JP2015165361A - Virtual computer management device, virtual computer management method, and virtual computer management program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a load due to processing at the time of logging on to a virtual computer without causing a shortage of resources in a server that executes virtual computers that do not always use identical resources.SOLUTION: A virtual computer management device 1 includes: state storage means 10 that stores the amount of resources used by virtual computers 20 and the priorities of the virtual computers, for the virtual computers which are executed by an execution device 2 capable of retracting the virtual computers to virtual computer storage means 23; request reception means 11 that receives a request for connection to a connection destination virtual computer; shortage determination means 12 that determines the amount of insufficient resources for the case where a connection destination virtual computer is restored, on the basis of the amount of unused resources of the execution device 2 and the amount of resources used by the retracted connection destination virtual computer; and selection means that selects a selection virtual computer from the unretracted virtual computer 20 so that the total amount of resources used by the selection virtual computer is more than the amount of insufficient resources.

Description

  The present invention relates to a technique for managing virtual machines.

  When a thin client terminal always connects to a virtual machine that runs on the server, the server needs to perform a process associated with the logon each time the connection is made. Examples of processing associated with logon include user authentication, reading of a user profile, and activation of an application activated at logon. As a method for reducing processing associated with logon, for example, there is a method of disconnecting only the connection between the thin client terminal and the virtual machine instead of performing logoff when the user finishes using the virtual machine. In this method, the virtual machine that has been disconnected from the thin client terminal continues to operate with the user logged on. When the thin client terminal reconnects to the virtual machine that has once logged on, the thin client terminal is reconnected to the operating virtual machine. At that time, no logon is performed. However, if all the virtual machines are continuously operated, for example, a memory necessary for the server to operate the virtual machines is insufficient. An example of a method for alleviating such a server's memory shortage is described in, for example, Patent Document 1.

  The user environment save control system described in Patent Document 1 saves user environment information for realizing an environment for each user in a virtual PC (Personal Computer) in a storage device. The user environment saving control system assigns a priority to each user. When a user whose user environment information has been saved accesses the virtual PC and there is no free virtual PC, the user environment save control system is assigned by a user whose user environment information has not been saved. Select the user with the lowest priority. Then, the user environment saving control system prepares an empty virtual PC by saving the user environment information of the selected user. Then, the user environment saving control system loads the user environment information of the accessed user into the prepared free virtual PC.

JP 2011-134219 A

  If the amount of server resources used by a virtual PC is set differently for each user, for example, the amount of resources required by the virtual PC may increase as the user using the virtual PC changes. There is sex. In this case, if there is no unused resource that can be newly assigned to the virtual PC before the user using the virtual PC changes, it is conceivable that resources are insufficient by changing the user.

  With the technique of Patent Document 1, when the amount of server resources required by the virtual PC differs for each user, for example, it is not possible to prevent a shortage of server resources.

  A main object of the present invention is to provide a virtual machine management device capable of reducing a load caused by processing at the time of logging on to a virtual machine without causing a server running a virtual machine that does not necessarily use the same resources to run out of resources. It is to provide.

  The virtual machine management apparatus according to the present invention stores, for a virtual machine executed by an execution apparatus capable of saving a virtual machine in a virtual machine storage unit, a resource amount used by the virtual machine and a priority order of the virtual machine State storage means, request reception means for receiving a connection request to a connection destination virtual machine among the virtual machines, the amount of unused resources detected in the execution device, and saved in the virtual machine storage means Based on the resource amount used by the connection destination virtual computer, the shortage specifying means for specifying the shortage resource amount when the connection destination virtual computer is restored, and the virtual that has not been saved based on the priority order The total amount of the resources used by the selected virtual machine from the computer becomes larger than the insufficient resources. Comprising selecting means for urchin selected, the.

  The virtual machine management method according to the present invention relates to a virtual machine executed by an execution device capable of saving a virtual machine in a virtual machine storage unit, and determines a resource amount used by the virtual machine and a priority level of the virtual machine. Stored in storage means, request receiving means for receiving a connection request to a connection destination virtual machine among the virtual machines, the amount of unused resources detected in the execution device, and saved in the virtual machine storage means Based on the resource amount used by the connection destination virtual computer, the resource shortage amount when the connection destination virtual computer is restored is identified, and the selected virtual machine is selected from the virtual machines that have not been saved based on the priority order. The computer is selected so that the total amount of the resources used by the selected virtual computer is greater than the insufficient resources.

  The virtual machine management program according to the present invention relates to a virtual machine executed by an execution device capable of saving a virtual machine to a virtual machine storage unit, a resource amount used by the virtual machine, and a priority order of the virtual machines State storage means for storing, request receiving means for receiving a connection request to a connection destination virtual machine among the virtual machines, the amount of unused resources detected in the execution device, and saving to the virtual machine storage means Based on the resource amount used by the connection destination virtual machine that has been set, the shortage specifying means for specifying the shortage resource amount when the connection destination virtual machine is restored, and on the basis of the priority order, are saved. There is no virtual machine selected from the virtual machine, and the total amount of the resources used by the selected virtual machine is insufficient Selection means for selecting to be greater than the source, to operate.

  The present invention has an effect of reducing the load caused by processing at the time of logging on to a virtual machine without causing a server running a virtual machine whose required resources are not necessarily the same to run out of resources.

FIG. 1 is a block diagram illustrating an example of a configuration of an information processing system 100 according to the first embodiment. FIG. 2 is a block diagram illustrating an example of the configuration of the information processing system 100A according to the first embodiment. FIG. 3 is a diagram illustrating an example of a state table stored in the state storage unit 10. FIG. 4 is a diagram illustrating an example of the used resource amount portion in the state table stored in the state storage unit 10. FIG. 5 is a diagram illustrating an example of user priorities stored in the state storage unit 10. FIG. 6 is a diagram illustrating an example of data values related to user connections stored in the state storage unit 10. FIG. 7 is a flowchart illustrating an example of the operation of the virtual machine management device 1 according to the first embodiment. FIG. 8 is a flowchart illustrating an example of the operation of the virtual machine execution device 2 according to the first embodiment. FIG. 9 is a block diagram illustrating an example of the configuration of the virtual computer 20 according to the first embodiment. FIG. 10 is a block diagram illustrating an example of a functional configuration of the virtual machine 20 according to the first embodiment. FIG. 11 is a block diagram illustrating an example of a functional configuration of the virtual machine 20 according to the first embodiment. FIG. 12 is a flowchart illustrating an example of the operation of the virtual machine 20 when a logoff request is received. FIG. 13 is a diagram illustrating the configuration of the virtual machine management device 1A according to the second embodiment. FIG. 14 is a diagram illustrating an example of a configuration of a computer 1000 that can realize the virtual machine management apparatus 1, the virtual machine management apparatus 1A, the virtual machine execution apparatus 2, and the virtual machine execution apparatus 2A.

  Next, an embodiment of the present invention will be described.

<First Embodiment>
First, a first embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram illustrating an example of a configuration of an information processing system 100 according to the present embodiment.

