JP2002244951A - Network system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To flexibly cope with the extension and change of a plurality of related servers in a data transmission and receiving between the servers of a network system formed of a plurality of related servers. SOLUTION: This network system comprises a plurality of related servers 21 related to each other and a transfer server 10 installed to transmit and receive the data file formed of at least a data file related to contents and including the transmission information on at least the servers on the transmission side between a plurality of related servers 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer server provided for transmitting and receiving predetermined data between a plurality of related servers, and a method for transmitting and receiving data between servers using the transfer server. And a network system using the transfer server.

[0002]

2. Description of the Related Art A plurality of servers related to each other (hereinafter referred to as "servers").
It is widely used to transmit and receive data between these specific servers in order to provide a “related server”) and process the generated data on one server on another server. As for the transmission and reception of this data, for example, when operating a core information processing system that performs processes such as production, sales, inventory, purchasing, logistics, accounting, human resources, etc., an affiliated company that actually performs operations related to each process Providing a related server in a related department or the like, and transmitting data created by each related server to the core information processing system, and transmitting data created by the core information processing system to each related server.

In this case, this data transmission / reception
Normally, each related server and the core information processing system are individually connected by a dedicated line or the like, and the connection is performed through the dedicated line. In this way, by transmitting and receiving necessary information between the system server that holds the data and the system server that needs the data, the data server can be made more efficient and the data can be effectively used. I have.

[0004]

In the above-described network system, there is no problem if only data transmission and reception between two related servers are performed. When a related server is added to a network system including related servers, since the related server and the core information processing system are directly connected to each other, data transmission / reception to and from each related server and the core information processing system server is performed. You need to build a new system and make sure that it works properly.

[0005] In addition, when the specification is changed in the related server system and the core information processing system, for example, the operation system (OS) is changed, it is confirmed that the data transmission / reception can be normally performed on the new OS. It is necessary to confirm that the system and the core information processing system operate normally. As described above, when it is necessary to increase the number of related servers and the core information processing system servers, change specifications, and the like, it is difficult to flexibly respond to these.

[0006] The related servers and the core information processing system servers are connected one-to-one, and are aware of the operation status such as whether or not the partner server is constantly operating, and take data in synchronization with each other. Need to send and receive. The present invention has been made in view of the above-described circumstances, and has been described in connection with data transmission and reception between servers in a network system including a plurality of related servers (hereinafter, unless otherwise noted, includes a main information processing system server). ,
To provide a data transmission / reception method and a network system capable of flexibly responding to the addition or change of related servers, and to provide a transfer server necessary for realizing such a method or system. It is an object.

[0007]

A transfer server according to the present invention comprises at least a data file relating to contents between a plurality of related servers, and at least a data file including transmission information relating to a destination server. A transfer server provided for transmitting and receiving data, receiving means for capturing data files received from the plurality of related servers, storage means for storing the data files captured by the receiving means, and the storage means Transmitting means for transmitting the data file stored in the data file to the related server specified by the transmission information included in the data file, and a pre-registered data file transmitted and received by the plurality of related servers. A management information storage unit for storing management information including transmission information; and The data file received from the means is extracted and sent to the storage means, and at the time of transmission of the data file, a data file containing transmission information registered as management information in the management information storage means is taken out from the storage means. , Extracting means for sending to the transmitting means.

[0008] According to the transfer server, the data file created by the related server is stored in a file transfer protocol (ftp: file transfer protocol) of the related server.
The data is sent according to an appropriate transmission / reception protocol such as l) and received by the receiving means. The data file fetched by the receiving means is extracted by the extracting means, sent to the storing means and stored. When transmitting the data file stored in the storage means to the relevant server, the extraction means:
In order to transmit and receive the data file registered in advance in the management information storage means, a data file containing transmission information listed in the stored management information, extracted from the storage means,
Send to sending means. The transmission means transmits the data file to the associated server specified by the transmission information included in each data file according to a transmission / reception program of the transfer server.

By doing so, the data processing environment, for example, the operating system (O
Regardless of the difference in S), data files can be transmitted and received between the related servers via the transfer server. Also,
In order to transmit and receive data files between servers via the transfer server, for example, add a related server, change a system such as an operation change in the related server, change the content of the management information, for example, specify the related server When this identification data is used, by adding or changing this identification data, it can be performed without affecting other related servers, and the burden on each server for this system change is reduced. can do.

[0010] Further, without directly transmitting and receiving data files between the related servers, data files between the related servers are always transmitted and received via the transfer server, and the related servers do not directly access each other. ) Can be kept. Further, the receiving means accesses a predetermined file transmission unit of a related server that does not have a predetermined transfer program for transmitting and receiving a data file among the plurality of related servers, and is created by the related server and temporarily It is preferable to retrieve the data file stored in the file transmission unit from the file transmission unit.

As described above, by causing the receiving means of the transfer server to access the file transmission unit of the related server to perform the receiving operation, even if there is a related server having no transmission / reception program, the related server is newly added. It is possible to transmit / receive a data file from this related server to another related server via the transfer server without placing a burden on the related server such as introducing a transmission / reception program.

