JP2752894B2 - File transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file transfer performed between host computers, and more particularly, to a file transfer apparatus which executes a file transfer with a priority according to the urgency of the file transfer.

[0002]

2. Description of the Related Art Conventional file transfer between host computers is performed by establishing a communication path for file transfer for each partner host computer, registering the file transfer request in a queue in a first-come-first-served manner, and sequentially executing the request. Has been taken.

[0003]

In the above-mentioned conventional method, all file transfer requests are treated as having the same level of urgency. The program itself prioritizes file transfers. However, even if the requester of the file transfer orders the file transfer requests according to the degree of urgency, the transfer scheduling control unit that schedules the file transfer or the transfer processing unit that sends the file to the communication path does not receive the first transfer request. When it is running, it will not be able to perform late-arrival but urgent file transfers until it is completed. Therefore, even with the file transfer having the priority, the priority cannot be exercised except for the regularly scheduled file transfer.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a file transfer apparatus for executing a file transfer between host computers with a priority order according to the urgency of the file transfer.

Therefore, according to the present invention, the file transfer device provided in the host computer for executing the file transfer between the host computers in accordance with the priority according to the urgency thereof is provided corresponding to the urgency of the file transfer. A transfer scheduling control unit for registering the file transfer request in a priority queue, and when a communication path provided corresponding to the urgency of the request is idle, scheduling the execution of the request; Is used by the execution of the file transfer, or an empty status management table that stores whether it is an empty status by the end, and register the file transfer request scheduled by the transfer scheduling control unit in the empty queue,
Selecting a communication path corresponding to the urgency of the request registered in the empty queue, executing a file transfer through the communication path, and determining whether the communication path is in use or in an idle state; And a transfer processing unit for registering in the status management table.

[0006]

Next, the present invention will be described with reference to the drawings.

Referring to FIG. 1 showing the configuration of an embodiment of the present invention, the file transfer apparatus 1 assigns the urgency of file transfer from a business processing unit (not shown) which is a file transfer request source. When a request is received and the request is registered in a high-, medium-, or low-priority queue corresponding to its urgency, and a communication path corresponding to the urgency of the request is available, A transfer scheduling control unit for scheduling the execution of the request; registering the scheduled request in a priority free queue or a normal free queue; and transferring a file through a communication path corresponding to the priority free queue or the normal free queue. And a transfer processing unit 4 for registering the busy or idle state of the communication path in the idle state management table 3 and a priority corresponding to a high-order urgency. A communication path 5 feed, a sharing request communication path 6 corresponding to the urgency of high rank or medium rank, the normal communication paths 7 corresponding to the urgency of the middle rank or low rank,
Having. Referring to FIG. 6, which describes details of the availability management table 3, "0" indicates that each of the priority communication path 41, the sharing request communication path 42, and the normal communication path 43 is empty due to the end of the file transfer. The index of “1” is set in the columns 44, 45 and 46 corresponding to the respective communication paths when the index is in use by executing the file transfer.

Next, referring to FIG. 2 for explaining the operation of the file transfer device, the transfer scheduling control unit 2
A high-order queue 21 for registering a file transfer request with a high-order urgency, a middle-order queue 22 for registering a file transfer request with a medium-order urgency, and a file transfer request with a low-order urgency. And a low-order queue 23.
The high-order queue 21, the middle-order queue 22, and the low-order queue 23 are scanned for file transfer requests registered in the order of high, middle, and low. Then, when there is a file transfer request registered in the high-order queue 21 in the order of scanning, the transfer scheduling control unit 2 determines that at least one of the priority transfer communication path 5 and the sharing request communication path 6 is idle. Is detected by the vacancy status management table 3, the request is sent to the transfer processing unit 4 and registered in the priority queuing queue 31. Next, when there is a file transfer request registered in the middle-rank queue 22, the transfer scheduling control unit 2 determines that at least one of the shared request communication path 6 and the normal request communication path 7 is idle. The request is detected by the management table 3, the execution of the request is scheduled in the transfer processing unit 4, and registered in the normal empty queue 32. Further, when there is a file transfer request registered in the low-priority queue 23, the transfer scheduling control unit 2 determines that the normal request communication path 7 is in a vacant state.
When the request is detected, the request is sent to the transfer processing unit 4 and registered in the normal empty queue 32.

