heavy computer is switched.

According to this embodiment, since the terminal device is always connected to the main computer, even if the main computer and the standby computer are switched in the middle of information transmission, the transmission can be performed as usual.

FIG. 5 is a block diagram of an embodiment of an information wide area network system according to [Claim 4] of the present invention. 5, parts that are the same as or equivalent to those in FIG. 3 are given the same reference numerals, and descriptions thereof will be omitted. In this embodiment, the LAN system shown in FIG. 3 is provided with computer store correspondence status recording means 5-1 and 5-2 for recording the correspondence status between the computer and the address on the shared disk.

The operation of this embodiment will be described below with reference to FIGS. In the case where the operation statistics of each branch host computer connected to the WAN at the A branch is collected, whichever is used for the system such as the B branch shown in the above embodiment in which the main system address is dynamically switched? There is no way to collect statistical information such as when the host computer was operating as the main system.

To collect this statistical information, branch B is shown in FIG.
Means 5-3 and 5-4 for recording the correspondence status between the host computer and the address as described above are provided, and information is transmitted to the A branch which conducts operation statistics as necessary.

According to this embodiment, it is possible to collect operation statistical information for a system in which the main system address is dynamically switched.

[0048]

As described above, according to the present invention, when it is desired to perform information transmission while recognizing the computer mode, it is possible to perform transmission using a protocol that cannot recognize the computer mode.

[Brief description of drawings]

FIG. 1 is a configuration diagram of the present invention.

FIG. 2 is a configuration diagram of an embodiment of an information wide area network system according to claim 1 of the present invention.

FIG. 3 is a configuration diagram of an embodiment of an information wide area network system according to [Claim 2] of the present invention.

FIG. 4 is a configuration diagram of an embodiment of an information wide area network system according to claim 3 of the present invention.

FIG. 5 is a configuration diagram of an embodiment of an information wide area network system according to [Claim 4] of the present invention.

FIG. 6 is a diagram showing an example of a computer address correspondence status recording means shown in FIG.

FIG. 7 is a diagram illustrating a conventional technique of a single system.

FIG. 8 is a diagram illustrating a conventional technique of a dual system.

[Explanation of symbols] 1-1, 1-2 A system host computer 1-1-1, 1-2-1 mode monitoring processing 1-1-2, 1-2-2 dual computer system address rewriting processing 1-1-3, 1-2-3 Address storage DB 1-1-4, 1-2-4 Dual computer mode status information 1-3 WAN 1-4, 1-5 B system host computer 1 -4-1, 1-5-1 Mode monitoring processing 1-4-2, 1-5-2 Duplex computer system address rewriting processing 1-4-3, 1-5-3 Address storage DB 1-4 -4, 1-5-4 Duplex system mode status information 2-1, 2-2 Host computer of A branch 2-1-1 to 2-1-n Terminal of A branch 2-3 Main system of A branch Computer address 2-4 Standby computer address of A branch 2-5 Shared disk of A branch 2-6 LAN of A branch 2-7 WAN 2-8, 2-9 Host computer of B branch 2-8-1 to 2 -8-n B branch terminal 2-10 B branch main computer address 2-11 B branch standby computer address 2-12 B branch shared disk 2-13 B branch Shop lan

Claims (4)

[Claims] 1. An information wide area network system in which a plurality of sets of computers, each of which is duplicated and has a disk shared between them, is connected to a LAN, and a plurality of terminals are connected to each of these computers, is duplicated. One of the selected computers functions as the main system and the other functions as the standby system. When the main system stops, the standby system takes over the address of the main system, and the computer of the standby system becomes the main system via the address of the main system. An information wide area network system characterized by taking over system functions. 2. A line disconnection detecting means for detecting disconnection of a line between computers of a main system which establishes a line with each computer and communicates with each other, and when the line is disconnected, a new main system is established. The information wide area network system according to claim 1, further comprising a line re-establishing means for re-establishing a line between the computers. 3. The information wide area network system according to claim 2, wherein a terminal automatic switching means for switching all terminals is added to the main computer. 4. The information wide area network system according to claim 2, further comprising computer address correspondence status recording means for recording the correspondence status of the address with respect to the main computer.