JPH04245355A - File transfer system - Google Patents

Abstract

PURPOSE:To enable high-performance file transfer which utilizes the processing ability of a communication line sufficiently without generating any free time in processes of a communication means and a communication line. CONSTITUTION:A host load monitor means 10 monitors the load state (e.g. CPU use rate) of a host and actuates a data transmitting means 7 when judging that the load is small. The data transmitting means 7 puts plural records, stored in a buffer 8, together in one similarly to actuation from a record storage means 6 even if the buffer 8 is not full, and actuates a communication means 11 to send data to a reception-side system 2.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transferring files between a plurality of systems connected by communication circuits.

0002

[Background Art] Conventionally, when transferring files between multiple systems connected by a communication line, the sending system transfers the records stored in the file as is to the receiving side through the communication line, taking performance into consideration. Rather than transmitting it to the system, multiple records are sent together as one data in a format determined by a protocol (a predetermined agreement between the transmitting system and the receiving system).

[0003] At this time, when combining multiple records into one data, a record storage means for temporarily storing the multiple records is prepared, and the records read from the file are temporarily stored, and the buffer is When the buffer was full of records, the records in the buffer were combined into one piece of data and the data was sent to the receiving system.

0004

However, the conventional file transfer method described above has the following drawbacks.

[0005] In the sending system, the data sending process is often temporarily interrupted due to factors such as input/output of the transfer source file, processing of the file transfer business program, and system load status. Since the data is not passed to the communication means while the records are still stored in the memory, there is idle time in the processing of the communication means and the communication line. File transfer is not possible.

[0006]

[Means for Solving the Problems] The file transfer method according to the present invention is a file transfer method between a plurality of systems connected by a communication circuit, and is a method for transferring files between a plurality of systems connected by a communication circuit. A file, a file transfer business program that reads records from the transfer source file, and sends the records to the receiving system in the file transfer, and a file transfer business program that is started by the file transfer business program and that executes the process of transferring records between the file and the receiving system regarding the file transfer. A file transfer protocol execution means that sends and receives control data and file records necessary for file transfer according to a predetermined agreement (protocol), and sends multiple records to the receiving system in a format specified by the protocol. a buffer for temporarily accumulating a plurality of records in order to send them all together as one data; and a record storage for accumulating records passed from the file transfer business program in the buffer in the file transfer protocol execution means. means, and when the records accumulated in the buffer by the record accumulation means reach a certain amount or more, the records accumulated in the buffer are combined into one data in a format specified by the protocol. Data transmission means to be sent to the receiving system, control data that is activated by the file transfer protocol execution means and transmitted and received by the file transfer protocol execution means to and from the receiving system, and file records in a format specified by the protocol. In the file transfer sending system, which consists of a communication means that sends and receives the data summarized in the above communication line, the host's load status is monitored, and if the load is determined to be low, the data sending means is A host load monitoring means is activated to send data to the receiving system regardless of the amount of records stored in the buffer.

[0007] Furthermore, the load state of the communication line is monitored, and if it is determined that the load is low, the data transmission means is activated, and the receiving side system It has line load monitoring means for transmitting data to.

[0008]

[Operation] According to the present invention, unlike the conventional file transfer method that sends data to the receiving system when the buffer is full, the transfer source file can be transferred even if the buffer is not full. Due to factors such as input/output, file transfer business program processing, and system load status,
If the data transmission process is temporarily interrupted, the records accumulated in the buffer at that time are sent to the receiving system, making full use of the processing power of the communication line to create a high-performance file. enable transfer.

[0009]

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

Referring to FIG. 1, one embodiment of the present invention includes:
Sending side system 1, receiving side system 2, transfer source file 3, file transfer business program 4, file transfer protocol execution means 5, record storage means 6, data transmission means 7, buffer 8, host load monitoring means 10, communication means 11 , a communication line 12, and a transfer destination file 13.

Next, the operation of the present invention will be explained with reference to the drawings.

[0012] The sending system 1 and the receiving system 2 are as follows:
They are connected by a communication line 12, and the sending system 1 has the source file 3 for file transfer, and the receiving system 2 has the destination file 13 for file transfer.
exists.

The operation of the transmitting system when a file is transferred between the transmitting system 1 and the receiving system 2 through the communication line 12 will be explained below.

[0014] The transfer source file 3 stores a plurality of records.