The management information storage means stores at least identification data for specifying each related server, and at least a list of master data of the transmission information indicating the related server of the transmission destination by the identification data. Is preferably performed. In such a configuration, first, the identification data of the related server connected to the transfer server is determined in advance,
The related server of the transmission destination is represented using the identification data, and at least the identification data is used as transmission information. This transmission information is registered as management information (master data) and stored in the management information storage means.

By doing so, it becomes possible to specify, for example, a data file having unregistered transmission information or a data file having transmission information without specifying a destination server. For such data files, by performing processing such as sending a file indicating a transfer error, such as a transfer error file, to the transmission source related server, while individually dealing with data files that have no place to go, Thus, the load on the processing of the transfer server can be reduced. Further, it becomes easy to construct an automatic data transfer system.

According to the method of transmitting / receiving a data file between servers according to the present invention, a transfer server is provided between a plurality of related servers, and at least transmission data relating to a destination server is provided. A data file transmission / reception method for transmitting / receiving a data file including a plurality of related servers between the plurality of related servers via the transfer server, wherein the transfer server receives data files from the plurality of related servers. And a storing step of storing each data file received in the receiving step in a predetermined storing means provided in the transfer server; and for transmitting and receiving the data file from the storing means to the plurality of related servers. An extraction step of extracting a data file including transmission information included in management information registered in advance, The issued data file, is characterized by a transmitting step of transmitting to the associated server specified by the transmission information included in the data file.

According to the data file transmission / reception method,
In the receiving step, a data file created by the related server and transmitted according to an appropriate transmission / reception protocol such as a file transfer protocol (ftp) of the related server is received. In the storage stage, the captured data file is stored. In the extraction step, a data file including transmission information listed in management information registered in advance to transmit and receive the data file is extracted. In the transmitting step, the data file is transmitted to the related server specified by the transmission information included in each data file according to the transmission / reception program of the transfer server.

In this manner, the data processing environment, for example, the operating system (O
Regardless of the difference in S), data files can be transmitted and received between the related servers via the transfer server. Also,
In order to transmit and receive data files between servers via the transfer server, for example, add a related server, change a system such as an operation change in the related server, change the content of the management information, for example, specify the related server When this identification data is used, by adding or changing this identification data, it can be performed without affecting other related servers, and the burden on each server for this system change is reduced. can do.

In addition, since data files are not transmitted and received directly between related servers, data files are always transmitted and received between related servers via the transfer server and the related servers do not directly access each other. ) Can be kept. An access step of accessing a predetermined file transmission unit of a related server that does not have a predetermined transfer program for transmitting and receiving a data file among the plurality of related servers; It is preferable that a step of taking out the obtained data file from the file transmission unit is provided, and the receiving step receive the data file taken out in the step of taking out.

As described above, by providing the access stage and the take-out stage to enable access to the file transmission unit of the related server to perform the receiving operation, there is a related server having no transmission / reception program. Also, it is possible to transmit / receive a data file from this related server to another related server via the transfer server without putting a burden on the related server, such as introducing a new transmission / reception program into the related server.

It is preferable that the management information includes at least identification data for specifying each related server and a list of master data of the transmission information in which at least a destination related server is represented by the identification data. . In such a configuration, first, the identification data of the related server connected to the transfer server is determined in advance, the related server of the transmission destination is represented using the identification data, and at least the identification data is used as transmission information. This transmission information is registered as management information (master data) and is set as management information.

By doing so, it is possible to specify, for example, a data file having unregistered transmission information and a data file having transmission information without specifying a destination server. For such data files, by performing processing such as sending a file indicating a transfer error, such as a transfer error file, to the transmission source related server, while individually dealing with data files that have no place to go, Thus, the load on the processing of the transfer server can be reduced. Further, it becomes easy to construct an automatic data transfer system.

In the related server, at least a control file indicating the date and time when each data file was created is created in advance corresponding to each data file, and in the receiving step, a corresponding control file exists. In the storing step, when a control file having the same file name already exists in the storing unit, a data file corresponding to the control file is preferably not newly stored in the storing step.

In the extracting step, a control file indicating the extracted date and time is created corresponding to the extracted data file, and in the transmitting step, a control file specified by transmission information included in the data file is transmitted to a related server. If a control file having the same file name already exists, it is preferable not to transmit the data file.

As described above, the control file for comprehending the transmission / reception state of the data file is created, and the information on the file creation date and time normally written in a part of the data file is managed by another file, so that the reception It is easy to use separate control files at each stage, such as using a control file created on the related server and using a newly created control file on the transfer server when sending. It becomes easy to grasp the state.

In particular, when a data file is transmitted by the transfer server, a new control file is simply created without performing complicated data processing such as reading the data file and rewriting information relating to the file creation date and time. Then, just handle it with the data file. That is, the transmission / reception state of the data file can be grasped using the new control file.

Thus, it is possible to effectively prevent a double registration error in the accumulation step when double transmission is performed, and prevent double transmission to each related server in the transmission step. The network system according to the present invention, a plurality of related servers related to each other, between the plurality of related servers, at least a data file related to the contents, including at least a data file containing transmission information about the destination server, A transfer server provided for transmitting and receiving, the transfer server comprising: a receiving unit for receiving a data file received from the plurality of associated servers; and a storage unit for storing the data file received by the receiving unit. Transmitting means for transmitting the data file stored in the storage means to the related server specified by the transmission information included in the data file; and transmitting and receiving the data file in each of the plurality of related servers. A management information storage unit for storing management information including transmission information registered in advance, and data At the time of receiving the file, the data file received from the receiving means is extracted and sent to the storage means, and at the time of transmission of the data file, the data file containing the transmission information registered as the management information in the management information storage means is read. , Extracting means for extracting from the accumulating means and sending to the transmitting means.

