JPH07168771A - Method and system for relay type file transfer - Google Patents

Abstract

PURPOSE:To efficiently perform file transfer by repeating an operation to perform the file transfer to a previously decided adjacent logic system after judging a file transfer route from a line state between its own logic system and an adjacent logic system and the logic system neighbored to a position ahead. CONSTITUTION:The logic system 2, after receiving the transfer request of a file from a user 1, transmits a telegram inquiring the line state with all the destinations neighbored to the position ahead from an inquiry telegram transmission means 55 to the adjacent logic system, and receives a result from a line information managing means 52, and affects it on a transfer managing table 54, and also, decides a transmission route. In such a way, all the line states on the route can be recognized not only between the adjacent logic system but between the adjacent logic system and the logic system ahead before file transfer is performed. In this way, it is possible to prevent the efficiency of file transfer from being lowered due to a line fault or the overload of a line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file transfer method and system between a plurality of logical systems in a hierarchical network system in which each node is connected by a communication line as a plurality of logical systems having a data processing device. Regarding

[0002]

2. Description of the Related Art Conventionally, in file transfer between logical systems constituting each node in a hierarchical network system, it is necessary to transfer the file to any adjacent logical system for all logical systems targeted for file transfer. The decision as to whether or not to make a decision is made only by the line state between the own logical system and the logical system adjacent to the own logical system, and the file is transferred to the adjacent logical system that is judged to be optimum.

In the conventional file transfer system, in the hierarchical network system, the transfer destination of the next file is determined only by the line state with the adjacent logical system, so it is judged as the transfer destination. It was not possible to grasp the line status between the adjacent logical system and the next adjacent logical system.

For this reason, if communication is disabled due to a line failure or the like between the adjacent logical system determined to be the transfer destination and the adjacent logical system in the future, the file is requested as requested by the user. There was a defect that file transfer was delayed due to not being transferred or line overload.

In order to efficiently transfer a file from a logical system of a transfer source to a logical system of a transfer destination of a file, between the own logical system and a logical system adjacent thereto and this adjacent logical system. After determining the file transfer path from the line status between the logical system to be connected and the logical system adjacent to it, the operation of transferring the file to the adjacent logical system that was previously determined is repeated. Transfer files to the logical system.

As a concrete realization means, a transfer management table composed of a candidate path having a destination as a key, a line state of this path and a transfer file, and a transfer request from a user or a logical system as a transfer source , A line status inquiry message, and a request message receiving / transfer file receiving means for receiving a transfer file, and a question for transmitting an inquiry message for the line status between the transfer destination based on the information in the transfer management table to an adjacent logical system A message transmitting means, a file transfer / system information transmitting means for transmitting the transfer file and the destination information of the transfer destination to the adjacent logical system determined to be the transfer destination based on the information of the transfer management table, and a self-collecting means for collecting in real time. Obtained by the line information between the logical system and the adjacent logical system and the response message to the line status inquiry message. Line information management means for managing line information with the destination adjacent logical system, reflecting the result in the transfer management table, and returning information on the line state with the transfer destination to the request source that issued the transfer request, Transfer end information is received from an adjacent logical system and the result is reflected in the transfer management table, and transfer end information received by the end information reception unit is transferred to the request source that issued the transfer request. And an end information notifying means for returning.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings.

FIG. 2 is an overall configuration diagram of a network system showing a plurality of logical systems in a hierarchical structure for explaining an embodiment of the present invention. The logical system 2 is under a user 1. , And below it the logical system 31,
32 and 33, and further below that, the logical system 4
It shows that there are 1, 42. This means that the parts connected by a solid line are connected by a communication line, and the logical system 31 and the logical system 42 are in a state of being disconnected due to a line failure.

Next, regarding the configuration of the logical system, the user 1
3 which is a block configuration of the logical system 2 which is a transmission source which receives a transfer request from the computer, and FIG. 4 which is a block configuration diagram of the logical system 32 which is an intermediate destination.

