JP5988930B2

JP5988930B2 - Deployment apparatus and its deployment method for standby system in server virtualization environment

Info

Publication number: JP5988930B2
Application number: JP2013152312A
Authority: JP
Inventors: 彦俊中里; 清水　雅史; 雅史清水; 瀬社家　光; 光瀬社家
Original assignee: Nippon Telegraph and Telephone Corp
Current assignee: Nippon Telegraph and Telephone Corp
Priority date: 2013-07-23
Filing date: 2013-07-23
Publication date: 2016-09-07
Anticipated expiration: 2033-07-23
Also published as: JP2015022671A

Description

本発明は、サーバ仮想化環境における予備系装置の配備技術に関する。 The present invention relates to a technology for deploying a standby system device in a server virtualization environment.

近年、複数の仮想マシンを１台の物理サーバ上に配置して実行することで、物理サーバの台数を削減し、リソース使用効率を向上させるサーバ仮想化システムの検討が進められている。例えば、下記に示す特許文献１には、配置予定の仮想マシンのリソース情報と、物理サーバのリソース情報とに基づいて、各仮想マシンの配置先となる物理サーバを決定する技術が開示されている。また、特許文献１は、サーバ仮想化システム全体の総消費電力量が低減されるように、リソース使用率の低い物理サーバの仮想マシンを再配置し、仮想マシンが未配置となった物理サーバの電源をＯＦＦにする技術も開示している。 In recent years, server virtualization systems that reduce the number of physical servers and improve resource usage efficiency by arranging and executing a plurality of virtual machines on one physical server have been studied. For example, Patent Document 1 shown below discloses a technique for determining a physical server that is the placement destination of each virtual machine based on the resource information of the virtual machine to be placed and the resource information of the physical server. . Further, Patent Document 1 relocates a virtual machine of a physical server with a low resource usage rate so that the total power consumption of the entire server virtualization system is reduced, A technique for turning off the power is also disclosed.

特開２０１０−０６１２７８号公報JP 2010-061278 A

しかしながら、電源をＯＦＦにしてしまった物理サーバは、その電源を再びＯＮにして、各プロセスが正常に動作するようになるまでに所定の時間を要する。そのため、仮想マシンを配置しようとする時になってから物理サーバの電源をＯＮにしても、各プロセスが正常に動作するまで待たなければならないという問題がある。つまり、仮想マシンを稼動するまでには所定の時間を要することとなり、サーバ仮想化システムの信頼性を保障することができない虞がある。 However, a physical server that has been turned off takes a predetermined time before turning on its power again and allowing each process to operate normally. Therefore, there is a problem that even if the physical server is turned on after the virtual machine is to be arranged, it is necessary to wait until each process operates normally. That is, a predetermined time is required until the virtual machine is operated, and the reliability of the server virtualization system may not be ensured.

そこで、本発明は、複数の仮想マシンを物理サーバ上に配置して実行するサーバ仮想化システムの信頼性を保障する技術を提供することを課題とする。 Therefore, an object of the present invention is to provide a technique for guaranteeing the reliability of a server virtualization system in which a plurality of virtual machines are arranged and executed on a physical server.

本発明のサーバ仮想化環境における予備系装置の配備装置は、サーバ仮想化システムを構成し現用系装置と予備系装置の機能を交代可能な複数の物理サーバに対して、仮想マシンが未配置かつ電源ＯＮ状態の物理サーバである電源ＯＮ予備系装置と、仮想マシンが配置されて稼動する物理サーバである現用系装置とを区別した前記物理サーバの種別を記憶する記憶部と、前記現用系装置の負荷に応じて、前記電源ＯＮ予備系装置のスループット値に対する前記現用系装置のスループット値の比が第１の所定の条件範囲を満たすように前記電源ＯＮ予備系装置の台数を決定し、前記物理サーバの種別を前記記憶部に記憶する物理サーバ電源状態決定部と、前記サーバ仮想化システムを構成する複数の物理サーバの中で、前記現用系装置および前記電源ＯＮ予備系装置以外の前記物理サーバの電源をＯＦＦにする物理サーバ電源切替実行部と、を備え、前記物理サーバ電源状態決定部が、前記記憶部に記憶された種別の記載が前記電源ＯＮ予備系装置から現用系装置に変更された後に仮想マシン未配置となった現用系装置を前記電源ＯＮ予備系装置に変更する場合、前記仮想マシン未配置の現用系装置のスループット値を前記現用系装置のスループット値で除算した比が第１の所定の閾値を超えないように、前記仮想マシン未配置の現用系装置について前記記憶部に記憶された種別の記載を前記電源ＯＮ予備系装置に変更し、変更後の前記電源ＯＮ予備系装置のスループット値に対する前記現用系装置のスループット値の比が前記第１の所定の条件範囲を満たすように余剰となる前記電源ＯＮ予備系装置について前記記憶部に記憶された種別の記載を電源ＯＦＦ状態となっている物理サーバである電源ＯＦＦ予備系装置に変更することを特徴とする。
また、本発明のサーバ仮想化環境における予備系装置の配備装置は、サーバ仮想化システムを構成し現用系装置と予備系装置の機能を交代可能な複数の物理サーバに対して、仮想マシンが未配置かつ電源ＯＮ状態の物理サーバである電源ＯＮ予備系装置と、仮想マシンが配置されて稼動する物理サーバである現用系装置とを区別した前記物理サーバの種別を記憶する記憶部と、前記現用系装置の負荷に応じて、前記電源ＯＮ予備系装置の台数に対する前記現用系装置の台数の比が第２の所定の条件範囲を満たすように前記電源ＯＮ予備系装置の台数を決定し、前記物理サーバの種別を前記記憶部に記憶する物理サーバ電源状態決定部と、前記サーバ仮想化システムを構成する複数の物理サーバの中で、前記現用系装置および前記電源ＯＮ予備系装置以外の前記物理サーバの電源をＯＦＦにする物理サーバ電源切替実行部と、を備え、前記物理サーバ電源状態決定部が、前記記憶部に記憶された種別の記載が前記電源ＯＮ予備系装置から現用系装置に変更された後に仮想マシン未配置となった現用系装置を前記電源ＯＮ予備系装置に変更する場合、前記仮想マシン未配置の現用系装置の台数を前記現用系装置の台数で除算した比が第２の所定の閾値を超えないように、前記仮想マシン未配置の現用系装置について前記記憶部に記憶された種別の記載を前記電源ＯＮ予備系装置に変更し、変更後の前記電源ＯＮ予備系装置の台数に対する前記現用系装置の台数の比が前記第２の所定の条件範囲を満たすように余剰となる前記電源ＯＮ予備系装置について前記記憶部に記憶された種別の記載を電源ＯＦＦ状態となっている物理サーバである電源ＯＦＦ予備系装置に変更することを特徴とする。 The standby apparatus deployment device in the server virtualization environment of the present invention is configured such that a virtual machine is not allocated to a plurality of physical servers that constitute a server virtualization system and can replace the functions of the active system and the standby system. A storage unit for storing a type of the physical server that distinguishes between a power-on standby system device that is a physical server in a power-on state and an active device that is a physical server on which a virtual machine is placed and operates ; and the active device depending on the load, the ratio of the throughput values of the active system device determines the number of the power supply oN auxiliary system devices to satisfy a first predetermined condition range against the throughput value of the power supply oN auxiliary system device A physical server power state determination unit that stores the type of the physical server in the storage unit, and a plurality of physical servers constituting the server virtualization system, the active device and the previous It includes a physical server power switching execution unit for the power of the physical servers other than the power ON auxiliary system device to OFF, and the physical server power state determination unit, said power supply ON according to the type stored in the storage unit When the active device that has not been allocated to the virtual machine after being changed from the standby device to the active device is changed to the power-on standby device, the throughput value of the active device that is not allocated to the virtual machine is changed to the active system. Changed the description of the type stored in the storage unit to the power-on standby system device for the active system device in which the virtual machine is not arranged so that the ratio divided by the device throughput value does not exceed the first predetermined threshold value Then, the ratio of the throughput value of the active system device to the throughput value of the power-on standby system device after the change becomes surplus so as to satisfy the first predetermined condition range. And changing the description of the type stored in the storage unit for ON auxiliary system devices to the power supply OFF auxiliary system device is a physical server that has a power OFF state.
In addition, the standby device deployment device in the server virtualization environment of the present invention has no virtual machine for a plurality of physical servers that constitute the server virtualization system and can replace the functions of the active device and the standby device. A storage unit that stores a type of the physical server that distinguishes between a power-on standby system device that is a physical server that is placed and powered on, and an active device that is a physical server in which a virtual machine is placed and operates; In accordance with the load of the system device, the number of the power-on standby system devices is determined such that the ratio of the number of the active system devices to the number of the power-on standby system devices satisfies a second predetermined condition range, A physical server power state determination unit that stores the type of the physical server in the storage unit, and the active device and the power-on spare among the plurality of physical servers that constitute the server virtualization system A physical server power supply switching execution unit that turns off the power supply of the physical server other than the device, and the physical server power state determination unit is configured so that the description of the type stored in the storage unit is from the power-on standby system device. When the active device that has not been allocated to the virtual machine after being changed to the active device is changed to the power-on standby device, the number of active devices that are not allocated to the virtual machine is divided by the number of active devices. In order to prevent the ratio from exceeding the second predetermined threshold, the description of the type stored in the storage unit is changed to the power-on standby system device for the active device in which the virtual machine is not arranged, A description of the type stored in the storage unit for the power-on standby system device in which the ratio of the number of active devices to the number of power-on standby system devices is surplus so as to satisfy the second predetermined condition range. And changes to the power OFF auxiliary system device is a physical server that has a power OFF state.

このような構成によれば、サーバ仮想化環境における予備系装置の配備装置（以降、単に配備装置と称する。）は、常に適切な台数の電源ＯＮ予備系装置を備えているので、急な負荷の増加時にも、仮想マシンを配置して直ちに稼動させることができる。つまり、サーバ仮想化システムは、信頼性を保障することができる。また、配備装置は、現用系装置および電源ＯＮ予備系装置以外の物理サーバの電源をＯＦＦにするので、サーバ仮想化システム全体の総消費電力量を抑えることができる。
また、このような構成によれば、前記配備装置は、仮想マシン未配置となった現用系装置を電源ＯＮ予備系装置に変更する場合、仮想マシン未配置となった現用系装置が現用系装置の所定割合分となるように制御し、その所定割合分以外の仮想マシン未配置となった現用系装置を電源ＯＮ予備系装置に変更し、さらに第１の所定の条件範囲（または第２の所定の条件範囲）を満たすように適切な電源ＯＮ予備系装置の台数を決定する。そして、前記配備装置は、現用系装置および電源ＯＮ予備系装置以外の物理サーバの電源をＯＦＦに変更する。したがって、サーバ仮想化システムは、電源ＯＮ予備系装置の台数を適切に決定することにより、信頼性を保障するとともに、現用系装置および電源ＯＮ予備系装置以外の物理サーバの電源をＯＦＦにすることにより、消費電力量を抑えることができる。 According to such a configuration, the deployment device for the standby system device in the server virtualization environment (hereinafter simply referred to as the deployment device) always includes an appropriate number of power-on standby system devices. Even when the number of virtual machines increases, virtual machines can be placed and operated immediately. That is, the server virtualization system can ensure reliability. Further, since the deployment device turns off the power of the physical servers other than the active device and the power-on standby device, the total power consumption of the entire server virtualization system can be suppressed.
Further, according to such a configuration, when the deployment device changes the active device that has not been allocated to the virtual machine to the power-on standby device, the active device that has not been allocated to the virtual machine is the active device. The active system device that has not been allocated to virtual machines other than the predetermined rate is changed to a power-on standby system device, and the first predetermined condition range (or second An appropriate number of power ON standby systems are determined so as to satisfy a predetermined condition range. Then, the deployment device changes the power of physical servers other than the active device and the power-on standby device to OFF. Therefore, the server virtualization system ensures reliability by appropriately determining the number of power-on standby devices, and turns off the power of physical servers other than the active device and the power-on standby device. As a result, power consumption can be reduced.

また、本発明の前記配備装置の前記物理サーバ電源状態決定部は、前記電源ＯＮ予備系装置を前記現用系装置に変更する場合、前記現用系装置のスループット値（または台数）に第１の所定の係数（または第２の所定の係数）を乗算して得られるスループット値を有する（または台数分の）前記電源ＯＮ予備系装置を前記現用系装置に変更することを特徴とする。 In addition, the physical server power state determination unit of the deployment device according to the present invention changes the throughput value (or number) of the active device to a first predetermined value when changing the power ON standby device to the active device. The power-on standby system apparatus having a throughput value obtained by multiplying the coefficient (or the second predetermined coefficient) (or the number of units) is changed to the active system apparatus.

このような構成によれば、前記配備装置は、電源ＯＮ予備系装置を現用系装置に変更する場合、現用系装置の所定割合に相当する電源ＯＮ予備系装置の台数を、現用系装置に変更する。したがって、サーバ仮想化システムは、常に適切な台数の電源ＯＮ予備系装置を備えているので、急な負荷の増加時にも、仮想マシンを配置して直ちに稼動させることができる。つまり、サーバ仮想化システムは、信頼性を保障することができる。 According to such a configuration, when the deployment device changes the power-on standby device to the active device, the number of power-on standby devices corresponding to a predetermined ratio of the active device is changed to the active device. To do. Therefore, since the server virtualization system always includes an appropriate number of power-on standby system devices, a virtual machine can be arranged and immediately operated even when a sudden load increases. That is, the server virtualization system can ensure reliability.

なお、前記配備装置の配備方法に係る発明については、前記した配備装置と同様の技術的特徴を備えており、配備装置と同様の作用効果を有しているので、記載を省略する。 In addition, about the invention which concerns on the deployment method of the said deployment apparatus, since it has the same technical feature as the above-mentioned deployment apparatus and has the same effect as a deployment apparatus, description is abbreviate | omitted.

本発明によれば、複数の仮想マシンを物理サーバ上に配置して実行するサーバ仮想化システムの信頼性を保障することができる。 According to the present invention, it is possible to guarantee the reliability of a server virtualization system in which a plurality of virtual machines are arranged and executed on a physical server.

サーバ仮想化システムの構成例を示す図である。It is a figure which shows the structural example of a server virtualization system. 電源ＯＮ予備系装置の台数を調整する処理の概要を示す図である。It is a figure which shows the outline | summary of the process which adjusts the number of power ON standby system apparatuses. 物理サーバ情報の一例を示す図である。It is a figure which shows an example of physical server information. 電源ＯＮ予備系装置の台数を調整するための処理フロー例を示す図である。It is a figure which shows the example of a processing flow for adjusting the number of power ON standby systems.

本発明を実施するための形態（以降、「本実施形態」と称す。）について、適宜図面を参照しながら詳細に説明する。 A mode for carrying out the present invention (hereinafter referred to as “the present embodiment”) will be described in detail with reference to the drawings as appropriate.

はじめに、１つ以上の仮想マシン２０を１台の物理サーバ１０上に配置して実行するサーバ仮想化システム１００の構成例について、図１を用いて説明する。なお、図１では、本発明に直接関係する構成および機能のみを記載し、その他の記載を省略している。 First, a configuration example of the server virtualization system 100 in which one or more virtual machines 20 are arranged and executed on one physical server 10 will be described with reference to FIG. In FIG. 1, only the configuration and functions directly related to the present invention are shown, and other descriptions are omitted.

サーバ仮想化システム１００は、リソース調整装置４０および複数の物理サーバ１０を備える。リソース調整装置４０と物理サーバ１０とはネットワークを介して通信可能に接続されている。 The server virtualization system 100 includes a resource adjustment device 40 and a plurality of physical servers 10. The resource adjustment device 40 and the physical server 10 are communicably connected via a network.

物理サーバ１０は、リソース調整装置４０によって配置された１つ以上の仮想マシン２０を実行する機能を有する。なお、物理サーバ１０は、仮想マシン２０が配置され稼動している現用系装置群３０、仮想マシン２０が現時点では未配置であるが配置されれば直ちに実行可能にスタンバイ状態（電源ＯＮ状態）となっている電源ＯＮ予備系装置群３１、電源ＯＦＦ状態となっている電源ＯＦＦ予備系装置群３２、のいずれか１つに分類される。 The physical server 10 has a function of executing one or more virtual machines 20 arranged by the resource adjustment device 40. The physical server 10 is in a standby state (power-on state) that can be executed immediately if the active machine group 30 in which the virtual machine 20 is placed and operating, and the virtual machine 20 is not placed at the present time, but is placed. The power-on standby system group 31 and the power-off standby system group 32 in the power-off state are classified into any one of the above.

現用系装置群３０の物理サーバ１０（以降、現用系装置と称することもある。）の台数は、リソース調整装置４０の仮想マシン配置先物理サーバ決定部４１１によって決定されるものとする。なお、その配置先の決定方法は、既存の技術（例えば、特許文献１等に記載の技術）を用いることができ、その説明を省略する。 The number of physical servers 10 in the active device group 30 (hereinafter also referred to as active devices) is determined by the virtual machine placement physical server determining unit 411 of the resource adjustment device 40. Note that an existing technique (for example, the technique described in Patent Document 1) can be used as a method for determining the arrangement destination, and the description thereof is omitted.

電源ＯＮ予備系装置群３１の物理サーバ１０（以降、電源ＯＮ予備系装置と称することもある。）の台数は、サーバ仮想化システム１００の信頼性を保障しつつ、消費電力量を低減するために、電源ＯＮ状態の物理サーバ１０の台数を低減するように決められる。つまり、電源ＯＮ予備系装置群３１の物理サーバ１０の台数は、現用系装置群３０の物理サーバ１０の負荷やその変動に応じて調整される必要がある。なお、負荷は、例えば、ＣＰＵ（Central Processing Unit）使用率、メモリ使用率等で表される。ＣＰＵ使用率は、実行中のアプリケーション・ホストＯＳがＣＰＵを占有している時間の割合を表す。メモリ使用率は、実行中のアプリケーション・ホストＯＳがメモリを占有している割合を表す。そして、電源ＯＮ予備系装置群３１の物理サーバ１０は、現用系装置において負荷の急激な増加に伴うリソース不足時に、仮想マシン２０を配置され、当該仮想マシン２０を実行する。 The number of physical servers 10 (hereinafter also referred to as power-on standby system devices) in the power-on standby system group 31 is to reduce the power consumption while ensuring the reliability of the server virtualization system 100. In addition, the number of physical servers 10 in the power ON state is determined to be reduced. That is, the number of physical servers 10 in the power-on standby system group 31 needs to be adjusted according to the load of the physical server 10 in the active system group 30 and its variation. The load is expressed by, for example, a CPU (Central Processing Unit) usage rate, a memory usage rate, and the like. The CPU usage rate represents the percentage of time that the running application host OS occupies the CPU. The memory usage rate represents the rate at which the running application host OS occupies the memory. The physical server 10 of the power-on standby system group 31 is provided with the virtual machine 20 and executes the virtual machine 20 when there is a shortage of resources in the active system device due to a rapid increase in load.

電源ＯＦＦ予備系装置群３２の物理サーバ１０（以降、電源ＯＦＦ予備系装置と称することもある。）の台数は、サーバ仮想化システム１００を構成するすべての物理サーバ１０の中から、現用系装置および電源ＯＮ予備系装置を除いたものとなる。 The number of physical servers 10 in the power-off standby system group 32 (hereinafter also referred to as power-off standby system devices) is the active system device among all physical servers 10 constituting the server virtualization system 100. In addition, the power-on standby system device is excluded.

また、物理サーバ１０は、機能として、リソース情報収集部１１を備える。リソース情報収集部１１は、図示しないＣＰＵおよびメインメモリによって構成された処理部において、図示しない記憶部に記憶されているアプリケーションプログラムをメインメモリに展開して具現化される。リソース情報収集部１１は、現用系装置群３０の物理サーバ１０の負荷（例えば、ＣＰＵ使用率、メモリ使用率等）を定期的にリソース調整装置４０に送信する機能を有する。また、物理サーバ１０は、リソース調整装置４０から電源のＯＮまたはＯＦＦの指示を受信したとき、その電源をＯＮまたはＯＦＦする機能（不図示）を備える。 Further, the physical server 10 includes a resource information collection unit 11 as a function. The resource information collection unit 11 is implemented by developing an application program stored in a storage unit (not shown) in the main memory in a processing unit including a CPU and a main memory (not shown). The resource information collection unit 11 has a function of periodically transmitting the load (for example, CPU usage rate, memory usage rate) of the physical server 10 of the active device group 30 to the resource adjustment device 40. Further, the physical server 10 has a function (not shown) for turning on or off the power when receiving an instruction to turn on or off the power from the resource adjustment device 40.

次に、リソース調整装置４０の機能について説明する。ただし、本実施形態では、リソース調整装置４０の機能すべてについて説明するのではなく、本発明に直接関係する機能に限って説明する。 Next, functions of the resource adjustment device 40 will be described. However, in this embodiment, not all functions of the resource adjustment device 40 will be described, but only functions that are directly related to the present invention will be described.

リソース調整装置４０は、処理部４１、記憶部４２および通信部４３を備える。処理部４１は、図示しないＣＰＵおよびメインメモリによって構成され、記憶部４２に記憶されているアプリケーションプログラムをメインメモリに展開して、仮想マシン配置先物理サーバ決定部４１１および電源制御部４１２を具現化している。 The resource adjustment device 40 includes a processing unit 41, a storage unit 42, and a communication unit 43. The processing unit 41 is configured by a CPU and a main memory (not shown), and develops an application program stored in the storage unit 42 in the main memory to embody a virtual machine placement destination physical server determination unit 411 and a power control unit 412. ing.

仮想マシン配置先物理サーバ決定部４１１は、仮想マシン２０を配置する物理サーバ１０を決定する機能を有する。仮想マシン配置先物理サーバ決定部４１１は、出来るだけ現用系装置の中から仮想マシン２０の配置先を決定するが、現用系装置のリソースが不足する場合には、電源ＯＮ予備系装置の中から配置先を決定する。なお、配置先の決定方法には、既存の技術（例えば、特許文献１等に記載の技術）を用いることができ、本実施形態では、その説明を省略する。 The virtual machine placement destination physical server determination unit 411 has a function of determining the physical server 10 on which the virtual machine 20 is placed. The virtual machine placement destination physical server determination unit 411 determines the placement destination of the virtual machine 20 from among the active devices as much as possible. When the resources of the active device are insufficient, the virtual machine placement destination physical server determination unit 411 Determine the placement destination. Note that an existing technique (for example, the technique described in Patent Document 1) can be used as the arrangement destination determination method, and the description thereof is omitted in the present embodiment.

電源制御部４１２は、機能として、物理サーバ電源状態決定部４１３および物理サーバ電源切替実行部４１４を備える。
物理サーバ電源状態決定部４１３は、予め、物理サーバスペック値を記憶部４２の物理サーバスペック情報４２１に記憶する機能を有する。また、物理サーバ電源状態決定部４１３は、現用系装置のスペック値や負荷に応じて電源ＯＮ予備系装置の台数を変更し、物理サーバ１０の電源のＯＮまたはＯＦＦを決定する機能を有する。具体的には、物理サーバ電源状態決定部４１３は、電源ＯＮ予備系装置の初期台数を、後記する物理サーバスペック情報４２１を参照して、現用系装置のスペック値（または台数）に基づいて決定する機能を有する。物理サーバスペック値とは、例えば、物理サーバ１０に搭載されているＣＰＵのコア数、クロック周波数等である。また、物理サーバ電源状態決定部４１３は、すべての現用系装置がリソース不足と判定された場合には、現用系装置のスペック値（または台数）の一定割合の電源ＯＮ予備系装置を現用系装置に変更する機能を有する。また、物理サーバ電源状態決定部４１３は、仮想マシン未配置の現用系装置が一定基準存在した場合には、一定の仮想マシン未配置の現用系装置を電源ＯＮ予備系装置に変更する機能を有する。そして、物理サーバ電源状態決定部４１３は、その電源状態の種別（現用系装置、電源ＯＮ予備系装置、電源ＯＦＦ予備系装置）を物理サーバスペック情報４２１に記憶する機能を有する。なお、物理サーバスペック情報４２１の詳細については後記する。また、物理サーバ電源状態決定部４１３は、通信部４３を介して、物理サーバ１０の現用系装置から負荷の状態に関する情報（例えば、ＣＰＵ使用率、メモリ使用率）を定期的に受信して、記憶部４２の物理サーバ負荷情報４２２に記憶するとともに、その物理サーバ負荷情報４２２を参照してリソース不足を判定する機能を有する。なお、物理サーバ電源状態決定部４１３は、現用系装置の負荷が所定の閾値を超えた場合に、リソース不足と判定する。 The power control unit 412 includes a physical server power state determination unit 413 and a physical server power switch execution unit 414 as functions.
The physical server power state determination unit 413 has a function of storing a physical server specification value in the physical server specification information 421 of the storage unit 42 in advance. Further, the physical server power state determination unit 413 has a function of changing the number of power-on standby system devices according to the specification value and load of the active device and determining whether the physical server 10 is powered on or off. Specifically, the physical server power state determination unit 413 determines the initial number of power-on standby system devices based on the specification value (or number) of the active system device with reference to physical server specification information 421 described later. It has the function to do. The physical server specification value is, for example, the number of CPU cores mounted on the physical server 10, the clock frequency, and the like. Further, when it is determined that all the active devices are lacking resources, the physical server power supply state determination unit 413 determines that the power-on standby device is a fixed percentage of the specification value (or the number) of the active devices. The function to change to. Further, the physical server power state determination unit 413 has a function of changing a certain active system device in which a virtual machine has not been allocated to a power-on standby system device if there is a certain reference for the active system device in which no virtual machine is allocated. . The physical server power state determination unit 413 has a function of storing the type of power state (active device, power-on standby device, power-off standby device) in the physical server specification information 421. Details of the physical server specification information 421 will be described later. In addition, the physical server power state determination unit 413 periodically receives information (for example, CPU usage rate, memory usage rate) regarding the load status from the active device of the physical server 10 via the communication unit 43. While storing in the physical server load information 422 of the memory | storage part 42, it has the function to determine a resource shortage with reference to the physical server load information 422. The physical server power state determination unit 413 determines that the resource is insufficient when the load on the active device exceeds a predetermined threshold.

物理サーバ電源切替実行部４１４は、物理サーバ電源状態決定部４１３によって決定された物理サーバ１０の電源のＯＮまたはＯＦＦの指示を物理サーバ１０に送信する機能を有する。 The physical server power switch execution unit 414 has a function of transmitting to the physical server 10 an instruction to turn on or off the power of the physical server 10 determined by the physical server power state determination unit 413.

ここで、電源制御部４１２の物理サーバ電源状態決定部４１３における、電源ＯＮ予備系装置の台数を調整する処理の概要について、図２を用いて説明する。
図２では、横方向に、サーバ仮想化システム１００を構成する７台の物理サーバ１０を矩形で表している。縦方向には、下方に向って、時間の経過を表している。
図２に示すように、時刻ｔ１では、３台の物理サーバ１０（白抜きの矩形）が現用系装置であり、２台の物理サーバ１０（斜線を付した矩形）が電源ＯＮ予備系装置であり、残りの２台の物理サーバ１０（ドットを付した矩形）が電源ＯＦＦ予備系装置である。 Here, an outline of a process of adjusting the number of power-on standby system devices in the physical server power state determination unit 413 of the power control unit 412 will be described with reference to FIG.
In FIG. 2, the seven physical servers 10 constituting the server virtualization system 100 are represented by rectangles in the horizontal direction. In the vertical direction, it represents the passage of time downward.
As shown in FIG. 2, at time t1, three physical servers 10 (open rectangles) are active devices, and two physical servers 10 (shaded rectangles) are power-on standby devices. The remaining two physical servers 10 (rectangles with dots) are power-off standby systems.

時刻ｔ２では、仮想マシン２０の増加に伴って、５台の物理サーバ１０（白抜きの矩形）が現用系装置であり、２台の物理サーバ１０（斜線を付した矩形）が電源ＯＮ予備系装置となった状態を表している。
時刻ｔ３では、２台の物理サーバ１０（白抜きの矩形）が現用系装置であり、１台の物理サーバ１０（斜線を付した矩形）が電源ＯＮ予備系装置であり、残りの４台の物理サーバ１０（ドットを付した矩形）が電源ＯＦＦ予備系装置である。 At time t2, as the number of virtual machines 20 increases, five physical servers 10 (open rectangles) are active devices, and two physical servers 10 (shaded rectangles) are power-on standby systems. This shows the state of the device.
At time t3, two physical servers 10 (open rectangles) are active devices, one physical server 10 (shaded rectangle) is a power-on standby device, and the remaining four servers The physical server 10 (rectangle with dots) is a power-off standby apparatus.

時刻ｔ４では、４台の物理サーバ１０（白抜きの矩形）が現用系装置であり、２台の物理サーバ１０（斜線を付した矩形）が電源ＯＮ予備系装置であり、残りの１台の物理サーバ１０（ドットを付した矩形）が電源ＯＦＦ予備系装置である。
このように、電源制御部４１２は、現用系装置の負荷に応じて電源ＯＮ予備系装置の台数を決定する。具体的には、下記に示す手順を用いて、物理サーバ電源状態決定部４１３が電源ＯＮ予備系装置の台数を決定する。 At time t4, four physical servers 10 (open rectangles) are active devices, two physical servers 10 (shaded rectangles) are power-on standby devices, and the remaining one The physical server 10 (rectangle with dots) is a power-off standby apparatus.
In this way, the power control unit 412 determines the number of power-on standby system devices according to the load of the active system device. Specifically, the physical server power supply state determination unit 413 determines the number of power-on standby devices using the procedure shown below.

＜手順１＞現用系装置の負荷に応じて、所定の条件範囲を満たすように電源ＯＮ予備系装置の台数を決定する。この手順１は、サーバ仮想化システム１００の初期設定に相当する。
＜手順２＞現用系装置の負荷の変動に応じて、電源ＯＮ予備系装置の台数を適切に調整する。すべての現用系装置にて負荷が増加しリソース不足と判定された場合には、一定の電源ＯＮ予備系装置を現用系装置に変更し、仮想マシン未配置の現用系装置が一定基準を超えた場合には、一定の仮想マシン未配置の現用系装置を電源ＯＮ予備系装置に変更する。ここで、一定基準とは、例えば、仮想マシン未配置の現用系装置のスループット値の現用系装置の合計スループット値に対する割合等である。
＜手順３＞手順２を実行したことによって電源ＯＮ予備系装置の台数が変化した場合、現用系装置のスペック値と電源ＯＮ予備系装置のスペック値とが所定の条件範囲を満たすように、電源ＯＮ予備系装置の台数と電源ＯＦＦ予備系装置の台数とを適切に調整する。 <Procedure 1> The number of power-on standby system devices is determined so as to satisfy a predetermined condition range according to the load of the active device. This procedure 1 corresponds to the initial setting of the server virtualization system 100.
<Procedure 2> The number of power-on standby system devices is appropriately adjusted in accordance with the load variation of the active device. If all the active devices are judged to have insufficient resources due to increased load, the fixed power-on standby device is changed to the active device, and the active device with no virtual machine placed exceeds a certain standard In this case, the active system device in which a certain virtual machine is not arranged is changed to a power-on standby system device. Here, the fixed reference is, for example, the ratio of the throughput value of the active system device in which the virtual machine is not arranged to the total throughput value of the active system device.
<Procedure 3> When the number of power-on standby system devices changes as a result of executing procedure 2, the power supply is set so that the specification value of the active system device and the specification value of the power-on standby system device satisfy the predetermined condition range. The number of ON standby system devices and the number of power-off standby system devices are appropriately adjusted.

次に、手順１の具体例について説明する。ここでは、負荷として物理サーバ１０のスループット値を用いる。スループット値は、例えば、物理サーバ１０に搭載されているＣＰＵコア数とクロック周波数（ＧＨｚ）とを乗算して求めたものである。
現用系装置群３０の物理サーバ１０のスループット値（スループットの合計値）をＮとし、電源ＯＮ予備系装置群３１の物理サーバ１０のスループット値（スループットの合計値）をＭとする。そして、Ｎに対するＭの比（Ｍ／Ｎ）が、所定の条件範囲（第１の所定の条件範囲）内に入るようにする。つまり、ａ（下限閾値）≦Ｍ／Ｎ≦ｂ（上限閾値）となるように、Ｍが調整される。そして、Ｍを満足する電源ＯＮ予備系装置の台数が決定される。 Next, a specific example of procedure 1 will be described. Here, the throughput value of the physical server 10 is used as the load. The throughput value is obtained, for example, by multiplying the number of CPU cores mounted on the physical server 10 and the clock frequency (GHz).
The throughput value (total throughput value) of the physical servers 10 in the active device group 30 is N, and the throughput value (total throughput value) of the physical servers 10 in the power-on standby device group 31 is M. The ratio of M to N (M / N) is set within a predetermined condition range (first predetermined condition range). That is, M is adjusted so that a (lower threshold) ≦ M / N ≦ b (upper threshold). Then, the number of power-on standby systems that satisfy M is determined.

次に、手順２の具体例について説明する。
すべての現用系装置にて負荷が増加しリソース不足と判定された場合には、現用系装置群３０の物理サーバ１０の合計スループット値Ｎに対して所定の係数ｃ（第１の所定の係数）を乗算して得られる、一定割合のスループット値を有する電源ＯＮ予備系装置を現用系装置に変更する。このとき、所定の係数ｃの値を大きくすると、安全側にリソースを確保できる。
また、仮想マシン未配置の現用系装置が一定基準を超えた場合には、一定の仮想マシン未配置の現用系装置を電源ＯＮ予備系装置に変更する。例えば、一定基準として、現用系装置の合計スループット値Ｎに所定の係数ｄを乗算した値（Ｎ×ｄ）を用いる。ここで、所定の係数ｄ（第１の所定の閾値）は、仮想マシン未配置の現用系装置の合計スループット値Ｏの現用系装置の合計スループット値Ｎに対する比率である。そして、仮想マシン未配置の現用系装置の合計スループット値Ｏが、前記値（Ｎ×ｄ）を超える場合、合計スループット値Ｏに所定の係数ｄおよびｅを乗算した一定割合（Ｏ×ｄ×ｅ）に相当する仮想マシン未配置の現用系装置を電源ＯＮ予備系装置に変更する。ここで、所定の係数ｅは、仮想マシン未配置の現用系装置を電源ＯＮ予備系装置に変更する比率を表す。このとき、ｄ，ｅを小さくすると安全側にリソースを確保できる。 Next, a specific example of procedure 2 will be described.
When it is determined that the load increases in all the active devices and the resource is insufficient, a predetermined coefficient c (first predetermined coefficient) with respect to the total throughput value N of the physical servers 10 in the active device group 30 The power-on standby system device having a certain percentage of throughput value obtained by multiplying by is changed to the active system device. At this time, if the value of the predetermined coefficient c is increased, resources can be secured on the safe side.
Further, when the active system device in which the virtual machine is not arranged exceeds a certain standard, the active system device in which the certain virtual machine is not arranged is changed to a power-on standby system device. For example, as a constant reference, a value (N × d) obtained by multiplying the total throughput value N of the active system apparatus by a predetermined coefficient d is used. Here, the predetermined coefficient d (first predetermined threshold value) is a ratio of the total throughput value O of the active system device in which the virtual machine is not arranged to the total throughput value N of the active system device. Then, when the total throughput value O of the active system apparatus in which the virtual machine is not arranged exceeds the value (N × d), a constant ratio (O × d × e) obtained by multiplying the total throughput value O by predetermined coefficients d and e. ) Is changed to a power-on standby system device. Here, the predetermined coefficient e represents a ratio of changing the active system device in which the virtual machine is not arranged to the power ON standby system device. At this time, if d and e are reduced, resources can be secured on the safe side.

次に、手順３の具体例について説明する。
手順２を実行したことによる電源ＯＮ予備系装置の台数変更により、現用系装置のスループット値に対する電源ＯＮ予備系装置のスループット値の比率（Ｍ／Ｎ）が前記手順１の所定の条件範囲（上限閾値ｂ）を超える場合、少なくとも超えた分の電源ＯＮ予備系装置を電源ＯＦＦ状態にして電源ＯＦＦ予備系装置に変更する。例として、前記比（Ｍ／Ｎ）が［下限閾値ａ＋上限閾値ｂ］／２を下回るまで、電源ＯＮ予備系装置を電源ＯＦＦ予備系装置に変更しても良い。
また、手順２を実行したことにより前記比（Ｍ／Ｎ）が前記手順１の所定の条件範囲（下限閾値ａ）を下回る場合、少なくとも下回った分の電源ＯＦＦ予備系装置を電源ＯＮ状態にして電源ＯＮ予備系装置に変更する。例として、前記比（Ｍ／Ｎ）が［下限閾値ａ＋上限閾値ｂ］／２を超えるまで、電源ＯＦＦ予備系装置を電源ＯＮ予備系装置に変更しても良い。 Next, a specific example of procedure 3 will be described.
The ratio (M / N) of the throughput value of the power-on standby system device to the throughput value of the active device is changed to the predetermined condition range (upper limit) of the procedure 1 by changing the number of power-on standby system devices due to the execution of procedure 2. When the threshold value b) is exceeded, at least the excess power ON standby system devices are set to the power OFF state and changed to the power OFF standby system devices. As an example, the power ON standby system device may be changed to a power OFF standby system device until the ratio (M / N) falls below [lower threshold value a + upper threshold value b] / 2.
Further, when the ratio (M / N) is less than the predetermined condition range (lower limit threshold a) of the procedure 1 due to the execution of the procedure 2, at least the power-off standby system device that has fallen below is set to the power-on state. Change to a power-on standby system. As an example, the power-off standby device may be changed to a power-on standby device until the ratio (M / N) exceeds [lower limit threshold a + upper threshold b] / 2.

図１に戻って、記憶部４２は、ハードディスク等であり、物理サーバスペック情報４２１および物理サーバ負荷情報４２２を記憶している。
物理サーバスペック情報４２１は、図３に示すように、少なくとも、物理サーバ１０ごとに、物理サーバ識別番号、リソース情報、配置された仮想マシン、電源状態および種別を関連付けて記憶している。また、物理サーバ負荷情報４２２は、現用系装置から受信した負荷の状態に関する情報（例えば、ＣＰＵ使用率、メモリ使用率）を記憶している。 Returning to FIG. 1, the storage unit 42 is a hard disk or the like, and stores physical server specification information 421 and physical server load information 422.
As shown in FIG. 3, the physical server specification information 421 stores at least for each physical server 10 a physical server identification number, resource information, a virtual machine arranged, a power supply state, and a type in association with each other. The physical server load information 422 stores information (for example, CPU usage rate, memory usage rate) related to the load status received from the active system device.

物理サーバ識別番号の欄には、物理サーバ１０を識別する情報が記憶される。
リソース情報の欄には、一例として物理サーバ１０のＣＰＵコア数およびクロック周波数（ＧＨｚ）が記憶される。
配置された仮想マシンの欄には、配置されている仮想マシン２０を識別する情報が記憶される。
電源状態の欄には、電源がＯＮまたはＯＦＦのいずれの状態かが記憶される。
種別の欄には、現用系装置、電源ＯＮ予備系装置または電源ＯＦＦ予備系装置のいずれに該当するかが記憶される。 Information for identifying the physical server 10 is stored in the physical server identification number column.
As an example, the resource information column stores the number of CPU cores and the clock frequency (GHz) of the physical server 10.
In the placed virtual machine column, information for identifying the placed virtual machine 20 is stored.
The power status column stores whether the power is on or off.
The type column stores whether it corresponds to an active device, a power-on standby device, or a power-off standby device.

図１に戻って、通信部４３は、通信インタフェースであり、物理サーバ１０と情報の送受信を行う機能を有する。 Returning to FIG. 1, the communication unit 43 is a communication interface and has a function of transmitting and receiving information to and from the physical server 10.

次に、電源ＯＮ予備系装置の台数を調整するための処理フロー例について、図４を用いて説明する（適宜、図１参照）。
ステップＳ４０１では、物理サーバ電源状態決定部４１３は、現用系装置でリソース不足が発生したか否かを判定する。
リソース不足が発生したと判定した場合（ステップＳ４０１でＹｅｓ）、処理はステップＳ４０２へ進み、リソース不足が発生していないと判定した場合（ステップＳ４０１でＮｏ）、処理はステップＳ４０４へ進む。 Next, an example of a processing flow for adjusting the number of power-on standby system devices will be described with reference to FIG. 4 (see FIG. 1 as appropriate).
In step S401, the physical server power state determination unit 413 determines whether a resource shortage has occurred in the active device.
If it is determined that a resource shortage has occurred (Yes in step S401), the process proceeds to step S402. If it is determined that a resource shortage has not occurred (No in step S401), the process proceeds to step S404.

ステップＳ４０２では、物理サーバ電源状態決定部４１３は、現用系装置に変更する電源ＯＮ予備系装置を決定する。具体的には、前記手順２に示したように、物理サーバ電源状態決定部４１３は、現用系装置の合計スループット値Ｎに対して所定の係数ｃ（第１の所定の係数）を乗算して得られる、一定割合のスループット値を有する電源ＯＮ予備系装置を決定する。なお、当該電源ＯＮ予備系装置の台数は、１台に限られなくとも良く、当該スループット値を満足するように複数台が選択されても構わない。 In step S402, the physical server power state determination unit 413 determines a power-on standby system device to be changed to the active device. Specifically, as shown in the procedure 2, the physical server power state determination unit 413 multiplies the total throughput value N of the active device by a predetermined coefficient c (first predetermined coefficient). The obtained power-on standby system device having a certain ratio of throughput values is determined. Note that the number of power-on standby system devices is not limited to one, and a plurality of devices may be selected so as to satisfy the throughput value.

ステップＳ４０３では、物理サーバ電源状態決定部４１３は、当該電源ＯＮ予備系装置を現用系装置に変更する。具体的には、物理サーバ電源状態決定部４１３は、新たに現用系装置となった物理サーバ１０に対応する物理サーバスペック情報４２１の種別の欄の記載を、現用系装置に変更する。ステップＳ４０３の処理後に、処理はステップＳ４０７へ進む。 In step S403, the physical server power state determination unit 413 changes the power ON standby system device to the active system device. Specifically, the physical server power state determination unit 413 changes the description in the type column of the physical server specification information 421 corresponding to the physical server 10 that has newly become the active device to the active device. After the process of step S403, the process proceeds to step S407.

ステップＳ４０４では、物理サーバ電源状態決定部４１３は、現用系装置にて余剰リソースが発生したか否かを判定する。具体的には、物理サーバ電源状態決定部４１３は、仮想マシン配置先物理サーバ決定部４１１から、仮想マシン未配置の現用系装置の存在情報を受信し、受信した当該存在情報および物理サーバスペック情報４２１を基に仮想マシン未配置の現用系装置が所定数以上存在するかを判定する。そして、物理サーバ電源状態決定部４１３は、仮想マシン未配置の現用系装置が所定数以上存在すると判定した場合、現用系装置にて余剰リソースが発生したと判定する。また、他の具体例として、物理サーバ電源状態決定部４１３は、仮想マシン配置先物理サーバ決定部４１１から、仮想マシン未配置の現用系装置の存在情報を受信し、受信した当該存在情報および物理サーバスペック情報４２１を基に、前記手順２の具体例に示したように、仮想マシン未配置の現用系装置の合計スループット値Ｏが、前記値（Ｎ×ｄ）を超えると判定した場合、現用系装置にて余剰リソースが発生したと判定してもよい。
現用系装置にて余剰リソースが発生したと判定した場合（ステップＳ４０４でＹｅｓ）、処理はステップＳ４０５へ進み、現用系装置にて余剰リソースが発生していないと判定した場合（ステップＳ４０４でＮｏ）、処理は終了する。 In step S404, the physical server power state determination unit 413 determines whether or not a surplus resource has occurred in the active device. Specifically, the physical server power state determination unit 413 receives the presence information of the active device in which the virtual machine is not allocated from the virtual machine placement destination physical server determination unit 411, and the received presence information and physical server specification information. Based on 421, it is determined whether or not there are a predetermined number or more of active devices on which virtual machines are not arranged. If the physical server power supply state determination unit 413 determines that there are a predetermined number or more of active devices in which virtual machines are not arranged, the physical server power state determination unit 413 determines that surplus resources have occurred in the active device. As another specific example, the physical server power state determination unit 413 receives the presence information of the active device in which the virtual machine is not placed from the virtual machine placement destination physical server decision unit 411, and receives the received presence information and physical Based on the server specification information 421, as shown in the specific example of the procedure 2, when it is determined that the total throughput value O of the active system device in which the virtual machine is not arranged exceeds the value (N × d), It may be determined that surplus resources have occurred in the system device.
If it is determined that surplus resources have occurred in the active device (Yes in step S404), the process proceeds to step S405, and it is determined that surplus resources have not occurred in the active device (No in step S404). The process ends.

ステップＳ４０５では、物理サーバ電源状態決定部４１３は、電源ＯＮ予備系装置に変更する現用系装置を決定する。具体的には、前記手順２に示したように、仮想マシン未配置の現用系装置の合計スループット値Ｏが、前記値（Ｎ×ｄ）を超える場合、一定割合（Ｏ×ｄ×ｅ）の仮想マシン未配置の現用系装置を電源ＯＮ予備系装置に変更するように決定する。なお、当該仮想マシン未配置の現用系装置の台数は、１台に限られなくとも良く、当該比を超えないように複数台が選択されても構わない。 In step S405, the physical server power state determination unit 413 determines the active device to be changed to the power-on standby device. Specifically, as shown in the procedure 2, when the total throughput value O of the active device in which the virtual machine is not arranged exceeds the value (N × d), a certain ratio (O × d × e) It is determined to change the active system device in which the virtual machine is not allocated to the power-on standby system device. Note that the number of active devices in which the virtual machine is not arranged is not limited to one, and a plurality of active devices may be selected so as not to exceed the ratio.

ステップＳ４０６では、物理サーバ電源状態決定部４１３は、当該現用系装置を電源ＯＮ予備系装置に変更する。具体的には、物理サーバ電源状態決定部４１３は、新たに電源ＯＮ予備系装置となった物理サーバ１０に対応する物理サーバスペック情報４２１の種別の欄の記載を、電源ＯＮ予備系装置に変更する。ステップＳ４０６の処理後に、処理はステップＳ４０７へ進む。 In step S406, the physical server power state determination unit 413 changes the active system device to a power ON standby system device. Specifically, the physical server power state determination unit 413 changes the description in the type column of the physical server specification information 421 corresponding to the physical server 10 that has newly become the power ON standby system device to the power ON standby system device. To do. After the process of step S406, the process proceeds to step S407.

ステップＳ４０７では、物理サーバ電源状態決定部４１３は、電源ＯＮ予備系装置の台数が所定の条件範囲（第１の所定の条件範囲）を満たすか否かを判定する。具体的には、物理サーバ電源状態決定部４１３は、現用系装置のスループット値に対する電源ＯＮ予備系装置のスループット値の比率（Ｍ／Ｎ）が、前記手順３に示すように、ａ（下限閾値）≦Ｍ／Ｎ≦ｂ（上限閾値）の範囲にあるか否かを判定する。
所定の条件範囲を満たさないと判定した場合（ステップＳ４０７でＮｏ）、処理はステップＳ４０８へ進み、所定の条件範囲を満たすと判定した場合（ステップＳ４０７でＹｅｓ）、処理は終了する。 In step S407, the physical server power state determination unit 413 determines whether or not the number of power-on standby system devices satisfies a predetermined condition range (first predetermined condition range). Specifically, the physical server power state determination unit 413 determines that the ratio (M / N) of the throughput value of the power-on standby system device to the throughput value of the active device is a (lower threshold) as shown in the procedure 3 above. ) ≦ M / N ≦ b (upper limit threshold) is determined.
If it is determined that the predetermined condition range is not satisfied (No in step S407), the process proceeds to step S408. If it is determined that the predetermined condition range is satisfied (Yes in step S407), the process ends.

ステップＳ４０８では、物理サーバ電源状態決定部４１３は、前記手順３に示した処理を実行し、電源ＯＮ予備系装置の台数と電源ＯＦＦ予備系装置の台数とを調整する。具体的には、物理サーバ電源状態決定部４１３は、ステップＳ４０３およびステップＳ４０６を実行したことによる電源ＯＮ予備系装置の台数変更により、現用系装置のスループット値に対する電源ＯＮ予備系装置のスループット値の比率（Ｍ／Ｎ）が所定の条件範囲（ａ（下限閾値）≦Ｍ／Ｎ≦ｂ（上限閾値））の上限閾値ｂを超える場合、少なくとも超えた分の電源ＯＮ予備系装置を電源ＯＦＦ状態にして電源ＯＦＦ予備系装置に変更する。また、ステップＳ４０３およびステップＳ４０６を実行したことにより前記比（Ｍ／Ｎ）が所定の条件範囲（ａ（下限閾値）≦Ｍ／Ｎ≦ｂ（上限閾値））の下限閾値ａを下回る場合、少なくとも下回った分の電源ＯＦＦ予備系装置を電源ＯＮ状態にして電源ＯＮ予備系装置に変更する。そして、物理サーバ電源切替実行部４１４は、調整処理に対応するように、物理サーバ１０の電源のＯＮまたはＯＦＦの切り替えを実行する。また、物理サーバ電源状態決定部４１３は、当該調整処理に対応するように、物理サーバスペック情報４２１の電源状態の欄および種別の欄の記載を変更する。 In step S408, the physical server power state determination unit 413 executes the processing shown in the procedure 3 to adjust the number of power-on standby system devices and the number of power-off standby system devices. Specifically, the physical server power state determination unit 413 changes the throughput value of the power-on standby system device relative to the throughput value of the active system device by changing the number of power-on standby system devices by executing Steps S403 and S406. When the ratio (M / N) exceeds the upper limit threshold value b in a predetermined condition range (a (lower threshold value) ≦ M / N ≦ b (upper threshold value)), at least the excess power ON standby system is in the power OFF state. To change to a power-off standby system. Further, when the ratio (M / N) is less than the lower limit threshold a of a predetermined condition range (a (lower limit threshold) ≦ M / N ≦ b (upper limit threshold)) by executing step S403 and step S406, at least The power-off standby system device for the portion below the power-on state is turned on and changed to a power-on standby system device. Then, the physical server power supply switching execution unit 414 executes power ON / OFF switching of the physical server 10 so as to correspond to the adjustment process. Further, the physical server power state determination unit 413 changes the description of the power state column and the type column of the physical server specification information 421 so as to correspond to the adjustment processing.

（変形例）
前記説明では、負荷として物理サーバ１０のスループット値を用いる場合について説明したが、この変形例では、スループット値の代わりに、物理サーバ１０の台数を用いた場合で説明する。
＜手順１Ａ＞現用系装置の台数に応じて、所定の条件範囲を満たすように電源ＯＮ予備系装置の台数を決定する。例えば、現用系装置群３０の物理サーバ１０の台数をＰとし、電源ＯＮ予備系装置群３１の物理サーバ１０の台数をＱとする。そして、Ｐに対するＱの比（Ｑ／Ｐ）が、所定の条件範囲（第２の所定の条件範囲）内に入るようにする。つまり、ｆ（下限閾値）≦Ｑ／Ｐ≦ｇ（上限閾値）とする。この手順１Ａは、サーバ仮想化システム１００の初期設定に相当する。 (Modification)
In the above description, the case where the throughput value of the physical server 10 is used as the load has been described, but in this modification, the case where the number of physical servers 10 is used instead of the throughput value will be described.
<Procedure 1A> According to the number of active devices, the number of power-on standby devices is determined so as to satisfy a predetermined condition range. For example, the number of physical servers 10 in the active system group 30 is P, and the number of physical servers 10 in the power-on standby system group 31 is Q. Then, the ratio of Q to P (Q / P) is set to fall within a predetermined condition range (second predetermined condition range). That is, f (lower threshold) ≦ Q / P ≦ g (upper threshold). This procedure 1A corresponds to the initial setting of the server virtualization system 100.

＜手順２Ａ＞現用系装置の台数の変動に応じて、電源ＯＮ予備系装置を現用系装置に変更する、または仮想マシン未配置の現用系装置を電源ＯＮ予備系装置に変更する。
電源ＯＮ予備系装置を現用系装置に変更する場合、現用系装置の台数に所定の係数ｈ（第２の所定の係数）を乗算して、その乗算値の小数点以下を切り上げて求められる台数分の電源ＯＮ予備系装置を現用系装置に変更する。また、仮想マシン未配置の現用系装置を電源ＯＮ予備系装置に変更する場合、仮想マシン未配置の現用系装置の台数を現用系装置の台数で除算した比が所定の閾値ｋ（第２の所定の閾値）を超えないように、仮想マシン未配置の現用系装置を電源ＯＮ予備系装置に変更する。 <Procedure 2A> Depending on the change in the number of active devices, the power-on standby device is changed to the active device, or the active device in which no virtual machine is arranged is changed to the power-on standby device.
When changing the power-on standby system device to the active system device, the number of active system devices is multiplied by a predetermined coefficient h (second predetermined coefficient), and the number obtained by rounding up the decimal point of the multiplied value is obtained. Change the power-on standby system device to the active system device. In addition, when changing the active device without a virtual machine to a power-on standby device, a ratio obtained by dividing the number of active devices without a virtual machine by the number of active devices is a predetermined threshold k (second The active system device in which the virtual machine is not arranged is changed to a power-on standby system device so as not to exceed a predetermined threshold).

＜手順３Ａ＞手順３と同様である。すなわち、手順２Ａを実行したことによって電源ＯＮ予備系装置の台数が前記所定の条件範囲ｆ（下限閾値）≦Ｑ／Ｐ≦ｇ（上限閾値）（第２の所定の条件範囲）の上限閾値ｇを超える場合、超えた分の電源ＯＮ予備系装置を電源ＯＦＦ状態にして電源ＯＦＦ予備系装置に変更する。また、手順２Ａを実行したことによって電源ＯＮ予備系装置の台数が前記所定の条件範囲ｆ（下限閾値）≦Ｑ／Ｐ≦ｇ（上限閾値）（第２の所定の条件範囲）の下限閾値ｆを下回る場合、下回った分の電源ＯＦＦ予備系装置を電源ＯＮ状態にして電源ＯＮ予備系装置に変更する。 <Procedure 3A> Same as Procedure 3. That is, the upper limit threshold g of the predetermined condition range f (lower threshold) ≦ Q / P ≦ g (upper threshold) (second predetermined condition range) is obtained by executing the procedure 2A. Is exceeded, the power-on standby system device for the excess is turned off and changed to a power-off standby system device. Further, by executing the procedure 2A, the number of the power-on standby system devices becomes the lower limit threshold f within the predetermined condition range f (lower threshold) ≦ Q / P ≦ g (upper threshold) (second predetermined condition range). If the value is less than, the power-off standby device corresponding to the lower power is turned on and changed to a power-on standby device.

そして、電源ＯＮ予備系装置の台数を調整するための処理フローは、図４と同様であり、図４の説明に用いたスループット値の代わりに台数を用いて、手順２Ａ，３Ａに基づいて実行されればよい。 The processing flow for adjusting the number of standby power-on devices is the same as that shown in FIG. 4, and is executed based on procedures 2A and 3A using the number instead of the throughput value used in the description of FIG. It only has to be done.

以上、本実施形態および変形例の電源制御部４１２は、サーバ仮想化システム１００を構成する複数の物理サーバ１０に対して、仮想マシン２０が配置されて稼動している物理サーバ１０である現用系装置と、仮想マシン２０が未配置かつ電源ＯＮ状態の物理サーバ１０である電源ＯＮ予備系装置と、電源ＯＦＦ状態の物理サーバ１０である電源ＯＦＦ予備系装置と、を区別して、電源を制御する機能を有する。また、電源制御部４１２は、現用系装置の負荷に応じて、電源ＯＮ予備系装置のスループット値（または台数）に対する現用系装置のスループット値（または台数）の比が所定の条件範囲を満たすように決定する。また、電源制御部４１２は、サーバ仮想化システム１００を構成する複数の物理サーバ１０の中で、現用系装置および電源ＯＮ予備系装置以外の物理サーバ１０の電源をＯＦＦに変更する機能を有する。したがって、本実施形態のサーバ仮想化システム１００は、常に、適切な台数の電源ＯＮ予備系装置を備えているため、急な負荷の増加時にも、仮想マシン２０を配置して直ちに稼動させることができる。つまり、サーバ仮想化システム１００は、信頼性を保障することができる。また、サーバ仮想化システム１００は、現用系装置および電源ＯＮ予備系装置以外の物理サーバの電源をＯＦＦにすることにより、消費電力量を抑えることができる。 As described above, the power control unit 412 of the present embodiment and the modified example is the active system that is the physical server 10 in which the virtual machine 20 is arranged and operated with respect to the plurality of physical servers 10 configuring the server virtualization system 100. The power source is controlled by distinguishing between a power-on standby system device that is a physical server 10 in which the virtual machine 20 is not placed and is powered on, and a power-off standby system device that is a physical server 10 in a power-off state. It has a function. Further, the power supply control unit 412 makes the ratio of the throughput value (or the number of units) of the active system device to the throughput value (or the number of units) of the power-on standby system device satisfy a predetermined condition range according to the load of the active system device. To decide. The power control unit 412 has a function of turning off the power of the physical servers 10 other than the active device and the power-on standby device among the plurality of physical servers 10 configuring the server virtualization system 100. Therefore, since the server virtualization system 100 of this embodiment always includes an appropriate number of power-on standby system devices, the virtual machine 20 can be arranged and immediately operated even when a sudden load increases. it can. That is, the server virtualization system 100 can ensure reliability. Further, the server virtualization system 100 can reduce power consumption by turning off the power of physical servers other than the active device and the power-on standby device.

なお、本実施形態および変形例のサーバ仮想化システム１００では、電源制御部４１２をリソース調整装置４０の１つの機能として説明したが、電源制御部４１２および物理サーバスペック情報４２１が記憶される記憶部４２を備える電源制御装置（配備装置）として構成しても構わない。その際、電源制御装置（配備装置）は、リソース調整装置４０に内蔵されていても、リソース調整装置４０とは独立して通信可能に接続された別個の装置であっても構わない。 In the server virtualization system 100 according to the present embodiment and the modification, the power control unit 412 has been described as one function of the resource adjustment device 40. However, the power control unit 412 and the storage unit in which the physical server specification information 421 is stored. You may comprise as a power supply control apparatus (deployment apparatus) provided with 42. FIG. At this time, the power supply control device (deployment device) may be built in the resource adjustment device 40 or may be a separate device that is communicably connected to the resource adjustment device 40.

また、本実施形態では、電源ＯＮ予備系装置の台数を決定する際に、物理サーバ１０のスループット値を用いている理由は、物理サーバ１０のリソース情報の不揃いを考慮できるためである。
また、変形例では、電源ＯＮ予備系装置の台数を決定する際に、物理サーバ１０の台数を用いている理由は、各物理サーバ１０のリソース情報がほぼ均一の場合に、簡単に見積もれるためである。 In the present embodiment, the reason why the throughput value of the physical server 10 is used when determining the number of power-on standby devices is that the resource information of the physical server 10 can be taken into account.
Also, in the modification, the reason for using the number of physical servers 10 when determining the number of power-on standby systems is that it can be easily estimated when the resource information of each physical server 10 is almost uniform. It is.

また、第１の所定の係数（または第２の所定の係数）は、常に一定でなく、現用系装置のスループット値（または台数）の大きさに依存して、変化するようにしても構わない。また、第１の所定の閾値（または第２の所定の閾値）は、常に一定でなく、現用系装置のスループット値（または台数）の大きさに依存して、変化するようにしても構わない。 In addition, the first predetermined coefficient (or the second predetermined coefficient) is not always constant, and may be changed depending on the throughput value (or the number of units) of the active system apparatus. . In addition, the first predetermined threshold (or the second predetermined threshold) is not always constant, and may be changed depending on the throughput value (or the number of units) of the active system device. .

１０物理サーバ
１１リソース情報収集部
２０仮想マシン
３０現用系装置群
３１電源ＯＮ予備系装置群
３２電源ＯＦＦ予備系装置群
４０リソース調整装置
４１処理部
４２記憶部
４３通信部
１００サーバ仮想化システム
４１１仮想マシン配置先物理サーバ決定部
４１２電源制御部（配備装置）
４１３物理サーバ電源状態決定部
４１４物理サーバ電源切替実行部
４２１物理サーバスペック情報
４２２物理サーバ負荷情報 DESCRIPTION OF SYMBOLS 10 Physical server 11 Resource information collection part 20 Virtual machine 30 Active system apparatus group 31 Power supply ON standby system group 32 Power supply OFF backup system apparatus group 40 Resource adjustment apparatus 41 Processing part 42 Storage part 43 Communication part 100 Server virtualization system 411 Virtual Machine placement destination physical server determination unit 412 Power control unit (deployment device)
413 Physical server power state determination unit 414 Physical server power switch execution unit 421 Physical server specification information 422 Physical server load information

Claims

For a plurality of physical servers that constitute a server virtualization system and whose functions of the active device and the standby device can be switched , a power-on standby device that is a physical server in which a virtual machine is not allocated and is in a power-on state, A storage unit that stores the type of the physical server that distinguishes the active device that is a physical server on which the machine is placed and operates;
In accordance with the load of the active device, the number of the power ON standby devices is set so that the ratio of the throughput value of the active device to the throughput value of the power ON standby device satisfies the first predetermined condition range. A physical server power state determination unit that determines and stores the type of the physical server in the storage unit;
Among a plurality of physical servers constituting the server virtualization system, a physical server power switching execution unit that turns off the power of the physical servers other than the active device and the power ON standby device;
Equipped with a,
The physical server power state determination unit
When the active device that has not been allocated to a virtual machine after the description of the type stored in the storage unit is changed from the power-on standby device to the active device is changed to the power-on standby device, the virtual The storage unit stores the active device without the virtual machine so that the ratio obtained by dividing the throughput value of the active device without the machine by the throughput value of the active device does not exceed the first predetermined threshold. The description of the type is changed to the power-on standby device, and the ratio of the throughput value of the active device to the throughput value of the changed power-on standby device satisfies the first predetermined condition range. Change the description of the type stored in the storage unit to the power-off standby device that is a physical server in the power-off state. deployment device of the standby system device in a server virtualization environment, wherein <br/> that.

The physical server power state determination unit
When the power ON standby system device is changed to the active system device, the power ON standby system device having a throughput value obtained by multiplying the throughput value of the active device by a first predetermined coefficient is used as the active system device. The apparatus for deploying a standby system apparatus in the server virtualization environment according to claim 1, wherein the apparatus is changed to an apparatus.

For a plurality of physical servers that constitute a server virtualization system and whose functions of the active device and the standby device can be switched , a power-on standby device that is a physical server in which a virtual machine is not allocated and is in a power-on state, A storage unit that stores the type of the physical server that distinguishes the active device that is a physical server on which the machine is placed and operates;
In accordance with the load of the active device, the number of the power ON standby devices is determined so that the ratio of the number of the active devices to the number of the power ON standby devices satisfies the second predetermined condition range. A physical server power state determination unit that stores the type of the physical server in the storage unit;
Among a plurality of physical servers constituting the server virtualization system, a physical server power switching execution unit that turns off the power of the physical servers other than the active device and the power ON standby device;
Equipped with a,
The physical server power state determination unit
When the active device that has not been allocated to a virtual machine after the description of the type stored in the storage unit is changed from the power-on standby device to the active device is changed to the power-on standby device, the virtual Stored in the storage unit for the active device without the virtual machine so that the ratio of the number of the active device without the machine divided by the number of the active device does not exceed the second predetermined threshold. The description of the type is changed to the power-on standby system device, and the ratio of the number of the active system devices to the number of the power-on standby system devices after the change is surplus so as to satisfy the second predetermined condition range. A server virtualization environment , wherein the description of the type stored in the storage unit for the power-on standby system device is changed to a power-off standby device, which is a physical server in a power-off state. In Kicking deployment device of the standby system.

The physical server power state determination unit
When changing the power-on standby system device to the active system device, multiply the number of the active system devices by a first predetermined coefficient and round up the number after the decimal point of the multiplication value to obtain the number of power sources 4. The deployment apparatus for a standby system apparatus in a server virtualization environment according to claim 3 , wherein an ON standby system apparatus is changed to the active system apparatus.

A deployment device deployment method for controlling deployment of a standby system device in a server virtualization system composed of a plurality of physical servers capable of switching the functions of an active system device and a standby system device ,
The deployment device includes:
The physical server that distinguishes a power-on standby system device that is a physical server in which a virtual machine has not been allocated and is in a power-on state, and an active system device that is a physical server in which a virtual machine is allocated and operates with respect to the physical server A storage unit and a processing unit for storing the type of
The processor is
In accordance with the load of the active device, the number of the power ON standby devices is set so that the ratio of the throughput value of the active device to the throughput value of the power ON standby device satisfies the first predetermined condition range. Determining a physical server power supply state determining step for storing the physical server type in the storage unit;
A physical server power supply switching execution step of turning off the power of the physical servers other than the active device and the power ON standby device among the plurality of physical servers constituting the server virtualization system;
The execution,
The physical server power state determination step includes:
When the active device that has not been allocated to a virtual machine after the description of the type stored in the storage unit is changed from the power-on standby device to the active device is changed to the power-on standby device, the virtual The storage unit stores the active device without the virtual machine so that the ratio obtained by dividing the throughput value of the active device without the machine by the throughput value of the active device does not exceed the first predetermined threshold. The description of the type is changed to the power-on standby device, and the ratio of the throughput value of the active device to the throughput value of the changed power-on standby device satisfies the first predetermined condition range. change in the power OFF auxiliary system device is a physical server that has a power OFF state to the description of the type stored in the storage unit for the surplus the power oN auxiliary system devices Deployment wherein the.

A deployment device deployment method for controlling deployment of a standby system device in a server virtualization system composed of a plurality of physical servers capable of switching the functions of an active system device and a standby system device ,
The deployment device includes:
The physical server that distinguishes a power-on standby system device that is a physical server in which a virtual machine has not been allocated and is in a power-on state, and an active system device that is a physical server in which a virtual machine is allocated and operates with respect to the physical server A storage unit and a processing unit for storing the type of
The processor is
In accordance with the load of the active device, the number of the power ON standby devices is determined so that the ratio of the number of the active devices to the number of the power ON standby devices satisfies the second predetermined condition range. , A physical server power state determination step for storing the type of the physical server in the storage unit;
A physical server power supply switching execution step of turning off the power of the physical servers other than the active device and the power ON standby device among the plurality of physical servers constituting the server virtualization system;
The execution,
The physical server power state determination step includes:
When the active device that has not been allocated to a virtual machine after the description of the type stored in the storage unit is changed from the power-on standby device to the active device is changed to the power-on standby device, the virtual Stored in the storage unit for the active device without the virtual machine so that the ratio of the number of the active device without the machine divided by the number of the active device does not exceed the second predetermined threshold. The description of the type is changed to the power-on standby system device, and the ratio of the number of the active system devices to the number of the power-on standby system devices after the change is surplus so as to satisfy the second predetermined condition range. A deployment method , wherein the description of the type stored in the storage unit for the power-on standby system device is changed to a power-off standby system device that is a physical server in a power-off state .