JP2000293454A - Data communication device, data communication method, and recording medium - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a data communication device capable of guaranteeing a data transmission order. SOLUTION: The data communication device has one physical line L1.
The transmission-side node 1 and the reception-side node 2 are connected with each other, and three logical lines L2 to L4 are set in the physical line L1. The transmission-side node 1 has a plurality of transmission-side programs A-1 and A-2, and transmission sockets 11 to 13 provided corresponding to the respective logical lines L2 to L4. In addition, the transmitting node 1 has a line definition unit 15 for storing a line definition file 14 and an OLTP control unit 16. Since the correspondence between the destination program name and the names of the logical lines L2 to L4 to be used can be known from the line definition file, the logical nodes L2 to L4 to be used are determined according to this file. The order of the transactions sent to the node 2 can be guaranteed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transmitting a transaction which is a unit for performing a group of tasks.

[0002]

2. Description of the Related Art Distributed OLTP (Online Transaction Processi)
ng) In an environment, it is common to set up multiple logical OLTP lines within one physical line so that a large amount of transaction data can be transferred per unit time from the sending node to the receiving node. is there.

FIG. 4 is a block diagram showing a schematic configuration of a conventional data communication device. The transmitting node 1 and the receiving node 2 are connected by a physical line L1, and a plurality of logical lines L2, L3, L4 are set in the physical line L1. FIG. 4 shows three logical lines L2 connected to one physical line L1.
In the example shown in FIG.

[0006] Each of the logical lines L2 to L
4, a plurality of transmission sockets 11 to 13 are provided. Each of the transmission sockets 11 to 13 controls the transactions output from the transmission side programs A-1 and A-2 in a time-division manner and supplying the transactions to the corresponding logical lines L2 to L4.

[0005] Each of the logical lines L2 to L
4, a plurality of receiving sockets 21 to 23 are provided. Each of the receiving sockets 21 to 23 controls supply of a transaction sent from the corresponding logical line to the corresponding receiving side program B-1 or B-2.

As shown in FIG. 4, a plurality of logical lines L2 to L4 are set for one physical line L1 and a plurality of transactions are transmitted in a time-division manner, thereby obtaining the physical line L1.
1 can be used more efficiently.

In the conventional data communication device shown in FIG. 4, it is not determined which logical line is used when transferring a transaction, and the logical lines to be used are the logical lines L2 to L2.
4 dynamically changes depending on the use condition and the like. For this reason, the transmission side programs A-1, A-2 and the reception side programs B-1, B
-2 generally does not consider the logical line.

[0008]

When a plurality of logical lines L2 to L4 are set for one physical line L1, there is an advantage that the data transfer efficiency is improved, but which logical line is used at the time of transfer. However, there is the following disadvantage because it is not known.

When the transmitting side programs A-1 and A-2 simultaneously transmit a plurality of transactions asynchronously, these transactions are transferred to the receiving side via the vacant logical line, so that the transactions are transmitted in the order of transmission. It does not always reach the receiving side programs B-1 and B-2. Therefore, when the processing of the receiving side programs B-1 and B-2 depends on the transmission order of the transactions, a mechanism for rearranging the received transactions is required. This mechanism is often provided in the receiving programs B-1 and B-2,
The structure of the receiving side programs B-1 and B-2 becomes complicated. Also, the data transfer speed may be reduced.

[0010] The present invention has been made in view of the above points, and an object of the present invention is to provide a data communication device, a data communication method, and a recording medium that can guarantee the data transmission order. is there.

[0011]

In order to solve the above-mentioned problems, the present invention is directed to a transmitting node having a plurality of transmitting programs, a receiving node having a plurality of receiving programs, and a transmitting node. At least one physical line for data communication connecting the node and the receiving node, and setting a plurality of logical lines for each of the physical lines, from the transmitting node to the receiving node In a data communication device for transmitting data via any of the logical lines, the transmitting node describes a correspondence relationship between a name of a receiving program to which data is transmitted and a name of a logical line used when transmitting data. Table storage means for storing the data stored in the table, and data transmitted from any of the transmission programs, and a reception program as a transmission destination of the data. A destination detecting means for detecting a beam,
A line search unit for searching the table for a logical line corresponding to the reception program detected by the reception destination detection unit; and a logical line searched for by the line search unit for data transmitted from any of the transmission programs. And transmission control means for transmitting the data to the reception-side node via a communication device.

According to the first aspect of the present invention, a logical line for transmitting data is specified based on a table describing the correspondence between the name of a receiving program to which data is transmitted and the name of a logical line used for data transmission. Because of the setting, the data transmission order can be guaranteed.