The logical system 2 of FIG. 3 has a transfer management table 5 composed of a candidate path having a file transfer destination as a key, a line state of this path, and a transfer file.
4, a request message reception / transfer file reception means 51 for receiving a transfer request from the user 1, and a transfer management table 5.
4, the transfer file and the destination information of the transfer destination based on the information in the transfer management table 54 and the inquiry message transmitting means 55 for transmitting the inquiry message of the line status with the transfer destination to the adjacent logical system based on the information of 4). To the adjacent logical system determined to be the transfer destination, the line information between the file transfer / system information transmitting unit 56 and the own logical system and the adjacent logical system which are collected in real time, and the response message to the line status inquiry message. The line information managing means 52 for managing the line information with the destination adjacent logical system obtained by the above, and reflecting the result in the transfer management table 54.
Then, the transfer end information is received from the adjacent logical system and the result is reflected in the transfer management table 54, and the transfer end information received by the end information reception unit 57 is sent to the request source that issued the transfer request. End information notifying means 58 for returning transfer end information.

FIG. 4 is a block diagram of the logic system 32. The components 51 to 58 are the same. As a slight difference, the request message receiving / transfer file receiving means 51 receives a line status inquiry message from the logical system as the transfer source and sends it to the inquiry message sending means 55 at the same time as receiving the transfer request from the user 1. The transfer file and the destination information are accepted and written in the transfer file 53. In addition to the function described in FIG. 3, the line information management means 52 sends a line status response message with the transfer destination to the request source that issued the transfer request. It also has a function to return.

5 and 6 are block configuration diagrams of the logical system which is the final destination. FIG. 5 is a block configuration diagram of the logical system 31 and FIG. 6 is a block configuration diagram of the logical system 42. The function of each component is the same as that described with reference to FIGS.

FIG. 1 shows an example of the structure of the transfer management table, and particularly shows a specific example of the transfer management table 54 of the logical system 2.

The transfer management table manages transfer destination candidates according to the line status using the final destination logical system name as a key, and has transfer file data. In FIG. 1, the logical system is abbreviated as LS.

The transfer management table of FIG. 1 will be described in detail.

The destination is the logical system name of the transfer destination to which the file is transferred, and the first to third candidates mean the priority order of the use route to each destination. The information of the use route is the adjacent logical system A which is the adjacent system of the logical system 2.
And the logical system 2 are managed by the line status between the adjacent logical system A and the adjacent logical system B which is further adjacent thereto.

Regarding the line status, the load status of the line is classified into six levels, and in addition to that, in the case of a failure status, it is expressed as "OFF".

Looking at the lines between the logical system 2 and the adjacent system A in FIG. 1, the lines between the logical systems 2 and 31, the lines between the logical systems 2 and 33, and the logical systems 2 and 32.
It shows that the load is light in the order of the line with.

Transfer files 1 and 2 are files for which transfer is requested. FIG. 1 shows that in the logical system 2, the file AAA is transferred to the logical systems 31, 32, 41 and 42.
It indicates that a request has been made to transfer the file BBB to the logical system 41. A blank column means that there is no transfer request. Using this transfer management table,
The transfer route of each file is optimized based on the priority order of the route candidates, the line status, and all destinations of the transfer file.

Next, the processing flow of the present invention will be described with reference to FIGS. 2 to 6 by taking the case of transferring the file AAA in FIG. 1 as a specific example.

In FIG. 3, the logical system 2 receives the file transfer request from the user 1 and then the adjacent logical system 3
The inquiry message sending means 55 sends a message for inquiring about the line status to all the destinations adjacent to the destinations 1 and 32, the result is received from the line information management means 52, and the transfer management table 54 is received. And the transmission route is determined. As can be seen from FIG. 2, the logical system 3
Since the communication line between 1 and 42 is cut off due to a failure, the file is transmitted to the logical system 42 by the second candidate route, and the logical system 32 is transmitted to the logical system 41 as an intermediate destination. Forward.

When the transfer is not performed first from the adjacent logical system, that is, when the line between the adjacent logical system such as the logical system 31 cannot be used due to a failure or is the final destination. Send only transfer files to.

The logical systems 32, 41, etc., which further transfer files from the adjacent logical system to the first, also send destination information in addition to the transfer file. The transfer file and the destination information are both file transfer / system information transmitting means 56.
To the adjacent logical system via.

The logical system 32 shown in FIG. 4 transmits an inquiry message to the adjacent logical system 41 based on the transfer management table 54 to inquire about the line state between the adjacent logical system 42 and the adjacent adjacent logical system 42. It is transmitted via the means 55 and the result is received by the line information management means 52, reflected in the transfer management table 54, and the logical system 2
Also returns the line status response message. After that, request message reception
The transfer file receiving means 51 receives the transfer file and the destination information from the logical system 2, writes them in the transfer file 53 and the transfer management table 54, and then transfers them to the logical system 41 via the file transfer / system information transmitting means 56. And send the destination information.

Hereinafter, even when a large number of logical systems are connected, the logical system that receives the transfer request performs the same processing on the adjacent logical system. That is, files are transferred in relay format until there is no destination.

When a file BBB is transferred from the logical system 2 to the logical system 41, if there is a part where the logical systems are not connected in the middle, a path that is not connected at the destination is used. Then, in the same way, transfer the file to the final destination.

In FIG. 5, the final destination is the logical system 31.
However, when the request message reception / transfer file reception means 51 receives the line status inquiry message from the logical system 2, the line information management means 52 becomes the next destination logical system 42.
The line status between and is returned to the transfer source logical system 2 as a line status response message (in this case, it is in the "disconnected status"). After the line status response message is transmitted, the request message reception / transfer file reception means 51 receives the transfer file from the logical system 2 and writes it in the transfer file 53, and then from the end information notification means 58 to the transfer request source logical system 2. The end information is transmitted.

In FIG. 6, the final destination is the logical system 42.
However, the request message reception / transfer file receiving means 51 receives the transfer file from the logical system 41, and transfers the transfer file 5
After writing in 3, the end information notifying means 58 transmits the end information to the logical system 41 of the transfer source.

As described above, according to the present invention, the state of all lines on a route is determined not only between the adjacent logical systems but also between the adjacent logical system and the next adjacent logical system. By grasping before transfer
There is an effect that it is possible to avoid a decrease in file transfer efficiency due to a line failure or a line overload.

[Brief description of drawings]

FIG. 1 is a specific example of a transfer management table of a logical system 2.

FIG. 2 is an overall configuration diagram of a hierarchical network system of the present invention.

FIG. 3 is a block configuration diagram of a logical system 2 which is a transmission source.

FIG. 4 is a block diagram of a logical system 32 that is an intermediate destination.

FIG. 5 is a block configuration diagram of a logical system 31 which is the final destination because the line to the previous adjacent system is not connected.

FIG. 6 is a block configuration diagram of a logical system 42 which is a final destination.

[Explanation of symbols]

 1 user 2, 31, 32, 33, 41, 42 logical system 51 request message reception / transfer file reception means 52 line information management means 53 transfer file 54 transfer management table 55 inquiry message transmission means 56 file transfer / system information transmission means 57 End information receiving means 58 End information notifying means

Claims (2)

[Claims] 1. A relay-type file transfer method for transferring a file from a higher logical system to a lower logical system by forming a hierarchical network system with a plurality of logical systems by communication lines, and a logical system of a transfer source. To the logical system to which the file is transferred, in order to transfer the file efficiently, between the own logical system and the adjacent logical system, and between this adjacent logical system and the logical system that is further adjacent. A relay-type file transfer method that transfers a file to the target logical system by repeating the operation of transferring the file to the adjacent logical system that was previously determined after determining the file transfer route from the line status. 2. A transfer management table composed of a candidate route having a destination as a key, a line status of this route and a transfer file, a transfer request from a user or a logical system as a transfer source, a line status inquiry message, And a request message receiving / transfer file receiving means for receiving a transfer file, and a question message transmitting means for transmitting an inquiry message of a line state between the transfer destination and an adjacent logical system based on the information of the transfer management table, A file transfer / system information transmitting means for transmitting the transfer file and the destination information of the transfer destination to the adjacent logical system determined to be the transfer destination based on the information of the transfer management table, and the logic adjacent to the own logical system for collecting in real time. Adjacent logical system of destination obtained by line information with system and response message to the line status inquiry message Circuit information management means for managing the line information between the transfer destination and the transfer destination, reflecting the result in the transfer management table, and returning the information of the line status with the transfer destination to the request source that issued the transfer request, and the adjacent logical system. End information receiving means for receiving the transfer end information and reflecting the result in the transfer management table, and end information notification for returning the transfer end information received by the end information receiving means to the request source which issued the transfer request A relay-type file transfer system comprising: