JP2004147343A - Information transfer apparatus, information transfer method and computer readable recording medium with information transfer program recorded thereon - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To transfer information in a short time in a high load state and to transfer information with high quality in a low load state. <P>SOLUTION: A communication load measuring means 21 measures the communication load of a computer network 13 and stores the measurement result in a communication load database 22 as communication load information. When an information search client requests information, a communication load calculating means 23 extracts communication load information in the past closest to the point in time of the information request from the communication load database 22 and calculates a transferable information quantity in accordance with the communication load information. When information scheduled to be transferred is greater than the transferrable information quantity, a transfer information creating means 12b creates transfer information by reducing an information quantity corresponding to the communication load from the information scheduled to be transferred. When the information scheduled to be transferred is smaller than the transferrable information quantity, the transfer information creating means 12b creates the transfer information by adding an information quantity corresponding to the communication load to the information scheduled to be transferred. <P>COPYRIGHT: (C)2004,JPO

Description

  The present invention relates to an information transfer apparatus and an information transfer method for transferring information between computers connected to each other using a communication medium.

  A conventional information transfer device will be described with reference to the drawings.

  FIG. 33 is a system configuration diagram of a conventional information transfer device. As shown in FIG. 33, a conventional information transfer apparatus includes an information storage server 102 which is a server computer which stores information and provides information to the information search client 101 from an information search client 101 which is a client computer which requests information. In response to a request for information retrieval, the information storage server 102 extracts the transfer information from the database 102a according to the instruction of the information transfer means 103, and transfers the information to the information retrieval client 101 via the computer network 104.

  The conventional information transfer apparatus configured as described above transfers information without considering the loads on the computer network 104, the information search client 101, and the information storage server 102 at all.

  However, since the conventional information transfer apparatus performs information transfer without considering each load of the computer network 104, the information search client 101, or the information storage server 102, especially in the case of a high load state, especially the image information However, there is a problem that the information cannot be transferred when transferring an information having a very large information amount, or that the transfer of the information takes an extremely long time.

  The present invention has been made in view of the above-described circumstances, and has been made to be able to transfer information in a short time in a high load state and to transfer high-quality information in a low load state. The purpose is to do.

  A first information transfer apparatus according to the present invention is an information transfer means in which a plurality of computers connected to each other using a communication medium transfer information and increase or decrease the amount of information to be transferred in accordance with a load. It has.

  According to the first information transfer apparatus, since the information transfer means for increasing / decreasing the amount of information to be transferred according to the magnitude of the load is provided, the amount of information to be transferred is reduced when the load is high. As a result, the transfer time can be reduced, and in a low load state, information corresponding to the load can be added to the information to be transferred.

  A second information transfer device according to the present invention reduces a communication load of a communication medium in a computer network including a server computer that stores and provides information and a client computer that requests information, which are connected to each other using a communication medium. A communication load measuring means for measuring, a communication load calculating means for calculating a magnitude of the communication load, and, if the calculated communication load is larger than a predetermined load, the transfer load information from the scheduled transfer information to the communication load. When the calculated communication load is smaller than a predetermined load, transfer information is created by adding the information amount to the transfer schedule information according to the communication load. The information processing device includes an information creating unit and an information transfer unit that transfers the transfer information created by the transfer information creating unit to the client computer that has requested the information.

  According to the second information transfer apparatus, the communication load of the communication medium is always measured, and if the calculated communication load is larger than a predetermined load, the information amount corresponding to the communication load is reduced from the transfer schedule information. When the calculated communication load is smaller than a predetermined load, the transfer information is created by adding an information amount according to the communication load to the transfer schedule information, and the transfer information created in the client computer is created. In a high-load state, the amount of information to be transferred can be reduced to reduce the transfer time, and in a low-load state, the information to be transferred can be adjusted according to the load. Information can be added.

  In the second information transfer device, it is preferable that the communication load measuring unit measures the communication load using at least one of the number of packets flowing through the communication medium, the size of the packets, the number of collisions, and the line usage rate. .

  A third information transfer device according to the present invention is a system of a server or a client computer in a computer network including a server computer that stores and provides information and a client computer that requests information, connected to each other using a communication medium. System load measuring means for measuring the load, system load calculating means for calculating the magnitude of the system load, and, if the calculated system load is larger than a predetermined load, the system from the transfer schedule information to be transferred Transfer information is created by reducing the amount of information according to the load, and if the calculated system load is smaller than the predetermined load, the transfer information is created by adding the amount of information to the transfer schedule information according to the system load Transfer information creating means for transferring information to a client computer which has requested the information And an information transfer means for transferring the transfer information created.

  According to the third information transfer apparatus, the system load of the server or the client computer is always measured, and if the calculated system load is larger than a predetermined load, the information amount according to the communication load is calculated from the transfer schedule information. When the calculated system load is smaller than a predetermined load, transfer information is created by adding the amount of information according to the system load to the transfer schedule information, and the transfer information is created in the client computer. Since the transfer information is transferred, the amount of information to be transferred can be reduced in a high-load state to shorten the transfer time. Appropriate information can be added.

  In the third information transfer apparatus, the system load measuring means calculates the system load by using a computer CPU usage rate, a disk I / O count, a page in / out count, a swap in / out count, a process count, a CPU cache hit rate, The measurement is preferably performed using at least one of the hit rate of the disk cache and the data transfer amount of the system bus.

  A fourth information transfer device according to the present invention is configured such that, in a computer network including a server computer that stores and provides information and a client computer that requests information, the communication load of the communication medium, A load measuring means for measuring at least one of the system load of the server computer or the system load of the client computer, receiving a request for information transfer from the client computer, and making a transfer reservation using the requested information as transfer reservation information The transferable information amount is calculated from the load measured by the information transfer reservation unit and the load measurement unit, and when the transferable information amount is larger than the transfer reservation information amount, the transfer start of the transfer reservation information is instructed. Load calculation means and client computer by transfer start instruction And an information transfer means for transferring the transfer reservation information.

  According to the fourth information transfer apparatus, at least one of the communication load of the communication medium, the system load of the server computer, and the system load of the client computer is always measured, and the information transfer request is received from the client computer. The received information is reserved as transfer reservation information, and the amount of transferable information is calculated from the measured load. If the amount of transferable information is larger than the amount of transfer reservation information, the transfer of transfer reservation information is performed. In order to instruct the start, the requested information is transferred to the client computer after a low load.

  A fifth information transfer device according to the present invention is a client computer in a server computer, which is connected to each other using a communication medium and includes a server computer that stores and provides information and a client computer that requests information. A difference information creating unit for creating difference information for adding an information amount to information transferred to the server, and measuring at least one of a communication load of a communication medium, a system load of a server computer, or a system load of a client computer. Load measuring means and load calculating means for calculating a transferable information amount from the load measured by the load measuring means, and instructing to start transfer of the difference information when the transferable information amount is larger than the information amount of the difference information. To the client computer according to the transfer start instruction And the difference information transfer means for transferring the minute information, and a differential information adding means for adding the difference information to the transferred information on the client computer.

  According to the fifth information transfer device, at least one of the communication load of the communication medium, the system load of the server computer, and the system load of the client computer is always measured, and the server computer has already transferred the data to the client computer. In addition to creating difference information for adding the information amount to the information of the above, calculating the transferable information amount from the measured load, and starting the transfer of the difference information when the transferable information amount is larger than the difference information amount Therefore, the difference information, which is the untransferred information among the requested information, is transferred to the client computer after the low load time.

  A sixth information transfer apparatus according to the present invention is the same as a plurality of server computers in a computer network including a server computer that stores and provides information and a client computer that requests information, connected to each other using a communication medium. Information accumulation means for accumulating information of the contents of the information, load measurement means for measuring each communication load of the communication medium between the client computer requesting the information and the plurality of server computers or at least each system load of the plurality of server computers, Load calculating means for instructing the server computer having a small load among the server computers to transfer information, and information transferring means for transferring information to the client computer in accordance with the transfer start instruction.

  According to the sixth information transfer apparatus, information of the same content is stored in a plurality of server computers, and each communication load of a communication medium between a client computer and a plurality of server computers or each system load of at least a plurality of server computers is reduced. Always measure and transfer the information from the low-load server computer to the client computer to instruct the low-load server computer of the multiple server computers to start transferring information. become.

