KR20130005492A - Method, apparatus and system for controlling server by changing power mode - Google Patents

Abstract

PURPOSE: Server control method, apparatus and a system using power mode switching are provided to predict and prepare for future traffic quantity based on traffic quantity history, thereby guarantee request process performance for servers. CONSTITUTION: Power consumption estimator(210) measures traffic quantity of servers, and estimates power consumption of the servers. Power mode determining cycle setting unit(230) compares the estimated power consumption and generated power consumption history by estimating the power consumption at fixed time interval, and decides power mode determination period of the servers. Power mode determiner(250) estimates power consumption of the servers at the power mode determination period, selects server in which the power mode has to be switched, and determines power mode of the server. [Reference numerals] (210) Power consumption estimator; (220) Power consumption DB; (230) Power mode determining cycle setting unit; (240) Server DB; (250) Power mode determining unit; (270) Control unit; (AA) Inputting traffic volumes of a server; (BB) Outputting a control signal

Description

Server control method, server control device and server control system using power mode conversion {METHOD, APPARATUS AND SYSTEM FOR CONTROLLING SERVER BY CHANGING POWER MODE}

The present invention relates to a server control method, a server control apparatus, and a server control system using power mode conversion, and more particularly, to a technology for dynamically controlling a power mode of a server.

Data centers are so power-hungry that they are called "electric hippos." Servers account for 80 percent of the power consumption of data center IT equipment, and lowering it is critical for green IT. One way to solve this problem is to implement and use a load balancer that turns off some servers for some time, if necessary, in order to minimize server power consumption.

You can consider Linux virtual servers as a common load balancer. Linux Virtual Server (LVS: Linux Virtual Server) provides excellent scalability and availability by configuring multiple independent servers in a cluster based on Linux. The structure of the virtual server makes the cluster server appear to be a high performance server outside the server, and the user's request is processed using scheduling inside the actual server.

LVS has three methods (NAT: Network Address Translation, Direct Routing, and IP Tunneling) according to the method of processing a request received from a client. This method can be divided into a method of transmitting a server-processed request to a user through LVS (NAT) and a method of directly sending a server to a user (Direct Routing, IP Tunneling).

In addition, LVS has eight methods depending on how user requests are scheduled to real servers: Round-Robin, WRR: Weighted Round-Robin, LC: Least Connection, WLC: Weighted Least Connection, LBLC: Locality-Based Least Connection , LBLCR: Locality-Based Least Connection with Replication, SH: Source Hash, DH: Destination Hash). Scheduling method is to distribute requests to real servers in order, to distribute them in order (RR, WRR), to distribute using the number of connections between virtual servers and real servers (LC, WLC), The method can be divided into a method of grouping and distributing units (LBLC, LBLCR) and a method using hashes (SH, DH).

The server power control system according to the conventional method includes changing the configuration of the load balancer when the traffic measuring module for measuring load of a plurality of servers connected to the load balancer and the total load applied to the plurality of servers decreases below a preset threshold. It includes a traffic control module that prevents load distribution to any one server in a predetermined order among the running server. The apparatus may further include a server power control module configured to generate a server termination signal for the server when the traffic of the server whose load is prevented from being distributed by the traffic control module falls below a preset threshold.

However, the conventional server power control system controls power only in a predetermined order without considering the situation of the server at the time of on / off, so it is not possible to guarantee the overall performance of the server, and to deal with the situation considering only the current situation. Because of this, it is impossible to predict and cope with the future situation, and there is a problem in that it is insufficient to cope with sudden spikes (DDoS) and sudden drops in requests.

The technical problem to be achieved by the present invention is a server control method, a server control device and a server using a power mode conversion to switch the power mode by periodically or aperiodically monitoring the traffic volume of the server in controlling the power of a plurality of servers It is to provide a control system.

According to an embodiment of the present invention, a server control method using power mode conversion includes estimating power consumption of a plurality of servers by measuring traffic amounts of a plurality of servers, and estimated power consumption of the plurality of servers. Comparing the power consumption history generated by estimating the power consumption at predetermined time intervals, setting power mode determination periods of the plurality of servers, and power consumption of the plurality of servers at each power mode determination period. Estimating, selecting a server to which a power mode is to be converted, determining a power mode of the selected server, and controlling a power operation of the selected server according to the determined power mode.

The power mode may include an on mode for supplying power to the server, an off mode for shutting off power supplied to the server, and a sleep mode for temporarily shutting off power supplied to the server.

The setting of the power mode determination periods of the plurality of servers may include comparing the power consumption of the server estimated at a first time point with the power consumption of the server estimated at a second time point, and the difference in power consumption may be determined in advance. If it is greater than a predetermined minimum power consumption threshold and less than a predetermined maximum power consumption threshold, the server's power consumption estimated at the second time point and the power consumption history of the server estimated at a third time in the past are estimated. By comparing power consumption, when the difference in power consumption is greater than a predetermined determination period determination value, the power mode determination period may be set short, and when the difference of power consumption is smaller than the determination period determination value, the power mode determination period may be set longer. .

In addition, the power consumption of the server estimated at the first time point and the power consumption of the server estimated at the second time point are compared, or the difference in power consumption is smaller than the minimum power consumption threshold, or the maximum power consumption. If it is larger than the threshold value, the power mode determination period may be set to the minimum.

In the determining of the power mode of the selected server, the power mode of the plurality of servers may be determined by calculating the number of servers according to the traffic amount at each set power mode determination period.

In addition, when the number of servers calculated at the start of the power mode determination period is greater than the number of servers calculated at the end of the power mode determination cycle, the server operating in the on mode may be converted into an off mode or a sleep mode. have.

In addition, the server which is converted into the off mode or the sleep mode may determine the least traffic in the server operating in the on mode.

In addition, when the power mode determination period is greater than a predetermined determination period threshold, the server operating in the on mode may be converted to the off mode, and when the power mode determination period is smaller than the threshold, the sleep mode may be converted into a sleep mode.

In addition, when the number of servers calculated at the start of the power mode decision period is less than the number of servers calculated at the end of the power mode decision period, the power is turned off when the power mode decision period is larger than a predetermined decision period threshold. The server operating in the mode may be converted into the on mode, and when the server is smaller than the threshold value, the server operating in the sleep mode may be converted into the on mode.

The controlling may include distributing a connection request for a server operating in the on mode to another server operating in the on mode when the plurality of servers operating in the on mode are converted into an off mode or a sleep mode. When the plurality of servers operating in the sleep mode or the off mode are converted to the on mode, the controller may control the distribution of connection requests to other servers operating in the on mode to the server converted to the on mode.

According to another aspect of the present invention, a server control apparatus using power mode conversion includes: a power consumption estimator for estimating power consumption of a plurality of servers by measuring traffic amounts of a plurality of servers; A power mode determination cycle setting unit configured to set power mode determination cycles of the plurality of servers by comparing power consumption and power consumption history generated by estimating the power consumption at a predetermined time interval, and for each of the predetermined power mode determination cycles; A power mode determination unit for selecting a server to which a power mode is to be converted and estimating power consumption of the plurality of servers, and controlling a power operation of the selected server according to the determined power mode; It includes a control unit.

According to another aspect of the present invention, a server control system using power mode conversion includes a plurality of servers, a plurality of client terminals requesting a connection to the plurality of servers, and a plurality of servers to measure traffic volume of the plurality of servers. A power consumption mode of the plurality of servers by comparing a power consumption estimating unit estimating power consumption of a server with power consumption history generated by estimating the power consumption at a predetermined time interval with the estimated power consumption of the plurality of servers; A power mode determination period setting unit configured to set a determination period, estimate a power consumption of the plurality of servers at each of the set power mode determination periods, select a server to which a power mode is to be converted, and determine a power mode of the selected server; A power mode determination unit configured to control a power operation of the selected server according to the determined power mode. Included includes a server control device using power mode conversion.

The server control method, the server control device and the server control system using the power mode conversion according to the present invention can control the power mode of the server in consideration of the traffic situation, and can cope with sudden spikes (DDoS) and sudden drop of request Can be. In addition, power consumption can be expected by maintaining the appropriate number of servers according to the traffic conditions of the network, and the request processing performance of the servers can be guaranteed by predicting and preparing for future traffic based on past traffic volume details.

1 is a configuration diagram of a server control system using power mode conversion according to an embodiment of the present invention;
2 is a configuration diagram of a server control apparatus using power mode conversion included in the server control system according to FIG. 1;
3 is a flowchart of a server control method using power mode conversion according to FIG. 2;
4A and 4B are exemplary diagrams for describing setting of a power mode determination period according to FIG. 3.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The terms used are terms selected in consideration of the functions in the embodiments, and the meaning of the terms may vary depending on the user, the intention or the precedent of the operator, and the like. Therefore, the meaning of the terms used in the following embodiments is defined according to the definition when specifically defined in this specification, and unless otherwise defined, it should be interpreted in a sense generally recognized by those skilled in the art.

1 is a block diagram of a server control system using power mode conversion according to an embodiment of the present invention.

Referring to FIG. 1, a server control system using power mode conversion includes a plurality of client terminals 100, a server control apparatus 200, and a plurality of servers 300. The plurality of client terminals 100 request a connection to the plurality of servers 300 through the network. A network is formed between the plurality of client terminals 100 and the plurality of servers 300 to generate traffic in the process of transmitting data. In this case, the server control apparatus 200 receives a connection request to the server 300 from the client terminal 100 to distribute the load to the plurality of servers 300 and at the same time to power the plurality of servers 300 individually To control. The server control apparatus 200 estimates the power consumption by measuring the amount of traffic generated by each server 300, and controls the power mode of the specific server 300 in the on / off / sleep mode based on this.

Hereinafter, a server control apparatus and a server control method included in a server control system will be described later with reference to FIGS. 2 to 3.

FIG. 2 is a configuration diagram of a server control apparatus using power mode conversion included in the server control system of FIG. 1, and FIG. 3 is a flowchart of a server control method using power mode conversion according to FIG. 2.

The server control apparatus 200 using the power mode conversion includes the power consumption estimation unit 210, the power consumption DB 220, the power mode determination period setting unit 230, the server DB 240, and the power mode determination unit 250. And a control unit 270. First, the power consumption estimator 210 estimates power consumption of a plurality of servers by measuring traffic amounts of the plurality of servers from the client terminal 100 (S300). The power consumption estimator 210 stores the average data of power consumption for each server in the power consumption DB 220 for a preset time. The power consumption DB 220 may store data as shown in Table 1 below.

Point of view server First server Second server Control server Total power consumption First point in time 30 W 25 W ... 50W 250 W Second time point 50W 10 W ... 30 W 220 W : : : : : : Nth point in time 40W 50W ... 50W 300 W

The power consumption DB 220 stores power consumption history for each server and power consumption of the entire server, as shown in Table 1 below. The power consumption estimator 210 estimates power consumption by measuring traffic amounts for a plurality of servers at predetermined time periods under the control of the power mode determination period setting unit 230 and stores the power consumption in the power consumption DB 220. . The average data of power consumption stored in the power consumption DB 220 is used by the power mode determination period setting unit 230.

Next, the power mode determination period setting unit 230 estimates and generates the power consumption of the plurality of servers estimated by the power consumption estimator 210 at predetermined time intervals stored in the power consumption DB 220. Compared to the consumed power history, the power mode determination period of the plurality of servers is set (S310). The power mode determination period setting unit 230 may adjust the period by increasing or decreasing the power mode determination period of the plurality of servers according to the history of power consumption data for the plurality of servers stored in the power consumption DB 220. The power mode determination period is a time period for determining whether the power mode of each server is changed. That is, the average value between the previous time point and the current time point at a preset time interval is estimated as power consumption for a plurality of servers. The data set by the power mode determination period setting unit 230 is stored in the power consumption DB 220 as data shown in Table 2 below, and the history thereof is updated.

Total power consumption Current Power Mode Determination Cycle Estimated Power Mode Determination Cycle First point in time 380 W 20 sec 20 sec Second time point 500 W 20 sec 15 sec Third time point 300 W 15 sec 25 sec : : : :

For example, power consumption may be estimated by dividing one hour into three viewpoints in units of 20 minutes. In this case, the first time point is '1:20, 2:20, 3:20'. ', The power consumption is estimated, and the second time point is '40: 40, 2:40, 3:40... ', The power consumption is estimated, and the third time point is' 2, 3, 4 o'clock. ', The power consumption can be estimated. In this case, an exceptional power consumption value between the average power consumption between 1: 1 and 1:20 and the value of the past first point in time stored in the power consumption DB 200 (updated at 12:20) is exceptional. The representative value, which is an average value of values excluding high or small power consumption values, is updated in the power consumption DB 200 with the first time point value, and the average power consumption and the power consumption DB between 1:21 and 1:40 ( Representative values between the values of the past second time point (stored at 12:40) stored in the 200) are updated to the second time point value in the power consumption DB 200, and between 1:41 and 2 o'clock. The representative value between the average power consumption and the value of the past third time point (value updated at 1 o'clock) stored in the power consumption DB 200 is updated in the power consumption DB 200 with the third time point value.

For example, when the current time is 1:20, the power mode determination period setting unit 230 may include an average of power consumption between 1: 1 and 1:20 and second past power stored in the power consumption DB 200. Depending on the degree of difference in power consumption between the values at the time point (the value updated at 12:40), the shorter the power mode decision period is set as the difference is larger than the predetermined determination period determination value, and the difference is the determination period determination value. The smaller value lengthens the power mode decision cycle. In this way, a time interval (time interval between the first time point and the second time point) for setting a power mode decision cycle of the server is periodically set, and a power mode decision cycle for determining whether the power mode is switched for an individual server. Is variable depending on the situation. Therefore, by actively adjusting the power supply mode decision period based on the current traffic situation and the predicted future traffic condition, the optimal number of servers can be maintained in the current traffic condition. Through this, it is possible to ensure the performance of the server in response to the client's request, and to reduce the power consumption.

On the other hand, the method of setting the power mode determination period in the power mode determination period setting unit 230 may be divided into a general case and an exceptional case. The power mode determination period setting unit 230 compares the power consumption of the server estimated at the first time point with the power consumption of the server estimated at the second time point, and compares the difference in power consumption with a preset minimum power consumption threshold. Identifies whether the traffic situation is general or exceptional. The maximum power consumption threshold is a reference value for determining an exceptional request surge (DDos), and the minimum power consumption threshold is a reference value for determining a sudden drop in an exceptional request. If the difference in power consumption is larger than the minimum power consumption threshold and smaller than the maximum power consumption threshold, the traffic situation is determined as a general case, and the past power among the power consumption and power consumption history of the server estimated at the second time point is determined. If the difference in power consumption is greater than the predetermined determination period determination value, set the power mode determination period to be short, and if the difference in power consumption is smaller than the determination period determination value, The power mode decision cycle can be set long. In this case, the determination period determination value is a reference value for increasing or decreasing the power mode determination period, and the value is variable by the user's setting. Accordingly, the power supply mode determination period can be set in advance by predicting the increase or decrease in power consumption.

On the other hand, the power mode determination period setting unit 230 compares the power consumption of the server estimated at the first time point and the power consumption of the server estimated at the second time point, the minimum power consumption threshold value is a predetermined difference in power consumption If it is smaller or if the difference in power consumption is larger than the preset maximum power consumption threshold, it is determined as an exceptional case. If the difference in power consumption is judged to be a sudden increase or decrease in exceptional requests, the power mode decision cycle is set to a minimum, and in the case of a sudden increase in exceptional requests, the number of servers can be quickly increased to ensure response performance. In the case of a sudden drop in exceptional requests, power savings can be expected by quickly switching the server mode to off or sleep mode.

Next, the power mode determination unit 250 determines the server to which the power mode should be converted and the power mode of the server by using the power consumption of the plurality of servers estimated according to the traffic amount at each set power mode determination period ( S320). The power mode determination unit 250 sets the minimum number of servers required by referring to the power consumption of the plurality of servers stored in the power consumption DB 220, and sets the power mode determination period set by the power mode determination period setting unit 230. Each time, the minimum number of servers required is calculated by referring to the power consumption of a plurality of servers. Then, the power mode of the plurality of servers is determined by comparing the number of servers according to the power consumption of each cycle.

In addition, the power mode determination unit 250 compares the number of first servers calculated at the start of the power mode determination cycle with the number of second servers calculated at the end of the power mode determination cycle, so that the number of second servers is determined by the first server. If the number is less than the number, the server operating in the on mode is switched to the off mode or the sleep mode, and if the number of the second servers is greater than the number of the first server, the server operating in the off mode or the sleep mode is converted to the on mode. In this case, the power mode of the server includes an on mode for supplying power of the server, an off mode for shutting off the power of the server, and a sleep mode for temporarily shutting off the power of the server. The sleep mode does not completely shut down the server, but consumes about 10% of the power in the on mode, and the connection with the client terminal 100 is released. Compared to simply setting the server's power mode to the on mode / off mode, when the sleep mode is set, switching to the on mode can be performed quickly.

In addition, when the power consumption for the servers decreases as the overall network traffic decreases, when the current power mode determination period is set longer than the average power mode determination period, the server operating in the on mode is converted to the off mode. If the current power mode determination cycle is set to be shorter than the average power mode determination cycle, the server operating in the on mode is converted to the sleep mode.

In addition, when the power consumption for the servers increases as the overall network traffic increases, when the currently set power mode determination period is long, the server operating in the off mode is switched to the on mode, and the currently set power mode determination cycle is short. In this case, the server operating in the sleep mode is switched to the on mode. This is because a sudden increase or decrease in traffic causes the server to operate in sleep mode rather than in off mode to cope with future traffic fluctuations. However, when the traffic is gradually reduced and the difference in power consumption is small, power consumption may be reduced by converting some of the servers operating in the on mode to the off mode.

On the other hand, when the power mode determination unit 250 determines the conversion of the power mode for some of the server operating in the on mode, the order of least traffic processing among the servers operating in the on mode with reference to the server DB (240) Decide which server you want to switch to off or sleep mode. This can minimize disruptions to the overall network connection. The server DB 240 may be configured together with the power consumption DB 220, and stores data of the type shown in Table 3 below.

Need server Server 1 Server 2 Server 3 ... Server n First judgment point 3 On On On ... slip Second judgment point 2 On off On ... slip : : : : : ... : Control point 5 On On On ... On

The server DB 240 stores a power mode history for each server as shown in Table 3. In Table 3, 'the first judgment time and the second judgment time, the second judgment time and the third judgment time,... Is the start time and the end time of each power mode decision period for determining the conversion of the power mode, and is the time between the time of setting the power mode decision period. Between the viewpoint and the second viewpoint, between the second viewpoint and the third viewpoint,. In this case, the interval between the n-th time point and the updated first time point is set as a time interval, and the determination time point is variable according to the setting of the power mode determination period. In Table 3, if the number of servers required according to the traffic volume at the first determination point was three, but only two were needed due to the decrease in the traffic amount at the second determination point, the power mode of any one server in the server 1 to server n It is necessary to turn off or slip. In this case, the amount of traffic for each server is additionally determined, and when the amount of traffic of server 2 is the smallest, at the second determination time, the power mode of server 2 is determined to be off or sleep.

Next, the controller 270 controls the power operation of the server determined to convert the power mode according to the power mode determined by the power mode determination unit 250 (S330). The controller 270 refers to the server DB 240 to determine a list of servers currently operating in the on / off / sleep mode. In addition, the power mode determination unit 250 receives a list of servers for which power mode conversion is determined and converts the power mode of the corresponding server.

In addition, when the mode is switched, the controller 270 adjusts load balancing to the operation server or controls to distribute the connection request to another on mode operation server. When the server in off mode or sleep mode is converted to on mode, more load is distributed to the converted server to equalize the load with other servers. Distribute to the server. On the other hand, when the server in on mode is turned off or in sleep mode, it is removed from the load balancing list before the server is turned off. When the server is completely disconnected, the server is converted to mode. Distribute the server's connection to another server. In this case, the technique of distributing connections to other servers may apply the technique generally used in load balancing of servers.

4A and 4B are exemplary diagrams for describing setting of a power mode determination period according to FIG. 3.

In FIG. 4A, when the power W1 measured at the first time point is compared with the power W2 measured at the second time point, it can be seen that power consumption is gradually increased. This indicates that traffic to a plurality of servers is currently increasing. In this case, by shortening the currently set power mode determination period, it is possible to prepare for an increase in the number of servers according to the increase in traffic. The time interval between the first time point and the second time point may be periodically set by a user setting as a time interval for setting a power mode determination period. However, the power mode determination period between the first time point and the second time point is variably set by the power mode mode determination period setting unit 230. In addition, the difference in power consumption W3-W2 calculated by comparing the power consumption at the second time point with the power consumption at the third time point is greater than the difference W2-W1 at the first time point and the second time point. If large, the power mode decision period is set shorter.

Referring to FIG. 4B, the difference in power consumption W2-W1 between the power consumption W1 measured at the first time point and the power consumption W2 measured at the second time point is greater than or equal to a preset threshold. This may be the case when an exceptional connection request (DDoS) occurs in a plurality of servers. The power mode determination period setting unit 230 sets the power mode determination period to a minimum between the second time point and the third time point. This is to make a power mode decision from time to time to quickly switch the server in sleep or off mode to on mode in order to prevent excessive traffic from paralyzing the entire network due to a sudden connection request to the server. Thus, in this manner, it is possible to predict and cope with future traffic conditions in consideration of the current traffic conditions, and to cope with sudden spikes and dips in connection.

The server control method, the server control apparatus and the server control system using the power mode conversion according to the present invention can control the power mode in consideration of the situation of the server, and can cope with sudden spikes (DDoS) and sudden drops of requests. .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, Therefore, the present invention should be construed as a description of the claims which are intended to cover obvious variations that can be derived from the described embodiments.

100: client terminal 200: server control device
210: power consumption estimation unit 220: power consumption DB
230: power mode determination cycle setting unit 240: server DB
250: power mode determination unit 270: control unit
300: server

Claims (21)

Estimating power consumption of the plurality of servers by measuring a traffic amount of the plurality of servers;
Setting power mode determination periods of the plurality of servers by comparing the estimated power consumptions of the plurality of servers with power consumption histories generated by estimating the power consumption at predetermined time intervals;
Estimating power consumption of the plurality of servers at each set power mode determination period, selecting a server to which a power mode is to be converted, and determining a power mode of the selected server; And
And controlling a power operation of the selected server according to the determined power mode. The method of claim 1,
The power mode may include an on mode for supplying power to the server, an off mode for shutting off power supplied to the server, and a sleep mode for temporarily shutting off power supplied to the server. . The method of claim 1,
Setting the power mode determination period of the plurality of servers,
By comparing the power consumption of the server estimated at a first time point with the power consumption of the server estimated at a second time point, a difference in power consumption is greater than a preset minimum power consumption threshold and greater than a preset maximum power consumption threshold. In a small case, a determination period in which a difference in power consumption is preset by comparing the power consumption of the server estimated at the second time point and the power consumption of the server estimated at a third past time point among the power consumption histories of the server is compared. The method of controlling a server using power mode conversion, wherein the power mode mode is set to be shorter than the determination value, and the power mode mode is set to be longer if the difference in power consumption is smaller than the determination period. The method of claim 3,
Comparing the power consumption of the server estimated at the first time point with the power consumption of the server estimated at the second time point, the difference in power consumption is smaller than the minimum power consumption threshold or the maximum power consumption threshold. If the value is larger than the value, the server control method using a power mode conversion to set the power mode decision period to a minimum. The method of claim 2,
Determining a power mode of the selected server,
The server control method using the power mode conversion to determine the power mode of the plurality of servers by calculating the number of servers according to the traffic amount for each set power mode determination period. The method of claim 5,
When the number of servers calculated at the start of the power mode determination period is greater than the number of servers calculated at the end of the power mode determination cycle, power mode conversion for converting the server operating in the on mode to the off mode or the sleep mode. Server control method using. The method according to claim 6,
The server is converted to the off mode or sleep mode server control method using the power mode conversion to determine the least traffic processing among the server operating in the on mode. The method according to claim 6,
The server control method using the power mode conversion to convert the server operating in the on mode to the off mode, if the power mode decision period is greater than the predetermined decision period threshold value, and to switch to the sleep mode if less than the threshold value. . The method of claim 5,
When the number of servers calculated at the start of the power mode decision period is less than the number of servers calculated at the end of the power mode decision period, the server enters the off mode when the power mode decision period is greater than a predetermined decision period threshold. The server control method using the power mode conversion to convert the operating server to the on mode, and if it is smaller than the threshold value, the server operating in the sleep mode to the on mode. The method of claim 5, wherein the controlling step,
When the plurality of servers operating in the on mode are converted to the off mode or the sleep mode, the control is performed to distribute a connection request for the server operating in the on mode to another server operating in the on mode, and the sleep mode or off When converting a plurality of servers operating in the on mode, the server control method using the power mode conversion to control to distribute the connection request for the other server operating in the on mode to the server converted to the on mode. A power consumption estimator for estimating power consumption of the plurality of servers by measuring a traffic amount of a plurality of servers;
A power mode determination period setting unit configured to set power mode determination periods of the plurality of servers by comparing the estimated power consumptions of the plurality of servers with power consumption histories generated by estimating the power consumption at predetermined time intervals;
A power mode determination unit which estimates power consumption of the plurality of servers at each set power mode determination period, selects a server to which a power mode is to be converted, and determines a power mode of the selected server; And
And a controller for controlling a power operation of the selected server according to the determined power mode. The method of claim 11,
The power mode may include an on mode for supplying power to the server, an off mode for interrupting power supplied to the server, and a sleep mode for temporarily shutting off power supplied to the server. . The method of claim 11, wherein the power mode determination period setting unit,
By comparing the power consumption of the server estimated at a first time point with the power consumption of the server estimated at a second time point, a difference in power consumption is greater than a preset minimum power consumption threshold and greater than a preset maximum power consumption threshold. In a small case, a determination period in which a difference in power consumption is preset by comparing the power consumption of the server estimated at the second time point and the power consumption of the server estimated at a third past time point among the power consumption histories of the server is compared. The server control apparatus using the power mode conversion to set the power mode determination period short when the determination value is larger than the determination value, and to set the power mode determination period longer when the difference in power consumption is smaller than the determination period determination value. The method of claim 13,
Comparing the power consumption of the server estimated at the first time point with the power consumption of the server estimated at the second time point, the difference in power consumption is smaller than the minimum power consumption threshold or the maximum power consumption threshold. If greater, the server control device using a power mode conversion to set the power mode decision period to a minimum. The method of claim 12, wherein the power mode determiner,
Server control apparatus using power mode conversion to determine the power mode of the plurality of servers by calculating the number of servers according to the traffic amount for each set power mode determination period. 16. The method of claim 15,
When the number of servers calculated at the start of the power mode determination period is greater than the number of servers calculated at the end of the power mode determination cycle, power mode conversion for converting the server operating in the on mode to the off mode or the sleep mode. Server control device using. 17. The method of claim 16,
The server control apparatus using the power mode conversion to determine the server is converted to the off mode or sleep mode in the order of least traffic processing among the server operating in the on mode. 17. The method of claim 16,
The server control apparatus using the power mode conversion to convert the server operating in the on mode to the off mode, if the power mode decision period is larger than the predetermined decision period threshold, and to switch to the sleep mode if less than the threshold value . 16. The method of claim 15,
When the number of servers calculated at the start of the power mode decision period is less than the number of servers calculated at the end of the power mode decision period, the server enters the off mode when the power mode decision period is greater than a predetermined decision period threshold. The server control apparatus using a power mode conversion for converting the server to the operating mode, and if the smaller than the threshold value, the server operating in the sleep mode to the on mode. 16. The apparatus of claim 15,
When the plurality of servers operating in the on mode are converted to the off mode or the sleep mode, the control is performed to distribute a connection request for the server operating in the on mode to another server operating in the on mode, and the sleep mode or off When the plurality of servers operating in the mode is converted to the on mode, the server control device using the power mode conversion to control to distribute the connection request to another server operating in the on mode to the server converted to the on mode. A plurality of servers;
A plurality of client terminals requesting connection to the plurality of servers; And
A power consumption estimator for estimating power consumption of the plurality of servers by measuring the traffic volume of a plurality of servers; and consumption generated by estimating the power consumption of the plurality of servers and the power consumption at predetermined time intervals. Comparing the power history, the power mode determination period setting unit for setting the power mode determination period of the plurality of servers, the power consumption of the plurality of servers to estimate the power consumption mode for each set power mode determination period, the power mode should be converted And a server control apparatus including a power mode conversion unit for selecting a server and determining a power mode of the selected server, and a control unit controlling a power operation of the selected server according to the determined power mode. Server control system using power mode conversion.

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