JPH11265364A - Computer cluster device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it unnecessary to execute data conversion by matching specifications by an I/O circuit like conventional technique because a connection circuit is directly connected to a system bus, to suppress a delay of data transfer at the time of transmitting/receiving data to/from other computers and to shorten latency. SOLUTION: The computer cluster device is provided with a connection circuit 18 loaded on an extended memory slot 14 directly connected to a CPU 15 in each of PCs 11a to 11d through a system bus and including an extended memory for storing data to be transmitted to other PCs, connection wirings 2 connected to the circuit 18 and a connection bus 13 for connecting respective connection wirings 12. When transmitting data are stored in the slot 14, the circuit 18 acquires a connection bus 13 corresponding to another PC to which data are to be sent and transmits transmitting data to the other PC to which the data are to be transmitted through the acquired connection bus 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer cluster device configured by connecting a plurality of commercially available computers used for a personal computer or a workstation in parallel.

[0002]

2. Description of the Related Art FIG. 13 shows, for example, "PC and Gigabit LA".
N is a block diagram showing a conventional computer cluster device shown in "Information Processing Society of Japan Computer Architecture Research Group ARC119-7, issued on August 27, 1996". Is a commercially available computer (hereinafter, referred to as PC) used for a personal computer or a workstation, and 2 is a switch circuit for connecting the PCs 1a to 1d. FIG. 3 is a block diagram showing details of the PC. In the figure, reference numeral 15 denotes a central processing unit (hereinafter, referred to as a CPU), 16 denotes a memory, and 17 denotes an input / output circuit.

Next, the operation will be described. For example, PC
If you want to send data from 1a to PC1b,
The data to be transmitted is extracted from the data stored in the memory 16 by the CPU 15 in a and sent to the input / output circuit 17 via the system bus. Further, the CPU 15 sends the fact that the destination PC is the PC 1b to the input / output circuit 17 via the system bus. The input / output circuit 17 performs data conversion by software in accordance with the specification of the data transmission path after the input / output port, and outputs the converted data to the input / output port. In the switch circuit 2, first, in accordance with the data from the input / output port, the PC 1 designated as the input / output port of the PC 1a to which the data was transmitted.
b, the input / output port of the PC 1a, the input / output port, the switch circuit 2, and the PC 1b
PC1b via the input / output port of the
Is transferred to the input / output circuit 1 of the PC 1b.
7 to the memory 16. Since the operation of the switch circuit 2 is accelerated, the PCs 1a to 1a
When transferring a large amount of data between 1d, high-speed transfer can be realized. In other words, high throughput (data transfer amount per unit time) is guaranteed.

[0004]

Since the conventional computer cluster device is configured as described above, a high throughput is guaranteed by the high-speed operation of the switch circuit 2, but the data is transferred between the PCs 1a to 1d. Must be converted by the input / output circuit 17 in accordance with the specifications. This data conversion takes time,
The time required for the first data to arrive at the transmission destination PC becomes longer, resulting in a longer data transfer time.
In other words, there was a problem that the latency was long. In particular, when transferring a small amount of data between the PCs 1a to 1d, there is a problem that since the latency is long, transfer cannot be performed more effectively than when transferring a large amount of data.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to obtain a computer cluster device in which the delay time of data transfer between computers is reduced.

[0006]

A computer cluster device according to the present invention is provided in an extended memory slot directly connected to a central controller of a plurality of computers via a system bus, and transmits and receives data to and from another computer. And a data transmission path for connecting connection circuits of a plurality of computers and transmitting data for transmission and reception.

A computer cluster device according to the present invention is provided in an extended memory slot directly connected to a central control device of a plurality of computers via a system bus, and provided in an extended memory slot for transmitting and receiving to and from another computer. A connection circuit to be connected, a connection wiring connected to the connection circuit, and a connection bus connecting between the connection wirings, wherein the connection circuit holds transmission data in an extended memory slot. In addition, a connection bus corresponding to another computer to be transmitted is acquired, and transmission data is transmitted to another computer to be transmitted via the connection wiring and the acquired connection bus.

A computer cluster device according to the present invention is provided in an extended memory slot directly connected to a central controller of a plurality of computers via a system bus, and is provided in an extended memory slot for transmitting and receiving to and from another computer. The connection circuit to be connected, the connection wiring connected to the connection circuit, and the connection between the connection circuit of the connection circuit and the connection circuit of the computer to be transmitted when the computer to be transmitted from the connection circuit is specified. And a switch circuit for connecting to the wiring for the connection, the connection circuit specifies another computer to be transmitted when the data for transmission is held in the slot for the extended memory to the switch circuit,
The transmission data is transmitted to another computer to be transmitted via the connection wiring and the switch circuit.

A computer cluster device according to the present invention is provided in an extended memory slot directly connected to a central controller of a plurality of computers via a system bus, and is provided in an extended memory slot for transmitting and receiving to and from another computer. A connection circuit for performing connection, and connection wiring for connecting the connection circuits of a plurality of computers in a ring shape, wherein the connection circuit is formed in a ring shape at the time of transmission and when other computer data to be transmitted is held. Transmit the transmission data and other computer data to be transmitted to a plurality of computers in order through the connected connection wiring,
The receiving computer holds the transmission data in its own connection circuit when the computer corresponds to other computer data to be transmitted.

In the computer cluster device according to the present invention, in the connection circuit, when transmission data is held in the extended memory slot, all the other computers are designated to transmit the transmission data to all the other computers. Broadcast.

In the computer cluster device according to the present invention, in the connection circuit, when transmission data is held in the extended memory slot, another specific plurality of computers are designated and transmitted to another specific computer. This is to multicast data.

In a computer cluster device according to the present invention, at least one of a plurality of computers is used as an input / output computer and the other computers are used as operation computers. And an input / output circuit connected directly to the input / output circuit, and input / output wiring for inputting / outputting data between the input / output computer and the outside.

According to the computer cluster device of the present invention, the input / output computer monitors the operation load of a plurality of operation computers, and when data is input from outside, the data is sent to the operation computer having the smallest operation load. And a load monitoring means for requesting calculation.

A computer cluster device according to the present invention includes a switch circuit for connecting a connection circuit and a connection circuit of a computer to be transmitted when a computer to be transmitted is designated from the connection circuit. Specifies the other computer to be transmitted to the switch circuit when the data amount of the transmission data is large, transmits the transmission data to the other computer to be transmitted through the switch circuit, and sets the data amount of the transmission data. Is small, the transmission data is transmitted to another computer to be transmitted via the connection wiring.

In a computer cluster device according to the present invention, in a connection circuit, when a failure occurs in one of the switch circuit and the connection wiring in the data transmission path, the transmission data is transmitted using the other data transmission path. Is what you do.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a block diagram showing a computer cluster device according to a first embodiment of the present invention. In the drawing, reference numerals 11a to 11d denote commercially available computers (hereinafter, referred to as PCs) used for personal computers or workstations, and 12. Are connection wires (data transmission paths) connected to the PCs 11a to 11d, respectively.
Reference numeral 3 denotes a connection bus (data transmission path) for connecting the connection wires 12 to each other. FIG. 2 is a block diagram showing an extended memory slot in each PC. In FIG. 2, reference numeral 14 denotes an extended memory slot. It is provided as a pedestal for inserting a commercially available expansion memory on a substrate. FIG. 3 is a block diagram showing the details of the PC.
The detailed configuration of C is the same as that of the prior art. In the figure, reference numeral 15 denotes a central processing unit (hereinafter, referred to as a CPU);
Is a memory, and 17 is an input / output circuit. As shown in FIG. 3, the extended memory slot 14
It is directly connected to U15 via a system bus. Further, in FIG. 2, reference numeral 18 denotes an extended memory slot 14.
And a connection circuit provided with an extended memory for holding data for transmission and reception with another PC. The connection wiring 12 is connected to a connection circuit 18.