  In the fourth to sixth information transfer devices, the load measuring means measures the communication load using at least one of the number of packets flowing through the communication medium, the size of the packets, the number of collisions, and the line usage rate. , The system load, the CPU usage rate of the computer, the number of disk I / Os, the number of page-in / out times, the number of swap-in / out times, the number of processes, the hit rate of the CPU cache, the hit rate of the disk cache, and the data transfer amount of the system bus. It is preferable to measure using at least one of them.

According to a first information transfer method according to the present invention, when a plurality of computers connected to each other using a communication medium transfer information, the amount of information to be transferred is increased or decreased according to the magnitude of a load. It has a transfer step.

  According to the first information transfer method, the information transfer step of increasing / decreasing the amount of information to be transferred according to the size of the load is provided. Therefore, the amount of information to be transferred is reduced in a high load state. As a result, the transfer time can be reduced, and in a low load state, information corresponding to the load can be added to the information to be transferred.

  A second information transfer method according to the present invention reduces a communication load of a communication medium in a computer network including a server computer that stores and provides information and a client computer that requests information, which are connected to each other using a communication medium. A communication load measuring step for measuring, a communication load calculating step for calculating the magnitude of the communication load, and, if the calculated communication load is larger than a predetermined load, the communication load is changed from the transfer schedule information scheduled to be transferred. When the calculated communication load is smaller than a predetermined load, transfer information is created by adding the information amount to the transfer schedule information according to the communication load. An information creation step, and an information transfer step of transferring the transfer information created in the transfer information creation step to a client computer that has requested the information. That.

  According to the second information transfer method, the communication load of the communication medium is always measured, and if the calculated communication load is larger than a predetermined load, the information amount corresponding to the communication load is reduced from the transfer schedule information. When the calculated communication load is smaller than a predetermined load, the transfer information is created by adding an information amount according to the communication load to the transfer schedule information, and the transfer information created in the client computer is created. In a high-load state, the amount of information to be transferred can be reduced to reduce the transfer time, and in a low-load state, the information to be transferred can be adjusted according to the load. Information can be added.

  In the second information transfer method, the communication load measuring step includes a step of measuring the communication load using at least one of the number of packets flowing through the communication medium, the packet size, the number of collisions, and the line usage rate. Is preferred.

  A third information transfer method according to the present invention is an information transfer method in a computer network which is connected to each other using a communication medium and comprises a server computer for storing and providing information and a client computer for requesting information. A system load measuring step of measuring the system load of the client computer; a system load calculating step of calculating the magnitude of the system load; and a transfer scheduled to be transferred when the calculated system load is larger than a predetermined load. The transfer information is created by reducing the amount of information from the schedule information according to the system load, and if the calculated system load is smaller than a predetermined load, the information amount is added to the transfer schedule information according to the system load. A transfer information creation step of creating transfer information, and a client computer that has requested the information; And an information transfer step of transferring the transfer information created in the transfer information creation process.

  According to the third information transfer method, the system load of the server or the client computer is always measured, and when the calculated system load is larger than a predetermined load, the information amount according to the communication load is calculated from the transfer schedule information. When the calculated system load is smaller than a predetermined load, transfer information is created by adding the amount of information according to the system load to the transfer schedule information, and the transfer information is created in the client computer. Since the transfer information is transferred, the amount of information to be transferred can be reduced in a high-load state to shorten the transfer time. Appropriate information can be added.

  In the third information transfer method, the system load measuring step includes the steps of: measuring a system load, a CPU usage rate of a computer, a disk I / O count, a page in / out count, a swap in / out count, a process count, a CPU cache hit rate, It is preferable to include a step of measuring using at least one of a hit rate of the disk cache and a data transfer amount of the system bus.

A fourth information transfer method according to the present invention provides a computer network comprising a server computer for storing and providing information and a client computer for requesting information, the communication load of the communication medium, A load measuring step of measuring at least one of the system load of the server computer or the system load of the client computer; receiving an information transfer request from the client computer; and performing transfer reservation using the requested information as transfer reservation information. The amount of transferable information is calculated from the load measured in the information transfer reservation step and the load measurement step, and when the amount of transferable information is larger than the amount of transfer reservation information, the transfer start of the transfer reservation information is instructed. Load calculation process and transfer start instruction And an information transfer step of transferring the transfer reservation information to the data.

  According to the fourth information transfer method, at least one of a communication load of a communication medium, a system load of a server computer, and a system load of a client computer is always measured, and a request for information transfer is received from a client computer. The received information is reserved as transfer reservation information, and the amount of transferable information is calculated from the measured load. If the amount of transferable information is larger than the amount of transfer reservation information, the transfer of transfer reservation information is performed. In order to instruct the start, the requested information is transferred to the client computer after a low load.

In a fifth information transfer method according to the present invention, a client computer in a server computer in a computer network including a server computer that stores and provides information and a client computer that requests information is connected to each other using a communication medium. A difference information creating step of creating difference information for adding an amount of information to information transferred to the server, and measuring at least one of a communication load of a communication medium, a system load of a server computer, or a system load of a client computer. A load measuring step, and a load calculating step of calculating a transferable information amount from the load measured in the load measuring step, and instructing a start of transfer of the difference information when the transferable information amount is larger than the information amount of the difference information. And the transfer start instruction It comprises a difference information transfer step of transferring the differential information, the forwarded information of the client computer and the difference information adding step of adding the difference information to.

  According to the fifth information transfer method, at least one of the communication load of the communication medium, the system load of the server computer, and the system load of the client computer is always measured, and the server computer has transferred the data to the client computer. In addition to creating difference information for adding the information amount to the information of the above, calculating the transferable information amount from the measured load, and starting the transfer of the difference information when the transferable information amount is larger than the difference information amount Therefore, the difference information, which is the untransferred information among the requested information, is transferred to the client computer after the low load time.

  In a sixth information transfer method according to the present invention, a plurality of server computers are connected to each other using a communication medium, and are connected to a plurality of server computers in a computer network including a server computer that stores and provides information and a client computer that requests information. An information accumulation step of accumulating information of the content of the information, a load measurement step of measuring each communication load of a communication medium between the client computer requesting the information and the plurality of server computers or each system load of at least the plurality of server computers, A load calculation step of instructing a server computer having a small load among the server computers to transfer information, and an information transfer step of transferring information to a client computer in accordance with the transfer start instruction.

  According to the sixth information transfer method, information of the same content is stored in a plurality of server computers, and each communication load of a communication medium between a client computer and a plurality of server computers or each system load of at least a plurality of server computers is reduced. Always measure and transfer the information from the low-load server computer to the client computer to instruct the low-load server computer of the multiple server computers to start transferring information. become.

  In the fourth to sixth information transfer methods, the load measuring step measures the communication load by using at least one of the number of packets flowing through the communication medium, the packet size, the number of collisions, and the line usage rate. , The system load, the CPU usage rate of the computer, the number of disk I / Os, the number of page-in / out times, the number of swap-in / out times, the number of processes, the hit rate of the CPU cache, the hit rate of the disk cache, and the data transfer amount of the system bus. It is preferable to include a step of measuring using at least one of them.

  A computer-readable recording medium storing the first information transfer program according to the present invention is connected to each other using a communication medium, and includes a computer network including a server computer for storing and providing information and a client computer for requesting information. The information transfer program in the work is recorded, and the computer is used to measure the communication load of the communication medium, the communication load measuring means, the communication load calculating means for calculating the magnitude of the communication load, and when the calculated communication load is larger than a predetermined load. The transfer information is created by reducing the amount of information according to the communication load from the transfer schedule information that is scheduled to be transferred, and if the calculated communication load is smaller than a predetermined load, the communication information is added to the transfer schedule information. Transfer information creating means for creating transfer information by adding an information amount according to the load, and a client requesting the information To function as an information transfer means for transferring the transfer information created in the transfer information creating means to the computer.

  In a computer-readable recording medium on which the first information transfer program is recorded, the communication load measuring means determines the communication load by at least one of the number of packets flowing through the communication medium, the packet size, the number of collisions, and the line usage rate. It is preferable to use one for measurement.

  A computer-readable recording medium recording the second information transfer program according to the present invention is connected to each other using a communication medium, and includes a computer network including a server computer for storing and providing information and a client computer for requesting information. The information transfer program in the work is recorded, and the computer is used to measure the system load of the server or the client computer, the system load measuring means, the system load calculating means for calculating the magnitude of the system load, and the calculated system load is higher than a predetermined load. If it is larger, transfer information is created by reducing the amount of information according to the system load from the transfer schedule information to be transferred, and if the calculated system load is smaller than a predetermined load, the transfer schedule information To the transfer information by adding the amount of information to the Transfer information generation means for generating and forwarding information created in the transfer information generating means to the client computer that requested the information to function as an information transfer means for transferring.

  In a computer-readable recording medium on which the second information transfer program is recorded, the system load measuring means measures the system load by using a computer CPU usage rate, a disk I / O count, a page-in / out count, a swap-in / out count, The measurement is preferably performed using at least one of the number of processes, the hit ratio of the CPU cache, the hit ratio of the Disk cache, and the data transfer amount of the system bus.

  A computer-readable recording medium recording the third information transfer program according to the present invention is connected to each other using a communication medium, and comprises a computer network including a server computer for storing and providing information and a client computer for requesting information. The information transfer program in the work is recorded, the computer is used to measure at least one of a communication load of a communication medium, a system load of a server computer, or a system load of a client computer. The information transfer reservation means for making a transfer reservation using the information received and requested as the transfer reservation information, calculates the amount of transferable information from the load measured by the load measuring means, and determines the amount of transferable information of the transfer reservation information. If the amount of information is greater than Load calculating means for instructing the start of transfer of the reservation information, and to function as an information transfer means for transferring the transfer reservation information to the client computer by an instruction of the start transfer.

  A computer-readable recording medium storing the fourth information transfer program according to the present invention is connected to each other using a communication medium, and includes a computer network including a server computer for storing and providing information and a client computer for requesting information. Recording the information transfer program in the work, the computer, the server computer, the difference information creating means for creating the difference information to add the information amount to the information transferred to the client computer, the communication load of the communication medium, the server computer Load measuring means for measuring at least one of the system load or the system load of the client computer; calculating the amount of information transferable from the load measured by the load measuring means; Greater than Function as load calculation means for instructing the start of transfer of minute information, difference information transfer means for transferring difference information to the client computer in accordance with the transfer start instruction, and difference information addition means for adding difference information to the transferred information of the client computer Let it.

  A computer-readable recording medium storing the fifth information transfer program according to the present invention is connected to each other using a communication medium, and includes a computer network including a server computer for storing and providing information and a client computer for requesting information. The information transfer program in the work is recorded, and the computer is provided with information storage means for storing information of the same content in a plurality of server computers, each communication load of a communication medium between the client computer requesting the information and the plurality of server computers or at least. Load measuring means for measuring the system load of each of the plurality of server computers; load calculating means for instructing the server computer having a smaller load among the plurality of server computers to start transferring information; and To function as an information transfer means for transferring the broadcast.

  In a computer-readable recording medium on which the third to fifth information transfer programs are recorded, the load measuring means determines the communication load as the number of packets flowing through the communication medium, the size of the packets, the number of collisions, or the line usage rate. The system load is measured using at least one of them, and the system load is measured by using the CPU of the computer, the number of disk I / Os, the number of pages in and out, the number of swaps in and out, the number of processes, the hit rate of the CPU cache, and the hit of the disk cache. The measurement is preferably performed using at least one of the rate and the data transfer amount of the system bus.

  According to the first information transfer device of the present invention or the first information transfer method of the present invention, when the network system is under a heavy load, the amount of information to be transferred is reduced to reduce the transfer time. Therefore, necessary information can be obtained without generating a waiting time. In addition, in a low load state, since information according to the load can be added to the information to be transferred, information for improving the quality of the information can be added.

  According to the second information transfer device of the present invention or the second information transfer method of the present invention, when the communication load of the communication medium is high, the amount of information to be transferred is reduced and the transfer is performed. Since the time can be reduced, necessary information can be obtained without causing a waiting time. In addition, in a low load state, since information according to the load can be added to the information to be transferred, information for improving the quality of the information can be added.

  In the second information transfer device or the second information transfer method, when at least one of the number of packets flowing through the communication medium, the packet size, the number of collisions, and the line usage rate is used for measuring the communication load, Can measure the communication load.

  According to the third information transfer apparatus or the third information transfer method of the present invention, when the system load of the computer is high, the amount of information to be transferred is reduced and the transfer time is reduced. Required information can be obtained without generating a waiting time. In addition, in a low load state, since information according to the load can be added to the information to be transferred, information for improving the quality of the information can be added.

  In the third information transfer apparatus or the third information transfer method, the CPU load of the computer, the number of disk I / Os, the number of pages in / out, the number of swaps in / out, the number of processes, the number of processes, When at least one of the hit ratio, the hit ratio of the disk cache, and the data transfer amount of the system bus is used, the system load can be reliably measured.

  According to the fourth information transfer apparatus of the present invention or the fourth information transfer method of the present invention, the requested information is transferred to the client computer after a low load, so that all the information desired by the client computer Can be transferred reliably.

According to the fifth information transfer apparatus of the present invention or the fifth information transfer method of the present invention, difference information that is untransferred information of the requested information is transferred to the client computer after waiting for a low load. Therefore, the difference information can be added to the information transferred earlier, so that the quality of the information transferred earlier can be improved.

  According to the sixth information transfer device of the present invention or the sixth information transfer method of the present invention, information is transferred from a low-load server computer of the plurality of server computers to the client computer. Desired information can be transferred with almost no waiting time.

  According to the fourth to sixth information transfer apparatuses or the fourth to sixth information transfer methods, at least one of the number of packets flowing through the communication medium, the size of the packets, the number of collisions, and the line usage rate is used for measuring the communication load. In addition to using one of them, the CPU load of the computer, the number of disk I / Os, the number of pages in / out, the number of swaps in / out, the number of processes, the hit rate of the CPU cache, the hit rate of the disk cache, When at least one of the data transfer amounts of the system bus is used, the communication load or the system load can be reliably measured.

According to a computer-readable recording medium on which an information transfer program for causing a computer to implement any one of the information transfer methods according to the present invention is provided, the information transfer program is executed by a computer connected to a network. The same effect as that of any one of the information transfer methods can be obtained.

The information assumed by the information transfer device according to the present invention is a still image, a moving image, audio information, and the like, and if stored on a computer, has a huge amount, for example, a data amount of at least several Mbytes or more. Therefore, when transferring such information to a computer connected via a computer network, a data amount of several Mbytes or more is transferred, and a great load is imposed on the computer that performs transmission and reception and the computer network that is a transfer path. For this reason, the information cannot be transferred or the transfer takes much time. In addition, this has a great effect not only on the server computer and the client computer but also on other resources, and there are cases where other computers that transmit and receive and other jobs using the computer network cannot be completed.
(1st Embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

  In the present embodiment, when a client computer requests a server computer to transfer information, a communication load of a computer network as a communication medium serving as a transfer path is calculated using load information stored in advance, and the load is calculated. , Transfer information that can be transferred is newly created and transferred within a short time (time desired by the client).

  For example, when the communication load is large, if the information is still image information, the number of pixels and the number of colors for expressing the information are reduced.If the information is moving image information, the time component is reduced. Transfer information in which the amount of information is reduced by reduction or the like is newly created and transferred within a desired time. When the communication load is small, addition of the number of pixels and the number of colors for expressing information is added if the information is still image information, and a time component is added if the information is moving image information, or a high frequency component is added if the information is audio information. Transfer information with an increased amount of information is newly created by addition or the like, and information with improved quality is transferred.

  FIG. 1 is a system configuration diagram of the information transfer device according to the first embodiment of the present invention. As shown in FIG. 1, an information search client 11, which is a client computer that issues an information search request, and an information storage server 12, which is a server computer that stores information and provides the information, are a LAN (local area network) as a communication medium. ) Are connected via a computer network 13.

  The information transfer device is connected to a computer network 13, and a communication load measuring unit 21 that constantly measures a communication load of the computer network 13, stores a measurement result in a communication load database 22 as communication load information, and an information search client 11. When requesting a search request to the information storage server 12, a communication load calculation that extracts the past communication load information closest to that time from the communication load database 22 and calculates the amount of transferable information according to the communication load information. When the transfer schedule information extracted from the transfer schedule database 12a is larger than the transferable information amount, the transfer information is created by reducing the information amount according to the communication load from the transfer schedule information. When the transfer schedule information is stored in the transfer information database 12c and the transfer schedule information is smaller than the transferable information amount, Transfer information creating means 12b for creating transfer information by adding an amount of information to the transfer schedule information according to the communication load, and then storing the information in the transfer information database 12c, and transferring the information from the transfer information database 12c of the information storage server 12. An information transfer unit 24 that extracts information and transfers the transfer information to the information search client 11 is provided.

  Hereinafter, an information transfer method of the information transfer apparatus configured as described above will be described with reference to the drawings.

  First, as shown in the flow of the communication load measuring step in FIG. 2, the communication load measuring means 21 shown in FIG. 1 calculates the number of packets flowing on the computer network 13 for a certain period (for example, one second) every minute and the number of packets. The size is measured, the packet amount (packet amount = number of packets × size) is calculated, and is registered together with the measurement time in the item indicating the packet amount in the communication load information table 22a shown in FIG. . Further, for example, the number of collisions occurring on the computer network 13 for a certain period of time (for example, one minute) is measured every minute and registered in the term indicating the number of collisions in the communication load information table 22a together with the measurement time. In addition, a load coefficient (for example, load coefficient = packet amount + collision number) is calculated from the packet amount and the collision number measured at the same time, and registered in the term representing the load coefficient at the corresponding time in the communication load information table 22a. I do.

  The number of packets, the size thereof, and the number of collisions may be measured using an existing network monitoring tool or the like, and there is no particular limitation. The measurement interval and the measurement period of the packet amount and the number of collisions are not particularly limited.

  When calculating the load coefficient, weighting may be performed for each item and then added. For example, a method of weighting either the amount of packets or the number of collisions according to the state of communication, or reducing the weight as going back to the past is conceivable. Further, the line usage rate may be measured and used when calculating the load coefficient.

  Next, as shown in the flow of the communication load calculation step in FIG. 4, the communication load calculation unit 23 shown in FIG. The calculation of the communication load of the computer network 13 is started.

  That is, as shown in FIG. 5, the request time is extracted from the information search request format 50, which is a message received from the information storage server 12, and the information search client 11 searches from the measurement time in the communication load information table 22a shown in FIG. A record having a past time closest to the time at which the request was made is retrieved to extract a load coefficient. Thereafter, the transferable information amount per second is extracted from the load coefficient extracted using the transferable information amount calculation curve 51 which is an index for calculating the information amount transferable per second according to the load coefficient shown in FIG. Ask for.

  The transferable information amount calculation curve 51 shown in FIG. 6 is obtained from the communication load information table 22a assuming that, for example, a reference load coefficient is a reference coefficient L0 and a transferable information amount at the reference coefficient L0 is a reference information amount I0. When the extracted load coefficient is larger than the reference coefficient L0, the transferable information amount becomes smaller than the reference information amount I0, and when the extracted load coefficient is smaller than the reference coefficient L0, the transferable information amount becomes larger than the reference information amount I0. It is set as follows. Note that the transferable information amount calculation curve 51 is desirably adapted to the network environment, and may be created by measuring the transferable information amount while changing the load in an actual environment. The creation method is not particularly limited.

  Further, when the load coefficient is extracted from the communication load information table 22a shown in FIG. 3, an average value may be calculated after weighting the load coefficient for a certain past period (for example, 10 minutes).

  Next, as shown in the flow of the transfer information creation step in FIG. 7, the transfer information creation unit 12b shown in FIG. 1 stores information based on the transferable information amount per second obtained by the communication load calculation unit 23. Transfer information is created from the transfer schedule information 12a on the server 12 and stored in the transfer information database 12c.

  That is, the time limit is extracted from the information search request format 50 shown in FIG. 5, and the transfer information amount that can be transferred within the time limit (transfer information amount = time limit × transferable information amount per second) is transferred per second. It is calculated from the possible information amount.

  If the calculated transfer information amount is smaller than the transfer information amount which is the initial information amount (the transfer information amount <the transfer information amount), the information amount of the transfer schedule information is reduced to the transfer information amount, and a new transfer is performed. Create information. When the calculated transfer information amount is equal to or larger than the transfer schedule information amount (transfer information amount> = transfer schedule information amount), additional information is added to the transfer schedule information amount until the transfer information amount is reached. Create new transfer information. Thereafter, the newly created transfer information is stored in the transfer information database 12c.

  The transfer information may be created by increasing or decreasing the number of pixels, increasing or decreasing high frequency components, increasing or decreasing color display colors, increasing or decreasing gray scale display colors, or increasing or decreasing time axis components, and is not particularly limited. When the calculated transfer information amount is equal to or larger than the transfer schedule information amount (the transfer information amount> = the transfer schedule information amount), the transfer schedule information can be used as it is without adding any new information. Good.

  Next, as shown in the flow of the information transfer step of FIG. 8, the information transfer means 24 shown in FIG. 1 extracts the transfer information from the information storage server 12 and distributes the transfer information to the information retrieval client 11.

  That is, the transfer information is extracted from the transfer information database 12c of the information storage server 12, the request source address is extracted from the information search request format 50 shown in FIG. The transfer information created by the information storage server 12 is transferred to the client 11 and stored in the storage device of the information search client 11.

  It should be noted that the transfer method may be a file transfer or the like that is usually provided, and is not particularly limited.

  As described above, according to the present embodiment, the necessary information can be searched within a desired time by reducing the amount of information when the communication load is large according to the load of the computer network 13 at the time of the search request. At the same time, when the load is small, higher quality information can be provided to the information retrieval client 11 by adding an information amount.

  The installation locations of the communication load measurement unit 21, the communication load database 22, the communication load calculation unit 23, the transfer information creation unit 12b, the transfer information database 12c, and the information transfer unit 24 are all limited to the present embodiment. Instead, it may be provided on a computer accessible through a network.

Further, a computer as an information transfer device for realizing the information transfer method according to the present embodiment includes a CPU, a main storage device, an auxiliary storage device such as a magnetic disk device or an optical disk device, an input / output device serving as a man-machine interface, Any configuration including a data line terminating device such as a modem may be used.

Therefore, if an information transfer program for realizing the information transfer method according to the present embodiment is created, and the information transfer program is recorded on a computer-readable recording medium, the recording medium can be stored in an auxiliary storage of the computer. The information transfer program according to the present embodiment is loaded into the main storage device of the computer by being loaded into the device, and when a predetermined operation timing (= event) occurs, a predetermined function of each unit is performed by the CPU of the computer. Is executed.

The computer that realizes the information transfer device according to each embodiment described below has the same configuration as the computer that realizes the information transfer device according to the present embodiment.
(Second embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.

  In this embodiment, when a client computer requests information transfer to a server computer, the system load of a computer that performs transmission and reception is calculated using load information stored in advance, and transfer can be performed according to the load. Transfer information is newly created and transferred within a short time (time desired by the client).

  For example, when the system load is large, if the image is still image information, the number of pixels and the number of colors for expressing information are reduced.If the image is moving image information, the time component is reduced. Transfer information in which the amount of information is reduced by reduction or the like is newly created and transferred within a desired time. In addition, when the system load is small, if it is still image information, addition of the number of pixels and the number of colors for expressing information is added.If it is moving image information, a time component is added.If it is audio information, high frequency component is added. Transfer information with an increased amount of information is newly created by addition or the like, and information with improved quality is transferred.

  FIG. 9 is a system configuration diagram of the information transfer device according to the second embodiment of the present invention. As shown in FIG. 9, an information search client 11, which is a client computer that issues an information search request, and an information storage server 12, which is a server computer that stores information and provides the information, include a computer network such as a LAN as a communication medium. 13 are connected.

  This information transfer device is connected to an information retrieval client 11 and an information storage server 12, constantly measures the system load of both computers 11, 12, and stores a measurement result in a system load database 26 as system load information. 25, when the information search client 11 requests the information storage server 12 to make a search request, the system load database 26 extracts the past system load information closest to that point in time, and transfers it in accordance with the system load information. The system load calculating means 27 for calculating the information amount, and when the transfer schedule information extracted from the transfer schedule database 12a is larger than the transferable information amount, the information amount is reduced from the transfer schedule information according to the system load. After creating transfer information, the transfer information is stored in the transfer information database 12c. If the transfer schedule information is smaller than the amount of information that can be transferred, the transfer information is added to the transfer schedule information according to the system load to create the transfer information, and then the transfer information is stored in the transfer information database 12c. It has means 12b and information transfer means 24 for extracting transfer information from the transfer information database 12c of the information storage server 12 and transferring the transfer information to the information retrieval client 11.

  Hereinafter, an information transfer method of the information transfer apparatus configured as described above will be described with reference to the drawings.

  First, as shown in the flow of the system load measuring step in FIG. 10, the system load measuring means 25 shown in FIG. 9 is a function of the information storage server 12 and the information search client 11 for a certain period (for example, one second) every minute. The system load is measured, and the CPU usage rate, the number of disk I / Os, and the page in / out are stored in the corresponding items of the server load information table 26a shown in FIG. 11 and the client load information table 26b shown in FIG. The number of times is registered together with the measurement time. Also, a load coefficient (for example, = CPU usage rate + Disk I / O times + Page in / out times) is calculated from the CPU usage rate, the number of Disk I / O times, and the number of page in / out times measured at the same time, and the server load information is calculated. The calculated load coefficient is registered in a term representing the load coefficient at the corresponding time in the table 26a and the client load information table 26b.

  Note that the measurement of the CPU usage rate, the number of Disk I / Os, or the number of page ins and outs may be performed using an existing system monitoring tool or the like, and the measurement method is not particularly limited. The measurement interval and the measurement period of the CPU usage rate, the number of Disk I / Os, or the number of page in / outs are not particularly limited. When calculating the load coefficient, weighting may be performed for each item and then added. For example, a method of weighting the CPU usage rate, the number of disk I / Os, or the number of page ins / outs depending on the communication state, or reducing the weight of the same item as it goes back in the past can be considered.

  Alternatively, the number of times of swap-in / out, the number of processes, the hit rate of the CPU cache, the hit rate of the disk cache, or the data transfer amount of the system bus may be measured and used when calculating the load coefficient.

  Next, as shown in the flow of the system load calculation step of FIG. 13, the system load calculation means 27 shown in FIG. The calculation of each system load of the information storage server 12 and the information search client 11 is started.

  That is, the request time is extracted from the information search request format 50, which is a message received from the information storage server 12, shown in FIG. 5, and the request time is extracted from the server load information table 26a shown in FIG. 11 and the client load information table 26b shown in FIG. From the measurement time, each record having the past time closest to the time when the information search client 11 makes the search request is searched to extract the load coefficient. Thereafter, the transferable information amount per second is extracted from the load coefficient extracted using the transferable information amount calculation curve 51 as an index for calculating the transferable information amount per second according to the load coefficient shown in FIG. Ask for.

  Note that the transferable information amount calculation curve 51 is desirably adapted to the system environment, and may be created by measuring the transferable information amount while changing the load under an actual environment. Is not particularly limited.

  Further, when extracting each load coefficient from the server load information table 26a shown in FIG. 11 and the client load information table 26b shown in FIG. 12, each item in each table 26a, 26b for a certain past period (for example, 10 minutes) is used. May be weighted before calculating the average value of the load coefficients. Further, when calculating the average value of each load coefficient of the information storage server 12 and the information search client 11, the average value may be calculated after weighting each load coefficient.

  The transfer information creation unit 12b and the information transfer unit 24 shown in FIG. 9 perform the same operations as the corresponding units in the first embodiment, and therefore the description is omitted.

  As described above, according to the present embodiment, according to the system load of the information storage server 12 and the information search client 11 at the time of a search request, if the system load is large, the amount of information is reduced to reduce the amount of information within a desired time. Necessary information can be searched, and when the load on the system is small, higher quality information can be provided to the information search client 11 by adding an information amount.

The installation locations of the system load measurement unit 25, the system load database 26, the system load calculation unit 27, the transfer information creation unit 12b, the transfer information database 12c, and the information transfer unit 24 are all limited to the present embodiment. Instead, it may be provided on a computer accessible through a network.
(Third embodiment)
Hereinafter, a third embodiment of the present invention will be described with reference to the drawings.

  This embodiment calculates the system load of the computer that performs transmission and reception and the communication load of the computer network that is the transfer path using the load information that is constantly measured and accumulated, and transfers the requested information only when the load is small. And the information is transferred when the load actually decreases.

  That is, the information is transferred when the system load or the communication load is reduced and the transfer becomes possible within a desired time.

  FIG. 14 is a system configuration diagram of the information transfer device according to the third embodiment of the present invention. As shown in FIG. 14, an information search client 11 which is a client computer for making an information search request and an information storage server 12 which is a server computer for storing information and providing the information include a computer network such as a LAN as a communication medium. 13 are connected.

  This information transfer device is connected to the computer network 13, the information retrieval client 11 and the information storage server 12, respectively, constantly measures the communication load of the computer network 13 and the system load of both computers 11, 12, and measures the load in the load database 29. Load measurement means 28 for accumulating the results as load information; and when the information search client 11 requests the information storage server 12 for a search request, the load database 29 extracts the past load information closest to that point in time. , The amount of information that can be transferred is calculated, and if the transfer reservation information extracted from the transfer reservation database 12d is larger than the amount of information that can be transferred, the transfer of information is suspended. Is smaller than the amount of information that can be transferred, Load transfer means 31 for instructing the start of transmission, and extracts transfer information requested from transfer information database 12c of information storage server 12 in response to the start instruction from load calculation means 31, and transmits the transfer information to information retrieval client 11. And information transfer means 24 for transferring.

  Hereinafter, an information transfer method of the information transfer apparatus configured as described above will be described with reference to the drawings.

  First, as shown in the flow of the load measuring step in FIG. 15, the load measuring means 28 shown in FIG. Is calculated, and the packet amount (packet amount = the number of packets × the size) is calculated, and is registered together with the measurement time in the item indicating the packet amount in the communication load information table 29a shown in FIG. Further, for example, the number of collisions occurring on the computer network 13 for a certain period of time (for example, one minute) is measured every minute and registered in the term indicating the number of collisions in the communication load information table 29a together with the measurement time. Further, a load coefficient (for example, load coefficient = packet amount + collision number) is calculated from the packet amount and the collision number measured at the same time, and registered in the term representing the load coefficient at the corresponding time in the communication load information table 29a. I do.

  The number of packets, the size thereof, and the number of collisions may be measured using an existing network monitoring tool or the like, and there is no particular limitation. The measurement interval and the measurement period of the packet amount and the number of collisions are not particularly limited.

  When calculating the load coefficient, weighting may be performed for each item and then added. For example, a method of weighting either the amount of packets or the number of collisions depending on the state of communication, or reducing the weighting as it goes back in the past can be considered. Further, the line usage rate may be measured and used when calculating the load coefficient.

  Further, the load measuring unit 28 measures the system load of the information storage server 12 and the information search client 11 for a certain period (for example, one second) every minute, and stores the server load information table shown in FIG. The CPU usage rate, the number of disk I / Os, and the number of page in / outs are registered in the corresponding items of the client load information table 29c shown in FIG. Further, a load coefficient (for example, load coefficient = CPU usage rate + Disk I / O times + page in / out times) is calculated from the CPU usage rate, the number of disk I / O times, and the number of page in / out times measured at the same time. The calculated load coefficient is registered in a term representing the load coefficient at the corresponding time in the load information table 29b and the client load information table 29c.

  Note that the measurement of the CPU usage rate, the number of Disk I / Os, or the number of page ins and outs may be performed using an existing system monitoring tool or the like, and the measurement method is not particularly limited. The measurement interval and the measurement period of the CPU usage rate, the number of Disk I / Os, or the number of page in / outs are not particularly limited. When calculating the load coefficient, weighting may be performed for each item and then added. For example, a method of weighting the CPU usage rate, the number of disk I / Os, or the number of page ins / outs depending on the communication state, or reducing the weight of the same item as it goes back in the past can be considered.

  Alternatively, the number of times of swap-in / out, the number of processes, the hit rate of the CPU cache, the hit rate of the disk cache, or the data transfer amount of the system bus may be measured and used when calculating the load coefficient.

  Next, as shown in the flow of the information transfer reservation step of FIG. 16, the information transfer reservation unit 30 shown in FIG. In the information transfer reservation table 120d shown in FIG. 17 in the reservation database 12d, a request source address which is an address of the information search client 11, an information ID for identifying information, and a time limit indicating an allowable range of transfer time are registered. . Further, the information amount of the information is detected from the information ID and registered in the corresponding information amount item of the information transfer reservation table 120d.

  Next, as shown in the flow of the load calculation step in FIG. 18, the load calculation means 31 shown in FIG. The communication load of the computer network 13 and each system load of the information storage server 12 and the information search client 11 are calculated every minute.

  That is, the number of records in the information transfer reservation table 120d shown in FIG. 17 in the transfer reservation database 12d is searched every minute, and if there are any registered records, all the records are extracted, and the information amount of the reserved information is extracted. At the same time, records having the past time closest to the current time from each measurement time in the communication load information table 29a shown in FIG. 3, the server load information table 29b shown in FIG. 11, and the client load information table 29c shown in FIG. A load coefficient is extracted by searching, and a total load coefficient is calculated by, for example, obtaining an average value. Next, the transferable information amount per second is obtained from the new load coefficient calculated using the transferable information amount per second calculation curve 51 shown in FIG. 6, and then the information transfer reservation table 120d shown in FIG. , The time limit of the corresponding information is extracted, and the transferable information amount is calculated by multiplying the transferable information amount per second by the time limit. Next, if the information amount of the transfer reserved information is smaller than the transferable information amount (transfer reserved information amount <transferable information amount), the information transfer unit 24 is instructed to start the transfer of the reserved information. Is sent, the record of the corresponding reservation information is deleted from the information transfer reservation table 120d.

  Note that the transferable information amount calculation curve 51 is desirably adapted to the network and system environment, and may be created by measuring the transferable information amount while changing the load in an actual environment, but the creation method is not particularly limited. .

  When each load coefficient is extracted from the communication load information table 29a, the server load information table 29b, and the client load information table 29c, weighting is performed for each item in each table for a certain past period (for example, 10 minutes). The average value of the load coefficient may be calculated from. Further, when calculating the average value from the three load coefficients of the communication load, the server load, and the client load, the average value may be calculated after weighting the load coefficient for each table.

  Next, as shown in the flow of the information transfer step in FIG. 19, when the information transfer unit 24 shown in FIG. 14 receives the transfer start instruction from the load calculation unit 31, the information transfer unit 24 from the transfer information database 12c of the information storage server 12 The corresponding transfer information is extracted, and the transfer information is transferred to the information retrieval client 11 through the computer network 13.

  It should be noted that the transfer method may be a file transfer or the like that is usually provided, and is not particularly limited.

  As described above, according to the present embodiment, the state of the load on the computer network 13, the server, and the client computers 12, 11 is constantly measured. Can be obtained.

  In the present embodiment, the loads of the computer network 13, the server, and the client computers 12, 11 are all measured, but any one or two of them may be measured.

Further, the installation locations of the load measurement unit 28, the load database 29, the information transfer reservation unit 30, the load calculation unit 31, the transfer reservation database 12d, and the information transfer unit 24 are all not limited to the present embodiment. What is necessary is just to provide on the computer accessible through a network.
(Fourth embodiment)
This embodiment is a system of a computer that performs transmission and reception by using load information that is constantly measured and accumulated for transferred information that has been transferred with a reduced amount of information when the system load or the communication load is high. Calculate the communication load of the computer network which is the load or the transfer path, and when the load is reduced, transfer the difference information of the created transferred information and add it to the previous information, so that the information Improve quality.

  For example, when the load becomes smaller than the average value of the past month, if the information is still image information, the number of pixels and the number of colors for expressing information are added, and if the information is moving image information, the time component is added. If the information is audio information, the difference information created for adding the high frequency component is transferred and added to the transferred information.

  FIG. 20 is a system configuration diagram of the information transfer device according to the fourth embodiment of the present invention. As shown in FIG. 20, an information search client 11, which is a client computer that issues an information search request, and an information storage server 12, which is a server computer that stores information and provides the information, include a computer network such as a LAN as a communication medium. 13 are connected.

  This information transfer device is connected to the computer network 13, the information retrieval client 11 and the information storage server 12, respectively, constantly measures the communication load of the computer network 13 and the system load of both computers 11, 12, and measures the load in the load database 29. Load measurement means 28 for accumulating the result as load information, and difference information for adding an information amount to information already transferred from the information storage server 12 to the information retrieval client 11 are created and stored in the server-side difference information database 12f. The difference information creating means 12e and the server-side difference information database 12f are searched at regular intervals, and if there is a record of difference information, the past load information closest to that point is extracted from the load database 29, and In addition to calculating the amount of information that can be transferred, If the difference information extracted from the side difference information database 12f is larger than the transferable information amount, the transfer of the difference information is suspended, and if the difference information is smaller than the transferable information amount, the difference is transferred. Load calculation means 31 for instructing the information transfer means 32 to start transferring information, and receiving the start instruction from the load calculation means 31, extracts corresponding difference information from the server-side difference information database 12f of the information storage server 12, and A difference information transfer unit 32 for transferring difference information to the search client 11 is provided. Further, the information search client 11 extracts the transferred difference information from the client-side difference information database 11c, extracts the transfer information transferred earlier from the database 11a, and adds the difference information to the transfer information. It has difference information adding means 11b.

  Hereinafter, an information transfer method of the information transfer apparatus configured as described above will be described with reference to the drawings.

  First, the load measuring means 28 shown in FIG. 20 constantly measures the communication load of the computer network 13 and the system loads of the information storage server 12 and the information search client 11. The details of the operation are the same as those of the load measuring means 28 according to the third embodiment, and a description thereof will be omitted.

  Next, as shown in the flow of the difference information creation step of FIG. 21, the difference information creation means 12e shown in FIG. 20 transmits the difference information for loading the information amount of the transfer information transferred to the information search client 11 earlier. create.

  That is, when the information load is transferred from the information storage server 12 to the information search client 11 due to the heavy communication load of the computer network 13 and the system load of the information storage server 12 or the information search client 11, the transfer information is transferred. 22. The difference information for increasing the information amount is created and stored in the server-side difference information database 12f of the information storage server 12, and the information search requesting the information is performed in each item of the difference information management table 120f shown in FIG. A request source address which is the address of the client 11, an information ID for identifying information, and a difference information ID for identifying difference information are registered.

  The difference information is not particularly limited as long as it is created so that the number of pixels, the number of high-frequency components, the number of color display colors, the number of gray scale display colors, and the number of time axis components can be increased. Although the difference information is created at the same time as the information is transferred, the difference information may be created at any time without any particular limitation.

  Next, as shown in the flow of the load calculation step in FIG. 23, the load calculation means 31 shown in FIG. 20 is configured to execute the communication load information table 29a shown in FIG. 3, the server load information table 29b shown in FIG. From each measurement time in the client load information table 29c, for example, a record having a past time closest to the current time is searched for each minute, and each load coefficient is extracted, and an average value of each load coefficient is obtained. Calculate a new load factor. The transferable information amount per second is obtained from the new load coefficient using the transferable information amount calculation curve 51 shown in FIG. Next, if the obtained transferable information amount is larger than a specific value (for example, an average value) of a past specific period (for example, one month), the difference information management table shown in FIG. The difference management information registered in 120f is extracted, and a transfer start instruction is sent to the difference information transfer means 32 so as to start transferring the difference information to the information search client 11 indicated by the request source address.

  Note that the transferable information amount calculation curve 51 is desirably adapted to the network and system environment, and may be created by measuring the transferable information amount while changing the load under an actual environment. The method for creating the curve 51 is not particularly limited.

  When extracting each load coefficient from the communication load information table 29a shown in FIG. 3, the server load information table 29b shown in FIG. 11, and the client load information table 29c shown in FIG. 12, the past in each table 29a, 29b, 29c is extracted. An average value may be calculated after weighting is performed for each load coefficient for a predetermined period (for example, 10 minutes). When calculating the average value from the three load coefficients, the average value may be calculated after weighting the load coefficient for each of the tables 29a, 29b, and 29c.

  Next, as shown in the flow of the difference information transfer step in FIG. 24, the difference information transfer means 32 shown in FIG. To deliver the difference information to

  That is, when receiving the transfer instruction of the difference information from the load calculating means 31, the corresponding difference information is extracted from the server side difference information database 12f of the information storage server 12, and the difference information is transferred to the information search client 11 through the computer network 13. I do.

  It should be noted that the transfer method may be a file transfer or the like that is usually provided, and is not particularly limited.

  Next, as shown in the flow of the difference information adding step in FIG. 25, the difference information adding means 11b shown in FIG. The difference information stored in the database 11c is extracted by using the difference information ID, and the higher quality information is created by adding the difference information to the previous transfer information.

  As described above, according to the present embodiment, when the load on the computer network 13 or any one of the information storage server 12 and the information search client 11 is light, the difference information is extracted from the information storage server 12 and the information transferred to the previously transferred information is extracted. Since the difference information is added, the quality of the information can be improved.

  In the present embodiment, the loads of the computer network 13, the server, and the client computers 12, 11 are all measured, but any one or two of them may be measured.

The installation locations of the client-side difference information database 11c, the difference information creation unit 12e, the server-side difference information database 12f, the load measurement unit 28, the load database 29, the load calculation unit 31, and the difference information transfer unit 32 It is not limited to the form, but may be provided on a computer accessible through a network.
(Fifth embodiment)
In the present embodiment, information of the same content is stored in advance in a plurality of server computers, and when there is a transfer request of information from the client computer to the server computer, the load information that is constantly measured and stored is used. The system load of a plurality of server computers capable of performing transmission or the communication load of a computer network which is a transfer path is calculated in advance, and desired information is transferred from the server computer with the smallest load to the client computer.

  FIG. 26 is a system configuration diagram of the information transfer device according to the fifth embodiment of the present invention. As shown in FIG. 26, an information retrieval client 11 which is a client computer which issues an information retrieval request and an information storage server 12 which is a server computer which accumulates information and provides the information are computer networks such as LANs as communication media. 13 are connected.

  This information transfer device includes an information storage unit 33 that stores the same transfer information in a first information storage server 2A and a second information storage server 2B, a computer network 13, a first information storage server 2A, and a second information storage server. A load measuring means 34 connected to the information storage server 2B for constantly measuring the communication load of the computer network 13 and the system load of the server computers 2A and 2B, and accumulating the measurement result in the load database 35 as load information; Polls the load database 35 in the cycle of, extracts the past load information closest to the time when the information request is received from the load database 35, calculates the amount of information that can be transferred according to the load information, Information transfer means 3 for transferring information stored in a server with a small load and a large amount of information that can be transferred. And a load calculating means 36 for instructing the start of transfer of the information, and extracting the corresponding transfer information from the database of either the first information storage server 2A or the second information storage server 2B receiving the transfer start instruction. And an information transfer means 37 for transferring the transfer information to the information retrieval client 11.

  Hereinafter, an information transfer method of the information transfer apparatus configured as described above will be described with reference to the drawings.

  First, as shown in the flow of the information storage step of FIG. 27, the information storage means 33 shown in FIG. 26 stores the same transfer information in the first information storage server 2A and the second information storage server 2B. The transfer information is not limited to being stored in two servers, but may be stored in three or more servers.

  Next, as shown in the flow of the load measuring step in FIG. 28, the load measuring means 34 shown in FIG. 26 is configured to control the communication load of the computer network 13 and each of the first information storage server 2A and the second information storage server 2B. Measure and accumulate system load respectively.

  That is, for example, the number of packets and the size of the packets for a certain period (for example, one second) flowing through the computer network 13 between the first information storage server 2A and the information search client 11 are measured every minute, and the packet amount (packet amount = The number of packets × the size) is calculated, and the calculated packet amount is registered together with the target server and the measurement time in the item representing the packet amount in the communication load information table 35a shown in FIG. Also, for example, the number of collisions occurring in the network for a certain period of time (for example, one minute) is measured every minute, and the number of collisions is registered together with the target server and the measurement time in a field representing the number of collisions in the communication load information table 35a. I do. Further, a load coefficient (for example, load coefficient = packet amount + collision number) is calculated from the packet amount and the collision number measured at the same time, and registered in the term representing the load coefficient at the corresponding time in the communication load information table 35a. I do.

  Similarly, the number of packets flowing through the computer network 13 between the second information storage server 2B and the information search client 11, the size thereof, and the number of collisions are measured, and a load coefficient is calculated. Register in the table 35a.

  The number of packets, the size thereof, and the number of collisions may be measured using an existing network monitoring tool or the like, and the measurement method is not particularly limited. The measurement interval and measurement period of the packet amount and the number of collisions are not particularly limited.

  When calculating the load coefficient, weighting may be performed for each item and then added, or the line utilization rate may be measured and used when calculating the load coefficient.

  Further, the system load of the first information storage server 2A and the second information storage server 2B for a certain period (for example, one second) is measured every minute, for example, and the server load information shown in FIG. Each CPU usage rate, each Disk I / O count and each page in / out count are registered in the corresponding item of the table 35b together with the target server and the measurement time. Thereafter, each load coefficient (for example, = CPU usage rate + Disk I / O times + Page in / out times) is calculated from the CPU usage rate, Disk I / O times, and Page in / out times measured at the same time, and the server load is calculated. It is registered in a term representing the load coefficient at the corresponding time in the information table 35b.

  Note that the measurement of the CPU usage rate, the number of disk I / Os, and the number of page in / outs may be performed using an existing system monitoring tool or the like, and the measuring method is not particularly limited. The measurement interval and the measurement period of the CPU usage rate, the number of Disk I / Os, and the number of page in / outs are not particularly limited.

  When calculating the load coefficient, weighting may be performed for each item and then added, and the number of swap-ins / outs, the number of processes, the hit ratio of the CPU cache, the hit ratio of the Disk cache, or the data transfer amount of the system bus may be measured. However, it may be used when calculating the load coefficient.

  Next, as shown in the flow of the load calculation step of FIG. 31, the load calculation means 36 shown in FIG. 26 executes the computer search when the information search client 11 requests each of the information storage servers 2A and 2B to search for information. The communication load of the network 13 and each system load of the first information storage server 2A and the second information storage server 2B are calculated.

  That is, the request time is extracted from the information search request format 50 which is the message for requesting the information search shown in FIG. 5, and the measurement time of each measurement time in the communication load information table 35a shown in FIG. 29 and the server load information table 35b shown in FIG. Among them, records having the past times closest to the time when the information search client 11 makes the search request are respectively searched to extract two load coefficients of the communication load and the server load, and a new value is obtained by calculating an average value thereof. Calculate the load coefficient. The transferable information amount per second is obtained from the newly calculated load coefficient using the transferable information amount calculation curve 51 shown in FIG. This processing is performed for each target server to determine the amount of transferable information per second for each server, and the amount of transferable information per second for each server is compared. Determines that information transfer is to be performed, and sends a transfer start instruction to the information transfer means 37.

  Note that the transferable information amount calculation curve 51 is desirably based on the network and system environment. The transferable information amount calculation curve 51 may be created by measuring the transferable information amount while changing the load under an actual environment. The method for creating the calculation curve 51 is not particularly limited.

  When extracting each load coefficient from the communication load information table 35a shown in FIG. 29 and the server load information table 35b shown in FIG. 30, the load coefficient in each of the tables 35a and 35b for a certain past period (for example, 10 minutes) is used. The average value may be calculated after weighting, and when calculating the average value from the two load coefficients, the average value may be calculated after weighting the load coefficient for each of the tables 35a and 35b. Is also good.

  Next, as shown in the flow of the information transfer process of FIG. 32, the information transfer means 37 receives the transfer start instruction from the load calculation means 36 and receives the first information storage server through the computer network 13 as shown in FIG. The transfer information is transferred from the designated server of the 2A or the second information storage server 2B to the information search client 11, and the transfer information is stored in the database of the information search client 11.

