JPH09146799A - File transfer capacity check method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the check method which transfers a file only when the transfer destination has the capacity necessary for an idle file by comparing the capacity of the file to be transferred with the idle capacity of the transfer destination before the transfer of the file. SOLUTION: When a file transfer command is inputted, the size, i.e., the capacity (a) of the file to be transferred is checked (S11). Then the size, i.e., the idle capacity (b) of an idle area in a directory where the transfer file is stored is checked at the transfer destination (S12). The capacity (a) is compared with the capacity (b), and the step proceeds to S14 when a<=b is confirmed, i.e., the idle area of the transfer destination is larger than the size of the transfer file, and the step proceeds to S15 when a>b is confirmed, i.e., the idle area is short (S13). In the S14, the requested file transfer is carried out, and only the error display is carried out in the S15 with no execution of the file transfer. Thus the waste of the circuit load and the waiting time can be evaded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file transfer capacity checking method, and more particularly to a file transfer capacity checking method for checking transfer capacity of an empty file at a transfer destination to determine whether transfer is possible.

[0002]

2. Description of the Related Art In the conventional file transfer method, when the file capacity of the transfer destination is insufficient during the transfer, the transfer is stopped at that point, error processing is executed and terminated, and then the file is newly transferred to the transfer destination. I was retrieving the file again.

When the file capacity becomes insufficient,
There is a way to find an empty file and secure it to continue the initial file transfer.

Further, there has been proposed a method of starting a file transfer after securing a file capacity necessary for the transfer destination before the file transfer.

[0005]

As described above, in the conventional file transfer method, useless processing occurs when the file capacity is insufficient at the transfer destination, which is particularly noticeable when transferring a large capacity file. there were.

Further, the method of continuing the transfer process while securing an empty file requires a long time to process the entire transfer job, and the transferred file is not in the continuous area, so that it is not practical.

Further, in the method of starting the transfer process after securing a file having a required capacity at the transfer destination, the preprocessing for the transfer process (file capacity securing process) is included in the transfer job. However, not only is the processing of the entire transfer job time-consuming, but also the processing is complicated and not practical.

An object of the present invention is to avoid the problems of the conventional file transfer method as described above, and to provide a file transfer capacity check method for executing file transfer only when a required capacity of an empty file exists at the transfer destination. It is to be realized.

[0009]

According to the file transfer capacity check method of the present invention, when a transfer file stored in a transfer source is transferred to an empty file area of a transfer destination, the capacity of the empty file area is equal to that of the transfer file. When the capacity of the transfer file is exceeded, the transfer processing of the transfer file is executed, and when the capacity of the empty file area is less than the capacity of the transfer file, the transfer processing of the transfer file is not executed.

Further, in the file transfer capacity check method of the present invention, the transfer source capacity and the transfer destination directory name are notified from the transfer source to the transfer destination, and the transfer destination calculates an empty capacity of the designated directory name. And compares the transfer file capacities to report to the transfer source whether or not the free space exceeds the transfer file capacity, and the transfer source determines when the free space exceeds the transfer file capacity. It is realized by transferring the transfer file to the transfer destination and not transferring the transfer file to the transfer destination when the free space is less than the capacity of the transfer file.

Further, in the file transfer capacity check method of the present invention, the transfer destination notifies the transfer source of the name of the transfer file to report the capacity of the transfer file, and the transfer destination specifies the directory name for receiving the transfer file. The free space is calculated, and when the free space exceeds the capacity of the transfer file, the transfer source is notified that the transfer file can be transferred, and the transfer source responds to the transfer enable notification. Is transferred to the transfer destination.

[0012]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the drawings.

FIG. 1 is a conceptual diagram showing an embodiment of the present invention. In the figure, in the file transfer capacity check method of the present invention, when a transfer command is input, first, the size (capacity a) of the file to be transferred (transfer file) is investigated (S11). Next, the size of the empty area (empty capacity b) in the directory that stores the transfer file is examined at the transfer destination (S12).

Then, the above a and b are compared, and a ≦ b
That is, if the empty area of the transfer destination is larger than the size of the transfer file, the process proceeds to S14, and if a> b, that is, the empty region is insufficient, the process proceeds to S15 (S13).

Finally, in S14, the requested file transfer is executed, and in S15, the file transfer is not executed and only an error is displayed.

FIG. 2 is an explanatory diagram showing a PUT type capacity check method for inputting a command from a transfer source and transmitting data. In the figure, first, the input transfer file name and transfer destination directory name are recognized, the capacity of the transfer file is checked, and the capacity and the designated directory name are sent to the transfer destination as check data (S21).

The transfer destination checks the free capacity of the designated directory and compares it with the transfer file capacity notified from the transfer source. Then, when the free space exceeds the transfer file capacity, “0” is reported, and when the free space is insufficient, “1” is reported to the transfer source (S22).

The transfer source transfers data when "0" is received (S23, S24) and outputs a message that the capacity is insufficient when "1" is received and does not transfer data (S23, S25). ).

FIG. 3 is an explanatory diagram showing a GET type capacity check method of receiving a data by inputting a command at the transfer destination. In the figure, first, a transfer file name is designated and sent to the transfer source (S31).

Then, the transfer source checks the capacity of the designated file and reports it to the transfer destination as check data (S3).
2).

The transfer destination investigates the free space of the directory which is the receiving place and compares it with the transfer file size. When the transfer file size exceeds the free space of the directory, "0" is transmitted to the transfer source to transfer. Instruct to send the file (S33, S34). If the free space is insufficient, an error is output and the data transfer is not performed (S3).
3, S35).

The transfer source executes the data transfer according to the instruction from the transfer destination (S36).

[0023]

As described above, according to the present invention, the transfer file capacity is compared with the transfer destination free capacity before file transfer, and if the transfer destination free capacity is insufficient with respect to the transfer file capacity, an error occurs. Since file transfer is not performed by the above method, there is an effect of avoiding the line load and the waste of waiting time of transferring the data of the empty capacity regardless of the occurrence of an error.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram showing an example of a PUT type operation.

FIG. 3 is an explanatory diagram showing a GET type operation example.

[Explanation of symbols]

 S11 Step for checking size of transfer file S12 Step for checking size of transfer destination empty area S13 Step for making comparison S14 Step for executing file transfer S15 Step for displaying error

Claims (3)

[Claims] 1. When transferring a transfer file stored in a transfer source to an empty file area of a transfer destination, when the capacity of the empty file area exceeds the capacity of the transfer file, transfer processing of the transfer file is performed. A method for checking file transfer capacity, which is executed, and when the capacity of the empty file area is less than the capacity of the transfer file, the transfer processing of the transfer file is not executed. 2. The transfer file capacity and the transfer destination directory name are notified from the transfer source to the transfer destination, and the transfer destination calculates an empty capacity of the designated directory name and compares the transfer file capacities. The transfer source reports whether or not the free space exceeds the transfer file capacity, and the transfer source transfers the transfer file to the transfer destination when the free space exceeds the transfer file capacity. ,
A file transfer capacity check method, wherein the transfer file is not transferred to the transfer destination when the free space is less than the capacity of the transfer file. 3. The transfer destination notifies the transfer source of the name of the transfer file to report the capacity of the transfer file, and the transfer destination calculates an empty capacity of a directory name for receiving the transfer file, and the free capacity is When the capacity of the transfer file is exceeded, the transfer source notifies the transfer file that the transfer file is transferable, and the transfer source transfers the transfer file to the transfer destination in response to the transfer enable notification. How to check file transfer capacity.