Next, the operation will be described. For example, FIG.
The case where data is to be transmitted from the PC 11a to the PC 11b shown in FIG. FIG. 4 shows PC11a to PC11.
FIG. 19B is an explanatory diagram showing an operation in the case of transmitting data to the destination PC 11a, where 19a is a memory map of the transmission source PC 11a, 19b is a memory map of the transmission destination PC 11b, and in any of the memory maps 19a and 19b,
A memory area of the memory 16 itself and a memory area set in the connection circuit 18 of the extended memory slot 14 are provided. When data is to be transmitted from the PC 11a to the PC 11b, data to be transmitted is extracted from the data stored in the memory 16 by the CPU 15 in the PC 11a and set in the connection circuit 18 of the expansion memory slot 14 via the system bus. The number corresponding to the destination PC 11b and the data to be transmitted are written in the memory area in order, starting from the specific memory address and continuing to the address. Then, the connection circuit 18 of the transmission source PC 11a
Detects this writing and first acquires the connection bus 13. After acquiring the connection bus 13, the transmission source PC 11
The connection circuit 18a transmits data to the transmission destination PC 11b via the connection wiring 12 of the transmission source PC 11a, the connection bus 13, and the connection wiring 12 of the transmission destination PC 11b. The connection circuit 18 of the transmission destination PC 11b recognizes the data reception, and connects the connection circuit 1 of the extended memory slot 14.
Then, the data is written to the memory area set to 8.

Next, a case where the data of the PC 11b is read by the PC 11a will be described. FIG. 5 is an explanatory diagram showing an operation when the data of the PC 11b is read out by the PC 11a.
A memory map a and a memory map 20b of the read destination PC 11b. When the data of the PC 11b is to be read by the PC 11a, the CPU 15 in the PC 11a uses the CPU 15 in the connection circuit 18 of the extended memory slot 14 via the system bus to store the number corresponding to the read destination PC 11b and the data to be read by the PC 11b. PC1
Write the address of its own memory area of 1b. Then, the connection circuit 18 of the read source PC 11a detects this writing, and first acquires the connection bus 13. After acquiring the connection bus 13, the connection circuit 18 of the read source PC 11a transmits data to the read destination PC 11b. The connection circuit 18 of the read destination PC 11b recognizes the reception of the data, and writes the data to the memory area set in the connection circuit 18 of the extended memory slot 14. Thereafter, according to the address set in the connection circuit 18 by the CPU 15 in the PC 11b, the memory 16
Then, data to be transmitted is written to the memory area set in the connection circuit 18 of the extended memory slot 14 via the system bus. Further, data is transmitted to the read source PC 11a, and
The connection circuit 18a recognizes the reception of the data and writes the data in the memory area set in the connection circuit 18 of the extended memory slot 14.

As described above, according to the first embodiment, the connection circuit 18 is provided in the expansion memory slot 14 of the commercially available PCs 11a to 11d or the workstation, so that the connection circuit 18 is directly connected to the system bus. It is not necessary to perform data conversion according to the specification by the input / output circuit 17 unlike the prior art, and it is possible to suppress a delay in data transfer at the time of transmission / reception to / from another PC, thereby shortening the latency. be able to. In particular, when transferring a small amount of data between the PCs 11a to 11d, effective transfer can be performed because the latency is short.

Embodiment 2 FIG. 6 is a block diagram showing a computer cluster device according to a second embodiment of the present invention. In FIG. 6, reference numeral 2 denotes a connection circuit 18 of a transmission source PC.
This is a switch circuit for connecting the connection wiring 12 of the connection circuit 18 and the connection wiring 12 of the connection circuit 18 of the transmission destination PC when the transmission destination PC is designated from. The other configuration is the same as that of the first embodiment, and the description thereof will not be repeated.

Next, the operation will be described. Embodiment 1
In the above, for example, when transmitting data from the PC 11a to the PC 11b, the data is transmitted via the connection bus 13, but in the second embodiment, the data is transmitted via the switch circuit 2. FIG. 7 is a conceptual diagram showing details of the switch circuit 2, which is a switch circuit called a crossbar. P
If you want to send data from C11a to PC11b,
In the memory area set in the connection circuit 18 by the CPU 15 in the PC 11a, the number corresponding to the destination PC 11b and the data to be transmitted are written. Then, the connection circuit 18 of the transmission source PC 11a detects this writing, and first, the switch circuit 2 sends the transmission destination PC 11a
The number corresponding to b is notified. In the switch circuit 2, as shown in FIG. 7, the transmission source PC 11a and the transmission destination PC 11b
Connect. Then, the connection circuit 1 of the transmission source PC 11a
8 transmits data to the transmission destination PC 11b via the connection wiring 12 of the transmission source PC 11a, the switch circuit 2, and the connection wiring 12 of the transmission destination PC 11b.

As described above, according to the second embodiment, in addition to the effect of the first embodiment, it is not necessary to obtain the connection bus 13 and control can be facilitated.

Embodiment 3 FIG. FIG. 8 is a block diagram showing a computer cluster device according to Embodiment 3 of the present invention. In the figure, reference numeral 21 denotes a connection wiring (data transmission path) for connecting the connection circuits 22 of the PCs 11a to 11d in a ring shape. is there. FIG. 9 is a block diagram showing an extended memory slot in each PC. In FIG. 9, reference numeral 22 denotes an extended memory slot provided in the extended memory slot 14 and an extended memory for holding data for transmission / reception with another PC. This connection circuit 22 is connected to another P circuit.
When transmitting data to C, in addition to the data to be transmitted, a number corresponding to another transmission destination PC is transmitted in a packet format. Reference numeral 23 denotes a destination comparison circuit provided in the connection circuit 22 and holding the data in the connection circuit 22 when the PC number received in the packet format corresponds to the own PC. The other configuration is the same as that of the first embodiment, and the description thereof will not be repeated.

Next, the operation will be described. In the third embodiment, as shown in FIG. 8, the PCs 11a to 11d are connected in a ring shape by the connection wiring 21. For example, when data is to be transmitted from the transmission source PC 11a to the PC 11b and the PC 11d, the PC 11a In addition to the data to be transmitted, the connection circuit 22 transmits numbers corresponding to the destination PCs 11b and 11d to the connection wiring 21 in packet format. First, the PC 11d receives data in packet format via the ring-shaped connection wiring 21.
The destination comparison circuit 23 of the PC 11d compares whether the PC number received in the packet format corresponds to its own PC. In this case, since the PC number corresponds, the received data is held in its own connection circuit 22,
Further, the packet data is transmitted to the connection wiring 21. In this way, the packet format data is transmitted to the PCs 11c and 11b, and the data is transmitted to the PCs 11b and 11d corresponding to the PC numbers.

As described above, according to the third embodiment, in addition to the effect of the first embodiment, it is not necessary to obtain the connection bus 13 and control can be facilitated.

Embodiment 4 The fourth embodiment is different from the first to third embodiments in that any PC
To broadcast the same data to all other PCs.

Next, the operation will be described. For example, PC
In the case of transmitting the same data from 11a to all other PCs, in the configuration of the first embodiment, the connection circuit 18
Between PC11a and PC11b, PC11a and PC11c
Bus 13 for connection between PC 11a and PC 11d
And then transmitting the same data. Further, in the configuration of the second embodiment, the switch circuit 2 shown in FIG.
And PC11b, PC11c and PC11d,
This can be realized by transmitting data. Further, in the configuration of the third embodiment, the destination PC out of the packet format data transmitted from the connection circuit 22 of the PC 11a.
PC11b, PC11c and PC1
1d.

As described above, according to the fourth embodiment, in addition to the effects of the first to third embodiments, a small amount of data is transmitted from a specific PC to all other PCs at high speed. be able to.

Embodiment 5 The fifth embodiment is different from the first to third embodiments in that any PC
Is to multicast the same data to a plurality of other specific PCs.

Next, the operation will be described. For example, PC
In the case of transmitting the same data from PC 11a to PC 11b and PC 11c, in the configuration of the first embodiment, connection circuit 18 allows connection between PC 11a and PC 11b and PC 1b.
This can be achieved by acquiring the connection bus 13 between the PC 1a and the PC 11c and then transmitting the same data. In the configuration of the second embodiment, the connection circuit 18 connects the switch circuit 2 shown in FIG.
b and the PC 11c to transmit data. Further, in the configuration of the third embodiment,
The number corresponding to the destination PC in the packet format data transmitted from the connection circuit 22 of the PC 11a
11b and the PC 11c.

As described above, according to the fifth embodiment, in addition to the effects of the first to third embodiments, a small amount of data can be transferred from a specific PC to another specific plurality of PCs at high speed. Can be sent.

Embodiment 6 FIG. FIG. 10 is a block diagram showing a computer cluster device according to Embodiment 6 of the present invention. In the drawing, reference numeral 24a denotes an input / output PC (input / output computer), and reference numerals 24b to 24d denote arithmetic PCs (operation computer). , 25 are input / output wires connected to the input / output PC 24a. The input / output wiring 25 corresponds to the input / output port shown in FIG. The other configuration is the same as that of the first embodiment, and the description thereof will not be repeated.

Next, the operation will be described. In the sixth embodiment, one of the computer cluster devices is used as an input / output PC, data is input / output to / from external devices via the input / output wiring 25, and the other PC is used as an operation PC, and is dedicated to the operation. It is to let. Here, the input / output wiring 25 corresponds to the input / output port shown in FIG. 3, and data with the outside is transferred to the CPU 15 in the input / output PC 24a via the input / output wiring 25 and the input / output circuit 17. Processed by Data received from the outside into the input / output PC 24a is transmitted to the operation PCs 24b to 24d, processed by the operation PCs 24b to 24d, and then transmitted to the input / output PC 24a. Thereafter, the processing data can be transmitted from the input / output PC 24a to the outside.

As described above, according to the sixth embodiment, in addition to the effects of the first to third embodiments, data to be subjected to arithmetic processing and data after the arithmetic processing are input to the outside of the computer cluster device. Can output. Although the sixth embodiment has been described with the configuration in which the input / output wiring 25 is added to the configuration of the first embodiment, the second and third embodiments have been described.
A configuration in which the input / output wiring 25 is added to the configuration described above may be adopted.

Embodiment 7 FIG. FIG. 11 is a block diagram showing a computer cluster device according to Embodiment 7 of the present invention. In the figure, the input / output PC 24a monitors the operation load of the operation PCs 24b to 24d, and receives data from outside. PC for calculation with the smallest calculation load
And a load monitoring means for transmitting the data and requesting an operation. Reference numeral 26 denotes an operation PC 24b to 24d.
7 is a load display graph showing the calculation load of FIG. The other configuration is the same as that of the sixth embodiment, and the description thereof will not be repeated.

Next, the operation will be described. In the seventh embodiment, the load monitoring means of the input / output PC 24a
The computing load of the computing PCs 24b to 24d is constantly monitored.
The black portion of the load display graph 26 is the current load,
When data is externally received by the input / output PC 24a via the input / output wiring 25, the input / output PC 24a sends the data to the operation PC 24d with the smallest operation load in accordance with the operation load that is constantly monitored. Send data and request calculation. In this manner, the calculation loads of the calculation PCs 24b to 24d are equalized.

As described above, according to the seventh embodiment, the load monitoring means of the input / output PC 24a can equalize the calculation loads of the respective calculation PCs 24b to 24d, and can perform the calculation processing at high speed. .

Embodiment 8 FIG. FIG. 12 is a block diagram showing a computer cluster device according to an eighth embodiment of the present invention. In the configuration shown in the seventh embodiment, the switch circuit 2 shown in the second embodiment is provided.

Next, the operation will be described. In the eighth embodiment, when data is externally received by the input / output PC 24a via the input / output wiring 25, the input / output PC
At 4a, it is determined whether the received data amount is larger or smaller than a preset value, and when the data amount is larger, another PC 24b for operation via the switch circuit 2 is determined.
To the other computing PCs 24b to 2d via the connection bus 13 when the data amount is small.
The data is transmitted to 4d. In addition, each computing PC 24
When transmitting data also in b to 24d, when the data amount is large compared to a preset value, the data is transmitted to the input / output PC 24a or the other operation PCs 24b to 24d via the switch circuit 2. When the data is transmitted and the data amount is small, the input / output PC 2 is connected via the connection bus 13.
4a or the other PCs for calculation 24b to 24d. For example, an input / output PC 24a and an arithmetic PC
Those having a small amount of data, such as synchronous processing between the PCs 24b to 24d and monitoring the load on the PCs 24b to 24d in the input / output PC 24a, use the connection bus 13, and conversely, load the data between the PCs 24b to 24d. For a large amount of data, such as transmission of raw data for distribution, the switch circuit 2 is used.

As described above, according to the eighth embodiment, when the data amount is large, the switch circuit 2 is used, and when the data amount is small, the connection bus 13 is used. In addition, high-speed transfer can be performed with high throughput, and when the amount of data is small, high-speed transfer can be performed with low latency.

Embodiment 9 In the ninth embodiment, in the configuration of the eighth embodiment, the input / output PC 24a constantly monitors the states of the switch circuit 2 and the connection bus 13, and when a failure occurs in one of the data transmission paths, each operation is performed. The PCs 24b to 24d are notified that a failure has occurred in the data transmission path. Then, in the input / output PC 24a and the operation PCs 24b to 24d, when transmitting data,
Use the normal data transmission path.

As described above, according to the ninth embodiment, when a failure occurs in one data transmission path, the normal data transmission path can be used, and the reliability can be improved. .

[0043]

As described above, according to the present invention, the connection circuit is directly connected to the system bus, and it is not necessary to perform data conversion according to the specifications by the input / output circuit unlike the prior art. Delay in data transfer during transmission and reception with a computer can be suppressed, and latency can be shortened. In particular, when a small amount of data is transmitted between a plurality of computers, the effect is obtained that effective transfer can be achieved due to short latency.

According to the present invention, an effect is obtained that transmission data can be transmitted to another computer via the connection wiring and the acquired connection bus.

According to the present invention, there is no need to obtain a connection bus, and an effect that control can be facilitated is obtained.

According to the present invention, an effect that a small amount of data can be transmitted at high speed from a specific computer to all other computers can be obtained.

According to the present invention, there is an effect that a small amount of data can be transmitted from a specific computer to a plurality of other specific computers at a high speed.

According to the present invention, an effect is obtained that data to be processed and data after the processing can be input and output to and from the outside of the computer cluster device.

According to the present invention, the load monitoring means of the input / output computer makes it possible to equalize the operation load of each operation computer, thereby achieving an effect that the operation processing can be performed at high speed.

According to the present invention, when a failure occurs in one of the data transmission paths, the normal data transmission path can be used, and the effect of improving reliability can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a computer cluster device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing an extended memory slot in each PC.

FIG. 3 is a block diagram showing details of a PC.

FIG. 4 is an explanatory diagram showing an operation when data is transmitted from the PC 11a to the PC 11b.

FIG. 5 is an explanatory diagram showing an operation when the PC 11a reads data from the PC 11b.

FIG. 6 is a block diagram showing a computer cluster device according to a second embodiment of the present invention.

FIG. 7 is a conceptual diagram showing details of a switch circuit.

FIG. 8 is a block diagram showing a computer cluster device according to a third embodiment of the present invention.

FIG. 9 is a block diagram showing an extended memory slot in each PC.

FIG. 10 is a block diagram showing a computer cluster device according to Embodiment 6 of the present invention.

FIG. 11 is a block diagram showing a computer cluster device according to a seventh embodiment of the present invention.

FIG. 12 is a block diagram showing a computer cluster device according to an eighth embodiment of the present invention.

FIG. 13 is a block diagram showing a conventional computer cluster device.

[Explanation of symbols]

2 switch circuit, 11a to 11d PC (computer),
12, 21 connection wiring (data transmission path), 13 connection bus (data transmission path), 14 expansion memory slot, 15 CPU (central control unit), 17 input / output circuit, 18, 22 connection circuit, 24a input Output PC (input / output computer), 24b to 24d Operation PC (operation computer), 25 input / output wiring.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI G06F 15/177 G06F 15/16 470J 15/173 400S 15/16 470 400R H04L 12/40 H04L 11/00 320

Claims (10)

[Claims] 1. A plurality of computers used in a personal computer or a workstation, and extended memory slots directly connected to a central control unit of the computers via a system bus to transmit / receive data to / from other computers. And a data transmission path for connecting the connection circuits of the plurality of computers and transmitting the transmission / reception data. 2. A plurality of computers used in a personal computer or a workstation, an extended memory slot directly connected to a central control unit of the computer via a system bus, and a plurality of extended memory slots provided respectively. A connection circuit provided for transmitting and receiving to and from the other computer, a connection wire connected to each of the connection circuits, and a connection bus connecting the connection wires, The connection circuit obtains the connection bus corresponding to the other computer to be transmitted at the time of the transmission, and sends the connection bus and the other computer to be transmitted via the obtained connection bus to the other computer. A computer cluster device for transmitting the transmission data. 3. A plurality of computers used in a personal computer or a workstation, an extended memory slot directly connected to a central control unit of the computer via a system bus, and provided in each of the extended memory slots. Connection circuits provided for performing transmission and reception with the other computers, connection wirings respectively connected to the connection circuits, and a computer to be transmitted from the connection circuit when a computer to be transmitted is specified. A switch circuit for connecting the connection wiring of the connection circuit and the connection wiring of the connection circuit of the computer to be transmitted, wherein the connection circuit switches the other computer to be transmitted at the time of transmission by the switch. Circuit, and transmits the transmission data to another computer to be transmitted via the connection wiring and the switch circuit. A computer cluster device characterized by trusting. 4. A plurality of computers used in a personal computer or a workstation, an extended memory slot directly connected to a central control unit of the computer via a system bus, and provided in each of the extended memory slots. A connection circuit that performs transmission and reception with the other computers, and a connection wiring that connects the connection circuits of the plurality of computers in a ring shape, wherein the connection circuit includes:
At the time of the transmission and when other computer data to be transmitted is held, the transmission data and other computer data to be transmitted are sequentially transmitted to the plurality of computers via the connection wiring connected in a ring shape. A computer cluster device, wherein the receiving computer holds the transmission data in its own connection circuit when the computer corresponds to other computer data to be transmitted. 5. The connection circuit, when transmission data is held in an extended memory slot, designates all other computers and broadcasts the transmission data to all other computers. The computer cluster device according to any one of claims 2 to 4, wherein 6. A connection circuit, when transmission data is held in an extended memory slot, designates another specific plurality of computers and multicasts the transmission data to the other specific computers. The computer cluster device according to any one of claims 2 to 4, characterized in that: 7. At least one of the plurality of computers is used as an input / output computer and the other computers are used as arithmetic computers. The input / output computers are directly connected to a central control unit via a system bus. 7. An input / output circuit connected to the input / output circuit, and input / output wiring for inputting / outputting data between the input / output computer and the outside. The computer cluster device according to any one of the above. 8. An input / output computer monitors the operation load of a plurality of operation computers, and when data is input from outside, transmits the data to the operation computer having the lowest operation load and requests the operation. 8. The computer cluster device according to claim 7, further comprising a load monitoring unit that performs the load monitoring. 9. A switch circuit for connecting a connection circuit and a connection circuit of a computer to be transmitted when a computer to be transmitted is designated from the connection circuit, wherein the connection circuit comprises a transmission circuit. When the data amount of the credit data is large, another computer to be transmitted is designated to the switch circuit, and the data to be transmitted is transmitted through the switch circuit.
5. The computer cluster device according to claim 2, wherein when the data amount of the transmission data is small, the transmission data is transmitted to another computer to be transmitted via the connection wiring. 10. A connection circuit for transmitting transmission data by using a data transmission path of one of a switch circuit and a connection wiring when a failure occurs in the other data transmission path. Item 10. The computer cluster device according to item 9.