  Referring to FIG. 1, the information processing system 100 includes a virtual machine management device 1, a virtual machine execution device 2, a terminal device 3, and a user management device 4. The information processing apparatus 100 may include a plurality of terminal devices 3. The virtual machine management device 1, the virtual machine execution device 2, and the user management device 4 are connected to each other. The terminal device 3 is connected to the virtual computer management device 1 and the virtual computer execution device 2. Any two or more of the virtual machine management device 1, the virtual machine execution device 2, and the user management device 4 may be the same device. For example, the virtual computer execution device 2 may operate as the virtual computer management device 1 by including the virtual computer management device 1. In the description of each embodiment of the present invention, the virtual machine execution device 2 and the virtual machine execution device 2A are also simply referred to as execution devices.

  FIG. 2 is a block diagram illustrating an example of the configuration of the information processing system 100A according to the present embodiment. In the information processing system 100A, the virtual machine execution device 2 includes a virtual machine management device 1 and a user management device 4. In other respects, the information processing system 100A is the same as the information processing system 100.

  The virtual machine management device 1 includes a state storage unit 10, a request reception unit 11, a shortage identification unit 12, a selection unit 13, a priority order determination unit 14, and an output unit 15.

  The virtual machine execution device 2 includes a virtual machine execution unit 21 that executes the virtual machine 20, a save unit 22, a virtual machine storage unit 23, a state acquisition unit 24, a request execution unit 25, and a state transmission unit 26. Including.

  The user management device 4 includes a log storage unit 40 and an authentication unit 41.

  The virtual machine 20 is a virtual computer emulated in the virtual machine execution device 2. The virtual machine 20 is generally called a virtual machine or a virtual machine. When the virtual machine 20 is an emulated PC, the virtual machine 20 is also called a virtual PC.

  The virtual machine execution unit 21 executes the virtual machine 20. That is, the virtual machine execution unit 21 emulates the virtual machine 20. The virtual machine execution unit 21 is realized, for example, by a processor of the virtual machine execution device 21 and a control program for realizing the virtual machine 20 executed by the processor. Such a virtual machine execution unit 21 is generally called a hypervisor.

  When the virtual computer 20 is operating in the virtual computer execution device 2, a memory used for the virtual computer 20 to operate as a computer is allocated from the memory of the virtual computer execution device 2 to the virtual computer 20. .

  When the save unit 22 receives the save instruction and the identifier of the virtual machine 20 that is the save target, the save unit 22 performs a save process on the virtual machine 20. That is, the saving unit 22 stores the data loaded in the memory allocated to the virtual computer 20 in the virtual computer storage unit 23 in association with the virtual computer 20. Furthermore, the saving unit 22 releases the memory allocated to the virtual machine 20 that has been saved. The save processing is, for example, the above-described processing of storing the data of the virtual machine 20 loaded in the memory of the virtual machine execution device 2 in the virtual machine storage unit 23 and releasing the memory allocated to the virtual machine 20 It is. In the following description, performing the saving process on the virtual machine 20 is also referred to as “saving the virtual machine 20”.

  Further, when the saving unit 22 receives the return instruction and the identifier of the virtual computer 20 to be returned, the saving unit 22 performs a return process on the virtual computer 20. That is, the saving unit 22 first secures in the memory of the virtual machine execution device 2 a memory used for the virtual machine 20 to be restored to operate as a computer. Then, the saving unit 22 loads again the data of the virtual machine 20 to be restored, which is stored in the virtual machine storage unit 23, into the secured memory. The restoration process is, for example, the above-described process for securing the memory used by the virtual machine 20 to be restored and the process for loading the data of the virtual machine 20 into the secured memory. In the following description, performing the restoration process on the virtual machine 20 is also referred to as “returning the virtual machine 20”.

  The virtual machine storage unit 23 stores data of the virtual machine 20 that has been loaded into the memory of the virtual machine execution device 2. In the following description, storing the data of the virtual machine 20 that has been loaded into the memory of the virtual machine execution device 2 will be referred to as “store the virtual machine 20”.

  The state acquisition unit 24 further specifies the amount of unused resources of the virtual machine execution device 2. The unused resource is a resource of the virtual machine execution device 2 that is not assigned to any virtual machine 20 and can be assigned to any virtual machine 20. The resource is, for example, a memory, a processor, a network bandwidth, a storage, or the like. The state acquisition unit 24 may receive the amount of unused resources from, for example, the virtual machine execution unit 21. Then, the state acquisition unit 24 transmits the identified amount of unused resources to the state transmission unit 26.

  The request execution unit 25 receives the identifier of the selected virtual computer that is the virtual computer 20 selected by the selection unit 13 as the virtual computer 20 to be saved. The request execution unit 25 transmits the save instruction and the received identifier of the selected virtual machine to the save unit 22. The save instruction, the received identifier of the selected virtual machine, and the received save unit 22 save the selected virtual machine. When the selected virtual machine is connected to any one of the terminal devices 3, the request execution unit 25 may transmit a save preparation instruction to the selected virtual machine. Each virtual machine 20 only needs to be designed to disconnect from the terminal device 3 when receiving a save preparation instruction.

  The request execution unit 25 further receives the identifier of the terminal device 3 and the identifier of the connection destination virtual computer 20 that is the connection destination virtual computer 20 in the connection request transmitted by the terminal device 3. If the connection destination virtual machine has been saved, the request execution unit 25 transmits the return instruction and the identifier of the connection destination virtual machine to the save unit 22. The saving unit 22 that has received the return instruction and the identifier of the connection destination virtual machine returns the connection destination virtual machine.

  The request execution unit 25 further connects the terminal device 3 and the connection destination virtual machine. For example, the request execution unit 25 may connect the terminal device 3 and the connection destination virtual computer by transmitting the identifier of the connection destination virtual computer to the terminal device 3 that has transmitted the connection request. The terminal device 3 that has received the identifier of the connection destination virtual machine connects to the connection destination virtual machine.

  The status transmission unit 26 transmits the amount of unused resources of the virtual machine execution device 2 specified by the status acquisition unit 24 to the status reception unit 16 of the virtual machine management device 1.

  The status transmission unit 26 further transmits the status of each virtual machine 20 to the status reception unit 16 of the virtual machine management device 1. The state of the virtual machine 20 includes, for example, a “connection state” of the virtual machine 20 and a “location” of the virtual machine 20. The state of the virtual machine 20 may include the amount of resources used by the virtual machine 20. The state of the virtual machine 20 may include the operation state of the virtual machine 20. The state of the virtual machine 20 further includes a “user ID (Identifier)” associated with the virtual machine 20. However, the status transmission unit 26 does not have to transmit the “user ID”. “User ID” is an identifier of a user. The user whose user ID is associated with the virtual machine 20 is, for example, a user to which the virtual machine 20 is assigned. In the following description, the fact that the user ID of the user is associated with the virtual machine 20 will be referred to as “the user is associated with the virtual machine 20”. In this embodiment, one virtual machine 20 and a user are associated one-on-one. However, a plurality of users may be associated with one virtual machine 20. One user may be associated with a plurality of virtual machines 20.

  The “connection state” of the virtual machine 20 represents, for example, the state of connection between the virtual machine 20 and the terminal device 3 used by the user associated with the virtual machine 20. The connection state of the virtual machine 20 is, for example, “disconnected”, “connected”, or “unused”. “Disconnect”, “connect”, and “unused” may be different values determined in advance. “Disconnected” indicates that the connection between the virtual computer 20 and the terminal device 3 used by the user associated with the virtual computer 20 is disconnected. “Connection” represents that the virtual machine 20 and the terminal device 3 used by the user associated with the virtual machine 20 are connected. “Unused” indicates that there is no user associated with the virtual machine 20.

