JPH03294938A - Distributed communication system - Google Patents

Abstract

PURPOSE:To reduce the load on a network and to improve the system efficiency by transferring automatically a file in a device from a device whose access frequency is low to a device whose access frequency is high. CONSTITUTION:In the case the other device accesses a file in its own device 1, its own device 1 recognizes the device which accesses the file in its own device 1 by a file access information storage part 13, and by the stored data, an access information processing part 14, processes the data and judges whether it is more effective for the system efficiency that the object file exists in the external device than existing in its own device or not by using a threshold storage part 15 and a comparing part 16. In such a state, in the case it is judged that it is more effective for the system efficiency to move its file to the other device than to its own device 1, its file is transferred automatically to the other device. In such a manner, the load on the network is reduced, and the system can be operated efficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is applied to a distributed communication system composed of devices having computers with communication functions. Relating to an improved distributed communication system.

〔overview〕

The present invention is a distributed communication system in which multiple devices each having a computer are connected to the same network, and each device mutually accesses and transfers files held by each device. Based on the information, it is automatically determined whether it is more effective for system efficiency to move the file to another device than the own device, and if it is determined to be effective, the file is transferred to the other device. This aims to improve the efficiency of the system.

[Conventional technology]

Conventionally, this type of distributed communication system does not have a means to monitor file access from external devices and process that information, nor a means to automatically move files to external devices; The system administrator collected information from users or communication monitors, made the decision to move the file, and then moved the file.

[Problem to be solved by the invention]

The conventional distributed communication system described above does not automatically move files, and has the disadvantage that if access and traffic on the network change significantly, the load may be applied to only some networks.

In addition, when moving files to improve network efficiency, the system administrator collects information from users or communication monitors, etc., and makes the decision to move the file. However, it has the disadvantage that it takes a lot of time to improve efficiency. Furthermore, the above-mentioned high load state on the network has the disadvantage that it is only noticeable when a user reports a decrease in response or the like or when a device on the network operates abnormally due to the high load.

SUMMARY OF THE INVENTION An object of the present invention is to provide a distributed communication system that can automatically move files to frequently accessed devices and improve system efficiency by eliminating the above drawbacks.

[Means to solve the problem]

In the present invention, a plurality of devices having computers are connected by coaxial cables or lines to form the same network, and each device is provided with a means for mutually accessing files held by each device and a means for transferring files. In the distributed communication system, each device includes an access information storage means for recognizing a device that has accessed a file in the device itself and storing the number of accesses for each file and for each accessing device, and an access information storage means for storing this stored data. system efficiency determining means for determining whether it is more effective for system efficiency for the file to exist in another device than in the own device; The present invention is characterized by comprising a file transfer control means that performs transfer processing of the file to the other device when the determination is made.

Further, in the present invention, the system efficiency determining means includes means for calculating an access ratio of the number of accesses for each device to the total number of times that all files in the own device are accessed; 7' Compare the access ratio with a preset threshold, and if the access ratio of the own device is smaller than the threshold, calculate the access ratio for each device for the file, and select the device with the highest access ratio. The device may include means for determining that file transfer is valid if the device is not the device itself.

Further, in the present invention, the system efficiency determining means includes means for calculating an access ratio of the number of accesses for each device to the total number of times that all files in the own device are accessed; Compare the access ratio with a preset threshold, and if the access ratio of the own device is smaller than the threshold, the reciprocal of the transfer time of the file between the device and the own device corresponding to the access ratio of each device. The method may include means for calculating an access coefficient multiplied by , and determining that file transfer is valid if the device with the largest access coefficient is not the own device.

[Effect]

The access information storage means monitors access from each device including the own device for each file with respect to all files in the own device, and stores the data.

Based on this stored data, the system efficiency judgment means calculates the access ratio of each device for each file by a predetermined procedure, or the access coefficient obtained by multiplying this access ratio by the reciprocal of the file transfer time, and sets the value in advance. Referring to the threshold value, it is determined whether it is more effective to move the file to another device than to the own device. The file transfer means transfers the file that is determined to be valid.

Therefore, files within the device are automatically transferred from devices that are accessed less frequently to devices that are accessed more frequently, making it possible to reduce the load on the network and improve system efficiency.

〔Example〕

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

FIG. 1 is a block diagram showing a device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a distributed communication system according to an embodiment of the present invention.

According to FIG. 2, in the distributed communication system of this embodiment, devices la, lb and 1c including computers having communication means are connected to a synchronization cable 2a via a transceiver 5 for synchronization, and a device 1d is connected to a synchronization cable 2a through a transceiver 5. 5 to the coaxial cable 2a and the line 4b.
The device 1e is connected to the coaxial cable 2b via the transceiver 5, and the device 1[ is connected to the coaxial cable 2b via the transceiver 5.

Further, repeaters 3 are connected to coaxial cables 2a and 2c via transceivers 5, respectively, and devices 1g and 1h are connected to coaxial cables 2c via transceivers 5, respectively.

According to FIG. 1, the device 1 of this embodiment includes a coaxial cable 2
a coaxial cable interface 9 connected to the transceiver 5, a line interface 10 connected to the line 4, a system bus 11 that connects the coaxial cable interface 9 and the line interface 10, and various parts in the device. A main storage unit 12, a file access information storage unit 13 that recognizes each device that has accessed a file within the device and stores the data, and a main storage unit 12 connected to the system bus 11, and a file access information storage unit 13 that processes the stored data. an access information processing unit 14; a threshold storage unit 15 that stores a preset access ratio threshold;
A comparison unit 16 compares the access ratio value of the file calculated by the access information processing unit 14 with the threshold value stored in the threshold storage unit and performs predetermined processing, and transfers the file based on the result of the comparison unit 16. It includes a file transfer control section 17 that performs control and a timer 18 that starts the device.