  Note that the transfer method may be a file transfer or the like that is usually provided, and is not particularly limited.

  As described above, according to the present embodiment, a plurality of information storage servers having the same information are provided, and information is provided from the information storage server with the smaller load on the computer network and the server. Information can be obtained in a time close to the time limit.

  Note that the locations of the information storage unit 33, the load measurement unit 34, the load database 35, the load calculation unit 36, and the information transfer unit 37 are not limited to those in the present embodiment, but may be set on a computer accessible through a network. It is sufficient if provided.

1 is a system configuration diagram of an information transfer device according to a first embodiment of the present invention. FIG. 4 is a flowchart illustrating a communication load measuring step of the information transfer method according to the first embodiment of the present invention. FIG. 11 is a format diagram showing a communication load information table of the information transfer method according to the first, third, and fourth embodiments of the present invention. FIG. 4 is a flowchart illustrating a communication load calculating step of the information transfer method according to the first embodiment of the present invention. It is a format diagram showing the information search request format of the information transfer method according to the first to fifth embodiments of the present invention. 6 is a graph showing a transferable information amount calculation curve per second in the information transfer method according to each of the first to fifth embodiments of the present invention. FIG. 4 is a flowchart illustrating a transfer information creating step of the information transfer method according to the first embodiment of the present invention. FIG. 4 is a flowchart illustrating an information transfer step of the information transfer method according to the first embodiment of the present invention. It is a system configuration diagram of an information transfer device according to a second embodiment of the present invention. FIG. 9 is a flowchart illustrating a system load measuring step of the information transfer method according to the second embodiment of the present invention. FIG. 14 is a format diagram illustrating a server load information table of the information transfer method according to the second to fourth embodiments of the present invention. FIG. 14 is a format diagram showing a client load information table of the information transfer method according to the second to fourth embodiments of the present invention. FIG. 11 is a flowchart illustrating a system load calculating step of the information transfer method according to the second embodiment of the present invention. FIG. 13 is a system configuration diagram of an information transfer device according to a third embodiment of the present invention. FIG. 13 is a flowchart illustrating a load measuring step of the information transfer method according to the third embodiment of the present invention. It is a flow chart figure showing an information transfer reservation process of an information transfer method concerning a 3rd embodiment of the present invention. FIG. 14 is a format diagram illustrating an information transfer reservation table of an information transfer method according to a third embodiment of the present invention. It is a flow chart figure showing a load calculation process of an information transfer method concerning a 3rd embodiment of the present invention. It is a flow chart figure showing an information transfer process of an information transfer method concerning a 3rd embodiment of the present invention. It is a system configuration diagram of an information transfer device according to a fourth embodiment of the present invention. It is a flow chart figure showing the difference information creation process of the information transfer method concerning a 4th embodiment of the present invention. It is a format diagram showing a difference information management table of the information transfer method according to the fourth embodiment of the present invention. It is a flow chart figure showing a load calculation process of an information transfer method concerning a 4th embodiment of the present invention. It is a flow chart figure showing a difference information transfer process of an information transfer method concerning a 4th embodiment of the present invention. It is a flow chart figure showing a difference information addition process of an information transfer method concerning a 4th embodiment of the present invention. It is a system configuration diagram of an information transfer device according to a fifth embodiment of the present invention. It is a flow chart figure showing an information accumulation process of an information transfer method concerning a 5th embodiment of the present invention. It is a flow chart figure showing a load measurement process of an information transfer method concerning a 5th embodiment of the present invention. It is a format diagram showing a communication load information table of the information transfer method according to the fifth embodiment of the present invention. It is a format diagram showing a server load information table of the information transfer method according to the fifth embodiment of the present invention. It is a flow chart figure showing a load calculation process of an information transfer method concerning a 5th embodiment of the present invention. It is a flow chart figure showing an information transfer process of an information transfer method concerning a 5th embodiment of the present invention. FIG. 2 is a system configuration diagram of a conventional information transfer device.

Explanation of reference numerals

Reference Signs List 11 information retrieval client 11a transfer information database 11b difference information loading means 11c server side difference information database 12 information storage server 12a transfer schedule database 12b transfer information creation means 12c transfer information database 12d transfer reservation database 120d information transfer reservation table 12e difference information creation means 12f server side difference information database 120f difference information management table 13 computer network 21 communication load measuring means 22 communication load database 22a communication load information table 23 communication load calculating means 24 information transfer means 25 system load measuring means 26 system load database 26a server load information Table 26b Client load information table 27 System load calculating means 28 Load measuring means 29 Load Database 29a communication load information table 29b server load information table 29c client load information table 30 information transfer reservation means 31 load calculation means 32 difference information transfer means 33 information storage means 34 load measurement means 35 load database 35a communication load information table 35b server load information Table 36 Load calculation means 37 Information transfer means 50 Information search request format 51 Transferable information amount calculation curve per second

Claims (6)

An information transfer device in a computer network comprising a server computer that is connected to each other using a communication medium and stores and provides information and a client computer that requests the information,
Load measurement means for measuring at least one of the communication load of the communication medium, the system load of the server computer, or the system load of the client computer;
An information transfer reservation unit that receives a request for information transfer from the client computer, and reserves a transfer as requested transfer information as transfer reservation information;
Load calculating means for calculating a transferable information amount from the load measured by the load measuring means, and instructing a start of transfer of the transfer reservation information when the transferable information amount is larger than the information amount of the transfer reservation information; When,
An information transfer unit for transferring the transfer reservation information to the client computer in response to the transfer start instruction. The load measuring means,
The communication load is measured using at least one of the number of packets flowing through the communication medium, the size of the packet, the number of collisions, and the line usage rate,
The system load includes the CPU usage rate of the computer, the number of disk I / Os, the number of page-in / out times, the number of swap-in / out times, the number of processes, the hit rate of the CPU cache, the hit rate of the disk cache, and the data transfer amount of the system bus. The information transfer device according to claim 1, wherein the measurement is performed using at least one of the following. An information transfer method in a computer network comprising a server computer that is connected to each other using a communication medium and stores and provides information and a client computer that requests the information,
A load measuring step of measuring at least one of a communication load of the communication medium, a system load of the server computer, or a system load of the client computer;
An information transfer reservation step of receiving a request for information transfer from the client computer, and making a transfer reservation using the requested information as transfer reservation information;
A load calculating step of calculating a transferable information amount from the load measured in the load measuring step, and instructing to start transfer of the transfer reservation information when the transferable information amount is larger than the transfer reservation information amount; When,
An information transfer step of transferring the transfer reservation information to the client computer in accordance with the transfer start instruction. The load measuring step,
The communication load is measured using at least one of the number of packets flowing through the communication medium, the size of the packet, the number of collisions, and the line usage rate,
The system load includes the CPU usage rate of the computer, the number of disk I / Os, the number of page-in / out times, the number of swap-in / out times, the number of processes, the hit rate of the CPU cache, the hit rate of the disk cache, and the data transfer amount of the system bus. 4. The information transfer method according to claim 3, further comprising the step of measuring using at least one of the following. A computer-readable recording medium that is connected to each other using a communication medium and records an information transfer program in a computer network including a server computer that stores and provides information and a client computer that requests the information,
Computer
Load measuring means for measuring at least one of the communication load of the communication medium, the system load of the server computer, or the system load of the client computer;
An information transfer reservation unit that receives a request for information transfer from the client computer, and reserves a transfer using the requested information as transfer reservation information;
Load calculating means for calculating a transferable information amount from the load measured by the load measuring means, and instructing a start of transfer of the transfer reservation information when the transferable information amount is larger than the information amount of the transfer reservation information; And a computer-readable recording medium recording an information transfer program for causing the client computer to function as information transfer means for transferring the transfer reservation information to the client computer in response to the transfer start instruction. The load measuring means,
The communication load is measured using at least one of the number of packets flowing through the communication medium, the size of the packet, the number of collisions, and the line usage rate,
The system load includes the CPU usage rate of the computer, the number of disk I / Os, the number of page-in / out times, the number of swap-in / out times, the number of processes, the hit rate of the CPU cache, the hit rate of the disk cache, and the data transfer amount of the system bus. The computer-readable recording medium recording the information transfer program according to claim 5, wherein the measurement is performed using at least one of the following.

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