  For example, when the terminal device 3 is connected to the virtual machine 20, the connection state of the virtual machine 20 changes. For example, when the terminal device 3 disconnects from the virtual computer 20, the connection state of the virtual computer 20 changes. For example, when the request execution unit 25 transmits a save preparation instruction to the virtual machine 20 connected to the terminal device 3, the connection state of the virtual machine 20 changes.

  When the connection state of the virtual machine 20 changes, for example, the virtual machine 20 whose connection state has changed may transmit the connection state to, for example, the state acquisition unit 24. When the state acquisition unit 24 receives the connection state from any of the virtual machines 20, the state acquisition unit 24 may transmit the received connection state to the state transmission unit 26 in association with the virtual machine 20 that has transmitted the connection state. As will be described later, the state transmission unit 26 transmits the received connection state associated with the virtual machine 20 to the state reception unit 16. The state receiving unit 16 that has received the connection state associated with the virtual machine 20 updates the connection state of the virtual machine 20 stored in the state storage unit 10. That is, the state acquisition unit 24 that has received the connection state from the virtual computer 20 updates the connection state of the virtual computer 20 stored in the state storage unit 10 via the state transmission unit 26 and the state reception unit 16. .

  The “location” of the virtual machine 20 represents a place where data loaded into a memory used for the virtual machine 20 to operate as a computer exists. When the virtual machine 20 is not saved, the data loaded into the memory used for the virtual machine 20 to operate as a computer exists in the memory of the virtual machine execution device 2. In that case, the value of “location” of the virtual machine 20 is, for example, “memory”. When the virtual machine 20 is evacuated, data loaded into a memory used for the virtual machine 20 to operate as a computer is stored in the virtual machine storage unit 23. In that case, the value of “location” of the virtual machine 20 is, for example, “disk”. As described above, the “location” of the virtual machine 20 is, for example, “memory” or “disk”. The “memory” and “disk” may be different from each other as determined in advance.

  For example, when the saving unit 22 saves the virtual computer 20 and when the virtual computer 20 is restored, the “location” of the virtual computer 20 that has been saved or restored may be transmitted to the status transmission unit 26. The state transmission unit 26 that has received the “location” of the virtual computer 20 transmits the received “location” of the virtual computer 20 to the state reception unit 16. As will be described later, the status receiving unit 16 of the “location” of the virtual computer 20 updates the “location” of the virtual computer 20 stored in the status storage unit 10.

  The used resource amount is the amount of resources used by the virtual machine 20 among the resources of the virtual machine execution device 2. The virtual machine execution device 2 may be set so that the amount of resources used by the virtual machine 20 is selected from a plurality of predetermined amounts. In that case, it may be any value representing a predetermined amount.

  For example, the virtual machine execution unit 21 may specify the resource amount of each virtual machine 20. The virtual machine execution unit 21 may transmit the identified resource amount of each virtual machine 20 to the state acquisition unit 24. Then, the state acquisition unit 24 may transmit the identified resource amount of each virtual machine 20 to the state transmission unit 26. The state transmitting unit 26 that has received the resource amount of the virtual computer 20 may transmit the received resource amount to the state receiving unit 16 in association with the virtual computer 20 that uses the resource amount. The state receiving unit 16 may update the used resource amount stored in the state storage unit 10. The used resource amount of each virtual machine 20 may be determined in advance. In this case, for example, the administrator of the virtual machine execution device 2 may store the used resource amount of each virtual machine 20 in the state storage unit 10 in advance.

  The operation states are, for example, “idle state” and “processing”. The operation state represents, for example, whether or not an operation on the virtual computer 20 by a user of the terminal device 3 connected to the virtual computer 20 is continued. “Idle state” represents, for example, that there is no user operation on the virtual machine 20 for a predetermined time or more. “Processing” indicates, for example, that the user has performed an operation on the virtual machine 20 within the past predetermined time. The operating state may be defined by other definitions.

  For example, the virtual machine execution unit 21 may specify the operation state of each virtual machine 20. The virtual machine execution unit 21 may transmit the identified operation state of each virtual machine 20 to the state transmission unit 26. Alternatively, the state acquisition unit 24 may acquire the operation state from each virtual machine 20. In that case, for example, each virtual machine 20 may transmit the operation state to the state acquisition unit 24. And the state acquisition part 24 should just transmit the operation state of each virtual machine 20 to the state transmission part 26. FIG.

  Next, the user management device 4 will be described.

  When the terminal device 3 connects to the virtual machine 20, the authentication unit 41 authenticates a user who uses the terminal device 3 based on a request from the virtual machine 20, for example. The authentication unit 41 authenticates the user not only when the user starts using the virtual computer 20 that has not been used, but also when the terminal device 3 reconnects to the virtual computer 20 that has been disconnected. Do.

  Then, the authentication unit 41 stores a record related to the authentication performed, that is, an authentication record in the log storage unit 40. The authentication record includes, for example, the user ID of the authenticated user and the time information when the authentication is performed. The time information may include, for example, date, time, day of the week, and the like. The authentication record may include the virtual machine ID of the virtual machine 20 that has been authenticated.

  When the authentication result is successful, the terminal device 3 used by the user connects to the virtual machine 20. Therefore, the record related to the authentication with a successful result is a record of the connection to the virtual machine 20. The authentication unit 41 may store the above-described authentication record in the log storage unit 40 only when the result of the authentication is successful. Alternatively, the authentication unit 41 may store the above-described authentication record further including the result of authentication in the log storage unit 40.

  The authentication unit 41 may further store, in the log storage unit 40, the time when the connection between the terminal device 3 used by the user and the virtual machine 20 is disconnected after the user is authenticated. . In that case, the virtual machine 20 whose connection has been disconnected by the terminal device 3 may transmit, for example, the user ID of the user of the terminal device 3 whose connection has been disconnected and the time at which the disconnection was performed to the authentication unit 41. Then, the authentication unit 41, for example, based on which authentication result the connection made based on the received user ID and time and the virtual machine ID of the virtual machine 20 that transmitted the user ID and time is disconnected. What is necessary is just to specify. The authentication part 41 should just store the time when the connection was cut | disconnected in the log memory | storage part 40 as an authentication record of identified authentication.

  The log storage unit 40 stores the above-described authentication record. As described above, the record related to the authentication with a successful result is a connection record to the virtual machine 20. When the terminal device 3 is connected to the virtual computer 20, the user of the terminal device 3 uses the virtual computer 20. Therefore, the above-described authentication record is also a usage record of the virtual machine 20 by the user. When the authentication record includes the time when the authentication is performed and the time when the connection is disconnected, the time zone in which the user has used the virtual machine 20 can be specified based on these times.

  Next, the virtual machine management device 1 will be described.

  The state storage unit 10 stores the state of each virtual machine 20 in association with the virtual machine ID that is the identifier of the virtual machine 20. The state storage unit 10 may store the state of each virtual machine 20 in the form of a state table that is a table including the state of each virtual machine 20.

  As described above, the state of the virtual machine 20 includes, for example, a “user ID” that is an identifier of a user associated with the virtual machine 20, a “connection state” of the virtual machine 20, and a “location” of the virtual machine 20. "including. The state of the virtual machine 20 may include the “used resource amount” of the virtual machine 20. The state of the virtual machine 20 may include an “operation state” of the virtual machine 20. The state of the virtual machine 20 further includes the priority order of the virtual machine 20. The priority order of the virtual machines 20 is determined by the priority order determination unit 14 as will be described later.

  FIG. 3 is a diagram illustrating an example of a state table stored in the state storage unit 10. In the example illustrated in FIG. 3, the state table includes a virtual machine ID, a user ID, a connection state, a used resource amount, an operation state, a location, and a priority order. In the example illustrated in FIG. 3, the used resource amount is represented by two state values “high” and “low”. In this case, each state value may be associated with one or more combinations of numerical values representing the resource type and the resource amount.

  FIG. 4 is a diagram illustrating an example of the used resource amount portion in the state table stored in the state storage unit 10. In the example illustrated in FIG. 4, the used resource amount is represented by the memory capacity and the number of processors. The amount of used resources may be represented only by the capacity of the memory, for example.

  The state receiving unit 16 receives the state of each virtual machine 20 described above transmitted by the state transmitting unit 26. The state receiving unit 16 stores the received state of each virtual machine 20 in the state storage unit 10. The state receiving unit 16 may update the above-described state table.

  The state reception unit 16 further receives the state of the virtual machine execution device 2 from the state transmission unit 26. The state of the virtual machine execution device 2 received by the state reception unit 16 is the amount of unused resources described above. The state receiving unit 16 transmits the amount of unused resources to the shortage specifying unit 12.

  The priority order determination unit 14 determines the priority order of each virtual machine 20 based on the record of connections made to the virtual machine 20 stored in the log storage unit 40. The priority order determination unit 14 stores the priority order determined for the virtual computer 20 in the state storage unit 10 in association with the virtual computer 20.

  As described above, in this embodiment, the virtual machine 20 and the user are associated one-on-one. Therefore, the priority order determination unit 14 may set the priority order determined for the user as the priority order of the virtual machines 20 associated with the user.

  In that case, the priority order determination part 14 should just determine the priority order of each user first according to the frequency of the connection with respect to the virtual machine 20, for example. For example, the priority order determination unit 14 determines the priority order of each user so that a user with a higher connection frequency has a higher priority order. The frequency of connection is, for example, the number of connections for each user, which is tabulated in a past fixed period. The frequency of connection may be, for example, the number of connections for each user, which is tabulated for each day of the week in a fixed period in the past. The connection frequency may be, for example, the number of connections for each user, which is aggregated for each time period in a certain past period. The connection frequency may be, for example, the number of times the user has used the virtual computer 20 for each user, which is aggregated for each time period in the past certain period.

  Then, the priority order determination unit 14 may determine the priority order of each virtual machine 20 so that the priority order of the virtual machine 20 becomes equal to the priority order of the user associated with the virtual machine 20.

  On the other hand, the information processing system 100 may be designed so that the virtual computer 20 and the user are not necessarily associated one-to-one.

  In such a case, for example, the priority order determination unit 14 may determine the priority order of the virtual machines 20 based on the frequency of connections to the virtual machines 20 that are aggregated for each virtual machine 20 in a certain past period. For example, the priority order determination unit 14 may determine the priority order of each virtual machine 20 so that the virtual machine 20 having a higher connection frequency has a higher priority order. The connection frequency may be, for example, the number of connections for each virtual machine 20 that is aggregated for each day of the week in a past fixed period. The connection frequency may be, for example, the number of connections for each virtual machine 20 that is tabulated for each time period in a certain past period. The connection frequency may be, for example, the number of users who have used the virtual computer 20 for each virtual computer 20 and are aggregated by time period in a certain past period.

  When the priority order varies depending on the day of the week, the priority order determination unit 14 may determine the priority order according to the change of the day of the week and store the determined priority order in the state storage unit 10. When the priority order varies depending on the time zone, the priority order determination unit 14 may determine the priority order according to the change of the time zone and store the determined priority order in the state storage unit 10.

  The priority order determination unit 14 may store the user priority order, which is the priority order determined for the user, in the state storage unit 10.

  FIG. 5 is a diagram illustrating an example of user priorities stored in the state storage unit 10.

  The priority order determination unit 14 further stores data values relating to user connections, such as aggregated values collected in the process of determining the user priority order, in the state storage unit 10, and data values used to determine the user priority order. It may be stored.

  FIG. 6 is a diagram illustrating an example of data values related to user connections stored in the state storage unit 10. In the example illustrated in FIG. 6, the data value stored in the state storage unit 10 includes the presence / absence of logon of each user and the number of logons of each day in the week before the day for determining the user priority.

  The request receiving unit 11 receives a connection request for the virtual machine 20 from the terminal device 3. The request reception unit 11 specifies a connection destination virtual computer that is the virtual computer 20 that is requested to be connected by the received connection request. The connection information only needs to include a data value that can identify the connection destination virtual machine.

  The data value that can specify the connection destination virtual machine may be, for example, a user ID. In this case, for example, the request receiving unit 11 specifies the virtual computer 20 associated with the user ID included in the connection request as the connection destination virtual computer. In this case, if there is no virtual machine 20 associated with the user ID included in the connection request, the request reception unit 11 selects, for example, one of the unused virtual machines 20 as the connection destination virtual machine. To do. At that time, the request receiving unit 11 may select a connection destination virtual machine from the virtual machines 20 whose “location” is “memory”. If there is no virtual computer 20 whose “location” is “memory”, the request receiving unit 11 may select a connection destination virtual computer from the virtual computers 20 whose “location” is “disk”.

  The connection request may include both a user ID and a virtual machine ID. In this case, the request receiving unit 11 may select the virtual computer 20 specified by the virtual computer ID included in the connection request as the connection destination virtual computer. If there is no virtual machine 20 specified by the virtual machine ID included in the connection request, the request reception unit 11 selects any of the unused virtual machines 20 as the connection destination virtual machine as described above. Good.

  When selecting one of the unused virtual machines 20 as the connection destination virtual machine, the request reception unit 11 stores the user ID in the state storage unit 10 in association with the selected connection destination virtual machine. For example, the request receiving unit 11 may update the user ID associated with the selected connection destination virtual machine in the state table stored in the state storage unit 10.

  The shortage specifying unit 12 specifies the shortage resource amount based on the received amount of unused resources and the used resource amount of the connection destination virtual computer stored in the state storage unit 10. The insufficient resource amount is the amount of resources of the virtual machine execution device 2 that is insufficient when the connection destination virtual machine is operated without changing the “location” where the data of each virtual machine 20 other than the connection destination virtual machine exists. Amount. For example, when the connection destination virtual machine is saved and the connection destination virtual machine is restored, it is necessary to newly allocate resources used by the connection destination virtual machine to the connection destination virtual machine. When the used resource amount of the connection destination virtual computer is smaller than the unused resource amount, the resource used by the connection destination virtual computer can be allocated from the unused resource. Therefore, the shortage resource amount is zero. On the other hand, when the used resource amount of the connection destination virtual computer is larger than the unused resource amount, the amount of resources obtained by subtracting the unused resource amount from the used resource amount of the connection destination virtual computer is insufficient. If the “location” of the connection destination virtual machine is “memory”, the connection destination virtual machine has not been saved. Therefore, there is no need to restore the connection destination virtual machine. Therefore, there is no need to newly allocate resources to the connection destination virtual machine. Therefore, the shortage resource amount is zero.

  When the insufficient resource amount is not zero, the selection unit 13 selects the virtual machine 20 to be saved based on the priority order of each virtual machine 20. As described above, the virtual machine 20 selected by the selection unit 13 is represented as a selected virtual machine.

  Based on the connection state and operation state of the virtual machine 20, the selection unit 13 determines whether the “location” is “memory” in the virtual machine 20 so that the total amount of used resources of the selected virtual machine exceeds the shortage resource quantity. One or more selected virtual machines may be selected from the above.

  The selection unit 13 may assign a status order to each virtual machine 20 based on the connection state and the operation state of the virtual machine 20. And the selection part 13 may select a selection virtual machine further using a state order | rank. The status order is, for example, an order that represents the degree of the degree of influence that a user associated with the virtual machine 20 receives when the virtual machine 20 is evacuated. For example, the selection unit 13 may assign a status order to the virtual machine 20 by the following method. The selection unit 13 may give the status order to the virtual machine 20 by another method.

  For example, when the connection state of the virtual machine 20 is “unused”, there is no user associated with the virtual machine 20. Therefore, even if the virtual machine 20 whose connection state is “unused” is saved, the user is not affected. The selection unit 13 may give the lowest state order to the virtual machine 20 whose connection state is “unused”.

  There is a possibility that the user of the virtual machine 20 whose connection state is “connected” continues the operation on the virtual machine 20 via the terminal device 3. On the other hand, the virtual machine 20 whose connection state is “disconnected” is not connected to the terminal device 3. Therefore, there is no possibility that the user of the virtual machine 20 whose connection state is “disconnected” continues the operation on the virtual machine 20 via the terminal device 3. Therefore, when the virtual machine 20 is evacuated, the influence of the user is greater for the virtual machine 20 whose connection state is “connected” than for the virtual machine 20 whose connection state is “disconnected”. The selection unit 13 may assign a status order lower than the status order of the virtual machine 20 whose connection state is “connected” to the virtual machine 20 whose connection state is “disconnected”.

  Further, the user of the virtual machine 20 whose operation state is “processing” continues the operation on the virtual machine 20. On the other hand, the user of the virtual machine 20 whose operation state is “idle state” has not operated on the virtual machine 20 for at least a predetermined time. Therefore, when the virtual machine 20 is evacuated, the influence of the user is greater for the virtual machine 20 whose operation state is “processing” than for the virtual machine 20 whose operation state is “idle state”. The selection unit 13 may give a status order lower than the status order of the virtual machine 20 whose operation state is “processing” to the virtual machine 20 whose operation state is “idle state”.

  The selection unit 13 selects a virtual machine 20 having the lowest state order among the virtual machines 20 whose location is “memory”. Then, the selection unit 13 selects the selected virtual computer from the virtual computer 20 that is the selection target, for example, as follows.

  The selection unit 13 selects the virtual machine 20 having the lowest priority among the virtual machines 20 to be selected as the selected virtual machine. When there are a plurality of virtual machines 20 having the lowest priority, the selection unit 13 selects one of the virtual machines 20 having the lowest priority.

  When the total amount of used resources of the selected virtual computer that has already been selected is larger than the insufficient resource amount, the selection unit 13 ends the selection of the selected virtual computer. When the total amount of used resources of the selected virtual machines that have already been selected is smaller than the shortage resource quantity, the selection unit 13 selects the selected virtual machines from the virtual machines 20 that are the selection targets in descending order of priority. Can be repeated.

  Even if all the virtual machines 20 that are the selection targets are selected, if the total amount of used resources of the selected selected virtual machines is smaller than the shortage resource amount, the selection unit 13 sets the virtual machines 20 that are the selection targets. The virtual machine 20 having the second lowest state order is added. The selection unit 13 selects the selected virtual computer from the virtual computer 20 that is a new selection target as described above.

  The selection unit 13 may repeat the selection of the selected virtual machine and the addition of the virtual machine 20 to be selected until the total amount of used resources of the selected selected virtual machine becomes larger than the insufficient resource quantity.

  As described above, when the status order is assigned to each virtual machine 20, the selected virtual machine is first selected from the virtual machines 20 whose connection status is “unused” and whose location is “memory”. If the selected virtual machine is further selected, the selected virtual machine is then selected from the virtual machine 20 whose connection state is “disconnected” and whose location is “memory”. When the selected virtual machine is further selected, the selected virtual machine is then selected from the virtual machine 20 whose connection state is “connected”, whose operation state is “idle state”, and whose location is “memory”. The

  The selection unit 13 may select the selected virtual computer by another method.

  When the selection unit 13 selects the selected virtual computer, the selection unit 13 transmits the identifier of the selected virtual computer to the output unit 15. In addition, the selection unit 13 transmits the identifier of the connection destination virtual computer to the output unit 15.

  When receiving the identifier of the selected virtual machine, the output unit 15 transmits the received identifier of the selected virtual machine to the request execution unit 25 of the virtual machine execution device 2. Further, the output unit 15 transmits the identifier of the terminal device 3 that has transmitted the connection request and the identifier of the connection destination virtual computer to the request execution unit 25.

  The output unit 15 may transmit, to the request execution unit 25, a data value indicating that the selected virtual computer is a target to be saved in association with the identifier of the selected virtual computer, for example. When the received virtual machine 20 identifier is associated with a data value indicating that the virtual machine 20 is the target of saving, the request execution unit 25 selects the virtual machine 20 that is the target of saving. What is necessary is just to determine with it. The output unit 15 may transmit a data value indicating that the connection destination virtual machine is a connection destination based on the connection request to the request execution unit 25 in association with the identifier of the connection destination virtual machine. When the received data identifier indicating that the virtual computer 20 is a connection destination based on the connection request is associated with the received virtual computer 20 identifier, the request execution unit 25 associates the virtual computer 20 with the data value. What is necessary is just to determine that 20 is a connection destination virtual machine.

  The output unit 15 may transmit the identifier of the selected virtual machine to the request execution unit 25 without associating it with the identifier of the terminal device 3. The output unit 15 may transmit the identifier of the connection destination virtual computer to the request execution unit 25 in association with the identifier of the terminal device 3. If the received identifier of the virtual computer 20 is not associated with the identifier of the terminal device 3, the request execution unit 25 may determine that the virtual computer 20 is the selected virtual computer. If the received identifier of the virtual computer 20 is associated with the identifier of the terminal device 3, the request execution unit 25 may determine that the virtual computer 20 is a connection destination virtual computer. And the request | requirement execution part 25 should just recognize that the terminal device 3 specified by the identifier is the terminal device 3 which transmitted the connection request.

  When the virtual machine management device 1 and the virtual machine execution device 2 are the same device, the output unit 15, the status reception unit 16, and the status transmission unit 26 may not exist. In this case, the selection unit 13 may transmit the identifier of the connection destination virtual computer, the identifier of the selected virtual computer, and the identifier of the terminal device 3 to the request execution unit 25 instead of the output unit 15. Further, the saving unit 22, the state acquisition unit 24, and the virtual machine execution unit 21 may write the state of each virtual machine 20 into the state storage unit 10 instead of transmitting the state to the state transmission unit 26. Furthermore, the state acquisition unit 24 may transmit the unused resource amount to the shortage specifying unit 12 instead of the state transmission unit 26.

