JP5206602B2 - Air conditioning control device, air conditioning control method, and air conditioning control program - Google Patents

Description

  The present invention relates to an air conditioning control device that controls an air conditioning device that cools a computer, an air conditioning control method thereof, and an air conditioning control program thereof.

  The temperature of a room where a plurality of electronic computers (hereinafter referred to as “computers”) such as Internet data centers are arranged, even if the computer consumes the maximum power, the temperature of the computer is a predetermined temperature. It is set to be maintained below. In addition, a decrease in the processing capacity of the computer is prevented by maintaining the temperature below a predetermined temperature.

For this reason, when the arithmetic processing of the computer is performed relatively sparsely, the air conditioning is performed so that the room in which the computer is disposed is excessively cooled.
2. Description of the Related Art In recent years, with a growing trend toward environmental conservation, a method for controlling power consumption for air conditioning according to the operating state of a computer and reducing the power consumption is planned.

  As an example of such a method, the steady calorific value of the computer is measured in advance, the method of optimizing the arrangement of the computer and the air conditioner, the ambient temperature of the computer is monitored, and the temperature is monitored. A method for controlling the output of an air conditioner has been devised.

  Currently, the following air conditioning control method using a temperature sensor is being implemented. When a computing process is performed on a computer and a computation load is applied, the computer generates heat and the ambient temperature of the computer rises. A temperature sensor installed in the case of the computer measures the temperature rise. At this time, the air flow is increased and the air is blown at a reduced temperature from the air conditioner. In this way, the room is cooled to lower the temperature of the computer. Further, since the calorific value of the computer increases as the calculation load increases, the job execution status and job reservation status are collected, and temperature control is performed based on the collected information (see Patent Document 1).

Japanese Patent Laid-Open No. 2005-321162

However, the method for cooling the computer by controlling the air conditioner with the detection of the temperature rise of the computer has the following problems.
It takes time to detect an increase in temperature and to blow the air from the air conditioner into the room to lower it to a predetermined temperature. The computer is still performing arithmetic processing while this time elapses. For this reason, even after the air conditioner starts cooling, the temperature of the computer continues to rise and may temporarily exceed the threshold value. When the temperature exceeds the threshold, not only the computing performance of the computer is lowered, but also the power consumption of the computer is increased.

  In general, since the administrator of the air conditioner and the job manager of the computer are different, it is necessary to conceal the job data and it is difficult to obtain the amount of job data. For this reason, it is substantially difficult to predict the calculation load based on the job execution status or the like and perform temperature control.

  In view of the above points, an object of the present invention is to provide an air conditioning control device, an air conditioning control method, and an air conditioning control program that perform temperature control by predicting a temperature rise of a computer.

In order to achieve the above object, an air conditioning control device, an air conditioning control method, and an air conditioning control program for controlling an air conditioning device that cools a computer are provided.
The air conditioning control device holds distribution information that holds distribution information in which the communication amount of the computer is associated with the temperature increase amount of the computer until a predetermined time elapses after the communication amount is measured. And a predicted value of the temperature rise amount corresponding to the communication amount newly measured by the communication amount measuring unit for measuring the communication amount based on the distribution information, and the predicted value of the temperature rise amount and the temperature measuring unit Arithmetic control means for giving a cooling control instruction to the air conditioner with a cooling amount determined based on the actual temperature of the computer measured by the above-mentioned.

Moreover, in order to achieve the said objective, the air-conditioning control method which controls the air-conditioner which cools a computer is provided.
In this air conditioning control method, the distribution information holding means associates the communication amount of the computer with the temperature increase amount of the computer until a predetermined time elapses after the communication amount is measured. The calculation control means obtains a predicted value of the temperature increase amount corresponding to the communication amount newly measured by the communication amount measurement means for measuring the communication amount based on the distribution information, and calculates the temperature increase amount. A cooling control instruction is given to the air conditioner with a cooling amount determined based on the predicted value and the actual temperature of the computer measured by the temperature measuring means.

Moreover, in order to achieve the said objective, the air-conditioning control program which controls the air-conditioner which cools a computer is provided.
In this air conditioning control program, the computer holds distribution information in which the communication amount of the computer is associated with the temperature increase amount of the computer until a predetermined time elapses after the communication amount is measured. Based on the distribution information, a predicted value of the temperature rise amount corresponding to the communication amount newly measured by the communication amount measuring unit for measuring the communication amount is obtained based on the distribution information. It is made to function as a calculation control means for giving a cooling control instruction to the air conditioner with a cooling amount determined based on the actual temperature of the computer measured by the measuring means.

  In such an air conditioning control device, an air conditioning control method, and an air conditioning control program, the distribution information holding means causes the communication amount of the computer and the amount of increase in the computer temperature until a predetermined time elapses after the communication amount is measured. Is obtained based on the distribution information, and the calculation control means obtains the predicted value of the temperature rise amount corresponding to the communication amount newly measured by the communication amount measurement means for measuring the communication amount based on the distribution information. A cooling control instruction is given to the air conditioner with a cooling amount determined based on the predicted value of the temperature rise amount and the actual temperature of the computer measured by the temperature measuring means.

  In the air conditioning control device, the air conditioning control method, and the air conditioning control program described above, optimum temperature control can be performed in consideration of the temperature rise of the computer. As a result, it is possible to suppress the power consumption of the computer and the air conditioner and the deterioration of the computing performance of the computer.

It is a key map of an air-conditioning system for explaining an outline of an embodiment. It is a schematic diagram for demonstrating the data flow of the air conditioning system of embodiment. It is a figure for demonstrating the air conditioning system of 1st Embodiment. It is a figure for demonstrating the hardware constitutions of the air-conditioning control apparatus of 1st Embodiment. It is a figure for demonstrating the function of the air-conditioning control apparatus of 1st Embodiment. It is a figure for demonstrating an example of the communication amount temperature distribution of 1st Embodiment. It is a figure for demonstrating an example of the data regarding a computer. It is a flowchart which shows the process sequence of the air-conditioning control apparatus of 1st Embodiment. It is a flowchart which shows the process sequence of the update of the communication amount temperature distribution database by the air-conditioning control apparatus of 1st Embodiment. It is a flowchart which shows the process sequence for calculating the instruction | indication time by the air-conditioning control apparatus of 1st Embodiment. It is a figure for demonstrating an example of the data regarding the temperature rise amount with respect to the communication amount. It is a figure for demonstrating the control method of the air-conditioning control apparatus of 2nd Embodiment. It is a flowchart which shows the process sequence for calculating the instruction | indication time by the air-conditioning control apparatus of 3rd Embodiment.

Hereinafter, embodiments will be described with reference to the drawings.
FIG. 1 is a conceptual diagram of an air conditioning system for explaining the outline of the embodiment.
The air conditioning system 1 includes an air conditioner 3, an air conditioning control device 4, a communication amount measuring unit 5, and a temperature measuring unit 6 with respect to the computer 2.

  The computer 2 performs a predetermined process according to information received from the outside. In addition, since the information received by the computer 2 is instruction information for causing the computer 2 to perform an operation or information necessary for the operation, the amount of calculation load given to the computer 2 is indirectly estimated. Is possible. Therefore, it can be predicted that the temperature of the computer 2 may rise by measuring the communication amount of information transmitted to the computer 2. By controlling the air conditioner 3 described later based on this prediction, it is possible to achieve both the reduction of power consumption by the optimum control of the air conditioner 3 and the countermeasure for lowering the calculation performance caused by the temporary temperature rise of the computer 2. It becomes possible.

  The air conditioner 3 cools the computer 2 by sending a cool air amount so as to maintain the computer 2 below a predetermined temperature. Further, when the air is blown to the computer 2, the air blowing temperature and the air blowing amount are controlled in accordance with a cooling control instruction from the air conditioning control device 4 described later.

  The air conditioning control device 4 controls the air temperature and the air flow rate of the air conditioner 3 with respect to the computer 2 according to the communication amount of information received by the computer 2 so that the air conditioner 3 cools the computer 2. Instructs cooling control. The air conditioning control device 4 includes a distribution information holding unit 4a, a calculation control unit 4b, and a distribution information updating unit 4c in order to realize such control for the air conditioning device 3. Each processing means of the air-conditioning control device 4 has its processing functions realized by a computer executing an air-conditioning control program.

  The distribution information holding means 4a is a distribution in which the communication amount of information received by the computer 2 is associated with the temperature increase amount of the computer 2 during a predetermined time after the communication amount is measured. Keep information. Such distribution information is previously measured for the computer 2 and is held in the distribution information holding means 4a. It is assumed that the cooling amount necessary for cooling the increased temperature with respect to the temperature increase amount is known. Further, it may be measured at the time of distribution information measurement. Here, the cooling amount is a general term for instruction values to be instructed to the air conditioner 3 such as an air blowing amount and an air blowing temperature.

  The arithmetic control unit 4b is based on the temperature of the computer 2 measured by the temperature measuring unit 6 and the predicted value of the temperature rise amount of the computer 2 based on the communication amount measured by the communication amount measuring unit 5 described later. Then, cooling control of the air conditioner 3 is performed. Hereinafter, the first temperature control based on the temperature of the computer 2 is referred to as normal control, and the second temperature control based on the predicted value of the temperature increase amount according to the communication amount is referred to as prediction control. In the normal control, the cooling amount is calculated so that the temperature of the computer 2 measured by the temperature measuring means 6 becomes a preset temperature. In the predictive control, the temperature rise amount corresponding to the communication amount of the computer 2 measured by the communication amount measuring unit 5 is predicted with reference to the distribution information held in the distribution information holding unit 4a. Then, a cooling amount corresponding to the predicted temperature increase amount is calculated. The cooling amount calculated by the normal control and the cooling amount calculated by the predictive control are added together to determine the cooling amount to be instructed to the air conditioner 3. Note that the cooling amount by the predictive control is adjusted in consideration of the variation in the predicted value of the temperature rise amount, and the timing to add to the cooling amount calculated by the normal control is adjusted. At this time, it is adjusted so as to be the earliest timing within the range expected to be cooled.

  The distribution information updating unit 4c acquires the communication amount input to the computer 2 per predetermined time measured by the communication amount measuring unit 5, and the temperature of the computer 2 measured by the temperature measuring unit 6, and the distribution information Register with. It should be noted that it takes a predetermined time until the temperature actually increases after a certain amount of communication is detected. Therefore, in the distribution information, the communication amount and the temperature after a predetermined time has elapsed since the communication amount was measured are registered in association with each other. Since this predetermined time varies depending on the computer 2 and the air conditioner 3, it is set appropriately for each system. Further, it may be determined by actually measuring.

  The communication amount measuring means 5 is installed for each destination of information to be transmitted, for example, and measures and acquires the amount of communication per unit time of information destined for the computer 2. And the acquired communication amount is notified to the calculation control means 4b and the distribution information update means 4c, respectively.

  The temperature measuring means 6 has, for example, a computer 2 or a temperature sensor (not shown) installed in a rack on which the computer 2 is placed, and obtains a temperature measurement result of the computer 2 measured by the temperature sensor. To do. And the acquired temperature is each notified to the calculation control means 4b and the distribution information update means 4c. As described above, the computer 2 generates heat in accordance with the received information, and a predetermined time is required until the temperature measuring means 6 measures the temperature of the computer 2 from the increased temperature. The increased temperature of the computer 2 is measured by the temperature measuring means 6 after a certain amount of time has elapsed after measuring the communication quantity of the communication quantity measuring means 5.

Next, a method of controlling the air conditioner 3 in the air conditioner control apparatus 4 having the above configuration will be described with reference to the data flow in the air conditioner system 1 together with FIG.
FIG. 2 is a schematic diagram for explaining a data flow of the air conditioning system according to the embodiment. The temperature A is the temperature of the computer 2 measured by the temperature measuring means 6, the cooling amount B is the cooling amount of the air conditioner 3 with respect to the computer 2, and the timing adjustment G is the cooling timing of the air conditioner 3 with respect to the computer 2. Indicates adjustment. Further, the distribution information C, the communication amount D, the predicted temperature rise amount E, and the cooling amount F are as described above.

First, the cooling control of the air conditioner 3 by the normal control of the arithmetic control means 4b is performed as follows.
The calculation control unit 4b calculates the cooling amount B so that the temperature A of the computer 2 measured by the temperature measurement unit 6 becomes a predetermined set temperature. The arithmetic control means 4b controls the cooling of the air conditioner 3 so as to cool the computer 2 with the calculated cooling amount B.

  When instruction information for performing a predetermined calculation process is transmitted to the computer 2 while the air conditioner 3 is cooling the computer 2 in accordance with such normal control, the prediction of the calculation control means 4b is performed. Control is performed.

  The communication amount measuring unit 5 measures the communication amount D of the instruction information transmitted to the destination of the computer 2. The temperature measuring unit 6 measures the temperature of the computer 2 that has generated heat according to the received instruction information after measuring the communication amount D of the communication amount measuring unit 5.

  The arithmetic control unit 4b refers to the distribution information C held by the distribution information holding unit 4a, and predicts the predicted temperature rise amount E of the computer 2 corresponding to the communication amount D measured by the communication amount measuring unit 5. . Then, a cooling amount F corresponding to the predicted predicted temperature rise amount E is calculated.

  Further, the arithmetic control unit 4b adds the cooling amount F calculated by the predictive control to the cooling amount B calculated by the normal control, and determines the cooling amount to be instructed to the air conditioner 3. The arithmetic control unit 4b adjusts the timing of adding the cooling amount F by the predictive control to the cooling amount B calculated by the normal control in consideration of the variation of the predicted temperature rise amount E (timing adjustment G).

  The distribution information of the communication amount and the temperature rise amount held in the distribution information holding unit 4a is updated by the distribution information updating unit 4c every time the communication amount and the temperature are acquired from the communication amount measuring unit 5 and the temperature measuring unit 6. The

  Such an air conditioning control device 4 suppresses a temporary temperature rise of the computer 2. For this reason, the extra power consumption of the computer 2 and the fall of the calculation performance of the computer 2 can be suppressed. Moreover, since the air conditioner 3 is operated based on the predicted value of the temperature rise amount of the computer 2, excessive air conditioning is not performed, and the power consumption of the air conditioner 3 can be suppressed. Furthermore, since the amount of communication is used for the prediction of the temperature rise due to the computation load of the computer 2, it is necessary to maintain the confidentiality of information (data), obtain the data itself, and analyze the computation load amount. No.

Hereinafter, specific air conditioning control of the air conditioner will be described based on the above. In the following embodiment, the case where each computer 20 changes temperature uniformly will be described as an example.
[First Embodiment]
FIG. 3 is a diagram for explaining the air conditioning system according to the first embodiment.

The air conditioning system 10 includes an air conditioning device 30 and an air conditioning control device 40 for the plurality of computers 20.
In the computer 20, for example, four computers 20 a, 20 b, 20 c, and 20 d are accommodated in a rack 22. Each of these computers 20 performs a predetermined process according to the information received from the outside. When the computer 20 performs a process according to the information, the computer 20 generates a calculation load and generates heat. Since the information received by the computer 20 is instruction information for performing the calculation or information necessary for the calculation, it is possible to indirectly estimate the calculation load applied to the computer 20. . Therefore, it is possible to predict that the temperature of the computer 20 may rise by measuring the communication amount of information transmitted to the computer 20. The computer 20 has a temperature rise characteristic with respect to a calculation load per unit time. For example, if the temperature rise characteristic of the computer 20 is 10 ° C./min, when the computer 20 is subjected to a predetermined calculation load, the temperature of the computer 20 increases by about 10 ° C. after 1 minute.

  The air conditioner 30 blows air to the computer 20 so as to maintain the computer 20 below a predetermined temperature. Further, when air is blown to the computer 20, the air blowing temperature and the air blowing amount are controlled. In the following description, it is assumed that the air temperature is controlled by controlling the air flow rate while keeping the air temperature constant. When adjusting the air temperature, a known method of adjusting the air temperature and the air volume based on the determined air temperature (constant) and the air volume is performed.

  The air conditioning control device 40 is notified of the temperature rise amount of the computer 20 measured by the temperature sensor 21 installed in the rack 22 in which the computer 20 is housed. In FIG. 3, the temperature sensors 21 a to 21 d are respectively installed in the rack 22 corresponding to the computers 20 a to 20 d. In addition, the air conditioning control device 40 is notified of the communication amount of information received by the computer 20 from the communication amount measuring device 50 described later. The air conditioning control device 40 controls the air temperature and instruction time of the air conditioner 30 with respect to the computer 20 according to the communication amount of information received by the computer 20, and causes the air conditioner 30 to send air to the computer 20. . The details of the air conditioning control device 40 will be described later. The temperature rise amount can be regarded as a rise amount from a constant temperature controlled by the control unit 44 (described later) of the air conditioning control device 40 to a maximum temperature measured by inputting a certain communication amount.

  The communication amount measuring device 50 is installed for each destination of information to be transmitted, and measures the amount of communication per unit time of information destined for the computer 20. The communication amount measuring device 50 notifies the air conditioning control device 40 of the measured communication amount.

Hereinafter, the air conditioning control device 40 will be described more specifically.
FIG. 4 is a diagram for explaining a hardware configuration of the air-conditioning control apparatus according to the first embodiment.

  The entire air conditioning control device 40 is controlled by a CPU (Central Processing Unit) 40a. A random access memory (RAM) 40b, a hard disk drive (HDD) 40c, a graphic processing device 40d, an input interface 40e, and a communication interface 40f are connected to the CPU 40a via a bus 40g.

  The RAM 40b temporarily stores at least part of an OS (Operating System) program and application programs to be executed by the CPU 40a. The RAM 40b stores various data necessary for processing by the CPU 40a. The HDD 40c stores an OS program and application programs.

  A monitor 101 is connected to the graphic processing device 40d. The monitor 101 can output, for example, the communication amount of information received by the computer 20 and the temperature increase amount of the computer 20 corresponding to the communication amount.

  Input devices such as a keyboard 102 and a mouse 103 are connected to the input interface 40e. For example, a manager of a computer room in which the computer 20 is arranged can specify and input a desired temperature in order to control the temperature in the computer room via such an input device.

  The communication interface 40f includes a temperature sensor 21, a communication amount measuring device 50, and an air conditioner 30 installed in the rack 22 in which the computer 20 is housed (the temperature sensor 21, the communication amount measuring device 50, and the air conditioner 30 are shown in FIG. 4). Are not connected to each other). The communication interface 40f receives information about the temperature and the communication amount from the temperature sensor 21 and the communication amount measuring device 50. In addition, the air conditioning control device 40 transmits a predetermined control signal to the air conditioning device 30 via the communication interface 40f.

It should be noted that a hardware configuration that can be controlled by remote operation may be provided instead of the graphic processing device 40d, the input interface 40e, and the like.
Next, the functional configuration of the air conditioning control device 40 will be described.

  FIG. 5 is a diagram for explaining functions of the air-conditioning control apparatus according to the first embodiment. FIG. 6 is a diagram for explaining an example of a communication traffic temperature distribution according to the first embodiment, and FIG. 7 is a diagram for explaining an example of data related to a computer. In FIG. 6, the horizontal axis represents the amount of communication (packet / second), the vertical axis (left side) represents the temperature rise (° C.), and the vertical axis (right side) represents the air flow rate (unit and scale omitted). In FIG. 6, ◆ represents a measured value of the communication amount and the temperature increase amount, a solid line represents a linear function obtained by approximating the distribution of the measured value of the communication amount and the temperature increase amount by the least square method, and a broken line represents the communication The amount of blast with respect to quantity is expressed, respectively.

  The air conditioning control device 40 includes a communication temperature distribution DB (database) 41, a creation unit 42, a calculation unit 43, and a control unit 44. The air conditioning control device 40 operates as the air conditioning control device 4 in FIG. Accordingly, the communication temperature distribution database 41 realizes the processing functions of the distribution information holding unit 4a, the creation unit 42 of the distribution information updating unit 4c, and the calculation unit 43 and the control unit 44 of the calculation control unit 4b.

  The communication amount temperature distribution database 41 holds the communication amount per unit time at a certain point in time for the information received by the computer 20 for each computer 20. Furthermore, distribution information of measured values with respect to a temperature rise amount after a predetermined time has elapsed from a certain point of time when the computer 20 that has generated heat by performing processing under a calculation load corresponding to the information is held for each computer 20. ing. Such distribution information is previously measured for the computer 20 in advance. For example, as shown in FIG. 6, such distribution information is obtained from a measurement result of a communication amount and a temperature increase amount corresponding to the communication amount information.

  Further, the communication volume temperature distribution database 41 also holds correlation information of the communication volume and the temperature rise amount approximated by the least square method from this distribution information. For example, in FIG. 6, the correlation function between the communication amount and the temperature increase amount is approximated by a linear function (y≈0.1076x) from the distribution information by the least square method. The calculated correlation function is not limited to a linear function as in the example of FIG. Alternatively, the range of traffic may be divided and a correlation function may be obtained for each divided range. The value obtained from the linear function into which the communication amount is substituted is the predicted temperature increase amount (predicted temperature increase amount) of the computer 20 that has received the communication amount.

  Further, as shown in FIG. 7, the communication temperature distribution database 41 stores, for each computer 20, a predicted temperature increase amount, a maximum value, and an instruction time with respect to the communication amount from the distribution information of FIG. ing. The predicted temperature rise amount is, for example, a value obtained from a linear function into which the communication amount 10 (packet / second) is substituted. The maximum value is the maximum temperature rise amount among the temperature rise amounts varying as shown in FIG. The instruction time is calculated by the instruction time calculation unit 43b as will be described later.

The distribution information and the correlation information held in the communication amount temperature distribution database 41 are updated every time the air conditioning control device 40 acquires the communication amount and the temperature increase amount.
The creation unit 42 creates distribution information in the communication amount temperature distribution database 41 from the acquired communication amount and temperature rise amount. Further, every time the communication amount and the temperature increase amount are acquired, the distribution information held in the communication amount temperature distribution database 41 is updated. In order to perform such processing, the creation unit 42 includes a reception measurement unit 42a, an update unit 42b, and a correlation calculation unit 42c. Each configuration will be described below.

  The reception measurement unit 42a receives the communication amount measured by the communication amount measurement device 50. Moreover, the reception measurement part 42a receives the amount of temperature rises which the temperature sensor 21 measured of the computer 20 which processed according to the information after receiving communication amount. Furthermore, the reception measuring unit 42a measures the time (delay time) until the temperature increase amount corresponding to the communication amount is received after the communication amount is received.

  The update unit 42b updates the distribution information of the communication amount temperature distribution database 41 by adding the communication amount and the temperature increase amount to the communication amount temperature distribution database 41 every time the communication amount and the temperature increase amount are received from the reception measurement unit 42a. To do. For example, the update unit 42b adds and updates the communication amount and the temperature increase received from the reception measurement unit 42a to FIG.

  The correlation calculation unit 42c calculates a correlation function in which the correlation between the communication amount and the temperature increase amount is approximated from the distribution information of the communication amount temperature distribution database 41 by the least square method. In addition, the correlation calculation unit 42c updates the correlation function every time the communication volume temperature distribution database 41 is updated. The correlation function is held in the communication temperature distribution database 41. For example, the correlation calculation unit 42c calculates a linear function from the distribution of FIG. 6 by the least square method. Further, each time the distribution information in FIG. 6 is updated, the linear function is updated.

  The calculation unit 43 performs a predetermined calculation using the acquired communication amount and communication amount temperature distribution database 41 to calculate a cooling amount based on the predicted value of the temperature increase amount according to the communication amount. In addition, the calculation unit 43 includes a cooling amount calculation unit 43a and an instruction time calculation unit 43b in order to perform the calculation. Each configuration will be described below.

  The cooling amount calculation unit 43 a calculates the cooling amount (air flow rate) for the computer 20 that has generated heat, taking into account the surface temperature of the rack 22 based on the correlation function of the communication amount temperature distribution database 41. As shown in FIG. 7, for example, when the measured communication amount is 20 (packets / second), the predicted temperature increase amount obtained from the linear function with respect to the communication amount is T2. In accordance with the predicted temperature rise amount, the cooling amount calculation unit 43a calculates the air blowing amount that can cool the computer 20. Note that the air blowing amount may be measured in advance according to the predicted temperature rise amount or may be determined based on experience. In addition, the cooling amount calculation unit 43a notifies the control unit 44 of the calculated blowing amount together with an instruction time to be described later.

  The instruction time calculation unit 43 b calculates the timing (instruction time) for blowing air to the air conditioner 30 from the information held in the communication amount temperature distribution database 41 and the temperature rise characteristics of the computer 20. As a specific example, a case where the communication amount in FIG. 6 is 50 (packet / second) will be described. First, the variation in the temperature rise amount with respect to the communication amount is calculated from FIG. The temperature width is calculated by taking the difference between the maximum variation and the predicted temperature rise with respect to the communication amount. Then, the instruction time is calculated by dividing the temperature range by the temperature rise characteristic of the computer 20.

  And the control part 44 performs cooling control of the air conditioner 30 so that the temperature of the computer 2 may become the preset temperature normally based on the temperature of the computer 20 notified from the temperature sensor 21 normally. Further, a cooling instruction is given to the air conditioner 30 that performs normal cooling so as to be cooled by adding the amount of air sent from the calculation unit 43. In addition, the timing which adds ventilation volume is adjusted based on the instruction | indication time calculated in the instruction | indication time calculation part 43b.

The operation of the air conditioning control device 40 having such a hardware configuration and functions will be described below.
FIG. 8 is a flowchart illustrating a processing procedure of the air-conditioning control apparatus according to the first embodiment.

[Step S1]
The air conditioning control device 40 controls the air conditioning device 30 only by the control unit 44 so that the temperature of the computer 20 measured by the temperature sensor 21 installed in the rack 22 in which the computer 20 is stored becomes a predetermined temperature (this). In the state, it will begin to cool after the temperature rises). Then, the communication amount measuring device 50 measures the communication amount per unit time of information input for each computer 20. The temperature sensor 21 measures the maximum temperature within a predetermined time range of the computer 20 that has generated heat by performing processing according to the information. The measured maximum temperature is stored as a set with the communication volume. The maximum of the predetermined time is the time until the air conditioner 30 responds to the reaction of the temperature sensor 21.

The updating unit 42b displays on the scatter diagram a distribution in which the communication amount measured as described above for a certain period of time is associated with the temperature increase amount of the computer 2 according to the maximum temperature stored in the set.
Specifically, the temperature increase amount of the computer 2 according to the maximum temperature can be, for example, an increase amount from the temperature at the time of communication amount measurement to the maximum temperature.
The correlation calculation unit 42c obtains an approximate curve of the communication amount and the temperature rise amount with respect to the communication amount from the distribution information displayed on the scatter diagram, for example, by the least square method (this is assumed as initial learning data M1). . The approximate curve is, for example, a straight line represented by a linear function in FIG. Further, it is assumed that the control amount of the air conditioner 30 for the temperature rise is acquired during the operation of the air conditioner 30. The distribution information and the approximate curve displayed on the scatter diagram are held in the communication amount temperature distribution database 41.

[Step S2]
The update unit 42b updates the distribution information of the communication amount temperature distribution database 41 every time the communication amount and the temperature increase amount are notified from the reception measurement unit 42a. In addition, the reception measurement unit 42a measures a delay time until the temperature increase amount is received after the communication amount is received. Furthermore, the correlation calculation unit 42c updates the correlation information in the updated communication volume temperature distribution database 41. Details of the process in step S2 will be described later.

[Step S3]
The cooling amount calculation unit 43a calculates the predicted temperature increase amount from the correlation function approximated from the distribution information of the communication amount and the temperature increase amount with respect to the communication amount measured in step S2. The cooling amount calculation unit 43a calculates an air blowing amount for cooling the computer 20 according to the calculated predicted temperature increase amount.

[Step S4]
The instruction time calculation unit 43b calculates the timing (instruction time) for adding the air flow calculated in step S3 from the distribution information held in the communication amount temperature distribution database 41 and the temperature rise characteristic of the computer 20. Details of the process in step S4 will be described later.

[Step S5]
The control unit 44 gives a cooling instruction to the air conditioner 30 that performs normal cooling so as to cool by adding the air volume calculated in step S3. Moreover, the timing which adds the ventilation volume calculated by step S3 is adjusted based on the instruction | indication time calculated by step S4.

Then, the update process of the communication amount temperature distribution database 41 performed at step S2 is demonstrated.
FIG. 9 is a flowchart illustrating a processing procedure for updating the communication temperature distribution database by the air conditioning control device according to the first embodiment.

[Step S2a]
The communication amount measuring device 50 measures the communication amount input to the computer 20.
[Step S2b]
The cooling amount calculation unit 43a uses the initial learning data M1 in step S1, and calculates the blown air amount according to the temperature increase amount predicted from the communication amount measured in step S2a. The controller 44 adds the amount of air calculated by the cooling amount calculator 43a to the amount of air obtained by the normal control shown in FIG. Note that the control error caused by the variation between the communication amount measured in this state and the temperature rise amount with respect to the communication amount is alleviated by the normal air conditioning control loop of the control unit 44.

[Step S2c]
The temperature sensor 21 measures the temperature of the computer 20 that is cooled by the air conditioner 30 to which the calculated blast volume is added. It should be noted that the temperature rise measured in step S2c with respect to the communication volume measured in step S2a is less than the temperature rise in the initial learning data M1. That is, the temperature increase measured in the n-th step S2c is less than the temperature increase in the learning data Mn-1.

[Step S2d]
As described in step S2c, since the temperature rise is smaller than the initial learning data M1, the temperature rise in the initial learning data M1 is corrected. The learning data M2 is obtained by adding a correction amount ΔM to the initial learning data M1. Thereafter, the n-th learning data Mn can be expressed as Mn = Mn−1 + ΔM. If the communication amount and the temperature increase amount (the calculation load that is the basis) have some correlation, the learning data stability is improved by increasing the learning amount according to the law of large numbers. The temperature rise correction amount ΔM may be, for example, an average value of the temperature rise amount in the initial learning data M1 and the temperature rise amount measured in step S2c. Alternatively, the correction amount ΔM may be determined using the correlation curve of the initial learning data M1 from the cooling amount in step S2b and the temperature increase amount in the initial learning data M1.

[Step S2e]
The update unit 42b registers the communication amount measured in step S2a and the temperature increase amount corrected in step S2d in the communication amount temperature distribution database 41, and updates the distribution information.

[Step S2f]
The correlation calculation unit 42c newly calculates a correlation curve from the updated distribution information, and the next process proceeds to step S2a.

  The above steps S2a to S2f are repeated n times, the distribution information in the communication temperature distribution database 41 is updated, and the stability of the learning data is improved. However, as described above, the information received by the computer 20 is either instruction information for performing the calculation or information necessary for the calculation. Therefore, there is indefiniteness of the information, and the measurement point is unique. Never converge.

Subsequently, the details of the calculation process of the blowing temperature performed in step S4 will be described with reference to the flowchart of the processing procedure together with specific data.
FIG. 10 is a flowchart illustrating a processing procedure for calculating an instruction time by the air conditioning control device according to the first embodiment.

[Step S4a]
The instruction time calculation unit 43b refers to the communication amount temperature distribution database 41 and calculates a variation in the temperature increase amount with respect to the communication amount of the information received by the computer 20 acquired in step S2.

  By calculating the variation of the temperature rise amount, in each computer 20, for example, as shown in FIG. 6, the predicted temperature rise amount and the maximum value (maximum temperature rise amount) from the linear function with respect to the communication amount set in step S4a. Is obtained.

[Step S4b]
The instruction time calculation unit 43b calculates the temperature width by taking the difference between the maximum value of the variation in the temperature increase calculated in step S4a and the predicted temperature increase corresponding to the communication amount.

  For example, in the computer 20a of FIG. 7, the temperature range when the communication amount is 10 (packet / second) is calculated as Tmax1-T1. Similarly, for other communication amounts, the temperature range is calculated based on the difference between the maximum value and the predicted temperature increase amount.

[Step S4c]
The instruction time calculation unit 43b calculates the instruction time by dividing the temperature range calculated in step S4b by the temperature rise characteristic of the computer 20.

  For example, when the temperature rise characteristic of the computer 20a in FIG. 7 is α (° C./min), the instruction time t1 when the communication amount is 10 (packet / second) is (Tmax1-T1) / α. Calculated. For other communication amounts, the instruction time is similarly calculated by dividing the temperature range by the temperature rise characteristic.

[Step S4d]
The instruction time calculation unit 43b determines whether or not the distribution information has been updated within a predetermined range of the traffic, and if within the range, notifies the calculated instruction time to the control unit 44 and ends the process. Then, the next process proceeds to step S5. If not within the range, the next process proceeds to step S4a, and the distribution information is updated.

  The process after step S5 is advanced to step S2, the communication amount of the computer 20 cooled by the air conditioner 30 and the temperature rise corresponding to the communication amount are measured again, and the processes in steps S3 to S5 are respectively performed. Done again.

  Thus, after the process of step S1, the process of steps S2-S5 is repeatedly performed, and while the temporary temperature rise of the computer 20 is suppressed, the air conditioner 30 is controlled according to the temperature change of the computer 20. Then, the computer 20 is cooled.

  In step S2, if the communication amount is not measured for a predetermined time, the control of the air conditioner 30 according to the communication amount of the present embodiment is stopped, and only the cooling of the air conditioner 30 to the computer 20 is performed. You may make it. Or you may make it complete | finish the process by FIG.

Another method for calculating the instruction time will be described.
FIG. 11 is a diagram for explaining an example of data related to a temperature rise amount with respect to a communication amount.
FIG. 11 shows various values of the temperature rise amount with variations with respect to the communication amount of 50 (packets / second) in FIG. That is, the minimum value is the minimum temperature increase, the average value (A) is the average temperature increase between the maximum and minimum values, and the standard deviation is the standard temperature increase when the communication volume is 50 (packets / second). Deviation. Further, the maximum value and the predicted temperature rise amount are as described above, and the temperature rise characteristic of the computer 20 is also 10 ° C./min.

  In the above case, the instruction time is calculated as (maximum value−predicted temperature rise amount) / temperature rise characteristic = 0.612 seconds. Therefore, in this case, the air flow rate is added to the air conditioner 30 0.612 seconds before the temperature rise amount predicted by the computer 20 is reached.

  Apart from this, a value obtained by adding a standard deviation to the average value may be adopted as the instruction time. In this case, the value in FIG. 11 is substituted into (A + σ−predicted temperature rise amount) / temperature rise characteristic to obtain 0.499 seconds as the instruction time.

  Thus, after the process of step S1 by the air-conditioning control apparatus 40, the process of steps S2-S5 is repeatedly performed, and the temporary temperature rise of the computer 20 is suppressed. For this reason, the power consumption of the computer 20 and the fall of the calculation performance of the computer 20 can be suppressed. Moreover, since the air conditioner 30 is operated based on the predicted value of the temperature rise amount of the computer 20, excessive air conditioning is not performed, and the power consumption of the air conditioner 30 can be suppressed. Furthermore, since the amount of communication is used to predict the amount of temperature rise due to the computational load of the computer 20, it is necessary to maintain the confidentiality of information (data), obtain the data itself, and analyze the computational load. No.

Next, another embodiment using the above embodiment will be described.
[Second Embodiment]
In the above embodiment, the description is limited to the case where the temperatures of all the computers 20 change uniformly. 2nd Embodiment demonstrates the case where the temperature of all the computers 20 does not change uniformly.

  FIG. 12 is a diagram for explaining a control method of the air-conditioning control apparatus according to the second embodiment. In the air conditioning system 10 of FIG. 12, the illustration of the temperature sensor 21, the rack 22, the air conditioning control device 40, and the communication amount measuring device 50 is omitted in FIG. In FIG. 12, a graph representing variations in the temperature of the computer 20 and the cooling amount (air flow rate) of the air conditioner 30 is also shown.

  In general, the cooling capacity of the air conditioner 30 decreases as the distance from the air conditioner 30 increases. Further, as described above, the amount of heat generated by the computer 20 increases as the calculation load increases. For example, as shown in FIG. 12, the computers 20 a to 20 d are arranged from the vicinity of the air conditioner 30 in the order of high calculation performance that can withstand a large calculation load. The air conditioning control device 40 controls the cooling of the air conditioning device 30 so as to cool it by adding an air flow amount corresponding to the predicted temperature increase amount of the computer 20a. The air conditioner 30 can cool the computer 20 with the air flow indicated by the broken line.

  However, when the calculation load is temporarily concentrated on the computers 20b and 20d, the amount of heat generated by the computers 20b and 20d increases. If the increased heat generation amount exceeds the air blowing amount of the air conditioner 30 indicated by the broken line, the computing performance of the computers 20b and 20d is deteriorated without cooling the computers 20b and 20d.

  Therefore, when the air conditioner control device 40 detects that the temperature of the computers 20b and 20d exceeds the air flow rate of the air conditioner 30 by the temperature sensor 21, the communication amount and the temperature increase amount of the computer 20b having the maximum temperature are measured. Using the value distribution information and a linear function approximated from the distribution information, the amount of air blown to cool the computer 20b is calculated at the arrangement position of the computer 20b. The air conditioning control device 40 increases the air flow rate from the air conditioner 30 so that the air flow rate indicated by the solid line in FIG. In this way, it is possible to suppress a decrease in the calculation performance of all the computers 20.

[Third Embodiment]
In the above-described embodiment, the case where the temperature rise characteristic of the computer 20 is constant has been described.

However, the temperature rise characteristics of the computer 20 may vary depending on the environment. This case will be described in the third embodiment.
FIG. 13 is a flowchart illustrating a processing procedure for calculating an instruction time by the air-conditioning control apparatus according to the third embodiment. The same processes as those in the flowchart of FIG.

[Step S4a]
The instruction time calculation unit 43b refers to the communication amount temperature distribution database 41 and calculates a variation in the temperature increase amount with respect to the communication amount of the information received by the computer 20 acquired in step S2.

  By calculating the variation in the temperature increase amount, in each computer 20, for example, as shown in FIG. 6, the predicted temperature increase amount and the maximum value (maximum temperature increase amount) of the linear function with respect to the communication amount set in step S4a. Is obtained.

[Step S4a1]
The temperature rise characteristic of the computer 20 is calculated by dividing the predicted temperature rise amount obtained in step S4a by the delay time measured by the reception measurement unit 42a in step S2. Note that the maximum value of the temperature increase amount may be used instead of the predicted temperature increase amount.

[Step S4b]
The instruction time calculation unit 43b calculates the temperature width by taking the difference between the maximum value of the variation in the temperature increase calculated in step S4a and the predicted temperature increase corresponding to the communication amount.

[Step S4c]
The instruction time calculation unit 43b calculates the instruction time by dividing the temperature range calculated in step S4b by the temperature rise characteristic of the computer 20 calculated in step S4a1.

[Step S4d]
The instruction time calculation unit 43b determines whether or not the distribution information has been updated within a predetermined range of the traffic, and if within the range, notifies the calculated instruction time to the control unit 44 and ends the process. Then, the next process proceeds to step S5. If not within the range, the next process proceeds to step S4a, and the distribution information is updated.

  The process after step S5 is advanced to step S2, the communication amount of the computer 20 cooled by the air conditioner 30 and the temperature rise corresponding to the communication amount are measured again, and the processes in steps S3 to S5 are respectively performed. Done again.

Through the processing as described above, the instruction time can be calculated every time the communication amount and the temperature increase amount are measured even if the temperature increase characteristic of the computer 20 varies.
The above processing functions can be realized by a computer. In that case, a program describing the processing contents of the functions that the air conditioning control device 40 should have is provided. By executing the program on a computer, the above processing functions are realized on the computer. The program describing the processing contents can be recorded on a computer-readable recording medium. Examples of the computer-readable recording medium include a magnetic recording device, an optical disk, a magneto-optical recording medium, and a semiconductor memory. Examples of the magnetic recording device include a hard disk device (HDD), a flexible disk (FD), and a magnetic tape. Examples of the optical disc include a DVD (Digital Versatile Disc), a DVD-RAM, a CD-ROM (Compact Disc Read Only Memory), and a CD-R (Recordable) / RW (ReWritable). Examples of the magneto-optical recording medium include an MO (Magneto-Optical disk).

  When distributing the program, for example, a portable recording medium such as a DVD or a CD-ROM in which the program is recorded is sold. It is also possible to store the program in a storage device of a server computer and transfer the program from the server computer to another computer via a network.

  The computer that executes the air conditioning control program stores, for example, a program recorded on a portable recording medium or a program transferred from a server computer in its own storage device. Then, the computer reads the program from its own storage device and executes processing according to the program. The computer can also read the program directly from the portable recording medium and execute processing according to the program. Further, each time the program is transferred from the server computer, the computer can sequentially execute processing according to the received program.

(Supplementary note 1) In an air conditioning control device that controls an air conditioning device that cools a computer,
Distribution information holding means for holding distribution information in which the communication amount of the computer and the temperature increase amount of the computer until a predetermined time elapses after the communication amount is measured;
Based on the distribution information, a predicted value of the temperature rise amount corresponding to the communication amount newly measured by the traffic amount measuring unit that measures the communication amount is obtained and measured by the predicted value of the temperature rise amount and the temperature measuring unit. Arithmetic control means for giving a cooling control instruction to the air conditioner with a cooling amount determined based on the actual temperature of the computer;
The air-conditioning control apparatus characterized by having.

  (Additional remark 2) From the temperature at the time of the said communication amount measurement to the maximum temperature measured by the said temperature measurement means after the said traffic measurement means measures a communication amount and until the said predetermined time passes. The distribution information update means for updating the distribution information by causing the distribution information holding means to hold the temperature increase amount as the temperature increase amount in association with the measured communication amount, and further updating the distribution information. Air conditioning control device.

  (Supplementary Note 3) The distribution information update unit corrects the temperature increase amount corresponding to the measured communication amount by adding a correction amount, and adds the corrected temperature increase amount to the distribution information and updates the distribution information. The air conditioning control device according to appendix 2, characterized by:

(Appendix 4) The correction amount is
The temperature increase measured by the temperature measuring means;
Based on the distribution information to which the measured temperature rise amount is added, the arithmetic control means performs the cooling control instruction to the air conditioner, and the temperature rise amount newly measured by the temperature measuring means, The air conditioning control device according to supplementary note 3, wherein the air conditioning control device is an average value of.

(Additional remark 5) The said calculation control means is
Calculate a correlation function indicating a correlation between the communication amount and the temperature increase amount based on the distribution information,
Based on the difference between the predicted value of the temperature increase obtained from the correlation function and the maximum value of the temperature increase obtained from the distribution information for the communication amount measured by the communication amount measuring means,
Calculating an instruction time indicating a time to cool the computer to the air conditioner;
The air-conditioning control apparatus according to appendix 1, characterized by:

  (Additional remark 6) The said calculation control means calculates the said instruction | indication time by remove | dividing the difference of the said maximum value and the said predicted value by the temperature rise characteristic showing the temperature rise amount per unit time of the said computer. The air conditioning control device according to appendix 5, characterized by:

(Supplementary Note 7) The calculation control means includes:
Measuring the predetermined time from when the communication amount measuring unit measures the communication amount until the temperature measuring unit measures the temperature increase amount,
By dividing the predicted value by the predetermined time measured by the time measuring means, the fluctuating temperature rise characteristic is calculated.
The air-conditioning control apparatus according to appendix 6, characterized by:

(Appendix 8) A plurality of computers cooled by the air conditioner are installed,
The distribution information holding means holds the distribution information for each of the plurality of computers,
Based on the predicted value of the temperature rise obtained based on the distribution information of the computer having the highest actual temperature measured by the temperature measuring unit and the actual temperature, the arithmetic control unit controls the air conditioner. The air conditioning control device according to appendix 1 or 2, wherein the cooling control instruction is performed.

(Supplementary Note 9) In an air conditioning control method for controlling an air conditioner that cools a computer,
Distribution information holding means holds distribution information in which the communication amount of the computer is associated with the temperature increase amount of the computer until a predetermined time elapses after the communication amount is measured,
The calculation control means obtains a predicted value of the temperature rise amount corresponding to the communication amount newly measured by the communication amount measuring means for measuring the communication amount based on the distribution information, and the predicted value of the temperature rise amount and the temperature A cooling control instruction is given to the air conditioner with a cooling amount determined based on the actual temperature of the computer measured by the measuring means.
The air-conditioning control method characterized by the above-mentioned.

(Supplementary Note 10) In an air conditioning control program for controlling an air conditioner that cools a computer,
Computer
Distribution information holding means for holding distribution information in which the communication amount of the computer is associated with the temperature increase amount of the computer until a predetermined time elapses after the communication amount is measured;
Based on the distribution information, a predicted value of the temperature rise amount corresponding to the communication amount newly measured by the traffic amount measuring unit that measures the communication amount is obtained and measured by the predicted value of the temperature rise amount and the temperature measuring unit. Arithmetic control means for giving a cooling control instruction to the air conditioner with a cooling amount determined based on the actual temperature of the computer;
An air conditioning control program characterized by functioning as

DESCRIPTION OF SYMBOLS 1,10 Air-conditioning system 2,20,20a, 20b, 20c, 20d Computer 3,30 Air-conditioner 4,40 Air-conditioning controller 4a Distribution information holding part 4b Arithmetic control means 4c Distribution information update means 5 Communication volume measurement means 6 Temperature Measuring means 21, 21a, 21b, 21c, 21d Temperature sensor 22 Rack 40a CPU
40b RAM
40c HDD
40d Graphic processing device 40e Input interface 40f Communication interface 40g Bus 41 Communication volume temperature distribution database 42 Creation section 42a Acceptance measurement section 42b Update section 42c Correlation calculation section 43 Calculation section 43a Cooling amount calculation section 43b Instruction time calculation section 44 Control section 50 Communication Quantity measuring device 101 Monitor 102 Keyboard 103 Mouse A Temperature B Cooling amount C Distribution information D Communication amount E Predicted temperature rise F Cooling amount G Timing adjustment

Claims (5)

In the air conditioning control device that controls the air conditioning device that cools the computer,
Distribution information holding means for holding distribution information in which the communication amount of the computer and the temperature increase amount of the computer until a predetermined time elapses after the communication amount is measured;
Based on the distribution information, a predicted value of the temperature rise amount corresponding to the communication amount newly measured by the traffic amount measuring unit that measures the communication amount is obtained and measured by the predicted value of the temperature rise amount and the temperature measuring unit. Arithmetic control means for giving a cooling control instruction to the air conditioner with a cooling amount determined based on the actual temperature of the computer;
The air-conditioning control apparatus characterized by having.   The amount of increase from the temperature at the time of measuring the communication amount up to the maximum temperature measured by the temperature measuring unit between the time when the communication amount measuring unit measures the communication amount and the predetermined time elapses. The air-conditioning control apparatus according to claim 1, further comprising a distribution information update unit that updates the distribution information by causing the distribution information holding unit to hold the temperature increase amount in association with the measured communication amount. . A plurality of computers cooled by the air conditioner are installed,
The distribution information holding means holds the distribution information for each of the plurality of computers,
Based on the predicted value of the temperature rise obtained based on the distribution information of the computer having the highest actual temperature measured by the temperature measuring unit and the actual temperature, the arithmetic control unit controls the air conditioner. The air conditioning control device according to claim 1 or 2, wherein the cooling control instruction is performed. In an air conditioning control method for controlling an air conditioner that cools a computer,
Distribution information holding means holds distribution information in which the communication amount of the computer is associated with the temperature increase amount of the computer until a predetermined time elapses after the communication amount is measured,
The calculation control means obtains a predicted value of the temperature rise amount corresponding to the communication amount newly measured by the communication amount measuring means for measuring the communication amount based on the distribution information, and the predicted value of the temperature rise amount and the temperature A cooling control instruction is given to the air conditioner with a cooling amount determined based on the actual temperature of the computer measured by the measuring means.
The air-conditioning control method characterized by the above-mentioned. In the air conditioning control program that controls the air conditioner that cools the computer,
Computer
Distribution information holding means for holding distribution information in which the communication amount of the computer is associated with the temperature increase amount of the computer until a predetermined time elapses after the communication amount is measured;
Based on the distribution information, a predicted value of the temperature rise amount corresponding to the communication amount newly measured by the traffic amount measuring unit that measures the communication amount is obtained and measured by the predicted value of the temperature rise amount and the temperature measuring unit. Arithmetic control means for giving a cooling control instruction to the air conditioner with a cooling amount determined based on the actual temperature of the computer;
An air conditioning control program characterized by functioning as

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