According to the second aspect of the present invention, when the logical line corresponding to the receiving program is not described in the table,
Since data is transmitted using a vacant logical line, the physical line can be used effectively, and the data transfer efficiency can be improved.

According to the third aspect of the present invention, data can be transmitted without disturbing the data transmission order.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a data communication device according to the present invention will be specifically described with reference to the drawings. Hereinafter, an example will be described in which a plurality of transactions are transmitted from a transmitting node to a receiving node via one physical line.

FIG. 1 is a block diagram of an embodiment of a data communication device according to the present invention. The data communication device of FIG.
As in FIG. 4, a transmission node 1 and a reception node 2 connected by one physical line L1 are provided.
1, three logical lines L2 to L4 are set.

As shown in FIG. 4, the transmitting node 1 has a plurality of transmitting programs A-1 and A-2, and transmitting sockets 11 to 13 provided corresponding to the respective logical lines L2 to L4. . In addition, the transmission side node 1 includes a line definition unit (table storage unit) 1 for storing a line definition file 14 described later.
5 and an OLTP control unit 16.

As shown in FIG. 4, the receiving node 2 includes a plurality of receiving programs B-1 and B-2, which are final recipients of transactions from the transmitting programs A-1 and A-2, and each logical program. It has a plurality of receiving sockets 21 to 23 which are provided corresponding to the lines L2 to L4 and receive transactions from the transmitting node 1.

As shown in FIG. 1, the line definition file 14 includes a program name of a receiving side and logical lines L2 to L2 used to transmit a transaction to the receiving side program.
This is a file in which the correspondence with L4 names is described in a table format.

The OLTP control unit 16 further includes a transmission processing unit 1 for processing a transaction transmission request of the transmission-side program.
7 and the logical line L2 used for transmitting the transaction
To L4.

FIG. 2 is a diagram showing a data structure of a transaction transferred from the sending programs A-1 and A-2 to the receiving programs B-1 and B-2. As illustrated, the transaction is divided into a transaction header section 31 and a transaction data section 32. The transaction header section 31 stores information such as a destination host name, a destination program name, and a data length. The transaction data section 32 stores actual data.

FIG. 3 is a flowchart showing the processing operation of the OLTP control unit 16. First, send-side programs A-1 and A-2
It is determined whether or not there has been a transaction transmission request (step S1). If there is no transmission request, step S
1, when there is a transmission request, transactions from the transmission side programs A-1 and A-2 are received (step S2). The processing of steps S1 and S2 is performed by the transmission processing unit 17.

Next, the destination program name included in the transaction header section 31 of the received transaction is detected (step S3). Next, it is determined whether or not the logical lines L2 to L4 corresponding to the detected destination program name are described in the line definition file 14 (step S4).

If there is a description, the described logical line L2
L4 names are assigned to the logical lines L2 to L for transaction transmission.
4 (step S5). On the other hand, if there is no description, the currently available logical lines L2 to L4 are selected as the logical lines L2 to L4 for transaction transmission (step S6). In addition, free logical lines L2 to L
If there is no 4, wait until it becomes empty.

When the processing in step S5 or S6 is completed, the transaction is transferred to the receiving node 2 via the determined logical lines L2 to L4 (step S5).
5). The transferred transaction is socket 2 for receiving
The receiving sockets 21 to 23 determine the destination of the transaction by referring to the destination program name in the transaction header section 31. afterwards,
Transactions are transmitted from the receiving sockets 21 to 23 to the receiving side programs B-1 and B-2 at the final destination.

In the flowchart of FIG. 3, the processing in step S3 is performed by the destination detecting means in steps S4 to S4.
The processing in S6 corresponds to the line search means, and the processing in step S7 corresponds to the transmission control means.

For example, FIG. 1 shows a case where a plurality of programs A-1 and A-2 in the transmitting node 1 transmit a transaction to the same program B-2 in the receiving node 2 before and after. Since the line definition file 14 describes that transmission to the receiving-side program is performed via the logical lines L2 to L4, the previously transmitted transaction always passes through the logical lines L2 to L4. Order is guaranteed.

As described above, in the present embodiment, the line definition file 14 in which the correspondence between the destination program name and the logical lines L2 to L4 to be used is provided, and the logical lines L2 to L4 To determine
The order of the transactions transmitted from the transmitting node 1 to the receiving node 2 can be guaranteed.

In FIG. 1, 3 is assigned to one physical line L1.
Although the example in which the logical lines L2 to L4 are set has been described, the number of logical lines L2 to L4 to be set is not particularly limited. There is no particular limitation on the number of physical lines L1.

