JP2002157184A - File transfer device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a file transfer device and method preventing a shared network from being occupied by some of file transfers by transferring files while varying the size and interval of transfers according to the condition of the network. SOLUTION: A method controlling part 22 acquires from a time zone storing part 42 a method ID corresponding to the time of designation of a file transfer by a transfer request accepting part 1, and acquires from a method storing part 41 the interval and size of transfers and the load rate all of which match the method ID acquired from the time zone storing part 42. Next, the method controlling part 22 reads file from a file system 3 according to the name of the file to be transferred which is designated from the accepting part 1, then divides it into the transfer sizes acquired from the method storing part 41, and transfers the file, at the transfer intervals acquired from the method storing part 41 and via a communication means 5 and the network, to a destination designated from the accepting part 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file transfer apparatus and a file transfer method for transferring a file via a network, and more particularly to a file transfer apparatus and a file transfer method for transferring a file in consideration of a load on a network.

[0002]

2. Description of the Related Art In recent years, it has become common to connect each site (terminal) to a network and transfer files between the sites via the network. It is required to increase the transfer efficiency so that the transfer is completed earlier.

[0003]

However, in the prior art, when the transfer efficiency is increased so that a part of the file transfer is completed early, the network which is a shared resource is occupied by the part of the file transfer. However, the load on the network increases, which adversely affects other file transfers, and thus causes a problem in that the transfer efficiency between the sites connected to the network varies.

The present invention has been made in view of such a problem, and an object of the present invention is to perform a file transfer by changing a transfer size and a transfer interval in accordance with a network condition, so that a part of the file transfer is performed. File transfer device and file transfer that can reduce the load on the network without occupying the network, which is a shared resource for file transfer, and can level the transfer efficiency between the sites connected to the network The point is to provide a method.

[0005]

Means for Solving the Problems In order to solve the above problems, the present invention has the following constitution. The gist of the invention according to claim 1 is a file transfer device for transferring a file to another site connected to the network via the network, wherein a transfer interval and a transfer size at the time of transferring the file are set in time. Storage means for storing each band, transfer control means for obtaining the transfer interval and the transfer size from the storage means based on a time instructed to transfer the file, and transfer control means for obtaining the transfer interval and the transfer size from the storage means. And a communication unit for transferring the file to the other site via the network based on the transfer interval and the transfer size. The gist of the invention according to claim 2 is that the storage means includes a time zone storage means in which a scheme ID is stored in association with each time zone, and a load factor and the transfer interval for each scheme ID. And a method storage unit in which the transfer size is stored in association with the transfer size, wherein the load factor is set to be smaller as the method ID is smaller, and the transfer interval is smaller as the method ID is smaller. 2. The file transfer device according to claim 1, wherein the transfer size is set to be longer, and the transfer size is set to be smaller as the system ID is smaller. Claim 3
The gist of the invention described in the above is that the transfer control means causes the method ID to be acquired from the time zone storage means based on the time when the file transfer is instructed, and the method ID acquired from the time zone storage means 3. The file transfer device according to claim 1, wherein the transfer interval and the transfer size are acquired from the method storage unit based on the following. The gist of the invention according to claim 4 further comprises a communication load detecting unit that obtains the load factor of the network from the communication unit, wherein the transfer control unit is configured to transmit the load ID to the system ID obtained from the time zone storage unit. The load factor is obtained from the method storage means based on the load rate obtained from the method storage means, and the load rate obtained by the communication load detection means is compared with the load rate obtained from the method storage means. If the load factor is equal to or greater than the load factor obtained by the communication load detecting means, the method ID obtained from the time zone storing means is decremented, and the transfer interval and the transfer are transferred from the method storing means. The file transfer device according to any one of claims 1 to 3, wherein the file transfer device acquires the size. The gist of the invention described in claim 5 is that the communication load detecting means causes the load rate to be obtained from the other site connected to the network. Exists in the file transfer device. The gist of the invention according to claim 6 is that, when the transfer of the file by the communication means fails, the transfer control means decrements the method ID acquired from the time zone storage means to reduce the method storage means. And the transfer unit obtains the transfer interval and the transfer size, and the communication unit causes the transfer control unit to re-transfer the file based on the transfer interval and the transfer size obtained by subtracting the method ID. The file transfer device according to any one of claims 1 to 5, wherein The gist of the invention according to claim 7 is a file transfer method for transferring a file to another site connected to the network via the network, wherein a transfer interval and a transfer size when transferring the file are determined. The transfer interval and the transfer size are stored based on the time when the transfer of the file is instructed, and the file is stored based on the obtained transfer interval and the transfer size. Is transferred to the other site via the network. The gist of the invention according to claim 8 is that the method ID is stored in association with each time zone, and the load ratio, the transfer interval, and the transfer size are stored in association with each method ID, and the load is stored. The rate is set to be smaller as the method ID is smaller, the transfer interval is set to be longer as the method ID is smaller, and the transfer size is set to be smaller as the method ID is smaller. The file transfer method according to claim 7, wherein The gist of the invention according to claim 9 is that the stored method ID is acquired based on a time instructed to transfer the file, and the stored transfer interval and the stored interval are acquired based on the acquired method ID. The file transfer method according to claim 7 or 8, wherein the transfer size is obtained. The gist of the invention according to claim 10 is that the load factor of the network is acquired, the stored load factor is acquired based on the scheme ID, the load factor acquired based on the scheme ID, The load factor of the network is compared, and if the load factor obtained based on the method ID is equal to or greater than the load factor of the network, the method ID is subtracted from the stored transfer interval. 10. The file transfer method according to claim 7, wherein the file transfer method obtains the transfer size. The gist of the invention described in claim 11 is that the load factor is obtained from the other base connected to the network.
The file transfer method according to any one of Items 1 to 10, above. The gist of the invention according to claim 12 is that, when the file transfer fails, the method ID is subtracted to obtain the stored transfer interval and the transfer size, and the method ID is subtracted. The file transfer method according to any one of claims 7 to 11, wherein the file is re-transferred based on the acquired transfer interval and the transfer size.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of a file transfer device according to the present invention. FIG. 2 is a diagram showing an example of the contents stored in a method storage unit shown in FIG.
FIG. 3 is a diagram illustrating an example of storage contents of a time zone storage unit illustrated in FIG. 1.

In the present embodiment, a transfer request receiving unit 1, a transfer processing unit 2, a file system 3, a storage unit 4, and a communication unit 5 are provided as transfer source bases of a file transfer, and are connected via a network. Connected to a transfer destination base A and an arbitrary base B, and both are communicable via a router (not shown).

The transfer destination base A includes a communication means 6, a communication load detection unit 7, a transfer control unit 8, and a file system 9. An arbitrary base B includes a communication means 10, a communication load detection unit 11 Consists of

The transfer request receiving unit 1 designates a transfer file name and a transfer destination to the transfer processing device 2 and instructs the file transfer to the transfer processing apparatus 2 based on a file transfer request input by an operator.

The transfer processing device 2 includes a communication load detecting unit 21
And a system control unit 22, read a file from the file system 3 based on the transfer file name specified by the transfer request receiving unit 1, and transfer the read file to the transfer destination specified by the transfer request receiving unit 1. Communication means 5
And transfer over the network.

The communication load detecting section 21 detects the load rate from the communication means 5, and detects the load rate from the communication load detecting section 7 at the transfer destination point A and the communication load detecting section 11 at an arbitrary point B.
And the load factor detected from the communication means 5, the load factor of the transfer destination site A, and the load factor of the arbitrary site B are compared. The smallest load factor is notified to the method control unit 22. For example, the load factor detected from the communication unit 5 is “30”, and the load factor of the transfer destination base A is “3”.
If it is “0” and the load factor of any site B is “20”, it notifies the system controller 22 of the load factor “20”.

The detection of the load factor from the communication means 5 by the communication load detection unit 21 detects the load factor from the number of retries per fixed time stored in the communication means 5, and the load factor is determined in advance. Indicates the success rate of file transfer performed during a given period of time. For example, if the file transfer is performed 10 times per minute and succeeds once, the file transfer success rate is 10
%, And the load factor becomes “10”.