The feature of the present invention is that in FIG. 1, the device 1 stores file access information as an access information storage means that recognizes the device that accessed the file in the device itself and stores the number of accesses for each file and each device that accessed the file. A storage unit 13 and a system efficiency determining means for determining whether it is more effective for system efficiency to have a file exist in another device than in the own device based on the stored data.
The access information processing section 14, the threshold storage section 15, and the comparison section 16, if it is determined that it is more effective in terms of system efficiency for the file to exist in another device than in the own device, to transfer the file to the other device. The present invention is provided with a file transfer control unit 17 as a file transfer control means for performing transfer processing.

Next, the operation of this embodiment will be explained.

When another device accesses a file in its own device 1 via the coaxial cable 2, coaxial cable transceiver 5, coaxial cable interface 9, line 4, or line interface 10, the device accesses the file in its own device. The device that accessed the file access information storage unit 13
The access information processing unit 14 processes the data and determines whether it is more effective for system efficiency to exist the target file in an external device than in the own device, based on the data stored in the threshold storage unit 15. and comparison section 16
The timer 18 executes the process. In addition, the file transfer control unit 17 executes file movement to the target device on the network, reduces file access from external devices, and further reduces low-speed peaks and communication via lines from the network. reduce the load on

FIG. 3 is a flowchart showing the processing procedure of the first operation of this embodiment.

First, the following process is activated by the timer 18 (step Sl). The data for each file in the own device and the number of accesses for each device is read from the file access information storage unit 13 (step S2), and the access ratio between the total number of accesses and the number of accesses of the own device is calculated for each file. is calculated (step S3). The access ratio of the own device is compared with the ratio stored in the threshold storage unit 15, and if the former is smaller than the latter, the following processing is performed (step 34).

First, the access ratio of the relevant file for each device is calculated, and the device with the largest value is searched for (step S5). Then, if the device with the highest access ratio is not the own device (step S6), the access information processing unit 1
4 makes a transmission request to the file transfer control unit 17. The file transfer control unit 17 checks whether the file can be transferred to the device, and if possible, moves the file,
All devices on the system are notified that the file has been moved (step S7). Then, after repeating the above-described process for all files, the entire process ends (step S8).

FIG. 4 is a flowchart showing the processing procedure of the second operation of this embodiment.

Similarly to Figure 3 above, for each file in the own device,
The access ratio between the total number of accesses and the number of accesses of the device itself is calculated (steps Sll to 513). The access ratio of the own device is compared with the ratio stored in the threshold storage unit 15, and if the former is smaller than the latter, the following processing is performed (step 514).

First, the access ratio of the file is calculated for each device, multiplied by the reciprocal of the transfer time between each corresponding device and the own device, and this is used as an access coefficient (step 515). The device with the largest access coefficient is searched for (step 516). If the device with the largest access coefficient is not the device itself (step 517), the access information processing section 14 issues a transmission request to the file transfer control section 17. The file transfer control unit 17 checks whether the file can be transferred to the device, moves the file if possible, and notifies all devices on the system that the file has been moved (step 818). Then, the above-mentioned process is repeated for all files, and then the entire process ends (step 519).

According to this second operation procedure, the transfer time is taken into consideration when determining whether or not to move the file, so that the load on the network can be further reduced.

〔Effect of the invention〕

As explained above, according to the present invention, there is provided means for monitoring access to files within the device from an external device, processing the information, and means for automatically moving files from the device to the external device. This eliminates the need for the system administrator to collect the above information, decide whether to move the file, and move the file.Furthermore, files can be automatically moved to frequently accessed devices, allowing efficient communication. In addition, it eliminates the need for manual intervention to move erroneous files, and when the load on the network increases abnormally within a short period of time, it automatically and quickly reduces the load on the network, increasing system efficiency. The effect is significant.

Value storage unit, 16... Comparison unit, 17... File transfer control unit, 1B... Timer, S1-38, Sll-5
19...Step.

Claims (1)

[Claims] 1. A plurality of devices having computers are connected by coaxial cables or lines to form the same network, and each device has a means for mutually accessing files held by each device and a means for transferring files. In a distributed communication system, each of the devices includes: access information storage means for recognizing a device that has accessed a file in the device itself and storing the number of accesses for each file and for each accessing device; system efficiency determining means for determining whether it is more effective for system efficiency for the file to exist in another device than in the own device based on the data; A distributed communication system characterized by comprising: a file transfer control means that performs a process of transferring the file to the other device when it is determined that it is effective in terms of efficiency. 2. The system efficiency determining means calculates an access ratio of the number of accesses for each device to the total number of times that all files in the own device are accessed;
Compare the calculated access ratio of the own device with a preset threshold, and if the access ratio of the own device is smaller than the threshold, calculate the access ratio for each device for the file and select the highest access ratio. 2. The distributed communication system according to claim 1, further comprising means for determining that file transfer is valid when the device having the ratio is not the own device. 3. The system efficiency determining means calculates an access ratio of the number of accesses for each device to the total number of times that all files in the own device are accessed;
Compare the calculated access ratio of the own device with a preset threshold, and if the access ratio of the own device is smaller than the threshold, the connection between the device and the own device corresponding to the access ratio of each device is determined. 2. The distributed communication system according to claim 1, further comprising means for calculating an access coefficient multiplied by a reciprocal of a file transfer time, and determining that file transfer is valid if the device with the largest access coefficient is not the own device.