  Next, the operation of the virtual machine management device 1 of this embodiment will be described in detail with reference to the drawings.

  FIG. 7 is a flowchart showing an example of the operation of the virtual machine management apparatus 1 of this embodiment.

  First, the request receiving unit 11 receives a connection request from the terminal device 3 (step S101).

  The request receiving unit 11 specifies a connection destination virtual computer that is the virtual computer 20 that is requested to be connected by the received connection request (step S102).

  The selection unit 13 determines whether or not the identified connection destination virtual machine is operating (step S103). If the “location” of the connection destination virtual machine is “memory” in the state table stored in the state storage unit 10, the selection unit 13 may determine that the connection destination virtual machine is operating. When the “location” of the connection destination virtual machine is “memory”, the connection destination virtual machine is not saved, and the terminal device 3 can directly access the connection destination virtual machine.

  When the connection destination virtual machine is operating (Yes in step S103), the selection unit 13 transmits the identifier of the connection destination virtual machine to the virtual machine execution device 2 via, for example, the output unit 15 (step S109). .

  In step S103, if the “location” of the connection destination virtual computer is “disk” in the state table stored in the state storage unit 10, the selection unit 13 determines that the connection destination virtual computer is not operating. Good. When the “location” of the connection destination virtual machine is “disk”, the connection destination virtual machine is evacuated. In that case, in order for the terminal device 3 to access the connection destination virtual computer, it is necessary to restore the connection destination virtual computer.

  When the connection destination virtual computer is not operating (No in step S103), the shortage specifying unit 12 uses the virtual computer execution device 2 unused from the state acquisition unit 24 via the state transmission unit 26 and the state reception unit 16, for example. A resource amount is received (step S104).

  The shortage specifying unit 12 may request an unused resource amount from the state acquisition unit 24 via the state transmission unit 26 and the state reception unit 16, for example. The state acquisition unit 24 acquires an unused resource amount in response to a request for an unused resource amount, and uses the acquired unused resource amount via, for example, the state transmission unit 26 and the state reception unit 16. Just send it to. The state acquisition unit 24 may periodically acquire the unused resource amount, and may transmit the acquired unused resource amount to the shortage specifying unit 12 through the state transmission unit 26 and the state reception unit 16, for example.

  The shortage specifying unit 12 specifies a shortage resource amount that is a shortage of resources for the virtual machine execution device 2 to operate the connection destination virtual machine (step S105). That is, the shortage specifying unit 12 specifies the resource amount of the virtual computer execution device 2 that is insufficient when the virtual computer execution device 2 restores the saved connection destination virtual computer.

  When the shortage resource amount is zero, that is, when there is no shortage of resources (No in step S106), the operation of the virtual machine management device 1 proceeds to step S109.

  If the insufficient resource amount is not zero, that is, if the resource is insufficient (Yes in step S106), the operation of the virtual machine management device 1 proceeds to step S107.

  As described above, the selection unit 13 selects the virtual computer 20 to be evacuated from the operating virtual computer 20 based on the insufficient resource amount and the priority order of the operating virtual computer 20 (step S107). As described above, the operating virtual machine 20 is a virtual machine 20 that has not been saved. In the state table stored in the state storage unit 10, the “location” of the virtual machine 20 in operation is “memory”. As described above, the virtual computer 20 selected as the virtual computer 20 to be saved is referred to as a selected virtual computer.

  For example, the selection unit 13 transmits the identifier of the selected selected virtual machine to the virtual machine execution device 2 via the output unit 15 (step S108).

  Next, the operation of the virtual machine execution device 2 according to this embodiment when the terminal device 3 transmits a connection request to the virtual machine management device 1 will be described in detail with reference to the drawings.

  FIG. 8 is a flowchart showing an example of the operation of the virtual machine execution device 2 of this embodiment. When the terminal apparatus 3 transmits a connection request to the virtual machine management apparatus 1, if the virtual machine management apparatus 1 has selected the selected virtual machine, the virtual machine management apparatus 1 transmits the identifier of the selected virtual machine. The virtual machine management apparatus 1 further transmits the identifier of the connection destination virtual machine and the identifier of the terminal apparatus 3 that has transmitted the connection request.

  First, the request execution unit 25 receives the identifier of the selected virtual machine from the selection unit 13 of the virtual machine management apparatus 1 via, for example, the output unit 15 (step S201).

  As described above, when any of the operating virtual machines 20 needs to be saved in order for the virtual machine execution device 2 to operate the connection destination virtual machine, the virtual machine management device 1 saves the virtual machine 20 to be saved. Select the selected virtual machine. If the virtual machine management apparatus 1 has selected the selected virtual machine, the virtual machine management apparatus 1 transmits the identifier of the selected virtual machine.

  When the connection destination virtual machine operates without saving the operating virtual machine 20, the virtual machine management apparatus 1 does not select the selected virtual machine. If the virtual machine management apparatus 1 has not selected the selected virtual machine, the virtual machine management apparatus 1 does not transmit the identifier of the selected virtual machine.

  When the request execution unit 25 does not receive the identifier of the selected virtual machine (No in step S202), the operation of the virtual machine execution device 2 proceeds to step S204.

  When the request execution unit 25 receives the identifier of the selected virtual machine (Yes in step S202), the request execution unit 25 transmits a save instruction and the identifier of the selected virtual machine to the save unit 22.

  The saving unit 22 that has received the save instruction and the identifier of the selected virtual machine saves the selected virtual machine in the virtual machine storage unit 23 (step S203). The operation of the virtual machine execution device 2 proceeds to step S204 after step S203.

  In step S204, the request execution unit 25 receives the identifier of the connection destination virtual machine and the identifier of the terminal device 3 (step S204).

  When the connection destination virtual computer is saved in the virtual machine storage unit 23 (Yes in step S205), the request execution unit 25 transmits a return instruction and an identifier of the connection destination virtual computer to the save unit 22.

  The saving unit 22 that has received the return instruction and the identifier of the connection destination virtual machine returns the connection destination virtual machine (step S206). The operation of the virtual machine execution device 2 proceeds to step S207 after step S206.

  When the connection destination virtual machine is not saved in the virtual machine storage unit 23 (No in step S205), the operation of the virtual machine execution device 2 proceeds to step S207.

  In step S207, the request execution unit 25 connects the terminal device 3 that has received the connection request to the connection destination virtual computer (step S207).

  The request execution unit 25 may connect the terminal device 3 that has received the connection request and the connection destination virtual computer, for example, by transmitting the identifier of the connection destination virtual computer to the terminal device 3 that has received the connection request. The terminal device 3 that has received the identifier of the virtual machine 20 may be connected to the virtual machine 20.

  Next, the virtual machine 20 will be described in detail with reference to the drawings.

  FIG. 9 is a block diagram illustrating an example of the configuration of the virtual machine 20 of the present embodiment. Referring to FIG. 9, in the virtual machine 20, a guest OS 202 is operating. The guest OS 202 is the OS of the virtual machine 20. In the virtual machine 20, an agent 201 is operating. The agent 201 is software software when operating under the control of the guest OS 202. In the virtual machine 20, an application program started by a user who uses the virtual machine 20 may be operating. The agent 201 operates as a logoff detection unit 203, a disconnection unit 204, and a notification unit 205 described below.

  FIG. 10 is a block diagram illustrating an example of a functional configuration of the virtual computer 20 according to the present embodiment. In FIG. 10, the virtual machine management device 1, the virtual machine execution device 2, the terminal device 3, and the terminal device 3 are further drawn. However, in FIG. 10, the components of the virtual machine management device 1 other than the state storage unit 10 and the state reception unit 16 are omitted. Furthermore, the components of the virtual machine execution device 2 other than the virtual machine 20, the status acquisition unit 24, and the status transmission unit 26 are omitted.

  Referring to FIG. 10, the virtual machine 20 includes a logoff detection unit 203, a communication disconnection unit 204, and a notification unit 205.

  The logoff detection unit 203 detects a logoff request transmitted from the terminal device 3 to the virtual machine 20.

  The disconnecting unit 204 disconnects the connection between the virtual computer 20 and the terminal device 3 when a logoff request transmitted from the terminal device 3 to the virtual computer 20 is detected.

  When the connection between the virtual computer 20 and the terminal device 3 is disconnected, the notification unit 205 notifies the state acquisition unit 24 that the connection between the virtual computer 20 and the terminal device 3 has been disconnected. To do.

  As described above, the state acquisition unit 24 that has received information that the connection between the virtual machine 20 and the terminal device 3 has been disconnected is stored in the state storage unit 10 via the state transmission unit 26 and the state reception unit 16. The connection state of the virtual machine 20 is updated.

  FIG. 11 is a block diagram illustrating an example of a functional configuration of the virtual computer 20 according to the present embodiment. In the example illustrated in FIG. 11, the virtual machine management device 1 is included in the virtual machine execution device 2.

  When the virtual machine management apparatus 1 is included in the virtual machine execution apparatus 2, the state acquisition unit 24 that has received a disconnection between the virtual machine 20 and the terminal device 3 stores it in the state storage unit 10. The connection state of the virtual machine 20 may be directly updated.

  Next, the operation of the virtual machine 20 when the virtual machine 20 receives a logoff request will be described in detail with reference to the drawings.

  FIG. 12 is a flowchart illustrating an example of the operation of the virtual machine 20 when a logoff request is received.

  First, the logoff detection unit 203 detects a logoff request transmitted from the terminal device 3 (step S301). When the logoff request is not detected (No in step S302), the logoff detection unit 203 continues to detect the logoff request (step S301).

  When the logoff request is detected (Yes in Step S302), the disconnecting unit 204 disconnects the connection between the virtual computer 20 and the terminal device 3 (Step S303). Even if the terminal device 3 transmits a logoff request, the virtual machine 20 does not perform logoff processing.

  When the connection between the virtual computer 20 and the terminal device 3 is disconnected, the notification unit 205 notifies the state acquisition unit 24 that the connection between the virtual computer 20 and the terminal device 3 has been disconnected. (Step S304).

  The state acquisition unit 24 that has received information that the connection between the virtual computer 20 and the terminal device 3 has been disconnected is stored in the state storage unit 10 via the state transmission unit 26 and the state reception unit 16. The connection state of the virtual machine 20 is updated. When the virtual machine management apparatus 1 is included in the virtual machine execution apparatus 2, the state acquisition unit 24 that has received a disconnection between the virtual machine 20 and the terminal device 3 stores it in the state storage unit 10. The connection state of the virtual machine 20 may be directly updated.

  In the present embodiment described above, the virtual machine execution device 2 that executes the virtual machines 20 whose required resources are not necessarily the same does not run out of resources, and the load caused by the processing when logging on to the virtual machines 20 is reduced. There is an effect that can be done.

  The reason is that the shortage specifying unit 12 calculates the resource amount of the virtual machine execution device 2 that is insufficient when the connection destination virtual machine requested to be connected by the connection request operates in the virtual machine execution device 2. . Then, the selection unit 13 selects the virtual machine 20 to be evacuated so that the virtual machine execution device 2 does not run out of resources even if the connection destination virtual machine operates based on the insufficient resource amount and the priority order of the virtual machines 20. Because it does.

  A user who uses the virtual computer 20 via the terminal device 3 can disconnect the connection between the virtual computer 20 and the terminal device 3 instead of logging off from the virtual computer 20. In this case, since the user has not logged off from the virtual machine 20, when the user next uses the virtual machine 20, the virtual machine 20 does not need to perform processing associated with logon. That is, it is possible to reduce a load caused by processing at the time of logon.

  However, if the number of virtual machines 20 that continue to operate with the user logged on increases, the resources of the virtual machine execution device 2 that executes the virtual machines 20 may be insufficient.

  If the saving unit 22 that saves the virtual machine 20 in the virtual machine storage unit 23 can save the virtual machine 20 so that the resources of the virtual machine execution device 2 are not short, the resources of the virtual computer execution device 2 are not short. For example, when the connection destination virtual machine requested to be connected by the terminal device 3 is saved, if the unused resources of the virtual machine execution device 2 are insufficient, the resources are insufficient when the connection destination virtual machine is restored. . In order to prevent a shortage of resources, instead of restoring the connection destination virtual machine, if any of the virtual machines 20 is to be saved, if the resources used by the connection destination virtual machine are more than the resources used by the virtual machine 20 to be saved, the resource May be insufficient.

  On the other hand, the selection unit 13 causes the virtual to be evacuated so that more resources are not used by evacuating the virtual machine 20 than resources that are insufficient by evacuating the virtual machine execution apparatus 2 without evacuating the virtual machine 20. The computer 20 is selected. Therefore, even if the connection destination virtual machine that has been saved is restored by saving the selected virtual machine selected by the selection unit 13, the resources of the virtual machine execution device 2 are not insufficient. In this case, even if the amount of resources used by the virtual machine 20 is different, the resources of the virtual machine execution device 2 are not insufficient.

<Second Embodiment>
Next, a second embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 13 is a diagram showing the configuration of the virtual machine management device 1A of this embodiment.

  Referring to FIG. 13, the virtual machine management apparatus 1 </ b> A has a resource amount used by the virtual machine 20 for the virtual machine 20 executed by the virtual machine execution apparatus 2 that can save the virtual machine 20 in the virtual machine storage unit 23. And a status storage unit 10 for storing the priority order of the virtual machines 20, a request receiving unit 11 for receiving a connection request to a connection destination virtual machine among the virtual machines 10, and detection in the virtual machine execution device 2 Based on the amount of unused resources that has been used and the amount of resources used by the connection destination virtual machine saved in the virtual machine storage unit 23, the amount of resource shortage when the connection destination virtual machine is restored is identified And the selected virtual machine from the virtual machines 20 that have not been saved based on the priority order. Comprises a selection unit 13 the total of the amount of resources that the virtual machine uses is selected to be greater than the insufficient resources, the. As described above, the virtual machine execution device 2 is also simply referred to as “execution device 2”.

  The present embodiment described above has the same effect as the first embodiment. The reason is the same as the reason for the effect of the first embodiment.

  The virtual machine management apparatus 1, the virtual machine management apparatus 1A, the virtual machine execution apparatus 2, and the virtual machine execution apparatus 2A are respectively a computer and a program for controlling the computer, dedicated hardware, or a program for controlling the computer and the computer. It can be realized by a combination of dedicated hardware.

  FIG. 14 is a diagram illustrating an example of a configuration of a computer 1000 that can realize the virtual machine management apparatus 1, the virtual machine management apparatus 1A, the virtual machine execution apparatus 2, and the virtual machine execution apparatus 2A. Referring to FIG. 14, a computer 1000 includes a processor 1001, a memory 1002, a storage device 1003, and an I / O (Input / Output) interface 1004. The computer 1000 can access the recording medium 1005. The memory 1002 and the storage device 1003 are storage devices such as a RAM (Random Access Memory) and a hard disk, for example. The recording medium 1005 is, for example, a storage device such as a RAM or a hard disk, a ROM (Read Only Memory), or a portable recording medium. The storage device 1003 may be the recording medium 1005. The processor 1001 can read and write data and programs from and to the memory 1002 and the storage device 1003. The processor 1001 can access, for example, the terminal device 3 and the user management device 4 via the I / O interface 1004. The processor 1001 can access the recording medium 1005. The recording medium 1005 stores a program that causes the computer 1000 to operate as the virtual machine management apparatus 1, the virtual machine management apparatus 1A, the virtual machine execution apparatus 2, or the virtual machine execution apparatus 2A.

  The processor 1001 stores, in the memory 1002, a program stored in the recording medium 1005 that causes the computer 1000 to operate as the virtual machine management apparatus 1, the virtual machine management apparatus 1A, the virtual machine execution apparatus 2, or the virtual machine execution apparatus 2A. Load it. Then, when the processor 1001 executes the program loaded in the memory 1002, the computer 1000 operates as the virtual machine management apparatus 1, the virtual machine management apparatus 1A, the virtual machine execution apparatus 2, or the virtual machine execution apparatus 2A. .

  The request receiving unit 11, the shortage specifying unit 12, the selecting unit 13, the priority order determining unit 14, the output unit 15, the virtual machine executing unit 21, the saving unit 22, the state acquiring unit 24, the request executing unit 25, and the state transmitting unit 26 are For example, it can be realized by a dedicated program that can be read from a recording medium 1005 that stores the program into the memory 1002 and that can realize the functions of each unit, and a processor 1001 that executes the program. Further, the state storage unit 10 and the virtual machine storage unit 23 can be realized by a memory 1002 included in the computer 1000 or a storage device 1003 such as a hard disk device. Alternatively, the state storage unit 10, the request reception unit 11, the shortage identification unit 12, the selection unit 13, the priority order determination unit 14, the output unit 15, the virtual computer execution unit 21, the save unit 22, the virtual computer storage unit 23, and the state acquisition unit 24, part or all of the request execution unit 25 and the state transmission unit 26 may be realized by a dedicated circuit that realizes the function of each unit.

  The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1, 1A virtual machine management apparatus 2, 2A virtual machine execution apparatus 3 Terminal apparatus 4 User management apparatus 10 State memory | storage part 11 Request receiving part 12 Insufficient identification part 13 Selection part 14 Priority determination part 15 Output part 16 State receiving part 20 Virtual Computer 21 Virtual computer execution unit 22 Save unit 23 Virtual computer storage unit 24 Status acquisition unit 25 Request execution unit 26 Status transmission unit 40 Log storage unit 41 Authentication unit 100, 100A Information processing system 201 Agent 202 Guest OS
203 Logoff Detection Unit 204 Disconnection Unit 205 Notification Unit 1000 Computer 1001 Processor 1002 Memory 1003 Storage Device 1004 I / O Interface 1005 Recording Medium

Claims (10)

State storage means for storing the amount of resources used by the virtual machine and the priority order of the virtual machines with respect to the virtual machine executed by the execution device capable of saving the virtual machine in the virtual machine storage means;
Request receiving means for receiving a connection request to a connection destination virtual machine among the virtual machines;
Insufficient resources when the connection destination virtual machine is restored based on the unused resource amount detected in the execution device and the resource amount used by the connection destination virtual machine saved in the virtual machine storage unit A shortage identifying means for identifying the resource amount;
Selection means for selecting a selected virtual machine from the virtual machines that have not been saved based on the priority order so that the total amount of the resources used by the selected virtual machine is greater than the insufficient resources;
A virtual machine management device comprising: Based on a record of connections made to the virtual machine stored in the log storage means, the priority order of the virtual machines is determined, and the determined priority order is associated with the virtual machine and stored in the state storage means Prioritization means for
The virtual machine management device according to claim 1. The state storage means stores an operation state indicating whether or not an operation is performed on the virtual computer in association with the virtual computer,
The virtual machine management apparatus according to claim 1, wherein the selection unit further selects the selected virtual machine based on the operation state. A terminal that transmits the connection request, the execution device, and the virtual machine management device according to claim 1,
The execution device is
Saving the selected virtual machine in a virtual machine storage means, and further restoring the connection destination virtual machine saved in the virtual machine storage means;
The virtual computer storage means;
Request execution means for transmitting the identifier of the connection destination virtual machine to the terminal connected to the virtual machine that has received the identifier;
An information processing system comprising: With respect to a virtual machine executed by an execution device that can evacuate the virtual machine to the virtual machine storage means, the resource amount used by the virtual machine and the priority order of the virtual machines are stored in the state storage means,
Request receiving means for receiving a connection request to a connection destination virtual machine among the virtual machines;
Insufficient resources when the connection destination virtual machine is restored based on the unused resource amount detected in the execution device and the resource amount used by the connection destination virtual machine saved in the virtual machine storage unit Identify the amount of resources,
Based on the priority, select the selected virtual machine from the virtual machines that have not been saved, so that the total amount of the resources used by the selected virtual machine is greater than the shortage resource,
Virtual computer management method. Based on a record of connections made to the virtual machine stored in the log storage means, the priority order of the virtual machines is determined, and the determined priority order is associated with the virtual machine and stored in the state storage means To
The virtual machine management method according to claim 5. In association with the virtual machine, an operation state indicating whether or not an operation is performed on the virtual machine is stored in the state storage unit,
The virtual computer management method according to claim 5, further comprising: selecting the selected virtual computer based on the operation state. Computer
State storage means for storing the amount of resources used by the virtual machine and the priority order of the virtual machines with respect to the virtual machine executed by the execution device capable of saving the virtual machine in the virtual machine storage means;
Request receiving means for receiving a connection request to a connection destination virtual machine among the virtual machines;
Insufficient resources when the connection destination virtual machine is restored based on the unused resource amount detected in the execution device and the resource amount used by the connection destination virtual machine saved in the virtual machine storage unit A shortage identifying means for identifying the resource amount;
Selection means for selecting a selected virtual machine from the virtual machines that have not been saved based on the priority order so that the total amount of the resources used by the selected virtual machine is greater than the insufficient resources;
Virtual machine management program to run. Computer
Based on a record of connections made to the virtual machine stored in the log storage means, the priority order of the virtual machines is determined, and the determined priority order is associated with the virtual machine and stored in the state storage means Prioritization means for
The virtual machine management program according to claim 8, which is operated as described above. Computer
The state storage means for storing an operation state indicating whether or not an operation is performed on the virtual computer in association with the virtual computer;
Further, the selection means for selecting the selected virtual machine based on the operation state;
The virtual machine management program according to claim 8 or 9, which is operated as described above.

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