The communication load detecting section 21 is provided with the communication means 5.
Is detected in units of time divided by the time zone storage unit 42, which will be described later. For example, when the time unit divided by the time zone storage unit 42 is one hour, the detection is performed once an hour.
If the load factor is not detected in the time zone divided by the time zone storage unit 42 when the file transfer is started, the load factor is detected immediately after the start of the file transfer according to an instruction from the system control unit 22. .

The system control unit 22 acquires the system ID corresponding to the current time when the file transfer is instructed from the transfer request receiving unit 1 from the time zone storage unit 42, and
, The transfer interval and the transfer size corresponding to the method ID acquired from the method storage unit 41, the file instructed to transfer the file is read from the file system 3, and the read file is transferred from the method storage unit 41. And transfer at the transfer interval via the communication means 5 and the network.

The system control unit 22 compares the load factor notified from the communication load detection unit 21 with the load ratio corresponding to the system ID, and determines that the load factor corresponding to the system ID is the communication load detection unit 21. If the load rate is equal to or larger than the load rate notified from, the file transfer is performed by subtracting the method ID so that the load rate becomes smaller. For example, the load factor notified from the communication load detection unit 21 is “20”, and the method ID is “5”.
If the load factor corresponding to is "30", the method I
D is subtracted from “5” to “4”. In addition, method ID
The load rate notified from the communication load detection unit 21 to be compared with the load rate corresponding to the time is the one notified in the time zone delimited by the time zone storage unit 42, and is set in the time zone delimited by the time zone storage unit 42. When there is no notification of the load ratio from the communication load detection unit 21, the method control unit 22 instructs the communication load detection unit 21 to detect the load ratio.

The file system 3 is an information storage device such as a hard disk drive, in which various files are stored using file names as indexes.

The storage device 4 comprises a method storage unit 41 and a time period storage unit 42. The time period storage unit 42 is associated with a method ID for each of predetermined time periods as shown in FIG. It is stored and remembered.

As shown in FIG. 2, the system storage 41 stores
A load factor, a transfer interval, and a transfer size are stored in association with each other for each method ID, and the load factor is set to be smaller as the method ID is smaller, and the transfer interval and the transfer size are smaller. As the transfer interval becomes longer, the transfer size becomes smaller.

The communication means 5 has a function of retrying the file transfer even if the file transfer fails. The communication means 5 notifies the system control unit 22 of the success or failure of the file transfer and stores the number of times the file transfer has been retried. When requested by the communication load detection unit 21, the number of retries per fixed time is notified.

The communication means 6 and the communication means 10 store the number of times of retrying the file transfer, and when requested by the communication load detecting section 7 and the communication load detecting section 11, respectively, Notify the number of attempts.

The communication load detecting section 7 and the communication load detecting section 11 detect the load factors from the communication means 6 and the communication means 10, respectively, and transmit the detected load rates to the other through the communication means 6 and the communication means 10, respectively. Notify the load rate to the base.

The transfer control unit 8 causes the file system 9 to store the file transferred via the network and the communication means 6.

The file system 9 is an information storage device such as a hard disk drive, and stores a file transferred via the network and the communication means 6.

Next, the operation of the embodiment will be described in detail with reference to FIG. FIG. 4 is a flowchart for explaining the operation of the embodiment of the file transfer device according to the present invention.

When the transfer request receiving unit 1 specifies the transfer file name and the transfer destination and instructs the file transfer, the system control unit 22 determines the current time when the transfer request receiving unit 1 instructs the file transfer. Is acquired from the time zone storage unit 42 (step A1). For example, if the current time when the file transfer is instructed from the transfer request receiving unit 1 is 1:33 and the storage contents shown in FIG. Acquires the method ID “5” from the time zone storage unit 42.

