JP2006293743A - Server type computer and transfer evaluation decision apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To aim at improving the efficiency of a time for processing of an entire system program by taking into account a network line, data among computers, transmission and reception of resources as the entire system program, and functions to be executed. <P>SOLUTION: The server type computer is provided with a transfer evaluation decision means which has: a subprogram information storage part 135 for storing subprogram information including a data input output place and an amount of data input output to be used by the subprogram; a communication traffic volume evaluation means 132 for measuring a present communication speed as a communication evaluation index before executing the subprogram; a data input output evaluation means 133 for calculating a total amount of the input output data every input output place as a data evaluation index; and a subprogram transfer decision means 134 for generally determining whether or not transfer is necessary in consideration of use situations and communication situations of the data as well. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a system composed of a plurality of computers, a program, and a computer network that performs transmission processing between the computers. In particular, in a server computer centralized processing type program, transmission between a plurality of computers and realization of a program function. The present invention relates to a server-type computer and a transfer evaluation determination device that realizes shortening of processing time and transmission efficiency between programs and resources.

  In distributed processing in a computer network, a server that is a computer having a general purpose program that has resources and provides it as a common service, and a server that has individual processing programs and uses services provided by the server are used. In general, the programs are divided into clients, which are computers, and programs operating on the respective computers exchange data by communication and perform processing.

  Recently, from the viewpoint of program maintainability, there is a method in which a program is processed intensively on the server computer side and only user input / output information is transmitted on the client side (see, for example, Patent Document 1).

  FIG. 1 is a flowchart of distributed program processing when selecting execution of subprogram transfer in a conventional apparatus. Although FIG. 1 shows distributed program processing when the program is arranged on the client, conversely, similar processing can also be applied when the program is arranged on the server.

  First, in step S101, the client starts a system program and executes a main program. Next, in step S102, the client measures the communication speed between the client and the server when executing processing that uses the server resources.

  Next, in step S103, the client calculates the following two types of processing times based on the measured communication speed. The first processing time is a process when the client itself executes the subprogram without transferring the subprogram and uses the server resources from the client via the network (hereinafter referred to as the first process). The second processing time is the time required for processing when a processing program that uses server resources is transferred to the server and the resources are used in the server (hereinafter referred to as second processing). It is.

  Next, in step S104, the client compares the first processing time with the second processing time. If the first processing time is short, the client executes the first processing in step S105. On the other hand, if the second processing time is short or if both processing times are the same, the client executes the second processing in step S106.

  In step S107, the client outputs the processing result as necessary. Further, the client repeats the above steps S103 to S107 for each subprogram that uses the server resources (step S108).

  As described above, the conventional distributed program processing evaluates the processing time of the first processing and the second processing in advance each time a subprogram that uses server resources is executed during program execution. Choose the shorter one. As a result, the effect of reducing the processing time can be obtained particularly in a large-scale program.

JP-A-7-105149 (first page, FIG. 1)

  However, the prior art has the following problems. In the distributed program processing as described above, when using the resources of other computers, the processing time when the subprogram itself is transferred and when it is not transferred is evaluated in advance for each subprogram. Transfer processing times focusing only on the amount of program and resource data between computers are compared, and the efficiency of functions realized by resources and subprograms such as input / output data of subprograms is not considered.

  From the viewpoint of improving the maintainability and security of system programs, it is necessary to improve the processing time, including the program functions, against the background of the method of concentrating programs on server-type computers. It has become an indispensable problem.

  The present invention has been made in order to solve the above-described problems. In consideration of the network line and data between the computer and the resources as the entire system program, and the functions to be realized, the processing of the entire system program is performed. It is an object to obtain a server type computer and a transfer evaluation judging device for improving time efficiency.

  A server type computer according to the present invention is connected to a client type computer in a computer network system via a network, and executes processing of a system application program having one or more subprograms while using resources in the network. In the type computer, the subprogram information storage unit storing subprogram information in which the subprogram identifier is associated with the input / output location and the input / output data amount for each data used in the subprogram, and the subprogram is executed. Before, based on the communication amount evaluation means for measuring the current communication speed between the server type computer and the client type computer as a communication evaluation index, the input / output location and the input / output data amount extracted from the subprogram information storage unit The total amount of input / output data for each input / output location Based on the data input / output evaluation means calculated as the price index and the communication evaluation index and the data evaluation index, if the data evaluation index includes input / output data with the client computer as the input / output location, If it is determined that the corresponding subprogram needs to be transferred to the client computer, and the data evaluation index contains only input / output data that uses the server computer as the input / output location, the corresponding subprogram Is not required to be transferred to the client computer, and the data evaluation index does not include input / output data with the client computer as the input / output location. When the input / output data that is the output location is included, the processing time when the sub-program is executed on the server type computer, Transfer having a sub-program transfer determination means for calculating the processing time when the sub-program is executed by the client computer by transferring the program and determining whether the sub-program needs to be transferred or not by comparing the calculated processing times Evaluation judging means is provided.

  In addition, the transfer evaluation determination apparatus according to the present invention includes a computer network system in which a server type computer and a client type computer are connected via a network, and the server type computer uses one or more resources while utilizing resources in the network. When executing the processing of a system application program having a subprogram, the subprogram is transferred from the server computer to the client computer by receiving a transfer evaluation judgment command related to subprogram transfer from the server computer via the network. A transfer evaluation determination device for determining whether or not to perform a subprogram information storing subprogram information in which a subprogram identifier is associated with an input / output location and an input / output data amount for each data used in the subprogram Program information storage unit and transfer evaluation judgment command Therefore, before executing the subprogram, the subprogram information based on the traffic evaluation means for measuring the current communication speed between the server computer and the client computer as a communication evaluation index, and the transfer evaluation determination command Data input / output evaluation means for calculating the total amount of input / output data for each input / output location as a data evaluation index based on the input / output location and the amount of input / output data retrieved from the storage unit, and based on the communication evaluation index and the data evaluation index If the data evaluation index contains input / output data with the client computer as the input / output location, it is determined that the corresponding subprogram needs to be transferred to the client computer, and the data evaluation index If the server contains only input / output data that uses the server computer as the input / output location, the corresponding subprogram is The data evaluation index does not include input / output data that uses the client computer as the input / output location, and inputs / outputs other than the client computer and the server computer When I / O data is included as a location, processing time when a subprogram is executed on a server computer and processing time when a subprogram is executed on a client computer by transferring the subprogram Subprogram transfer determination means for determining whether transfer of the subprogram is necessary from the comparison of the calculated processing times, and returning the determined transfer necessity result to the server type computer as a response to the transfer evaluation determination command; It is equipped with.

  According to the present invention, it is determined whether or not the transfer of the subprogram is necessary based on the subprogram information including the input / output location of the data used in the subprogram and the amount of input / output data. It is possible to obtain a server type computer and a transfer evaluation / determination device capable of improving the processing time of the entire system program in consideration of the transmission / reception of data and resources as a whole and the functions to be realized.

  Hereinafter, preferred embodiments of a server type computer and a transfer evaluation judging device of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
FIG. 2 is a configuration diagram of the computer network system according to Embodiment 1 of the present invention. The computer network system in FIG. 2 includes a server type computer 100, a client type computer 200, and a network 300 that connects them to each other.

  The server type computer 100 includes a plurality of subprograms 110 and a system program 120 that performs mutual control of the subprograms 110, and determines transfer necessity determination based on prior evaluation. 130, a compression unit 140 that performs compression processing of the subprogram, and a communication unit 150 that performs communication of various data with the client computer 200 via the network 300.

  Here, the subprogram 110 uses resources on the server computer 100, the client computer 200, or other devices / computers on the network in the system program 120 for individual functions corresponding to each application. It is a program that is realized as a result.

  Further, the transfer evaluation judging means 130 for judging whether or not the sub program 110 needs to be transferred is a forced transfer evaluating means 131 for judging the sub program transfer forcing condition, and communication between the server type computer 100 and the client type computer 200. Based on the evaluation index collected by each determination means, the communication amount evaluation means 132 for measuring the speed, the data input / output evaluation means 133 for determining the input / output data amount and location of the subprogram, and whether or not the transfer of the subprogram is necessary. Subprogram transfer determination means 134 for comprehensively determining, and a subprogram information storage storing subprogram information in which subprogram identifiers are associated with input / output locations and input / output data amounts of data used in the subprograms Part 135 is provided.

  On the other hand, the client computer 200 communicates with the server computer 100 via the network 300 for various data including subprograms, and a decompressor 220 for decompressing the received compressed subprograms. It has.

  FIG. 3 is a diagram showing a data structure of the sub program information in the first embodiment of the present invention. The subprogram information 135a corresponding to each subprogram 110 includes information on “input location”, “input data item”, “output location”, “output data item”, and “forced transfer setting”. The subprogram information 135a is stored in the subprogram information storage unit 135 in association with the identifier (ID) of each subprogram.

  The “input place” and “output place” indicate a place where data is input to the sub program 110 or a place where data is output from the sub program 110. Specifically, data for identifying the server type computer 100, the client type computer 200, and other devices connected to these is set. Information on the “input place” and “output place” is used as a judgment material of the data input / output evaluation means 133.

  The “input data item” and “output data item” are set with the amount of input data and output data required by the subprogram 110. For example, in FIG. 3, an input data item described as I1 (10, 10) indicates the amount of data input as a two-dimensional array of (10, 10) from the input location PI1. The input data item described as I2 (200) indicates the amount of data input as a one-dimensional array of (200) from the same input location PI1.

  On the other hand, the output data item described as O1 (100) indicates the amount of data output as a one-dimensional array of (100) from the output location PO3. Information regarding these “input data item” and “output data item” is used as a determination material of the traffic evaluation means 132.

  Further, the “forced transfer setting” indicates whether the sub program 110 should be forcibly transferred to the client computer 200 (hereinafter referred to as forced transfer) or not forcibly transferred (hereinafter referred to as forced non-transfer). Or whether to determine whether transfer is necessary or not (hereinafter referred to as transfer necessity determination) is set.

  For example, in FIG. 3, “forced transfer setting = 1” indicates forced transfer, “forced transfer setting = 2” indicates forced non-transfer, and “forced transfer setting = 0” indicates transfer necessity determination. Yes. The “forced transfer setting” is used as a determination material of the forced transfer evaluation unit 131.

  In this way, the transfer evaluation determination unit 130 determines whether or not the sub program needs to be transferred based on the sub program information 135a included in the sub program 110.

  Next, a series of processes will be described in detail with reference to FIG. FIG. 4 is a flowchart of distributed program processing when determining whether or not the transfer of the subprogram is necessary in the first embodiment of the present invention. First, in step S401, the server type computer 100 starts a system program.

  Next, in step S402, the forced transfer evaluation unit 131 in the transfer evaluation determination unit 130 stores in the subprogram information 135a corresponding to the subprogram 110 that is stored in the subprogram information storage unit 135 and that should be determined whether transfer is necessary. The “forced transfer setting” information is read to determine whether the forced state (forced transfer or forced non-transfer) is set.

  If the forced state is set, in step S403, the forced transfer evaluation unit 131 determines whether the forced state is set to forced transfer from the server side to the client side or forced non-transfer. Then, if the forced transfer is a forced transfer, the forced transfer evaluation unit 131 shifts the process to step S409. If the forced transfer is not a forced transfer (that is, if it is a forced non-transfer), the process proceeds to step S413. Transition.

  On the other hand, if it is determined in step S402 that the forced state is not set, the process proceeds to step S404 and subsequent steps, and the transfer necessity determination unit 130 determines whether transfer is necessary. In step S404, the traffic evaluation unit 132 in the transfer evaluation determination unit 130 measures the communication speed between the client and the server by the following procedure. First, the communication volume evaluation unit 132 transmits a certain amount of data to the communication unit 210 on the client computer 200 via the communication unit 150 on the server computer 100, and measures the presence or absence of the response and the response time. To do.

  The communication amount evaluation unit 132 can calculate a communication speed as a communication evaluation index by transmitting a certain amount of data a plurality of times and obtaining an average value of response times at that time. For example, if data with a data amount of a (bytes) is transmitted four times and the average response time at that time is b (milliseconds), the communication amount evaluation means 132 calculates the communication speed from the values a and b. c is calculated as a × 1000 / b (bytes / second).

  Further, the communication amount evaluation unit 132 simultaneously measures the presence / absence of non-delivery at the time of four transmissions, and holds the transmission non-delivery information d as “non-delivery” if there is no non-delivery. The communication amount evaluation unit 132 holds the communication speed c (bytes / second) and the transmission failure information d as evaluation information. Specifically, the communication volume evaluation unit 132 adds the evaluation information of the communication speed c (bytes / second) and the transmission non-delivery information d to the data of the sub program information 135a, and stores it in the sub program information storage unit 135. Remember.

  Next, in step S 405, the data input / output evaluation unit 133 in the transfer evaluation determination unit 130 obtains “input location” and “output location” information corresponding to the sub program information 135 a stored in the sub program information storage unit 135. It is stored as evaluation information of reading, input source locations e1 to en, and output destination locations f1 to fn (1 to n are serial numbers for each input / output location).

  Further, in step S406, the data input / output evaluation unit 133 reads the information of “input data item” and “output data item” in the subprogram information 135a stored in the subprogram information storage unit 135, and determines the previous input source location. For each of e1 to en and output destination locations f1 to fn, input data amounts g1 to gn and output data amounts h1 to hn are obtained and held as data evaluation indexes.

  In step S407, the sub-program transfer determination unit 134 in the transfer evaluation determination unit 130 determines the communication evaluation index and the data evaluation index obtained in steps S404 to S406, and the size i (byte) after compression of the sub-program 110. Based on the above, it is comprehensively determined whether it is necessary to transfer the subprogram to the client side or whether it is not necessary to transfer the subprogram and the server side can perform the processing as it is. This “overall determination” will be specifically described later with reference to FIG.

  If the sub-program transfer determination unit 134 determines that transfer from the server side to the client side is necessary, the sub-program transfer determination unit 134 proceeds to step S409 and determines that transfer from the server side to the client side is not necessary. If so, the process moves to step S413.

  When it is determined that the subprogram needs to be transferred from the server side to the client side by the forced setting at the previous step S403 or the determination result of the necessity of transfer at step S408, the processing after step S409 is performed. Is done. First, in step S409, the compression unit 140 performs compression processing of the subprogram to be transferred. Next, in step S410, the communication unit 150 transfers the compressed subprogram to the client side.

  On the other hand, the client computer 200 receives the subprogram compressed by the communication unit 210 and decompresses the subprogram by the decompression unit 220 in step S411. In step S412, the client computer 200 executes the decompressed subprogram, and then returns the execution result to the server computer 100.

  On the other hand, if it is determined that it is not necessary to transfer the subprogram from the server side to the client side due to the forced setting in the previous step S403 or the determination result of the necessity of transfer in step S408, in step S413 The server type computer 100 executes the subprogram on the server.

  When the execution of the subprogram is finished in step S412 or step S413, in step S414, the system program 120 acquires the processing result and outputs the result using an output unit (not shown) as necessary. If there are a plurality of subprograms using the server resources, the processes from step S402 to S414 are repeated for each subprogram (step S415).

  Next, the “overall determination” performed in the previous step S407 will be described. FIG. 5 is a flowchart showing a processing procedure for comprehensive determination of necessity of transfer by the subprogram transfer determination means 134 in the first embodiment of the present invention.

  First, in step S501, the subprogram transfer determination unit 134 includes the evaluation information of the input source locations e1 to en and the output destination locations f1 to fn of the subprogram extracted by the data input / output evaluation unit 133 in the client. Does it include other computers installed in the same location as the type computer 200 or external input / output directly connected to the client type computer 200 (hereinafter referred to as input / output information related to the client type computer 200)? Determine whether or not.

  If the sub-program transfer determination unit 134 determines that input / output information related to the client computer 200 is included, the sub-program transfer determination unit 134 proceeds to step S502 and transfers the target sub-program 110 to the client side. It is determined that it is necessary, and the determination process ends.

  When data is repeatedly used, or depending on the arrangement of external devices that input and output the data, it is not possible to determine whether transfer is necessary with an emphasis on efficiency only by the amount of resource data. Therefore, the server type computer 100 according to the first embodiment does not determine whether transfer is necessary by paying attention only to the data amount of resources, but when input / output information related to the client type computer 200 is included. Determines that it is necessary to transfer the target subprogram 110 to the client side with emphasis on efficiency.

  On the other hand, if the subprogram transfer determination unit 134 determines that input / output information related to the client computer 200 is not included, the subprogram transfer determination unit 134 proceeds to step S503.

  Next, in step S503, the sub program transfer determination unit 134 installs all of the evaluation information of the input source locations e1 to en and the output destination locations f1 to fn in a device directly connected to the server itself or in the same location. It is determined whether the device is connected to or installed on another computer (hereinafter referred to as input / output information related to the server type computer 100).

  If the subprogram transfer determination unit 134 determines that all of the evaluation information of the input source locations e1 to en and the output destination locations f1 to fn are input / output information related to the server type computer 100, the subprogram transfer determination unit 134 The process proceeds to S504, where it is determined that there is no need to transfer the target subprogram 110 to the client side, and the determination process ends.

  On the other hand, the subprogram transfer determination means 134 cannot say that all of the evaluation information of the input source locations e1 to en and the output destination locations f1 to fn are input / output information related to the server type computer 100 (that is, the server type). If it is determined that input / output information related to computers other than the computer 100 and the client computer 200 is included), the process proceeds to step S505.

  In step S505, the sub-program transfer determination unit 134 determines whether or not the transmission failure information d obtained when the communication rate evaluation unit 132 previously determined the communication speed c is included. Then, the sub-program transfer determination unit 134 determines that the network environment is unstable when the transmission failure information d has occurred even once, and proceeds to step S504 to set the target sub-program 110 as a target. It is determined that there is no need to transfer to the client side, and the determination process ends.

  On the other hand, if the transmission non-delivery information d has never occurred, the sub-program transfer determination unit 134 proceeds to step S506. In step S506, the subprogram transfer determination unit 134 calculates the transfer time of the subprogram, executes the subprogram on the client side by transferring the subprogram on the processing time when the subprogram is executed on the server side. Comparison with the processing time of the case. Specifically, the sub program transfer determination unit 134 compares both processing times by the following processing.

Here, j, ka, kb, ma, and mb are defined as follows.
j: Internal program processing time (seconds) when the subprogram is executed
ka: Access time (seconds) required for the server to input input data on other computers via the network
kb: Access time (seconds) required for the client to input input data on other computers via the network
ma: Access time (seconds) required for the server to output the output data to other computers via the network
mb: Access time (seconds) required for the client to output the output data to other computers via the network

Further, n and p are defined as follows.
n: Program compression time (seconds)
p: Program decompression time (seconds)

I, c, g1 to gn, and h1 to hn are defined as follows.
i: Size after compression (bytes)
c: Communication speed (bytes / second)
g1 to gn: Amount of input data on other computers h1 to hn: Amount of output data to other computers

Based on the above definition, the next evaluation index value can be calculated. However, it is assumed that the internal processing time j of the subprogram is the same when executed by the server and when executed by the client.
Server side processing time q (seconds) = j + ka + ma
Client side processing time r (seconds) = j + i / c + kb + mb + n + p
ka, kb = Σ (g1 / c, g2 / c... gn / c)
ma, mb = Σ (h1 / c, h2 / c..., hn / c)

  Based on the obtained evaluation index value, the subprogram transfer determination unit 134 proceeds to step S502 when q> r (that is, when the server side processing time q is longer than the client side processing time r). It is determined that the program needs to be transferred to the client, and the process ends.

  On the other hand, if q ≦ r (that is, if the server-side processing time q is equal to or shorter than the client-side processing time r), the subprogram transfer determination means 134 needs to transfer to step S504 and transfer the subprogram to the client. It is determined that there is not, and the process is terminated.

  As described above, according to the first embodiment, by utilizing the subprogram information regarding the input / output location and the input / output data amount of the data used in the subprogram, and the communication status, along with the internal processing time of the subprogram, By comprehensively considering the data usage status and communication status, it is possible to determine whether or not the subprogram should be transferred. For each subprogram, consider the subprogram function efficiently. It is possible to select and execute a computer that can be processed.

  As a result, when the server computer performs the processing independently, the subprogram has a large amount of data input / output, and the input / output sources are distributed, or the system program has many functions. Therefore, the effect of improving the processing efficiency and shortening the processing time as a whole system program is great.

  In the above description, the internal processing time j of the subprogram is considered to be the same when executed by the server and when executed by the client. However, the individual internal processing time js (internal processing time on the server side) ) And jc (internal processing time on the client side), it is also possible to compare the above processing times q and r.

Embodiment 2. FIG.
In the second embodiment, a means for generating the subprogram information 135a of FIG. 3 described in the first embodiment based on the source code sentence of the subprogram 110 will be described. FIG. 6 is an explanatory diagram relating to the generation of the subprogram information 135a in the second embodiment of the present invention.

  In FIG. 6, the program source code conversion means 136 performs “input location” “input data item” “output location” “output data item” “forced transfer” as the sub program information 135 a based on the source code sentence 111 of the sub program. This is a means for generating each piece of information related to “setting”.

  When the source code sentence 111 of the subprogram includes a code related to input / output with an external device, the program source code conversion unit 136 obtains information on the input / output location and the data amount based on the corresponding code. Take out. For example, the program source code conversion unit 136 can specify the input / output location of data used in the subprogram from the name of the processing function included in the source code, and the input / output data amount from the reserved area of the variable definition included in the processing function. Can be identified.

  Further, the program source code conversion unit 136 can define the forced transfer setting from the specified input / output location and input / output data amount. For example, the program source code conversion unit 136 calculates the total data amount of the input / output information related to the client computer 200 based on the specified input / output location and the input / output data amount, and the calculated total data amount is predetermined. If the value is greater than or equal to the value, the forced transfer setting can be set to “forced transfer”.

  If the program source code conversion unit 136 determines that the input / output data is composed of only the input / output information related to the server type computer 100 based on the specified input / output location, the forced transfer setting is performed. Can be set to “forced non-forwarding”.

  In this way, the program source code conversion unit 136 generates the sub program information 135a corresponding to the corresponding sub program on the basis of the source code sentence 111 of the sub program, and stores it in the sub program information storage unit 135.

  Alternatively, the program source code conversion unit 136 generates the subprogram information 135a by describing the extracted information so as to be stored in a variable defined in a certain text rule, and stores the subprogram information 135a in the subprogram information storage unit 135. You can also. In this case, the program source code conversion unit 136 can read the stored variable and embed the subprogram information in the executable program when converting the subprogram into the executable code.

  As described above, according to the second embodiment, the subprogram information can be automatically created from the source code of the subprogram. Further, by converting the subprogram information into a code that can be processed inside the computer and embedding it in the executable program, it is possible to contribute to the improvement of the evaluation / determination processing performance for the transfer of the subprogram to the client.

Embodiment 3 FIG.
In the process of step S415 of FIG. 4 shown in the first embodiment, the transfer necessity determination process of steps S402 to S414 is repeated for each subprogram. In the third embodiment, a method for reducing the time required for the determination process by performing the transfer necessity determination process as necessary will be described.

  In the third embodiment, the subprogram transfer determination unit 134 adds the determination processing result and the determination processing time for each subprogram to the subprogram information 135a when executing the transfer necessity determination process for each subprogram. And stored in the subprogram information storage unit 135.

  Then, the subprogram transfer determination means 134 starts from the previous determination processing time added to the subprogram information 135a in the subprogram information storage unit 135 when executing the determination processing of whether or not the same subprogram needs to be transferred later. The elapsed time of is calculated.

  Further, if the calculated elapsed time is within the predetermined time, the subprogram transfer determination means 134 determines that the resource transmission / reception environment between the network environment and the computer has not changed significantly, and the previous determination process. Use the results as they are. As a result, it is possible to reduce the time related to the current transfer necessity determination process.

  As described above, according to the third embodiment, when the elapsed time from the execution of the previous subprogram is within a predetermined time, the determination process is performed by diverting the previous transfer necessity determination process result. The processing time equivalent to the previous execution time can be expected.

  In the third embodiment described above, the case where the previous transfer necessity determination processing result is diverted according to the elapsed time has been described. However, the actual processing time when the subprogram is executed is added to the subprogram information. As a result, the transfer necessity determination process can be performed in consideration of the actual processing time. In this way, by adding the actual processing time, for example, it is determined that the data should be transferred last time, but when the actual processing time is long, it can be determined that the current time is not transferred.

Embodiment 4 FIG.
In the first embodiment, the case where the server-type computer 100 includes the transfer evaluation determination unit 130 has been described. In the fourth embodiment, a case will be described in which the function of the transfer evaluation determination unit 130 is not provided in the server computer 100 but is provided independently as a new dedicated device on the network.

  FIG. 7 is a configuration diagram of a computer network system according to Embodiment 4 of the present invention. A transfer evaluation determination device 130a for determining whether or not a sub program needs to be transferred is provided on the network as a dedicated device.

  The transfer evaluation determination apparatus 130a in FIG. 7 has the same function as the transfer evaluation determination means 130 in FIG. 2, and includes a communication means 137 in the transfer evaluation determination apparatus 130a in order to communicate with other computers. ing. The transfer evaluation determination device 130 a receives a transfer evaluation determination command from the server type computer 100 for each execution of the subprogram, determines whether or not the corresponding subprogram needs to be transferred, and returns a determination result to the server type computer 100.

  In FIG. 2 which is the configuration of the first embodiment, the transfer evaluation determination means 130 provided in the server type computer 100 is replaced with a transfer evaluation determination which is an independent dedicated device in the computer network system as shown in FIG. By distributing the apparatus 130a in a distributed manner, it is possible to reduce the processing load on the server type computer 100 and shorten the determination processing time.

  Further, by arranging the transfer evaluation determination device 130a and the server type computer 100 in FIG. 7 at positions close to each other on the network, the influence of the network communication time element can be eliminated.

  According to the fourth embodiment, the transfer evaluation determination means in the server type computer is distributed as an independent transfer evaluation determination device in the computer network system, thereby reducing the processing load on the server type computer and determining the processing time. Can be shortened. Further, by making the arrangement of the server type computer and the transfer evaluation determination device close to each other on the network, the network communication time element between them can be eliminated and the determination process can be executed.

  It should be noted that the program source code conversion unit described in the second embodiment is incorporated into the transfer evaluation determination device described in the fourth embodiment, and the determination process based on the elapsed time described in the third embodiment is applied. Is possible.

It is a flowchart of the distributed program process at the time of selecting subprogram transfer execution in the conventional apparatus. It is a block diagram of the computer network system in Embodiment 1 of this invention. It is a figure which shows the data structure of the subprogram information in Embodiment 1 of this invention. It is a flowchart of the distributed program process at the time of determining the transfer necessity of the subprogram in Embodiment 1 of this invention. It is the flowchart which showed the process sequence of the comprehensive determination of the necessity of transfer by the subprogram transfer determination means in Embodiment 1 of this invention. It is explanatory drawing regarding the production | generation of the subprogram information in Embodiment 2 of this invention. It is a block diagram of the computer network system in Embodiment 4 of this invention.

Explanation of symbols

  100 server type computer, 110 subprogram, 111 subprogram source code statement, 120 system program, 130 transfer evaluation judging means, 130a transfer evaluation judging device, 131 forced transfer evaluating means, 132 traffic evaluation means, 133 data input / output evaluation Means, 134 subprogram transfer determination means, 135 subprogram information storage unit, 135a subprogram information, 136 program source code conversion means, 137 communication means, 140 compression means, 150 communication means, 200 client computer, 210 communication means, 220 Defrosting means, 300 networks.

Claims (8)

In a server type computer that is connected to a client type computer in a computer network system via a network and executes processing of a system application program having one or more subprograms while using resources in the network,
A subprogram information storage unit storing subprogram information in which an identifier of the subprogram is associated with an input / output location and an input / output data amount for each data used in the subprogram;
Before executing the subprogram, a traffic evaluation unit that measures a current communication speed between the server computer and the client computer as a communication evaluation index;
Data input / output evaluation means for calculating the total amount of input / output data for each input / output location as a data evaluation index based on the input / output location and the input / output data amount retrieved from the subprogram information storage unit;
Based on the communication evaluation index and the data evaluation index, if the data evaluation index includes input / output data with the client computer as an input / output location, the corresponding subprogram is changed to the client type. If it is determined that the data needs to be transferred to the computer, and the data evaluation index includes only input / output data that uses the server type computer as an input / output location, the corresponding subprogram is transferred to the client type computer. The data evaluation index does not include input / output data that uses the client computer as an input / output location, and includes data other than the client computer and the server computer. If input / output data as an output location is included, the processing when the sub-program is executed on the server type computer is executed. A sub-process for determining whether transfer of the sub-program is necessary or not by calculating a time and a processing time when the sub-program is executed by the client computer by transferring the sub-program. A server-type computer comprising: a transfer evaluation determination unit having a program transfer determination unit. The server type computer according to claim 1,
The subprogram information storage unit stores subprogram information further including forced transfer setting data for forcibly setting whether or not to transfer a subprogram.
The subprogram transfer determination means determines that the subprogram needs to be transferred to the client computer when the forced transfer setting data of the subprogram information is set to forced transfer. If the forced transfer setting data of the program information is set to forced non-transfer, it is determined that there is no need to transfer the subprogram to the client computer, and the forced transfer setting data of the subprogram information A server-type computer that performs a transfer necessity determination process based on the communication evaluation index and the data evaluation index when neither forced transfer nor forced non-transfer is performed. In the server type computer according to claim 1 or 2,
The transfer evaluation determination means identifies an input / output location of data used in the subprogram from the name of the processing function included in the source code of the subprogram, and inputs / outputs from a variable definition reservation area included in the processing function. A program for specifying a data amount, generating subprogram information by associating the specified input / output location and the input / output data amount with an identifier of a subprogram, and storing the generated subprogram information in the subprogram information storage unit A server type computer further comprising a source code conversion means. The server type computer according to any one of claims 1 to 3,
The subprogram transfer determination means adds the determination result and determination time of the transfer necessity to the subprogram information each time it determines whether the subprogram needs to be transferred, and stores it in the subprogram information storage unit. When determining whether or not the program needs to be transferred this time, the determination result and the determination time added to the subprogram information corresponding to the subprogram are extracted from the subprogram information storage unit as data at the time of the previous transfer necessity determination, When the elapsed time from the determination time is within a predetermined time, the server-type computer uses the determination result at the previous transfer necessity determination without performing the current transfer necessity determination process. . In a computer network system in which a server computer and a client computer are connected via a network, the server computer uses a resource in the network to process a system application program having one or more subprograms When executing the above, it is determined whether or not the sub-program should be transferred from the server-type computer to the client-type computer by receiving a transfer evaluation determination command regarding the sub-program transfer from the server-type computer via the network. A transfer evaluation judging device for judging,
A subprogram information storage unit storing subprogram information in which an identifier of the subprogram is associated with an input / output location and an input / output data amount for each data used in the subprogram;
Based on the transfer evaluation determination command, before executing the sub-program, a traffic evaluation unit that measures a current communication speed between the server computer and the client computer as a communication evaluation index;
Data that calculates the total amount of input / output data for each input / output location as a data evaluation index based on the input / output location and the input / output data amount retrieved from the subprogram information storage unit based on the transfer evaluation determination command Input / output evaluation means;
Based on the communication evaluation index and the data evaluation index, if the data evaluation index includes input / output data with the client computer as an input / output location, the corresponding subprogram is changed to the client type. If it is determined that the data needs to be transferred to the computer, and the data evaluation index includes only input / output data that uses the server type computer as an input / output location, the corresponding subprogram is transferred to the client type computer. The data evaluation index does not include input / output data that uses the client computer as an input / output location, and only the client computer and the server computer are input. If input / output data as an output location is included, the processing when the sub-program is executed on the server type computer is executed. Calculating the time and the processing time when the sub-program is executed by the client-type computer by transferring the sub-program, and determining whether the sub-program needs to be transferred or not by comparing the calculated both processing times, A transfer evaluation determination apparatus comprising: a subprogram transfer determination means for returning the determined transfer necessity result to the server computer as a response to the transfer evaluation determination command. In the transfer evaluation judgment device according to claim 5,
The subprogram information storage unit stores subprogram information further including forced transfer setting data for forcibly setting whether or not to transfer a subprogram.
The subprogram transfer determination means determines that the subprogram needs to be transferred to the client computer when the forced transfer setting data of the subprogram information is set to forced transfer. If the forced transfer setting data of the program information is set to forced non-transfer, it is determined that there is no need to transfer the subprogram to the client computer, and the forced transfer setting data of the subprogram information A transfer evaluation determination apparatus characterized by performing a transfer necessity determination process based on the communication evaluation index and the data evaluation index when neither forced transfer nor forced non-transfer is performed. In the transfer evaluation judgment device according to claim 5 or 6,
Specify the input / output location of the data used in the subprogram from the name of the processing function included in the source code of the subprogram, and specify the input / output data amount from the reserved area for the variable definition included in the processing function. A program source code conversion unit that generates subprogram information by associating the input / output location and the input / output data amount with an identifier of a subprogram, and stores the generated subprogram information in the subprogram information storage unit; A transfer evaluation judging device characterized by that. In the transfer evaluation judgment device according to any one of claims 5 to 7,
The subprogram transfer determination means adds the determination result and determination time of the transfer necessity to the subprogram information each time it determines whether the subprogram needs to be transferred, and stores it in the subprogram information storage unit. When determining whether or not the program needs to be transferred this time, the determination result and the determination time added to the subprogram information corresponding to the subprogram are extracted from the subprogram information storage unit as data at the time of the previous transfer necessity determination, When the elapsed time from the determination time is within a predetermined time, the transfer evaluation determination is characterized by using the determination result at the previous transfer necessity determination without performing the current transfer necessity determination process. apparatus.

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