[0009] Further, the transfer processing unit 4 scans the priority empty queue 31 and the normal empty queue 32 in order to see if the request is registered. When the request is registered in the priority free queue 31, the transfer processing unit 4 sends the file transfer request through the higher priority free communication path of the free transfer priority communication path 5 or the shared request communication path 6. Then, the index of “1” indicating that the communication path is in use is stored in the availability management table 3. Further, when the request is registered in the normal idle queue 32, the transfer processing unit 4 transmits the request through the higher-level empty communication path out of the shared request communication path 6 in the empty state or the normal request communication path 7.
The file transfer request is executed, and an index of “1” indicating that the corresponding communication path is being used is stored in the availability management table 3.

Next, referring to a flow chart 3 showing the operation of the transfer scheduling unit 2, FIG. 4A exemplifying an operation started by receiving a file transfer request, and FIG. The operation will be described with reference to FIG. 4B exemplifying the operation when the communication path availability notification received from the transfer processing unit 4 has been used.

First, the transfer scheduling control unit 2
Referring to FIG. 4A, when a file transfer request with a middle priority is received from the business processing unit (Step 201 in FIG. 3), it is registered in the middle queue 22 (Step 202). Then, the transfer scheduling control unit 2 scans from the high-order queue to the middle-order queue and then to the low-order queue (step 203), and finds a request registered in the high-order queue 21 (step 2).
04 Y). The transfer scheduling control unit 2 checks whether or not the priority transfer communication path 5 or the sharing request communication path 6 corresponding to the high-order queue 21 is vacant by using the vacancy management table 3. Vacancy management table 3
Priority transfer communication path 441 and share request communication path 45
Since both 1 are "0", there is an empty state (step 2
05 Y). Then, the transfer scheduling control unit 2
Sends the request registered in the high-order queue 21 to the transfer processing unit 4, and
(Step 206).

Next, the operation of the transfer scheduling controller 2 when the execution of the file transfer is completed will be described with reference to FIG. Upon acceptance (step 207), the transfer scheduling control unit 2 scans the rank queue (step 203) and finds a request registered in the middle rank queue (Y in step 204).
Whether the share request communication path 6 or the normal communication path 7 corresponding to the middle-rank queue 22 is vacant is checked by using the vacancy management table 3 (step 205). The transfer scheduling control unit 2 has an empty status management table 3
It is determined that the shared communication path 452 and the normal request communication path 462 are “0” indicating an empty state (Y in step 205). Then, the transfer scheduling control unit 2
Sends the request registered in the middle-ranking queue 22 to the transfer processing unit 4 and registers it in the normal empty queue 32 of the transfer processing unit 4 (step 206).

FIG. 6A illustrates the operation when the transfer processing unit 4 receives a transfer request scheduled from the transfer scheduling control unit 2, and the operation when the transfer processing unit 4 receives a transfer end notification from the communication path. The operation of the transfer processing unit 4 will be described with reference to a flowchart 5 with reference to FIG. 6B.
When a transfer request is received from the middle-order queue 23 (step 301), the transfer request is registered in the normal empty queue 32 (step 302). The transfer processing unit 4 scans the vacant queue from the highest order, finds a request registered in the priority queuing queue (Y in step 304), and searches the priority in the vacancy status management table 3 corresponding to the priority queuing queue 31. Since both the communication path 443 and the sharing request communication path 453 are “0”, the request registered in the priority empty queue 31 is passed through the higher priority communication path 5 (Y in step 305). Execute transfer (step 306). Then, the transfer processing unit 4 sets “0” of the priority transfer communication path 443 of the empty state management table 3 to “1” to make the priority transfer communication path 443 in use (step 307). Further, referring to FIG. 6B, when receiving the transfer end notification (step 308), the transfer processing unit 4 changes the normal communication path 464 whose transfer has been completed from “1” in use to “0” in the idle state. hand,
The transfer scheduling controller 2 is notified of the end of the transfer (step 309). Further, the transfer processing unit 4 scans the priority free queue 31 and the normal free queue 32 from the highest order, and executes the file transfer of the request registered in the normal free queue 32 through the normal request communication path 7 ( Steps 304 to 307). In the operation of the transfer scheduling control unit 2 or the transfer processing unit 4, when there is no request registered in each queue, each operation ends.

[0014]

As described above, according to the present invention,
By providing in advance a communication path having a priority corresponding to each urgency of a file transfer request, and a corresponding priority queue and an empty queue, for example, the urgency can be set to a medium or low priority. When transferring a file that requires time and a transfer request for an urgent file occurs, the priority transfer communication path among the communication paths is:
Since the request can be assigned to the high-order request, the high-order urgency file transfer is performed without any waiting for the communication path to be idle. Also, according to the present invention, when performing file transfer in various tasks, each urgency is taken into consideration,
Since transfer scheduling can be set, the efficiency and flexibility of a series of file transfer processes can be improved.

[Brief description of the drawings]

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

FIG. 2 is a diagram illustrating priority control of file transfer by a priority queue corresponding to the urgency of a file transfer request and an empty queue corresponding to a communication path having a priority in FIG. 1;

FIG. 3 is a flowchart of an operation of a transfer scheduling control unit in FIG. 1;

FIGS. 4A and 4B are diagrams illustrating an operation when registering a transfer request in a transfer scheduling control unit, and a diagram illustrating an operation when transfer is completed, respectively;

FIG. 5 is a flowchart of the operation of the transfer processing unit in FIG. 1;

FIGS. 6A and 6B are diagrams illustrating an operation when the transfer processing unit registers the transfer request scheduled by the transfer processing unit, and a diagram illustrating the operation when the transfer is completed;

FIG. 7 is a diagram showing a configuration of an empty state management table.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 File transfer apparatus 2 Transfer scheduling control unit 3 Availability management table 4 Transfer processing unit 5 Priority transfer communication path 6 Sharing request communication path 7 Normal communication path 21 High-order queue 22 Medium-order queue 23 Low-order queue 31 Priority free Queue 32 Normally empty queue

Continuation of the front page (56) References JP-A-61-5361 (JP, A) JP-A-60-123950 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G06F 13 / 00 G06F 12/00 G06F 13/38 H04L 13/00

Claims (4)

(57) [Claims] 1. A file transfer device provided in a host computer for executing a file transfer between host computers in a priority order according to its urgency, the order queue being provided according to the urgency of the file transfer. Registering the request for file transfer, and when a communication path provided corresponding to the urgency of the request is idle, a transfer scheduling control unit that schedules execution of the request; and An empty status management table that stores whether it is in use by execution or is empty by termination, and registers a file transfer request scheduled by the transfer scheduling control unit in an empty queue, and in the empty queue Select a communication path corresponding to the registered request urgency, and To perform file transfer,
A transfer processing unit for registering whether the communication path is in use or in an empty state in the empty state management table. 2. The transfer scheduling control unit according to claim 1, wherein said high-priority request is placed in a high-priority queue, said intermediate request is placed in a medium-priority queue, or said low-priority request is placed in a low-priority queue. Are registered in the low-priority queue, and when the registration is made or when the notification of the end of the file transfer is received, the request is transmitted through the high-priority queue, the middle-priority queue, and the low-priority queue in order. It scans whether or not the communication path is registered, and among the communication paths, one of the priority transfer communication path corresponding to the higher order and the share request communication path corresponding to the middle order is in an idle state. When the execution of the request registered in the high-order queue is scheduled, any one of the shared request communication path and the low-order normal request communication path When one of the communication paths is idle, the execution of the request registered in the middle queue is scheduled to be executed.When the normal request communication path is idle, the request is registered in the low queue. 2. The file transfer device according to claim 1, wherein the execution of the request is scheduled. 3. The transfer processing unit, wherein the request of the high-order queue scheduled by the transfer scheduling control unit is assigned to a priority free queue, and the request of the medium-order queue scheduled by the transfer scheduling control unit is set. Alternatively, the request of the low-order queue is registered in a normal empty queue, and the completion notification is notified to the transfer scheduling control unit when the registration is made or upon receipt of the completion notification of the file transfer, and communication is performed. When the in-use registration of the path is deleted from the free space management table, the priority free queue and the normal free queue are scanned in order, and when the request is registered in the priority free queue, The priority transfer communication path or the sharing request communication in which a request is available The communication path is executed through a communication path having a higher priority, and the fact that the communication path is in use is registered in the availability management table.When a request is registered in the normal queue, the request is The method is executed through the higher priority communication path of the shared transfer communication path or the normal request communication path in the vacant state, and the fact that the communication path is in use is registered in the vacant state management table. The file transfer device according to claim 1, wherein 4. The vacancy management table registers “1” for each of the priority transfer communication path, the sharing request communication path, and the normal request communication path when it is in use and “ 2. The file transfer device according to claim 1, wherein "0" is registered.