Next, the system control unit 22 stores the time period storage unit 4
The transfer interval, the transfer size, and the load factor corresponding to the method ID obtained from step 2 are obtained from the method storage unit 41. For example,
When the scheme ID acquired from the time zone storage unit 42 is “5” and the storage contents illustrated in FIG. 2 are stored in the scheme storage unit 41, the transfer interval “6” corresponding to the scheme ID “5” is used.
0 seconds ", transfer size" 1500 bytes ", and load factor" 30 ".

Next, the system control unit 22 reads a file from the file system 3 based on the transfer file name specified by the transfer request receiving unit 1, divides the file into transfer sizes acquired from the system storage unit 41, At the transfer interval acquired from the unit 41, the data is transferred to the transfer destination specified by the transfer request receiving unit 1 via the communication unit 5 and the network (step A2). For example, when the method ID acquired from the time zone storage unit 42 is “5”, the file read from the file system 3 is divided into “1500 bytes” and transferred every “60 seconds”.

Next, the method control unit 22 determines whether or not the file transfer is completed (step A3). If the file transfer is completed, the system control unit 22 ends the file transfer operation. Determines whether there is a notification of the load factor from the communication load detection unit 21 (step A4).

When there is no notification of the load factor from the communication load detector 21, the system controller 22 instructs the communication load detector 21 to detect the load factor (step A5). While detecting the load factor from the communication means 5,
The load factor from the communication load detection unit 7 of the transfer destination site A and the load factor from the communication load detection unit 11 of the arbitrary site B are received, and the load ratio detected from the communication unit 5 and the load ratio of the transfer destination site A are received. Then, the system controller 22 is notified of the smallest load factor among the load factors of the arbitrary base B.

Next, the method control unit 22 compares the load factor notified from the communication load detection unit 21 with the load factor corresponding to the method ID (step A6). If the load factor is equal to or greater than the load factor notified from the communication load detector 21, the method ID is subtracted so as to reduce the load factor (step A7), and file transfer is performed based on the subtracted method ID (step A7). A2),
If the load factor corresponding to the method ID is smaller than the load factor notified from the communication load detector 21, the file transfer is performed based on the method ID as it is (step A).
2). Note that the method ID is not smaller than “0”.

For example, when the load factor notified from the communication load detecting unit 21 is “20” and the load factor corresponding to the system ID “5” is “30”, the system ID is set to “5”.
To “4”, and the file transfer is continued with the transfer interval “60 seconds” and the transfer size “1000 bytes” based on the method ID “4”.

It is preferable to set the load factor corresponding to each system ID stored in the system storage unit 41 to a value larger than the assumed network load factor. That is, if the load factor of the network assumed in a certain time zone is “15”, and the load factor corresponding to the method ID is “20”, the load at the time of file transfer is determined according to the load factor of the network. Since the rate decreases, the possibility of going to the assumed network load rate “15” increases.

As described above, according to the present embodiment, by performing the file transfer while changing the transfer size and the transfer interval according to the situation of the network, the network which is a shared resource for some file transfers is provided. It can reduce the load on the network without being occupied,
There is an effect that the transfer efficiency between the respective sites connected to the network can be equalized.

Next, another embodiment of the present invention will be described in detail with reference to FIG. FIG. 5 is a flowchart for explaining the operation of another embodiment of the file transfer device according to the present invention.

When the transfer request receiving unit 1 specifies the transfer file name and the transfer destination and instructs the file transfer, the system control unit 22 determines the current time when the transfer request receiving unit 1 instructs the file transfer. Is acquired from the time zone storage unit 42 (step B1). For example, if the current time when the file transfer is instructed from the transfer request receiving unit 1 is 1:33 and the storage contents shown in FIG. Acquires the method ID “5” from the time zone storage unit 42.

Next, the system control unit 22 stores the time period storage unit 4
The transfer interval, the transfer size, and the load factor corresponding to the method ID obtained from step 2 are obtained from the method storage unit 41. For example,
When the scheme ID acquired from the time zone storage unit 42 is “5” and the storage contents illustrated in FIG. 2 are stored in the scheme storage unit 41, the transfer interval “6” corresponding to the scheme ID “5” is used.
0 seconds ", transfer size" 1500 bytes ", and load factor" 30 ".

Next, the system control unit 22 reads a file from the file system 3 based on the transfer file name specified by the transfer request receiving unit 1, divides the file into transfer sizes acquired from the system storage unit 41, and At the transfer interval acquired from the unit 41, the data is transferred to the transfer destination specified by the transfer request receiving unit 1 via the communication unit 5 and the network (step B2). For example, when the method ID acquired from the time zone storage unit 42 is “5”, the file read from the file system 3 is divided into “1500 bytes” and transferred every “60 seconds”.

The system controller 22 determines whether the file transfer has succeeded or failed based on the notification from the communication means 5 (step B3). If the file transfer has failed, the system controller 22 determines whether the file transfer has failed. It is determined whether or not the ID is "0" (step C2). If the method ID when the file transfer has failed is "0", the file transfer operation is terminated and the file transfer fails. Method ID is "0"
If not, the method ID is subtracted to reduce the load factor (step C1), and file transfer is performed based on the subtracted method ID (step B2).

If the file transfer has succeeded, the system control unit 22 determines whether or not the file transfer has been completed (step B4). If the file transfer has been completed, the file transfer operation is terminated. If the transfer is not completed, it is determined whether or not there is a notification of the load factor from the communication load detecting unit 21 (step B5).

If there is no notification of the load factor from the communication load detector 21, the system controller 22 instructs the communication load detector 21 to detect the load factor (step B6). While detecting the load factor from the communication means 5,
The load factor from the communication load detection unit 7 of the transfer destination site A and the load factor from the communication load detection unit 11 of the arbitrary site B are received, and the load ratio detected from the communication unit 5 and the load ratio of the transfer destination site A are received. Then, the system controller 22 is notified of the smallest load factor among the load factors of the arbitrary base B.

Next, the scheme control unit 22 acquires again the scheme ID corresponding to the current time from the time zone storage unit 42 (step B7), and loads the load factor corresponding to the acquired scheme ID and the communication load detection unit 21. (Step B8), and the load factor corresponding to the acquired method ID is
If the load factor is equal to or greater than the load factor notified from the communication load detector 21, the method ID is subtracted so as to reduce the load factor (step B9), and file transfer is performed based on the subtracted method ID (step B9). B2) If the load factor corresponding to the acquired method ID is smaller than the load factor notified from the communication load detection unit 21, step B7.
A file transfer is performed based on the method ID acquired in (2) (step B2).

In another embodiment, even if the method ID is lowered in step C1 by retrying the file transfer,
In step B7, to obtain the method ID from the current time,
It can be increased to an appropriate load factor.

In the present embodiment, a case has been described in which three bases, a transfer source base, a transfer destination base A, and an arbitrary base B, are connected to the network. However, the number of bases is not limited. May have the same functions as those of the communication load detectors 21, 7, and 11. When there are a plurality of communication routes, it is preferable to infer the communication route in advance and to validate only the load factor from the base serving as the communication route.

It is apparent that the present invention is not limited to the above embodiments, and that the embodiments can be appropriately modified within the scope of the technical idea of the present invention. Further, the number, position, shape, and the like of the constituent members are not limited to the above-described embodiment, but can be set to numbers, positions, shapes, and the like suitable for carrying out the present invention. In the drawings, the same components are denoted by the same reference numerals.

[0046]

According to the file transfer apparatus and the file transfer method of the present invention, by performing file transfer by changing the transfer size and the transfer interval according to the network situation, the network which is a shared resource for a part of the file transfer is used. Without being occupied, the load on the network can be reduced, and the transfer efficiency between the sites connected to the network can be leveled.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a file transfer device according to the present invention.

FIG. 2 is a diagram illustrating an example of storage contents of a method storage unit illustrated in FIG. 1;

FIG. 3 is a diagram illustrating an example of storage contents of a time zone storage unit illustrated in FIG. 1;

FIG. 4 is a flowchart for explaining the operation of the embodiment of the file transfer device according to the present invention.

FIG. 5 is a flowchart for explaining the operation of another embodiment of the file transfer device according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 transfer request receiving unit 2 transfer processing device 3, 9 file system 4 storage device 5, 6, 10 communication means 7, 11, 21 communication load detection unit 22 system control unit 41 system storage unit 42 time zone storage unit 8 transfer control unit A Transfer destination base B Optional base

Claims (12)

[Claims] 1. A file transfer apparatus for transferring a file to another site connected to the network via the network, wherein a transfer interval and a transfer size for transferring the file are stored for each time zone. Storage means, transfer control means for obtaining the transfer interval and the transfer size from the storage means based on the time instructed to transfer the file, and the transfer interval obtained by the transfer control means. Communication means for transferring the file to the other site via the network based on the transfer size. 2. The method according to claim 1, wherein the storing means stores a method I for each of the time zones.
A time zone storage unit in which D is stored in association with each other; and a system storage unit in which a load factor, the transfer interval, and the transfer size are stored in association with each other for each of the system IDs, The load factor is set to be smaller as the scheme ID is smaller, the transfer interval is set to be longer as the scheme ID is smaller, and the transfer size is smaller as the scheme ID is smaller. 2. The file transfer device according to claim 1, wherein the file transfer device is set. 3. The method according to claim 2, wherein the transfer control unit obtains the system ID from the time zone storage unit based on a time instructed to transfer the file, and determines the system ID based on the system ID obtained from the time zone storage unit. 3. The file transfer device according to claim 1, wherein the transfer interval and the transfer size are acquired from the method storage unit. 4. A communication load detecting unit for obtaining the load factor of the network from the communication unit, wherein the transfer control unit is configured to store the system load based on the system ID obtained from the time zone storage unit. The load rate obtained from the method storage means, and the load rate obtained by the communication load detection means is compared with the load rate obtained from the method storage means, the load rate obtained from the method storage means, When the load rate obtained by the communication load detecting means is equal to or larger than the load rate, the method ID obtained from the time zone storing means is decremented to obtain the transfer interval and the transfer size from the method storing means. The file transfer device according to any one of claims 1 to 3, wherein 5. The file transfer device according to claim 1, wherein the communication load detection unit causes the load factor to be obtained from the other site connected to the network. 6. When the transfer of the file by the communication unit has failed, the transfer control unit decrements the method ID obtained from the time zone storage unit and sets the transfer interval and the transfer interval from the method storage unit. And a transfer size, and the communication unit is configured to transmit the system ID by the transfer control unit.
6. The file transfer apparatus according to claim 1, wherein the file is re-transferred based on the transfer interval and the transfer size obtained by subtracting the following. 7. A file transfer method for transferring a file to another site connected to a network via the network, wherein a transfer interval and a transfer size for transferring the file are stored for each time zone. Acquiring the stored transfer interval and the transfer size based on the time instructed to transfer the file; and transmitting the file to the other base based on the acquired transfer interval and the transfer size. A file transfer method characterized by transferring via a network. 8. A method ID is stored for each of the time zones, and a load factor, the transfer interval, and the transfer size are stored for each of the method IDs. The transfer interval is set to be longer as the method ID is smaller, and the transfer size is set to be smaller as the method ID is smaller. The file transfer method according to claim 7. 9. Acquiring the stored method ID based on a time instructed to transfer the file, and acquiring the stored transfer interval and the transfer size based on the acquired method ID. 9. The file transfer method according to claim 7, wherein: 10. Obtaining the load factor of the network, obtaining the stored load factor based on the method ID, the load factor obtained based on the method ID, and the load factor of the network. And when the load factor obtained based on the scheme ID is equal to or greater than the load factor of the network, the scheme ID is subtracted and the stored transfer interval and transfer size are calculated. The file transfer method according to any one of claims 7 to 9, wherein the file transfer method is obtained. 11. The file transfer method according to claim 7, wherein the load factor is obtained from the other site connected to the network. 12. When the transfer of the file fails, the method obtains the transfer interval and the transfer size by subtracting the method ID, and obtains the transfer interval obtained by subtracting the method ID. 12. The file transfer method according to claim 7, wherein the file is re-transferred based on the transfer size.