JP6701826B2 - Information processing apparatus, system, method and program - Google Patents

Description

  The present invention relates to an information processing device, system, method and program.

  In order to use the mainframe in an open environment with excellent operability, it is necessary to transfer the environment information of the mainframe to the open environment. Here, the mainframe is an information processing device having high reliability, confidentiality, and closeness, which is used in a core business of a company or the like. The open environment is a standardized, interoperable and portable portability of the information processing system. The open environment uses a GUI (Graphical User Interface) to provide a user interface with excellent operability. The mainframe environment information includes information such as CPU (Central Processing Unit) usage rate, job execution results, and database definition.

  The mainframe compresses and divides data when transferring environment information to the open environment. However, when the load of the job executed by the mainframe is high and the CPU usage rate is high, the mainframe does not compress the data in order to avoid affecting the job.

  A file management device that stores and manages files measures the load status of the system where the files are used, and changes the file status when the system load is light, so that the user who is using the application can use it. There is a technology that does not impair the feeling.

  Also, when compressing the session state information of the user, a technique for enhancing the performance of the application server by automatically selecting the optimum compressor and compression method according to the size of the session state information and the conditions of system resources. There is.

  In addition, there is a technique that detects the system load and, when the detected system load exceeds a predetermined threshold value, lowers the priority of the file compression process so that other processes can be performed quickly.

JP, 11-24974, A Japanese Patent Publication No. 2009-503635 JP-A-2002-288013

  In the mainframe system, the basic CPU usage rate specified by the user is used as a threshold value regarding the CPU usage rate in order to prevent the influence on the core business. Therefore, when transferring the environment information to the open environment, the mainframe can determine whether or not to perform data compression with the basic CPU usage rate as a threshold value. However, since data compression is a process that is temporarily performed, other jobs may not be adversely affected even if the CPU usage rate temporarily exceeds the basic CPU usage rate due to the data compression processing.

  In such a case, it is necessary to temporarily change the basic CPU usage rate, but since the basic CPU usage rate is a threshold used as a basis for the entire mainframe system, changing the basic CPU usage rate will restart the system. Is required. In the case of a mainframe system, it takes about one hour to restart the system, and if the basic CPU usage rate is changed, there is a problem that the processing of core business is stopped due to the system restart.

  SUMMARY OF THE INVENTION In one aspect, the present invention aims to prevent a reboot of a mainframe system due to a change in a basic CPU usage rate for data compression.

  In one aspect, the information processing device includes a compression determination unit and a compression unit. The compression determination unit determines whether to compress the data based on a first threshold that is a threshold of the CPU usage rate and is dynamically changed based on the CPU usage rate when the data is compressed. .. The compression unit compresses data when the compression determination unit determines to compress the data.

  In one aspect, restarting the mainframe system can be prevented.

FIG. 1A is a diagram for explaining data transfer when the CPU usage rate is low. FIG. 1B is a diagram for explaining data transfer when the amount of data is small. FIG. 1C is a diagram for explaining data transfer when the CPU usage rate is high. FIG. 2 is a diagram illustrating the configuration of the data transfer system according to the embodiment. FIG. 3 is a diagram showing definitions of various CPU usage rates. FIG. 4 is a diagram illustrating an example of the threshold storage unit. FIG. 5 is a diagram showing an example of CPU information. FIG. 6 is a diagram illustrating an example of load information of a file transfer job. FIG. 7A is a first diagram illustrating a determination example. FIG. 7B is a second diagram illustrating a determination example. FIG. 8 is a diagram for explaining a change in the limit compression CPU usage rate. FIG. 9 is a flowchart showing a flow of data transmission processing by the mainframe. FIG. 10 is a flowchart showing the flow of data reception processing by the client. FIG. 11 is a flowchart showing the flow of the compression condition determination process. FIG. 12 is a flowchart showing the flow of the limit compression CPU usage rate changing process. FIG. 13 is a diagram illustrating a hardware configuration of a computer that executes the data transfer program according to the embodiment.

  Hereinafter, embodiments of the information processing device, system, method, and program disclosed in the present application will be described in detail with reference to the drawings. Note that this embodiment does not limit the disclosed technology.

  First, data transfer by a mainframe according to the embodiment will be described with reference to FIGS. 1A to 1C. FIG. 1A is a diagram for explaining data transfer when the CPU usage rate is low, FIG. 1B is a diagram for explaining data transfer when the data amount is small, and FIG. 1C is a CPU usage rate. It is a figure for demonstrating the data transfer in case of high. It should be noted that what kind of case is defined as a case where the CPU usage rate is low or a case where the CPU usage rate is high will be described later.

  As shown in FIG. 1A, when the CPU usage rate is low, the mainframe extracts the necessary data which is the data required by the open environment from the stored data (1) and compresses the extracted necessary data ( 2). Then, the main frame divides the compressed data according to the buffer size (3), and transfers the data in multiple times (4). The device on the receiving side combines the received data (5), decompresses the compressed data obtained by combining and restores the necessary data (6).

  Further, when the required data amount to be transferred is small and the required data fits in the buffer, the mainframe extracts the required data from the data to be stored (1) and stores the extracted required data as shown in FIG. 1B. Transfer without dividing and compressing (4). The device on the receiving side uses the received data as it is as necessary data.

  Further, when the CPU usage rate is high, as shown in FIG. 1C, the mainframe extracts the necessary data from the data to be stored (1) and adjusts the extracted necessary data to the buffer size without compression. It is divided (3), and data is transferred in multiple times (4). The device on the receiving side combines the received data and returns it to the necessary data (5).

  In this way, the mainframe can prevent the influence of the data compression on the core business by transferring the required data without compressing it when the CPU usage rate is high.

  Next, the configuration of the data transfer system according to the embodiment will be described. FIG. 2 is a diagram illustrating the configuration of the data transfer system according to the embodiment. As shown in FIG. 2, the data transfer system 1 according to the embodiment includes a mainframe 2 that executes jobs related to core business, and a client 4 that operates as a user interface device in an open environment.

  The mainframe 2 has a data transmission unit 20 that transmits environment information to the client 4. The data transmission unit 20 includes a reading unit 21, an extraction unit 22, a threshold value storage unit 23, a statistical information storage unit 24, a determination unit 25, a compression unit 26, a division unit 27, a transmission unit 28, and a change. It has a judging unit 29 and a threshold changing unit 30.

  The reading unit 21 reads data from the storage device 3 and transfers it to the extraction unit 22. The extraction unit 22 extracts the data to be transmitted to the client 4 from the data read by the reading unit 21. The threshold storage unit 23 stores a threshold value of the CPU usage rate used for determining whether or not to compress data.

  The mainframe 2 uses various CPU usage rates of the mainframe 2 to determine whether to compress the data. Therefore, various CPU usage rates used to determine whether or not to compress data will be described. FIG. 3 is a diagram showing definitions of various CPU usage rates. The unit of the CPU usage rate is %.

  As shown in FIG. 3, the "current CPU usage rate" is the CPU usage rate at the start of data compression. The “basic CPU usage rate” is a CPU usage rate designated by the user as a threshold for the mainframe 2. The “CPU usage rate within the compression time” is the CPU usage rate other than the compression processing within the time when the data compression processing is performed, and is the CPU usage rate estimated based on the past data. The “CPU usage rate for compression” is the CPU usage rate of the data compression processing alone.

  The “limit compression CPU usage rate” is a variable CPU usage rate used as a threshold when determining whether or not data compression processing is possible. The "actual compression CPU usage rate" is the CPU usage rate when data compression processing is actually performed. The "predicted compression CPU usage rate" is the total value of the CPU usage rate within the compression time and the CPU usage rate required for compression, and is the CPU usage rate predicted based on past data.

  The threshold storage unit 23 stores the basic CPU usage rate and the limit compression CPU usage rate as threshold values used for determining whether or not to compress data. FIG. 4 is a diagram illustrating an example of the threshold storage unit 23. As shown in FIG. 4, the threshold storage unit 23 stores, for example, 55% as the basic CPU usage rate and 65% as the critical compression CPU usage rate.

  The statistical information storage unit 24 stores statistical information based on past data. The statistical information storage unit 24 stores the CPU information and the load information of the file transfer job as the statistical information.

  The CPU information is a CPU usage rate based on past data. FIG. 5 is a diagram showing an example of CPU information. As shown in FIG. 5, the CPU information is information that associates a collection date and time, a collection time interval, and a CPU usage rate. The collection date and time is the date and time when the CPU usage rate was collected. The collection time interval is the time when the CPU usage rate is collected. The unit of the collection time interval is minutes. The unit of the CPU usage rate is %. For example, the CPU usage rate for 10 minutes from 11:10:03 on May 20, 2015 is 35%.

  The load information of the file transfer job is information regarding the load of the past file transfer. The data transmission unit 20 transmits the data as a file to the client 4. FIG. 6 is a diagram illustrating an example of load information of a file transfer job. As shown in FIG. 6, the load information of the file transfer job is information that associates the start time, the end time, the CPU usage rate for compression, the CPU usage rate within the compression time, the compressed data size, and the compression availability.

  The start time is the time when the data compression processing is started. The end time is the time when the data compression processing is ended. The CPU usage rate for compression and the CPU usage rate within the compression time are the CPU usage rates defined in FIG. The compressed data size is the size of data before compression. The unit of compressed data size is bytes. The compression propriety indicates whether the compression has been performed (permitted) or not (non). For example, in the data compression process performed from 13:26:10 on May 21, 2015 to 13:26:20 on May 21, 2015, 1 Mbyte of data is compressed, and the CPU used for the compression is used. The rate is 30%.

  The determination unit 25 determines whether or not to compress data based on the basic CPU usage rate and the limit compression CPU usage rate, except when the amount of transfer data is small and fits in the buffer. Specifically, the determination unit 25 determines to compress the data only when all of the following five conditions are satisfied.

(1) The current CPU usage rate does not exceed the basic CPU usage rate.
(2) The CPU usage rate within the compression time obtained from the statistical information does not exceed the basic CPU usage rate.
(3) The total value of the current CPU usage rate and the CPU usage rate for compression obtained from the statistical information does not exceed the critical compression CPU usage rate.
(4) The sum of the CPU usage rate within the compression time obtained from the statistical information and the CPU usage rate required for the compression obtained from the statistical information does not exceed the critical compression CPU usage rate.
(5) The total value of the CPU usage rate within the compression time obtained from the statistical information and the CPU usage rate required for the compression obtained from the statistical information does not always exceed the basic CPU usage rate.

  That is, the determination unit 25 determines that the CPU usage rate is low when all the conditions (1) to (5) are cleared, and there is a condition that even one of the above (1) to (5) is not cleared. In some cases, it is determined that the CPU usage rate is high.

  7A and 7B are a first diagram and a second diagram showing an example of the determination made by the determination unit 25. FIGS. 7A and 7B show five cases (a) to (e) in which compression is not performed because one of the conditions (1) to (5) is not satisfied, and (1) to (5) above. Three cases (f) to (h) in which all the conditions are cleared and compression is performed are shown.

  In (a) of FIG. 7A, since the current CPU usage rate exceeds the basic CPU usage rate, the condition (1) is not cleared and the data compression is not performed. In (b) of FIG. 7A, since the CPU usage rate within the compression time sometimes exceeds the basic CPU usage rate, the condition (2) is not cleared and the data compression is not performed. The past CPU usage rate is calculated based on the CPU usage rate for each time calculated using the CPU information shown in FIG. 5, and the past CPU usage rate duration is the file shown in FIG. It is calculated based on the compression time calculated using the load information of the transfer job.

  In (c) of FIG. 7A, the condition (3) is not cleared and the data compression is not performed because the total value of the current CPU usage rate and the CPU usage rate for compression exceeds the limit compression CPU usage rate. .. The CPU usage rate for compression is calculated based on the size of the compressed data using the load information of the file transfer job shown in FIG.

  In (d) of FIG. 7A, since the total value of the CPU usage rate within the compression time and the CPU usage rate required for compression, that is, the CPU usage rate during the expected compression sometimes exceeds the limit compression CPU usage rate, the condition (4) is satisfied. Is not cleared and data compression is not performed. In (e) of FIG. 7B, the condition (5) is cleared because the sum of the CPU usage rate within the compression time and the CPU usage rate required for compression, that is, the CPU usage rate during the expected compression always exceeds the basic CPU usage rate. No, no data compression is done.

  In (f) to (h) of FIG. 7B, since the conditions (1) to (5) are all cleared, data compression is performed. For example, in (f) of FIG. 7B, since the current CPU usage rate does not exceed the basic CPU usage rate, the condition (1) is cleared and the CPU usage rate within the compression time does not exceed the basic CPU usage rate. The condition (2) is cleared. Further, the condition (3) is cleared because the total value of the current CPU usage rate and the CPU usage rate for compression does not exceed the critical compression CPU usage rate. Further, the condition (4) is cleared because the total value of the CPU usage rate within the compression time and the CPU usage rate required for compression does not exceed the limit compression CPU usage rate. In addition, the total value of the CPU usage rate during the compression time and the CPU usage rate required for compression may be lower than the basic CPU usage rate, and does not always exceed the basic CPU usage rate. Therefore, the condition (5) is also cleared. ..

  Returning to FIG. 2, the compression unit 26 compresses the transfer data when the determination unit 25 determines to perform data compression. The division unit 27 divides the compressed data when the determination unit 25 determines to perform data compression, and divides the uncompressed transfer data when the determination unit 25 determines not to perform data compression. To do. As shown in FIG. 1B, when the amount of transfer data is small and the transfer data fits in the buffer, compression by the compression unit 26 and division by the division unit 27 are not performed.

  The transmitting unit 28 transmits the data divided by the dividing unit 27 to the client 4. When the division by the division unit 27 is not performed, the transmission unit 28 transmits the data compressed by the compression unit 26 to the client 4. If neither the division unit 27 nor the compression unit 26 performs compression, the transmission unit 28 transmits the transfer data to the client 4.

  The change determination unit 29 determines whether or not to change the limit compression CPU usage rate based on the actual compression CPU usage rate, and when it determines to change, calculates the change amount. When the change determination unit 29 determines to change the limit compression CPU usage rate, the threshold value change unit 30 changes the limit compression CPU usage rate based on the change amount calculated by the change determination unit 29.

  FIG. 8 is a diagram for explaining the change of the limit compression CPU usage rate. In FIG. 8, (a) shows a case where the critical compression CPU usage rate is lowered, (b) shows a case where the critical compression CPU usage rate is increased, and (c) shows a case where the critical compression CPU usage rate is not changed. As shown in FIG. 8A, when the CPU usage rate during actual compression exceeds the critical compression CPU usage rate, the change determination unit 29 changes (actual CPU usage rate-critical compression CPU usage rate). It is determined that the limit compression CPU usage rate is reduced as an amount.

  Further, as shown in FIG. 8B, when the actual compression CPU usage rate does not exceed the limit compression CPU usage rate and the expected compression CPU usage rate exceeds the actual compression CPU usage rate, the change is made. The determination unit 29 determines to increase the critical compression CPU usage rate. The change amount is (expected compression CPU usage rate−actual compression CPU usage rate).

  Further, as shown in (c) of FIG. 8, when the actual compression CPU usage rate does not exceed the limit compression CPU usage rate and the expected compression CPU usage rate does not exceed the actual compression CPU usage rate, change The determination unit 29 determines not to change the critical compression CPU usage rate.

  Returning to FIG. 2, the client 4 has a data receiving unit 40 that receives and displays data from the mainframe 2. The data receiving unit 40 includes a receiving unit 41, a combining unit 42, a decompressing unit 43, and a display unit 44.

  The receiving unit 41 receives the data from the mainframe 2 and transfers the data to the combining unit 42. The combining unit 42 combines the divided and sent data, and passes the combined data to the decompression unit 43. It should be noted that the combining unit 42 passes the combined data to the display unit 44 when the data is not compressed. The decompression unit 43 decompresses the compressed data and transfers it to the display unit 44. The display unit 44 displays the passed data on the display device.

  Next, a flow of data transmission/reception processing by the mainframe 2 and the client 4 will be described. FIG. 9 is a flowchart showing a flow of data transmission processing by the mainframe 2, and FIG. 10 is a flowchart showing a flow of data reception processing by the client 4. 9 and 10, a case where data is divided and transmitted/received will be described.

  As shown in FIG. 9, the data transmission unit 20 reads data from the storage device 3 (step S1) and creates necessary data (step S2). The data transmission unit 20 repeats steps S1 and S2 until all necessary data is extracted.

  Then, the data transmission unit 20 performs compression condition determination processing for determining whether or not to compress the data (step S3), and as a result of the compression condition determination processing, determines whether or not to compress (step S4). Then, when the data transmitting unit 20 determines to compress the data, the data transmitting unit 20 compresses the data (step S5).

  Then, the data transmission unit 20 writes the information of the file transfer job in the statistical information storage unit 24 (step S6), and performs the limit compression CPU usage rate changing process for changing the limit compression CPU usage rate (step S7). Then, the data transmission unit 20 divides the data (step S8) and repeatedly transmits the data for the number of divisions (step S9).

  On the other hand, in the client 4, as shown in FIG. 10, the data receiving unit 40 receives the data (step S11) and combines the data (step S12). Then, the data receiving unit 40 determines whether the combined data is compressed data (step S13), and if the combined data is compressed data, decompresses the data (step S14). Then, the data receiving unit 40 displays the data (step S15).

  As described above, when the data transmission unit 20 of the mainframe 2 determines that the data is compressed, the data is compressed, and when the data reception unit 40 of the client 4 decompresses the compressed data, the data is efficiently transferred. can do.

  Next, the flow of compression condition determination processing will be described. FIG. 11 is a flowchart showing the flow of the compression condition determination process. As shown in FIG. 11, the determination unit 25 sets “not compressed” in the processing result (step S21). Then, the determination unit 25 determines whether or not the current CPU usage rate exceeds the basic CPU usage rate (step S22), and if it does, ends the process.

  On the other hand, when the current CPU usage rate does not exceed the basic CPU usage rate, the determination unit 25 determines whether the CPU usage rate within the compression time exceeds the basic CPU usage rate (step S23). If it exceeds, the process is terminated.

  On the other hand, when the CPU usage rate within the compression time does not exceed the basic CPU usage rate, the determination unit 25 determines that the total value of the current CPU usage rate and the CPU usage rate required for compression exceeds the critical compression CPU usage rate. It is determined whether or not (step S24). Then, the determination unit 25 ends the process when the total value of the current CPU usage rate and the CPU usage rate for compression exceeds the critical compression CPU usage rate.

  On the other hand, when the total value of the current CPU usage rate and the CPU usage rate for compression does not exceed the limit compression CPU usage rate, the determination unit 25 performs the following processing. That is, the determination unit 25 determines whether the total value of the CPU usage rate within the compression time and the CPU usage rate required for compression exceeds the critical compression CPU usage rate (step S25). Then, the determination unit 25 ends the process when the total value of the CPU usage rate within the compression time and the CPU usage rate required for compression exceeds the limit compression CPU usage rate.

  On the other hand, when the total value of the CPU usage rate within the compression time and the CPU usage rate required for compression does not exceed the limit compression CPU usage rate, the determination unit 25 performs the following processing. That is, the determination unit 25 determines whether or not the total value of the CPU usage rate within the compression time and the CPU usage rate required for compression always exceeds the basic CPU usage rate (step S26). Then, the determination unit 25 ends the process when the total value of the CPU usage rate within the compression time and the CPU usage rate required for compression always exceeds the basic CPU usage rate.

  On the other hand, when there is a case where the total value of the CPU usage rate within the compression time and the CPU usage rate required for the compression does not exceed the basic CPU usage rate, the determination unit 25 sets “compress” in the processing result. (Step S27), the process ends.

  In this way, the determination unit 25 can determine whether or not to compress by checking the five conditions using the basic CPU usage rate and the limit compression CPU usage rate.

  Next, the flow of the limit compression CPU usage rate changing process will be described. FIG. 12 is a flowchart showing the flow of the limit compression CPU usage rate changing process. As shown in FIG. 12, the change determination unit 29 determines whether or not the CPU usage rate during actual compression exceeds the limit compression CPU usage rate (step S31), and if it exceeds, the limit compression CPU usage rate is used. It is determined that the rate should be reduced (step S32). That is, the change determination unit 29 sets the limit compression CPU usage rate=the limit compression CPU usage rate−(actual compression CPU usage rate−the limit compression CPU usage rate). Then, the threshold value changing unit 30 changes the limit compression CPU usage rate of the threshold value storage unit 23 (step S35).

  On the other hand, when the actual compression CPU usage rate does not exceed the limit compression CPU usage rate, the change determination unit 29 determines whether the predicted compression CPU usage rate exceeds the actual compression CPU usage rate. (Step S33). Then, when the predicted compression CPU usage rate does not exceed the actual compression CPU usage rate, the change determination unit 29 ends the process.

  On the other hand, when the predicted compression CPU usage rate exceeds the actual compression CPU usage rate, the change determination unit 29 determines to increase the limit compression CPU usage rate (step S34). That is, the change determination unit 29 sets the limit compression CPU usage rate=(expected compression CPU usage rate−actual compression CPU usage rate)+limit compression CPU usage rate. Then, the threshold value changing unit 30 changes the limit compression CPU usage rate of the threshold value storage unit 23 (step S35).

  In this way, the change determination unit 29 determines whether or not to change the limit compression CPU usage rate based on the actual compression CPU usage rate, thereby setting the limit compression CPU usage rate to an appropriate value based on the actual results. be able to.

  As described above, in the embodiment, the threshold storage unit 23 stores, in addition to the basic CPU usage rate, the limit compression CPU usage rate dedicated to data compression different from the basic CPU usage rate. Then, the determination unit 25 determines whether to compress the data based on the basic CPU usage rate and the limit compression CPU usage rate. When the determination unit 25 determines that the data is to be compressed, the compression unit 26 compresses the data. Therefore, the mainframe 2 can change the threshold value used for determining whether or not to compress the data by changing the limit compression CPU usage rate without changing the basic CPU usage rate. Therefore, the mainframe 2 can prevent the mainframe system from being restarted due to a change in the basic CPU usage rate for data compression.

  Further, in the embodiment, the change determination unit 29 determines whether or not to change the limit compression CPU usage rate based on the actual compression CPU usage rate, and if it is determined to change, calculates the change amount. Then, the threshold changing unit 30 changes the critical compression CPU usage rate based on the change amount calculated by the change determining unit 29. Therefore, the change determination unit 29 can set the critical compression CPU usage rate to an appropriate value based on the actual results.

  Further, in the embodiment, the determination unit 25 performs data compression when the predicted CPU compression rate during compression, which is the sum of the CPU usage rate within the compression time and the CPU usage rate required for compression, exceeds the critical compression CPU usage rate. Judge that there is no. The CPU usage rate within the compression time and the CPU usage rate required for the compression are values based on past statistical information. Therefore, the determination unit 25 can appropriately determine whether to compress the data based on the statistical information.

  Further, in the embodiment, the determination unit 25 determines that the data compression is not performed when the expected CPU usage rate during compression always exceeds the basic CPU usage rate during the data compression process. Therefore, the determination unit 25 does not compress the data when the processing load of the core business of the mainframe 2 is always high during the data compression processing, and thus the adverse effect on the core business can be prevented.

  Further, in the embodiment, the change determination unit 29 sets the limit compression CPU usage rate to (the actual compression CPU usage rate−the limit compression CPU usage rate) when the actual compression CPU usage rate exceeds the limit compression CPU usage rate. ) Only. Therefore, the change determination unit 29 can set the limit compression CPU usage rate to an appropriate value based on the actual results.

  Further, in the embodiment, the change determination unit 29 determines whether the predicted compression CPU usage rate exceeds the actual compression CPU usage rate when the actual compression CPU usage rate does not exceed the critical compression CPU usage rate. To judge. If the predicted compression CPU usage rate exceeds the actual compression CPU usage rate, the change determination unit 29 sets the limit compression CPU usage rate (predicted compression CPU usage rate-actual compression CPU usage rate). It is decided to raise only. Therefore, the change determination unit 29 can set the limit compression CPU usage rate to an appropriate value based on the actual results.

  Although the data transmission unit 20 of the mainframe 2 has been described in the embodiment, a data transfer program having the same function can be obtained by implementing the configuration of the data transmission unit 20 with software. Therefore, a computer that executes the data transfer program will be described.

  FIG. 13 is a diagram illustrating a hardware configuration of a computer that executes the data transfer program according to the embodiment. As shown in FIG. 13, the computer 50 has a main memory 51, a CPU 52, a LAN (Local Area Network) interface 53, and an HDD (Hard Disk Drive) 54. The computer 50 also has a super IO (Input Output) 55, a DVI (Digital Visual Interface) 56, and an ODD (Optical Disk Drive) 57.

  The main memory 51 is a memory that stores a program, a mid-execution result of the program, and the like. The CPU 52 is a central processing unit that reads a program from the main memory 51 and executes the program. The CPU 52 includes a chip set having a memory controller.

  The LAN interface 53 is an interface for connecting the computer 50 to another computer via a LAN. The HDD 54 is a disk device that stores programs and data, and the Super IO 55 is an interface for connecting an input device such as a mouse and a keyboard. The DVI 56 is an interface for connecting a liquid crystal display device, and the ODD 57 is a device for reading and writing DVDs.

  The LAN interface 53 is connected to the CPU 52 by PCI Express (PCIe), and the HDD 54 and the ODD 57 are connected to the CPU 52 by SATA (Serial Advanced Technology Attachment). The super IO 55 is connected to the CPU 52 by LPC (Low Pin Count).

  The data transfer program executed by the computer 50 is stored in the DVD, read from the DVD by the ODD 57, and installed in the computer 50. Alternatively, the data transfer program is stored in databases of other computer systems connected via the LAN interface 53, read from these databases, and installed in the computer 50. Then, the installed data transfer program is stored in the HDD 54, read out to the main memory 51, and executed by the CPU 52.

  Further, although the main frame 2 has been described in the embodiment, the present invention is not limited to this, and can be similarly applied to an information processing apparatus having a CPU usage rate similar to the basic CPU usage rate. .. That is, the present invention has a basic CPU usage rate used in the entire information processing apparatus, and if the basic CPU usage rate is changed, the present invention can be applied to an information processing apparatus that requires time-consuming restart. it can.

1 Data Transfer System 2 Mainframe 3 Storage Device 4 Client 20 Data Transmission Section 21 Reading Section 22 Extraction Section 23 Threshold Storage Section 24 Statistical Information Storage Section 25 Judgment Section 26 Compressing Section 27 Dividing Section 28 Transmission Section 29 Change Judgment Section 30 Threshold Change Part 40 data receiving part 41 receiving part 42 combining part 43 decompressing part 44 display part 50 computer 51 main memory 52 CPU
53 LAN interface 54 HDD
55 Super IO
56 DVI
57 ODD

Claims (9)

A compression determination unit that determines whether or not to compress the data based on a first threshold that is a threshold of the CPU usage rate and is dynamically changed based on the CPU usage rate when the data is compressed;
An information processing apparatus, comprising: a compression unit that compresses data when the compression determination unit determines to compress the data. A change determination unit that determines whether to change the first threshold value based on the CPU usage rate when the data is compressed;
The information processing apparatus according to claim 1, further comprising: a changing unit that changes the first threshold value when the change determining unit determines that the change is to be made.   The compression determination unit is a total value of the CPU usage rate within the compression time calculated based on the past statistical information of the information processing apparatus and the CPU usage rate required for the compression calculated based on the statistical information. The information processing apparatus according to claim 1, wherein when the CPU usage rate during compression exceeds the first threshold value, it is determined that the data is not compressed.   The compression determination unit is a total value of the CPU usage rate within the compression time calculated based on the past statistical information of the information processing apparatus and the CPU usage rate required for the compression calculated based on the statistical information. The CPU usage rate during compression is a threshold value of the CPU usage rate used for determining whether or not to compress the data in the information processing apparatus during the data compression process, and the second threshold value set by the user is always set. The information processing apparatus according to claim 1, 2 or 3, wherein the data is determined not to be compressed when exceeding the limit. The change determination unit determines to change the first threshold when the CPU usage rate when the data is compressed exceeds the first threshold,
The information processing apparatus according to claim 2, wherein the changing unit lowers the first threshold by a value obtained by subtracting the first threshold from a CPU usage rate when the data is compressed. The change determination unit uses the CPU when the CPU usage rate when the data is compressed does not exceed the first threshold and within the compression time calculated based on the past statistical information of the information processing apparatus. If the first threshold is changed when the expected compression CPU usage rate, which is the total value of the CPU usage rate for compression calculated based on the rate and the statistical information, exceeds the CPU usage rate when the data is compressed. Judge,
The information processing apparatus according to claim 2, wherein the changing unit raises the first threshold value by a value obtained by subtracting a CPU usage rate when the data is compressed from the expected CPU usage rate during compression. In a system having an information processing device that transmits data and a client device that receives the data,
The information processing device,
A compression determination unit that determines whether or not to compress the data based on a first threshold that is a threshold of the CPU usage rate and is dynamically changed based on the CPU usage rate when the data is compressed;
A compression unit that compresses data when it is determined to be compressed by the compression determination unit, and a transmission unit that transmits the data compressed by the compression unit;
The client device is
A receiver for receiving the data transmitted by the transmitter,
A decompression unit for decompressing the data received by the reception unit. Computer
Whether or not to compress the data is determined based on a first threshold that is a threshold of the CPU usage rate and is dynamically changed based on the CPU usage rate when the data is compressed,
A method of performing a process of compressing data when it is determined to compress. On the computer,
Whether or not to compress the data is determined based on a first threshold that is a threshold of the CPU usage rate and is dynamically changed based on the CPU usage rate when the data is compressed,
A program that executes a process of compressing data when it is determined to compress.

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