According to the network system, a predetermined data file is created in the related server, and the data file is transferred according to an appropriate transmission / reception protocol such as a file transfer protocol (ftp) of the related server. It is sent to the server and received by the receiving means of the transfer server. The data file fetched by the receiving means is extracted by the extracting means, sent to the storing means and stored. When transmitting the data file stored in the storage unit to the relevant server, the extraction unit registers the management information in advance in the management information storage unit in order to transmit and receive the data file. A data file containing information is extracted from the storage unit and sent to the transmission unit. The transmission means transmits the data file to the associated server specified by the transmission information included in each data file according to a transmission / reception program of the transfer server.

By doing so, the data processing environment, for example, the operating system (O
Regardless of the difference in S), data files can be transmitted and received between the related servers via the transfer server. Also,
In order to transmit and receive data files between servers via the transfer server, for example, add a related server, change a system such as an operation change in the related server, change the content of the management information, for example, specify the related server When this identification data is used, by adding or changing this identification data, it can be performed without affecting other related servers, and the burden on each server for this system change is reduced. can do.

Further, data files are not transmitted and received directly between the related servers, but data files between the related servers are always transmitted and received via the transfer server, and the related servers do not directly access each other. ) Can be kept. Further, the receiving means accesses a predetermined file transmission unit of a related server that does not have a predetermined transfer program for transmitting and receiving a data file among the plurality of related servers, and is created by the related server and temporarily It is preferable to retrieve the data file stored in the file transmission unit from the file transmission unit.

As described above, by causing the receiving means of the transfer server to access the file transmission unit of the related server and perform the receiving operation, even if there is a related server having no transmission / reception program, the related server is newly added. It is possible to transmit / receive a data file from this related server to another related server via the transfer server without placing a burden on the related server such as introducing a transmission / reception program.

The management information storage means stores at least identification data for specifying each related server and at least a list of master data of the transmission information indicating the related server of the transmission destination by the identification data. Is preferably performed. In such a configuration, first, the identification data of the related server connected to the transfer server is determined in advance,
The related server of the transmission destination is represented using the identification data, and at least the identification data is used as transmission information. This transmission information is registered as management information (master data) and stored in the management information storage means.

By doing so, it is possible to specify, for example, a data file having unregistered transmission information or a data file having transmission information without specifying a destination server. For such data files, by performing processing such as sending a file indicating a transfer error, such as a transfer error file, to the transmission source related server, while individually dealing with data files that have no place to go, Thus, the load on the processing of the transfer server can be reduced. Further, it becomes easy to construct an automatic data transfer system.

[0032] In addition to the related server, a backbone system server for performing predetermined backbone processing is provided, and a data file transmitted and received between the backbone system server and the related server is stored. It is preferable to provide a main processing database. It is preferable that the core processing database is provided in the transfer server.

As described above, the core processing database is
For example, a system server that performs core information processing by storing data files transmitted and received between a related server and a system server that performs core information processing in the transfer server by storing the data files in the database for core processing. In addition, necessary data can be transmitted / received without being aware of transmission / reception to / from the related server.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a transfer server according to the present invention,
A method for transmitting and receiving data files between servers and a network system will be described in detail with reference to the drawings. In the present invention, the data file exchanged between the servers includes at least the contents related to the contents including text data and the like, and includes at least transmission information on the destination server.

For example, assume that the file name designating this data file is ab999. At this time, a is identification data of the transmission source server, b is identification data of the transmission destination server, and 999 is a serial number in each server. This file name becomes transmission information as it is and is added to the data file. A data file defined by such a file name is usually text data, and includes data itself processed by another server.

In the method for transmitting and receiving a data file between servers according to the present invention, a transfer server is provided between a plurality of related servers related to each other, and a data file including at least the text data and the transmission information is stored in the plurality of related servers. This is a data file transmission / reception method between servers that transmits and receives between related servers via the transfer server. As shown in FIG. 1, step S3, which is a receiving step in which the transfer server receives data files from the plurality of related servers,
Step S4, which is a storage step of storing each data file received in step S3 in a predetermined storage unit provided in the transfer server, and transmission and reception of data files from the storage unit to the plurality of related servers. Step S5, which is an extraction step of extracting a data file including transmission information included in management information registered in advance in the server, and transmitting the extracted data file to an associated server specified by the transmission information included in the data file And step S6, which is a transmission stage.

In step S1, predetermined information on each related server is registered in the transfer server in advance, and the above-described identification data is defined. Further, master data of transmission information is created and registered using the identification data. In the transfer server, the registered contents are stored and managed by an appropriate storage unit. In this way, by storing and managing the information of the related server connected to the transfer server in the transfer server, when the system is changed, for example, when the related server is added, the identification data of the new related server is established. Need only be added to the management information. Therefore, it is possible to flexibly respond to a change such as the addition of a related server.

Here, the identification data is used to identify the source server or the destination server,
This makes it easy to include information for specifying the source and destination servers in the data. Also, the master data of the transmission information is that, when a related server performing predetermined data processing requests a predetermined data file, transmission information having identification data for specifying the relevant server as a destination server is registered in advance. Data, or in particular, in data processing such as core information processing, if the related server that creates the information necessary for processing is known in advance, having identification data identifying the related server as the transmission source server, and This refers to data registered in advance for transmission information having identification data that specifies a system server that performs core information processing as a destination server.

Further, in addition to the identification data, a user name and a password in each related server may be registered. In this way, by requesting a user name and a password each time each related server accesses the transfer server, if there is unauthorized access from each related server, this access can be rejected. .

In step S2, a data file constituting predetermined data is created in each related server. Here, the related server is a server that handles data related to each other, such as a server of a department engaged in core information processing, a server of a department engaged in production, a server of a department engaged in sales, and a server located in an affiliated company.

In step S3, the data file created by the related server is stored in a predetermined reception area (hereinafter, referred to as "file transfer protocol") of the transfer server according to an appropriate transmission / reception protocol such as a file transfer protocol (ftp) of the related server. Receiving unit), and proceeds to step S4. In step S4, the data file sent to the receiving unit is stored in a storage unit provided in the transfer server.

When transmitting the data files stored in step S4 to the associated server specified by the transmission information of each data file, the process proceeds to step S5,
The data file stored in the storage unit is extracted and sent to a predetermined transmission area (hereinafter, also referred to as a “transmission unit”), and the process proceeds to step S6. In step S6, according to the transmission / reception program of the transfer server, Each data file is transmitted to the transfer server, and the transmission / reception operation ends.

In the related server, it is preferable that a control file indicating at least the date and time when each data file was created is created in advance corresponding to each data file. The date and time when the data file was created include the date and time when the data file was actually created in each related server and the date and time when the data file was extracted from the storage unit for transmission in the transfer server.

At the time of reception, a control file indicating the date and time when the data file was actually created by the related server is used, and at the time of transmission, the transfer server uses a control file indicating the date and time when the data file was extracted from the storage means for transmission. This makes it possible to grasp the state of transmission / reception of each data file via the transfer server.

That is, when the control file of the same name is searched in advance by the storage means of the transfer server which receives the data file in the transmission / reception operation or the file receiving unit of the related server, and the control file of the same name exists in the receiving destination. Then, by stopping the transmission of the data file corresponding to the control file, the double registration error is prevented in step S4 when the double transmission is performed, and the double transmission to each related server is performed in step S6. Can be effectively prevented.

To prevent double registration error in step S4, the data file is received by the receiving unit of the transfer server, and the data file is stored in the storage unit provided in the transfer server. In step S5, the data file is stored in the storage unit. After the extracted data file is extracted and sent to the transmission area, the control file of the storage unit and the data file are deleted, thereby realizing the above-mentioned operation.

Similarly, the prevention of double transmission in step S6 is achieved by transmitting the data file from the transfer server to the file receiving unit provided in the related server, which is the receiving destination, and taking in the data file by the related server. This can be realized by deleting the control file and the data file of the file receiving unit at the related server. The information contained in the control file is information that is usually written in, for example, a header portion of the data file.To rewrite this information, the data file is read to rewrite the information, and the data file is overwritten. Needs to be updated. If the transfer server performs this operation for each data file, an enormous amount of data processing must be performed by the transfer server, which places a load on the transfer server.

Therefore, information relating to the file creation date and time normally written in a part of the data file is created by creating a file separate from the data file and managed by this file. It is easy to use a separate control file at each stage, such as using a file and using a control file newly created by the transfer server at the time of transmission, so it is easy to grasp the transmission / reception state of the data file .

Further, the control file for transmission is
For example, the control file is represented by a predetermined extension snd, and the received control file is represented by a predetermined extension rcv, for example.
Therefore, the transmission control file corresponding to the data file whose file name is ab999 is a
b999. snd, the received control file is ab999. It is represented by rcv.

When a file is transmitted / received using such a control file, as shown in FIG. 2, in step S200, the data file and the transmission control are transmitted from the related server to the receiving unit of the transfer server. The files are sent, the transfer server receives these files, and the process proceeds to step S210. Step S210
Then, on the transfer server side, the control file corresponding to the data file sent to the receiving unit is checked at regular time intervals, and the process proceeds to step S220. In step S220,
It is determined whether the control file exists in the receiving unit. If the determination result is NO, that is, if the control file does not exist, that is, if no data file has been received, the process returns to step S200 to receive the data file. If the determination result is YES, that is, if the control file exists, step S230
Proceed to.

In step S230, it is determined whether a control file having the same file name exists in the storage unit (storage unit). If the determination result is YES, that is, if a control file having the same file name exists, that is, if the same data file exists, an error is notified to the transfer server administrator as necessary (step S240), and step S200 is performed. Return to If the determination result is NO, that is, if there is no control file having the same file name, step S250
Then, the control file for transmission is rewritten to the received control file, and the process proceeds to step S260.

In step S260, the received control file and the corresponding data file are moved to the storage unit, that is, copies of these files are sent to the storage unit, and these files are deleted from the reception unit. The receiving operation ends. FIG. 2 shows that the process returns to step S200, and the transfer server returns to the reception standby state.

By doing so, the control file having the same file name as the control file already stored in the storage unit of the transfer server and the data file corresponding thereto are stored in the storage unit of the transfer server. It is not taken in heavily. Further, the file transmission from the related server to the receiving unit of the transfer server in step S200 is performed as follows.
Normally, the transfer is performed according to the file transmission / reception program of the related server. If the related server does not have the file transmission / reception program, as illustrated in FIG. 3, the transfer is performed according to the file transmission / reception program of the transfer server.

In FIG. 3, in step S311, master data of transmission information of a file scheduled to be transmitted from a related server having no transmission / reception program is extracted from the management information and read to create a list.
In this case, whether the advance which related server does not have a reception program, for example keep be included in the management information preferred.

In step S312, step S311
According to the list of the files to be received read in step 3, the connection is sequentially made to the related server having no transmission / reception program, and the process proceeds to step S313 to determine whether or not there are no more files to be received. This determination is for determining whether all the scheduled data files have been received. If the result of this determination is YES, that is, if there is no further data file scheduled to be received from a related server that does not have a transmission / reception program, the receiving operation ends. If the determination result is NO, that is, if there is still a data file to be received, step S31
Proceed to 4.

In step S314, step S312
Access the file transmission unit of the related server specified by the transmission information of the data file specified by the file name set in the step. In this file transmission unit, a data file to be transmitted to the transfer server on the related server side is stored in advance. In step S315, it is determined whether or not the data file and the corresponding transmission control file exist in the file transmission unit of the accessed related server.

If the determination result is NO, that is, if at least one of the files does not exist, if necessary,
An error is notified to the administrator of the related server (step S316), and the process returns to step S312. If the determination result is YES, that is, if both the data file and the transmission control file corresponding to the data file exist, the process proceeds to step S317.

In step S317, the data file is fetched and received by the receiving unit of the transfer server. Subsequently, in step S318, the control file for transmission corresponding to this data file is fetched and received by the receiving unit.
That is, copies of these files are received by the receiving unit. In step S319, the file transmitting unit of the related server is accessed in accordance with the transmission / reception program of the transfer server, and the data file and control file in which the copies are captured in steps 317 and S318 Is deleted, and the process returns to step S312. This deletion may be a logical deletion or a physical deletion.

In steps S311 to S314, the file names of the data files to be received are set.
A method of accessing the related server by designating the related server to be accessed using the transmission information of the data file is shown in step S314. Instead, a related server having no file transmission / reception program is set. Alternatively, a program may be configured to sequentially access the set related servers, and the related servers may be accessed.

When extraction (step S5) and transmission (step S6) are performed using the control file, it is preferable to perform the procedure shown in FIG. In FIG. 4, steps S411 to S418 correspond to FIG.
Steps S421 to S427 correspond to step S6 in FIG. In FIG. 4, in step S411, a list of master data of transmission information included in the management information is read, and the process proceeds to step S412.

In step S412, step S411
Data files to be transmitted are sequentially set in accordance with the list read in step S413, and the flow advances to step S413 to determine whether a data file to be transmitted is on the list. This determination is for determining whether all the data files scheduled to be transmitted have been extracted from the storage unit. If the result of this determination is NO, that is, if there is no data file scheduled for further transmission in the list, the flow proceeds to step 421.

If the result of this determination is YES, that is, if data files to be further extracted remain in the list, the flow advances to step S414. In step S414,
Set the file according to the list, access the storage unit,
Proceeding to step S415, it is determined in step S415 whether the data file set in step S412 exists.

If the determination result is NO, that is, if the set data file does not exist, step S412
Return to If the determination result is YES, that is, if the data file exists in the storage unit, step S416
Proceed to. In step S416, a data file existing in the storage unit is extracted, a copy is sent to the transmission unit of the transfer server, and the process proceeds to step S417.

In step S417, step S416
Create a control file corresponding to the data file extracted in step 4 as a control file for transmission,
It adds to the said transmission part, and progresses to step S418. In step S418, the data file extracted in step S416 is deleted from the storage unit, and the process returns to step S412.

According to steps S412 to S418, the data file having the transmission information listed in the list including the master data of the transmission information stored as the management information is extracted and sent to the transmission unit, and the data file is transmitted to the transmission unit. A transmission control file corresponding to the file is also created. Subsequently, step S421
Then, the control file for transmission stored in the transmission unit is read, and the process proceeds to step S422. In step S422, it is determined whether the control file has been exhausted.

When the result of this determination is YES, that is, when it is determined that there is no control file and all data files have been transmitted to the relevant servers, the transmission operation ends. Note that FIG. 4 shows that the process returns to step S411, and the transfer server returns to the transmission standby state. If the determination result is NO, that is, if there is a transmission control file corresponding to the untransmitted data file in the transmission unit, the process proceeds to step S423.

In step S423, a set of the data file remaining in the transmission unit and the corresponding control file is taken out, and a predetermined reception area (hereinafter, referred to as a reception area) of the related server specified by the transmission information of this data file is obtained.
Then, the process proceeds to step S424. In step S424, it is determined whether a control file having the same file name exists in the file receiving unit.

If the determination result is YES, that is, a control file having the same file name exists in the file receiving unit, that is, the same data file has already been sent to the related server, and the related server has not taken in the data file. In this case, a transfer error file indicating a transfer error is transmitted to the file receiving unit as needed (step S425), and the process returns to step S421.

The transfer error file includes:
For example, a file specified using the file name of the corresponding data file other than the identifier err. Specifically, the file name of the transfer error file for the data file specified by ab999 is ab9
99. err. Since the transfer error file only needs to convey only the fact of an error, the file does not need text data and may be an empty file.

If the decision result in the step S424 is NO, that is, if the corresponding control file is not in the file transmitting section of the related server, the flow advances to a step S426 to copy the data file and the control file to the file receiving section of the related server. And the process proceeds to step S427, where both the data file and the control file are deleted from the transmission unit of the transfer server, and the process returns to step S421.

This deletion may be performed logically or physically. If you delete logically and store it physically for a certain period of time, if the related server to which the data file was sent requests a data file again, the data file is You can revive and send the data file.

According to steps S421 to S427, the data file sent to the transmission unit of the transfer server and the corresponding control file for transmission are transmitted according to the transmission / reception program of the transfer server with the transmission information of the data file. Sent to the specified associated server. If the same data file has already been sent to the related server, the data file is not sent to the related server, and a transfer error is notified if necessary.

In this way, the control file having the same file name as the control file already stored in the file receiving unit of the related server and the data file corresponding thereto are not duplicated.
By doing as described above, data transmission / reception between the related servers via the transfer server becomes possible irrespective of the data processing environment, for example, the difference of the operating system (OS) between the related servers.

Further, since the data file transmission and reception between the servers is performed via the transfer server, for example, a system change such as an addition of a related server or an operation change in the related server is performed by changing the content of the management information. When the identification data for identifying the server is used, by adding or changing the identification data, it can be performed without affecting other related servers at all, and each server can respond to the system change. Can be reduced.

Since the data files are not transmitted and received directly between the related servers, but the data files are always transmitted and received between the related servers via the transfer server, and the related servers do not directly access each other. ) Can be kept. As shown in FIG. 5, the network system according to the present invention includes at least a plurality of related servers 21 related to each other, and at least a data file related to the contents between the plurality of related servers 21, and relates to at least a destination server. A data file containing the transmission information
And a transfer server 10 provided for transmission and reception.

The transfer server 10 is a transfer server according to the present invention. The transfer server 10 receives data files received from a plurality of related servers 21, and stores the data files received by the receiver 14. A storage unit 20 as means, a transmission unit 16 for transmitting a data file stored in the storage unit 20 to an associated server specified by transmission information included in the data file, In order to transmit and receive a file, a management information storage unit 18 that stores management information including transmission information registered in advance, and a data file received from the reception unit 14 when a data file is received, is extracted and stored. Data file including the transmission information registered as management information in the management information storage unit 18 when the data file is transmitted. Le, removed from the storage unit 20,
It has a CPU 12 which is an extracting means for sending to the transmitting unit 16.

In the operation of each configuration shown in FIG. 5 described below, if any of the steps shown in FIGS. 1 to 4 is applicable, the step number is appropriately indicated. In the transfer server 10, the management information storage unit 18 stores the master data list of the transmission information as described above (step S1). The data file specified by the transmission information included in this list is the data file transmitted and received by this network system. It is preferable to accumulate information on the related server to be connected, for example, whether or not the server has a file transmission / reception program, if necessary.

The receiving section 14 receives a data file transmitted from the related server 21 via the predetermined network 30 in a predetermined receiving area (step S3, step S20).
0). In addition, the receiving unit 14 is preferably a part that operates according to a file transmission / reception protocol such as ftp based on an instruction from the CPU 12. Specifically, the reception unit 14 transmits and receives a data file among a plurality of related servers 21. Access to a predetermined file transmitting unit 22 of a related server that does not have a predetermined transfer program (step S314), and retrieves a temporarily created data file created by the relevant server from the file transmitting unit (step S315). 318). Further, the data file and the control file are deleted as needed (step S319).

As described above, the receiving unit 14 of the transfer server 10
Allows the user to access the file transmission unit 22 of the related server 21 to perform the receiving operation, so that even if there is a related server that does not have a sending / receiving program, a new sending / receiving program is introduced to this related server. For example, a data file can be transmitted / received from this related server to another related server 21 via the transfer server 10 without putting a burden on the related server.

At the time of reception, the CPU 12 accesses the receiving unit 14 to check the control file at regular intervals (step S210), and determines whether there is a control file (step S220). If the control file is in the receiving unit 14, it is determined whether or not a control file having the same file name is in the storage unit 20 (step S230). If not, the control file is rewritten to a received control file. (Step S250), the rewritten received control file and the corresponding data file are moved to the storage unit 20 (Step S260), and the storage of the data file and the like in the storage unit 20 is completed as described above (Step S260). S4).

In particular, when receiving a data file created by a related server having no transmission / reception program,
A list of data files to be received is created and read (step S311), and in accordance with this list, a connection is sequentially made to a related server having no transmission / reception program.
Import to the receiving unit 14 (steps S314 to S31)
9). Next, it is determined whether there are no more files to be received in the list (step S313). Here, when the data file to be received is on the list, the receiving unit 14 is instructed to access the file transmitting unit 22 of the related server.

At the time of transmission, a list of data files to be transmitted is read from the management information storage unit 18, and data files are extracted from the storage unit 20 according to the list, and a control file corresponding to the extracted data files is created. (Step S5, Steps S411 to S418). Further, the extracted data file or the like is sent to the transmission unit 16 (step S421).

The transmitting unit 16 transmits the data file for transmission transmitted from the CPU 12 and the corresponding control file to the file receiving unit 23 of the related server 21 specified by the transmission information of the data file (step). S6, steps S423 to S427). The storage unit 20 is a unit that stores the data file received by the receiving unit 14 (step S3) and the control file rewritten by the CPU 12 (step S4).

The related server 21 includes a server of a department engaged in core processing, a server of a department engaged in production, a server of a department engaged in sales, a server located in an affiliated company, and the like.
A server that handles data related to each other. Further, each related server includes a file transmission unit 22 for temporarily storing a data file or the like when transmitting a data file or the like to the transfer server 10, and a receiving unit for receiving a data file or the like from the transfer server 10. File receiving unit 2
And 3.

The network 30 is a communication network for connecting a plurality of servers such as a local area network (LAN), a wide area network (WAN), and the Internet. According to the network system, a predetermined data file is created in the related server 21, and the data file is transferred to the transfer server according to an appropriate transmission / reception protocol such as a file transfer protocol (ftp) of the related server 21. 10 and received by the receiving unit 14 of the transfer server 10. The data file captured by the receiving unit 14 is extracted by the CPU 12, sent to the storage unit 20, and accumulated. Storage unit 2
When the data file stored in the management information storage unit 18 is transmitted to the relevant server 21 when transmitting the data file stored in the management information storage unit 18, the CPU 12 transmits the data file stored in the management information storage unit 18 in advance. A data file containing information is extracted from the storage unit 20 and sent to the transmission unit 16. The transmission unit 16 transmits the data file to the associated server 21 specified by the transmission information included in each data file according to a transmission / reception program of the transfer server 10.

In this way, regardless of the data processing environment between the related servers 21, for example, the difference in the operating system (OS), the related servers 21
Data file transmission / reception via the transfer server 10 becomes possible. Further, since the transmission and reception of the data file between the servers is performed via the transfer server, for example, the related
A system change such as an operation change in the related server 21 is made by changing the content of the management information. For example, when identification data for specifying the related server 21 is used, the identification data is added or changed. This can be performed without affecting the other related servers 21 at all, and the burden on each server for this system change can be reduced.

Further, without directly transmitting and receiving data files between the related servers 21, the data files between the related servers 21 are always transmitted and received via the transfer server 10 and the related servers 21 do not directly access each other. Sex (safety) can be maintained. As shown in FIG. 6, a backbone system server 41 that performs a predetermined backbone process is separately provided in addition to the related server 21, and data transmitted and received between the backbone system server 41 and the related server 21 is further provided. It is preferable that a storage unit 40 that stores files and functions as a backbone processing database is provided in the transfer server 10, for example.

As described above, the core processing database 41
Is provided, and a data file transmitted and received between the related server 21 and the system server 41 that performs the core information processing is
By storing the data in the storage unit 40, the system server 41 that performs basic information processing can transmit and receive necessary data without being aware of transmission and reception with the related server 21.

Here, the components having the same reference numerals as those shown in FIG. 5 perform the same operations as those described above, and therefore the description thereof will be omitted. The storage unit 40 includes the storage unit 20
Similarly to (1), this is a part for temporarily storing the data file and the like received from the transmission destination related server 21 (step S3) (step S4),
It also operates as a database for temporarily storing data sent from the server to the core system server 41.

Further, the core system server 41 is an integrated business system (ERP: enterprise resource planning).
It is a server that integrates and manages key information processing systems such as production, sales, inventory, distribution, accounting, and personnel. In this basic information processing, various data such as production and sales created by each related server 21 is used. Further, the data processed by the core system server 41 is transmitted to each related server 21 and used for data processing of various systems such as related companies and related departments.

The backbone system server 41 is the related server 2
Since the data can be taken in without being aware of transmission / reception to / from the device 1, it is preferable to temporarily store the transferred data in the storage unit 40. Conversely, when data is sent from the core system server 41 to the related server 21,
Since transmission data can be registered without being aware of transmission / reception with the related server 21, data to be transferred is temporarily stored in the storage unit 40.
It is preferable to store it in

Here, an example in which one storage unit 40 is used both as a storage unit for temporarily storing data transmitted and received between the related servers 21 and as a database for the core system server 41 will be described. However, two storage units may be provided separately from each other. It is understood that a configuration in which the above aspect is appropriately changed without departing from the purpose of the present invention also belongs to the scope of the present invention.

[0093]

According to the present invention, in data transmission / reception between servers in a network system including a plurality of related servers, it is possible to flexibly cope with the addition or change of related servers.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a method for transmitting and receiving data between servers according to the present invention.

FIG. 2 is a flowchart for explaining an operation in data reception in the data transmission / reception method.

FIG. 3 is a flowchart for explaining another operation in data reception in the data transmission / reception method.

FIG. 4 is a flowchart for explaining an operation in data transmission in the data transmission / reception method.

FIG. 5 is a schematic diagram showing an embodiment of a network system including a transfer server according to the present invention.

FIG. 6 is a schematic diagram showing another aspect of the network system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Transfer server 12 CPU 14 Reception part 16 Transmission part 18 Management information storage part 20 Storage part 21 Related server 22 File transmission part 23 File reception part 30 Network 40 Storage part 41 Core system server

Claims (13)

[Claims] 1. A transfer server provided between a plurality of related servers that are related to each other and configured to transmit and receive a data file including at least transmission information relating to a destination server, the data file including at least contents. Receiving means for capturing data files received from the plurality of related servers; storing means for storing the data files captured by the receiving means; and storing the data files stored by the storing means in the data file. Transmitting means for transmitting to the related server specified by the transmission information included in the management information, and management for accumulating management information including transmission information registered in advance in order to transmit and receive a data file between the plurality of related servers. Information storage means, and when receiving the data file, extract the data file received from the receiving means Extracting means for extracting a data file containing transmission information registered as management information in the management information storage means from the storage means, and sending the data file to the transmission means when transmitting the data file to the storage means. A transfer server comprising: 2. The method according to claim 1, wherein the receiving unit accesses a predetermined file transmitting unit of the relevant server that does not have a predetermined transfer program for transmitting and receiving a data file among the plurality of related servers, and is created by the relevant server. 2. The transfer server according to claim 1, wherein the temporarily stored data file is taken out from the file transmission unit. 3. The management information storage means stores at least identification data for specifying each related server, and at least a list of master data of the transmission information indicating a related server of a transmission destination by the identification data. The transfer server according to claim 1, wherein the transfer is performed. 4. A transfer server is provided between a plurality of related servers related to each other, and a data file including at least a data file related to contents and including at least transmission information on a destination server is transferred between the plurality of related servers. A data file transmission / reception method between servers transmitting and receiving via the transfer server, wherein a reception step in which the transfer server receives data files from the plurality of related servers; and each data file received in the reception step, An accumulating step of accumulating the data in a predetermined accumulating means provided in the transfer server; and transmitting information included in management information registered in advance from the accumulating means for transmitting and receiving a data file with the plurality of related servers. An extraction step of extracting the data file, and including the extracted data file in the data file. Data file transmission and reception method between a server and a sending step of transmitting to the associated server specified by the transmission information that. 5. An access step of accessing a predetermined file transmission unit of a related server that does not have a predetermined transfer program for transmitting and receiving a data file among the plurality of related servers; 5. The server according to claim 4, further comprising: an extraction step of extracting a data file that has been temporarily stored from the file transmission unit, wherein the receiving step receives the data file extracted in the extraction step. How to send and receive data files between 6. The management information includes at least identification data for specifying each related server and a list of master data of the transmission information indicating at least a destination related server by the identification data. The data file transmission / reception method between servers according to claim 4 or 5, wherein 7. In the related server, at least a control file indicating the date and time when each data file was created is created in advance corresponding to each data file, and in the receiving step, a corresponding control file exists. Receiving a data file, in the storing step, if a control file having the same file name already exists in the storing means, the data file corresponding to the control file is not newly stored. 6. The data file transmission / reception method between servers according to 4 or 5. 8. In the extracting step, a control file corresponding to the extracted data file is created. In the transmitting step, a control file having the same file name is already transmitted to an associated server specified by transmission information included in the data file. 6. The method according to claim 4, wherein when the file exists, the data file is not transmitted. 9. A server for transmitting and receiving a plurality of related servers related to each other, and a data file including at least transmission data relating to a destination server between the plurality of related servers. A transfer server provided in the server, the transfer server receiving data files received from the plurality of related servers, receiving means for storing the data files received by the receiving means, Transmitting means for transmitting the data file accumulated by the accumulating means to the associated server specified by the transmission information included in the data file; and registering in advance for transmitting and receiving the data file by each of the plurality of associated servers Management information storage means for storing management information consisting of received transmission information, and The data file received from the receiving unit is extracted and sent to the storage unit.At the time of transmitting the data file, a data file including transmission information registered as management information in the management information storage unit is read from the storage unit. A network system comprising: extracting means for extracting and sending to the transmitting means. 10. The receiving means accesses a predetermined file transmission unit of a related server that does not have a predetermined transfer program for transmitting and receiving a data file among the plurality of related servers, and is created by the related server. 10. The network system according to claim 9, wherein the temporarily stored data file is taken out from the file transmitting unit. 11. The management information storage means stores at least identification data for specifying each related server, and at least a list of master data of the transmission information indicating a related server of a transmission destination by the identification data. 11. The network system according to claim 9, wherein 12. In addition to the related server, a backbone system server that performs predetermined backbone processing is provided, and further stores a data file transmitted and received between the backbone system server and the related server. 10. A main processing database is provided.
Or the network system according to 10. 13. The network system according to claim 12, wherein the core processing database is provided in the transfer server.