The file transfer business program 4 reads the record in the transfer source file 3 and starts the file transfer protocol execution means 5.

When the file transfer protocol execution means 5 receives a record from the file transfer business program 4, it activates the record storage means 6.

The record storage means 6 checks the size of the record stored in the buffer 8, which is an area for temporarily storing records passed from the file transfer business program 4.

If there is space in the buffer 8, records passed from the file transfer business program 4 are stored in the buffer 8.

If the buffer 8 is full of already stored records, the data transmitting means 7 is activated.

The data transmitting means 7 combines the plurality of records accumulated in the buffer 8 into one data according to a predetermined agreement (protocol) with the receiving system 2, and sends the communication means 11 to the data transmitting means 7. It starts up, transmits data to the receiving system 2, and initializes the buffer 8.

On the other hand, the host load monitoring means 10 monitors the load state (for example, CPU usage rate) of the host, and activates the data transmission means 7 when it is determined that the load is low.

[0022] The data transmission means 7 includes the record storage means 6
As in the case where the buffer 8 is started up, multiple records accumulated in the buffer 8 are combined into one data, the communication means 11 is started up, the data is sent to the receiving system 2, and the buffer 8 is initialized. become

File transfer is executed by repeating the above steps. (Other Embodiments) FIG. 2 is a diagram showing another embodiment of the present invention, in which the data transmitting means 7 sends a plurality of records accumulated in the buffer 8 to the receiving side system 2.
The communication means 11 is activated to transmit the data to the receiving system 2, and the buffer 8 is initialized.

On the other hand, the line load monitoring means 14 monitors the load state of the communication line, and activates the data transmitting means 7 if it is determined that the load is low.

The data transmitting means 7 includes the record storing means 6
As in the case where the buffer 8 is started up, multiple records accumulated in the buffer 8 are combined into one data, the communication means 11 is started up, the data is sent to the receiving system 2, and the buffer 8 is initialized. become

File transfer is executed by repeating the above steps.

[0027]

[Effects of the Invention] As explained above, in the present invention, data transmission processing may be temporarily interrupted in the sending system due to factors such as input/output of the transfer source file, processing of the file transfer business program, and system load status. Even if there is an interruption, if the host load (e.g. CPU usage) or line load is low, the records stored in the buffer will be treated as one data even if the buffer is not full at that time. By sending it to the receiving system,
It is possible to perform high-performance file transfer that fully utilizes the processing capacity of the communication line without causing idle time in the processing of the communication means and the communication line.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing another embodiment of the present invention.

[Explanation of symbols]

1 Sending side system, 2 Receiving side system, 3 Transfer source file, 4 File transfer business program, 5 File transfer protocol execution means, 6 Record storage means, 7 Data sending means, 8 Buffer, 10 Host load monitoring means, 11 Communication means , 12 communication line, 13 transfer destination file, 14 line load monitoring means.

Claims (2)

[Claims] Claim 1: A file transfer method between a plurality of systems connected by a communication circuit, comprising: a transfer source file storing a transfer source record in file transfer;
A file transfer business program that reads records from the transfer source file and sends the records to the receiving system in the file transfer, and a file transfer business program that is started by the file transfer business program and is predetermined with the receiving system regarding file transfer. A file transfer protocol execution means that sends and receives control data and file records necessary for file transfer according to the protocol, and a file transfer protocol execution means that collects multiple records in the format specified by the protocol to the receiving system. a buffer for temporarily storing a plurality of records in order to transmit them as one data; a record storage means for storing records passed from the file transfer business program in the buffer in the file transfer protocol execution means; When the records accumulated in the buffer by the record accumulation means reach a certain amount or more, the receiving side system collects the records accumulated in the buffer into one data in a format specified by the protocol. data transmission means to be sent to the system, control data to be sent to and received from the receiving system, and file records activated by the file transfer protocol execution means in a format specified by the protocol. In a file transfer sending system comprising communication means for transmitting and receiving data through the communication line, the load state of the host is monitored, and if the load is determined to be low, the data transmission means is activated. A file transfer method comprising host load monitoring means for transmitting data to a receiving system regardless of the amount of records stored in the buffer. 2. Monitoring the load state of the line, and when determining that the load is low, activating the data transmitting means to receive data regardless of the amount of records accumulated in the buffer. 2. The file transfer method according to claim 1, further comprising line load monitoring means for transmitting data to the side system.