The OLTP control section 16 shown in FIG. 1 may be constituted by hardware or software. For example, when the processing of the OLTP control unit 16 shown in FIG. 3 is configured by software, a program for performing these processing may be stored in a recording medium such as a floppy disk or a CD-ROM and read and executed by a computer. Good. The recording medium is not limited to a portable medium such as a magnetic disk or an optical disk, but may be a fixed recording medium such as a hard disk device or a memory.

The program for performing the processing in FIG. 3 may be distributed via a communication line (including wireless communication) such as the Internet. Further, the program for performing the processing of FIG. 3 may be distributed in a state of being encrypted, modulated, or compressed through a wired or wireless line such as the Internet, or stored in a recording medium.

[0032]

As described above in detail, according to the present invention, when data is transmitted from a transmitting node to a receiving node via a logical line set on a physical line, the data is transmitted. Since the logical line to be transmitted is set in advance, the data transmission order can be guaranteed.

For data for which a logical line has not been set in advance, data is transmitted using a vacant logical line as in the prior art, so that a physical line can be used effectively and data transfer efficiency can be improved. .

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of a data communication device according to the present invention.

FIG. 2 is a diagram showing a data structure of a transaction transferred from a transmitting program to a receiving program.

FIG. 3 is a flowchart illustrating a processing operation of an OLTP control unit;

FIG. 4 is a block diagram showing a schematic configuration of a conventional data communication device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sending node 2 Receiving node 11-13 Transmission socket 14 Line definition file 15 Line definition unit 16 OLTP control unit 21-23 Receiving socket L1 Physical line L2, L3, L4 Logical line

Continued on the front page F term (reference) 5B089 GB03 KA05 KA10 KC15 KC22 KC44 5K034 AA01 AA05 CC01 DD01 FF01 HH01 HH02 HH07 JJ11 LL01 MM18

Claims (5)

[Claims] 1. A transmitting node having a plurality of transmitting programs, a receiving node having a plurality of receiving programs, and at least one physical line for data communication connecting the transmitting node and the receiving node. And comprising setting a plurality of logical lines for each of the physical lines,
In a data communication device for transmitting data from the transmitting node to the receiving node via any one of the logical lines, the transmitting node uses a name of a receiving program to which the data is to be transmitted and a data transmission destination. A table storage unit for storing a table describing a correspondence relationship with a logical line name, a reception destination for analyzing data transmitted from any of the transmission programs and detecting a reception program that is a transmission destination of the data Detection means; line search means for searching the table for a logical line corresponding to the reception program detected by the reception destination detection means; and data transmitted from any of the transmission programs being searched by the line search means. Transmission control means for transmitting the data to the receiving node via the specified logical line. Apparatus. 2. The system according to claim 1, wherein said line search means selects one of the vacant logical lines as a search target when the logical line corresponding to the reception program detected by said destination detection means does not exist in said table. The data communication device according to claim 1, wherein 3. The data receiving apparatus according to claim 1, wherein said receiving destination detecting means detects a receiving program to which the data is transmitted in the order in which the data is transmitted from the transmitting program.
Or the data communication device according to 2. 4. A transmission-side node having a plurality of transmission programs and a reception-side node having a plurality of reception programs are connected by at least one physical line for data communication. In the data communication method of setting the logical line and transmitting data from the transmitting node to the receiving node via any logical line, the name of the receiving program to which the data is transmitted, A first procedure for storing a table describing a correspondence relationship with a name of a logical line to be used; and analyzing data transmitted from any of the transmission programs to detect a reception program which is a transmission destination of the data. A second procedure of searching the table for a logical line corresponding to the reception program detected in the second procedure; And a fourth step of transmitting data transmitted from any of the communication programs to the receiving node via the logical line searched in the third procedure. 5. A transmission-side node having a plurality of transmission programs and a reception-side node having a plurality of reception programs are connected by at least one physical line for data communication. A computer-readable recording medium that records a program for transmitting data from the transmitting node to the receiving node via any one of the logical nodes by setting a logical line of And a first procedure for storing a table describing the correspondence between the name of the logical circuit and the name of the logical line used at the time of data transmission; and analyzing data transmitted from any of the transmission programs and transmitting the data. A second procedure for detecting a receiving program that is the destination, and a logical line corresponding to the receiving program detected in the second procedure A third procedure for searching data from any of the transmission programs, and a fourth procedure for transmitting data transmitted from any of the transmission programs to the reception-side node via the logical line searched for in the third procedure. A computer-readable recording medium recording a program comprising: