JP7794729B2 - Virtual desktop management system and virtual desktop management method - Google Patents

Description

The present invention relates to a virtual desktop management system and a virtual desktop management method.

Companies and other organizations implement security risk reduction measures for business devices, such as terminals used by employees for work, to prevent the unauthorized use of business data stored on business devices in the event of theft or loss.

One method for reducing security risks is a method called virtual desktops, in which the functions and data of business devices are consolidated and managed in a data center such as the cloud, and then accessed via a network. Virtual desktops can be implemented in several ways, including having one employee occupy a physical machine, or running multiple virtual machines on a physical machine, with one employee occupying one virtual machine. Regarding how to allocate multiple virtual machines on multiple physical machines, methods are being considered for efficient allocation that take into account differences in resource usage, such as the CPU (Central Processing Unit) used by each virtual machine.

Patent Document 1 proposes a method for reducing the impact of other virtual machines running on the same physical machine in a virtual environment where multiple virtual machines are running on a single physical machine by preventing virtual machines with overlapping types of hardware processing (CPU, disk I/O, network I/O) that have high processing loads from running on the same physical machine.

Patent Document 2 also proposes a method for creating and deleting a virtual desktop environment based on the user's schedule information, thereby allowing a client computer that has issued a remote connection request to immediately use a virtual desktop environment without wasting resources on the server computer that provides the terminal service.

JP 2012-198631 A JP 2006-91954 A

One method is to run one or more virtual desktops on a single virtual machine, with each user having exclusive use of one of the virtual desktops. With this method, each user performs their work using the virtual desktop assigned to them. The virtual machine must be running while one or more users of the virtual desktops running on that virtual machine are using it.

In other words, one or more users start work using a virtual desktop assigned to them on a single virtual machine, and then shut down the virtual desktop when work is finished. However, if all users do not shut down their virtual desktops, the virtual machine must remain running, which results in an extended virtual machine operating time.

Extending the operating time of a virtual machine results in unnecessary consumption of resources such as CPU, memory, and network resources. Furthermore, when using cloud virtual machines on a pay-as-you-go basis, the amount charged varies depending on the operating time of the virtual machine, so minimizing the operating time of the virtual machine becomes an issue.

Furthermore, information processing equipment such as CPUs consume electricity, and in data centers and other locations, more electricity than the information processing equipment uses may be wasted in order to cool the equipment.

Conventional technology focuses on the placement of virtual machines on physical machines, and does not consider the placement of virtual desktops on virtual machines. Furthermore, even if the proposed method of conventional technology is applied to the placement of virtual machines, it does not take into account the virtual machine placement that depends on the length of user usage time, which is unique to virtual desktops, and therefore cannot be applied to reducing operating time.

Furthermore, there is technology that consolidates running virtual machines and dynamically changes the number of running physical machines through live migration, which moves running virtual machines to other physical machines. However, the virtual desktops used by users do not support live migration, and it is not possible to dynamically change the number of running virtual machines by moving a running virtual desktop to another virtual machine.

It is also possible to consolidate virtual desktops by stopping the virtual desktop used by a user and then restarting it on another virtual machine, or to forcibly release virtual desktop resources according to the user's schedule, as in Patent Document 2. However, stopping a virtual desktop means that the user is temporarily unable to use it, and forcibly moving a virtual desktop can result in the loss of unsaved data, which impacts user convenience.

The objective of this invention is to minimize the operating time of virtual machines without affecting the convenience of virtual desktop users.

A virtual desktop management system for managing connections to virtual desktops, comprising:
This problem is solved by a virtual desktop management system that includes a server device on which multiple virtual machines run, a user device equipped with a virtual desktop connection unit that requests allocation to the virtual desktop, and a management device that receives a request from the virtual desktop connection unit and allocates the virtual desktop to the virtual machines divided based on the usage time period of the virtual desktop.

According to the present invention, users with similar usage start and end times are assigned to the same virtual machine, thereby reducing the operating time of the virtual machine without affecting user convenience.

1 is a diagram illustrating an example of a hardware configuration of a virtual desktop arrangement system according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating an example of a management device according to an embodiment of the present invention. 1 is a block diagram of an example of a user device according to an embodiment of the present invention; FIG. 2 is a block diagram illustrating an example of a server device according to an embodiment of the present invention. FIG. 2 is a diagram illustrating the relationship between a server device, a virtual machine group, and a virtual desktop in an embodiment of the present invention. 10 is an example of user group list data according to an embodiment of the present invention. 10 is an example of user list data according to an embodiment of the present invention. 10 is an example of virtual machine group list data according to an embodiment of the present invention. 10 is an example of virtual machine list data according to an embodiment of the present invention. 10 is an example of usage history data according to an embodiment of the present invention. 10 is an example of terminal user data in an embodiment of the present invention. 10 is a flowchart illustrating an example of an operation at the start of use of a virtual desktop according to an embodiment of the present invention. 10 is an example of a user ID input screen according to an embodiment of the present invention. 10 is an example of a planned use time input screen according to an embodiment of the present invention. 10 is a flowchart illustrating an example of an operation performed when the use of a virtual desktop is terminated in an embodiment of the present invention.

An embodiment of the present invention will be described below using Figures 1 to 15.

First, the hardware configuration of a virtual desktop layout system according to an embodiment of the present invention will be described using Figures 1 to 11.

Figure 1 is a diagram illustrating the overall hardware configuration of a virtual desktop arrangement system in an embodiment. A management device 10 is connected to a network 13. A user device 11 is connected to the network 13 and can communicate with the management device 10. An administrator 14 can view and edit data on the management device 10. A user 15 is a user of the user device 11. A server device 12 is a device on which a virtual machine runs, is connected to the network 13, and can communicate with the management device 10 and the user device 11.

Figure 2 is an example block diagram showing the configuration of the management device 10. The management device 10 is composed of a processor 21, memory 22, a communication unit 23, an input/output unit 24, a storage unit 25, an internal signal line 26, a monitor 27, a keyboard 28, and a mouse 29.

The processor 21 executes programs stored in the memory unit 25. The memory unit 25 is a hard disk or non-volatile memory, and stores programs and data. The memory 22 stores programs to be executed and temporary data. The input/output unit 24 is a device that controls output to the monitor 27 and input from the keyboard 28 and mouse 29.

The communication unit 23 performs network communication with other devices. The storage unit 25 stores programs and data for implementing the virtual desktop layout system in this embodiment. The programs stored include an OS program 201 and a management program 202.

The data stored includes user group list data 203, user list data 204, virtual machine group list data 205, virtual machine list data 206, and usage history data 207. The OS program 201 on the storage unit 25 is loaded into the memory 22 and executed. The OS program 201 controls the input/output unit 24 and loads data from the storage unit 25 into the memory 22. The OS program 201 also loads the management program 202 from the storage unit 25 into the memory 22 and executes it.

Figure 3 is an example block diagram showing the configuration of the user device 11. The user device 11 is composed of a processor 31, memory 32, a communication unit 33, an input/output unit 34, a storage unit 35, an internal signal line 36, a monitor 37, a keyboard 38, and a mouse 39.

The storage unit 35 stores programs and data for implementing the virtual desktop arrangement system of this embodiment. The programs stored include an OS program 301 and a virtual desktop connection program 302. The data stored includes terminal user data 303. The OS program 301 on the storage unit 35 is loaded into the memory 32 and executed. The OS program 301 loads the virtual desktop connection program 302 from the storage unit 35 into the memory 32 and executes it.

Figure 4 is an example block diagram showing the configuration of the server device 12. The server device 12 is composed of a processor 41, memory 42, a communication unit 43, a storage unit 45, and an internal signal line 46. The storage unit 45 stores programs and data for realizing the virtual desktop layout system of this embodiment. The programs stored include an OS program 401 and a virtualization program 402.

The data stored is virtual machine image data 403. The OS program 401 on the storage unit 45 is loaded into the memory 42 and executed. The OS program 401 loads the virtualization program 402 from the storage unit 45 into the memory 42 and executes it. The virtualization program 402 creates and executes a virtual machine in the memory 42 based on the contents of the virtual machine image data 403. The virtual machine is a virtual computer that has a virtual processor, virtual memory, virtual storage device, and virtual communication unit.

Figure 5 is a configuration diagram illustrating the relationship between a server device 12, a virtual machine group, and virtual desktops in this embodiment. One or more virtual machines 501 run on one server device 12. In this embodiment, one or more virtual desktops 502 run on each virtual machine 501. One or more virtual machines 501 are grouped together to form a virtual machine group 503. As shown in Figure 5, the virtual machine group 503 may include virtual machines from multiple server devices 12.

Figure 6 is a diagram illustrating an example of user group list data 203. User group list data 203 is composed of fields for user group ID 601 and expected end time 602. User group ID 601 is a field that records a unique identifier for a user group. Expected end time 602 is a field that records the expected end time at which users of the user group corresponding to user group ID 601 will finish their daily work and exit their virtual desktops.

In many companies, each department has roughly set working hours, and user groups can be organized by department. For example, customer service staff use virtual desktops for work from 9:00 to 18:00, while the development department operates in three shifts and includes tasks such as testing systems under development, so virtual desktops are used all day.

The administrator 14 operates the management device 10 before the virtual desktop arrangement system starts operation and registers the contents of the user group list data 203. Furthermore, if a user group is added, deleted, or changed after the virtual desktop arrangement system starts operation, or if the expected end time is changed, the administrator 14 can operate the management device 10 and change the contents of the user group list data 203.

Figure 7 is an example of user list data 204. User list data 204 is composed of the following fields: user ID 701, assigned user group ID 702, average finish time 703, and assigned virtual machine ID 704. User ID 701 is a field that records a unique identifier for the user, such as an employee number. Assigned user group ID 702 is a field that records the user group ID of the user group assigned to user ID 701.

Average end time 703 is a field that records the average end time of the user corresponding to user ID 701, calculated from the user's past virtual desktop usage history. The average end time is recorded as a time of day, but by entering a time period such as 18:00, 19:00, or 20:00, the privacy of users who use the desktop infrequently can be respected.

The assigned virtual machine ID 704 is a field for entering the virtual machine ID of the virtual machine on which the virtual desktop assigned to the user corresponding to the user ID 701 runs. Before the virtual desktop arrangement system starts operation, the administrator 14 operates the management device 10 to register a list of users in the user list data 204. The administrator 14 also notifies each virtual desktop user 15 of their user ID. The contents of the user list data 204 are updated by the management program 202.

Figure 8 is an example of virtual machine group list data 205. The virtual machine group list data 205 is composed of fields for a virtual machine group ID 801 and an assigned user group ID 802. The virtual machine group ID 801 is a field that describes a unique identifier for a virtual machine group. The assigned user group ID 802 is a field that describes the user group ID of the user group to which the virtual machine group is assigned in correspondence with the virtual machine group ID 801.

The administrator 14 operates the management device 10 before the virtual desktop arrangement system starts operation and registers the contents of the virtual machine group list data 205. Furthermore, if the virtual machine group list is added, deleted, or changed after the virtual desktop arrangement system starts operation, the administrator 14 operates the management device 10 and changes the contents of the virtual machine group list data 205.

Updates to the virtual machine group list data 205 are not applied to the virtual machines used by users in real time when updated by the administrator. By applying the updates when the server device 12 is restarted or at midnight, or when there are few users using the virtual desktop, the impact on user work can be reduced.

Figure 9 is an example of virtual machine list data 206. The virtual machine list data 206 is composed of the following fields: virtual machine ID 901, connection information 902, maximum number of virtual desktops 903, allocated virtual machine group ID 904, operating status 905, and number of allocated virtual desktops 906.

Virtual machine ID 901 is a field that describes a unique identifier for a virtual machine. Connection information 902 is a field that describes information for connecting to the virtual machine corresponding to virtual machine ID 901. Maximum number of virtual desktops 903 is a field that describes the maximum number of virtual desktops that can run on the virtual machine corresponding to virtual machine ID 901. Allocated virtual machine group ID 904 is a field that describes the virtual machine group ID of the virtual machine group to which the virtual machine corresponding to virtual machine ID 901 belongs.

Operating status 905 is a field that records the operating status (ON = running, OFF = not running) of the virtual machine corresponding to virtual machine ID 901. Number of allocated virtual desktops 906 is a field that records the number of virtual desktops that have been allocated to the user on the virtual machine corresponding to virtual machine ID 901. Before the virtual desktop arrangement system starts operating, the administrator 14 operates the management device 10 and registers a list of virtual machines in the virtual machine list data 206.

Furthermore, if a user device is added, removed, or changed after the virtual desktop arrangement system has started operating, the administrator 14 operates the management device 10 to change the contents of the virtual machine list data 206. The contents of the virtual machine list data 206 are updated by the management program 202.

Figure 10 is an example of usage history data 207. The usage history data 207 consists of the fields of date and time 1001, user ID 1002, and action 1003.

Date and time 1001 is a field that records the date and time when the action occurred. User ID 1002 is a field that records the user ID of the user who performed the action. Action 1003 is a field that records the content of the action. After the virtual desktop arrangement system starts operating, the content of the usage history data 207 is updated by the management program 202.

Figure 11 is an example of terminal user data 303. Terminal user data 303 consists of the fields terminal user ID 1101 and terminal user average end time 1102.

Terminal user ID 1101 is a field that records a unique identifier for a user who uses a virtual desktop using a user device. Terminal user average end time 1102 is a field that records the average end time of the user with terminal user ID 1101. After the virtual desktop arrangement system starts operation, the contents of terminal user data 303 are updated by the virtual desktop connection program 302.

By storing terminal user data in association with the terminal user ID, it is possible to allocate a virtual machine corresponding to the user's virtual desktop usage time even when multiple users share the user device 11.

Next, the operation of the virtual desktop arrangement system according to an embodiment of the present invention will be described using Figures 12 to 15.

Figure 12 is an example of a flowchart that explains the operations that a user 15 performs using a user device 11 until they start using a virtual desktop.

First, the user 15 starts the virtual desktop connection program 302 on the user device 11 (S1201). The virtual desktop connection program 302 checks whether the terminal user ID is saved in the terminal user data 303 (S1202), and if not saved, performs processing to register the user ID (S1203 to S1205). The virtual desktop connection program 302 presents the user ID input screen to the user (S1203).

Figure 13 shows an example of a user ID input screen that prompts the user to enter a user ID. The user ID input screen consists of a title display area 1301 and an operation content display area 1302. The operation content display area 1302 displays a user ID input area 1303 for entering a user ID, and a registration button 1304 for executing registration.

The user 15 responds by entering the user ID previously provided by the administrator 14 and pressing the registration button 1304 (S1204). The virtual desktop connection program 302 saves the entered user ID in the terminal user data 303 (S1205).

Next, the virtual desktop connection program 302 presents the user with a screen for entering the planned usage time (S1206).

Figure 14 shows an example of a planned usage time input screen that prompts the user to input the planned usage time. The planned usage time input screen interface consists of a title display area 1401 and an operation content display area 1402. The operation content display area 1402 displays a planned usage time selection area 1403 for selecting the planned usage time, a time input area 1404 for inputting the time, and a connect button 1405 for executing the connection.

In the area where you select the planned usage time, a selection input will be displayed so that you can choose between the usual end time (which is the standard end time registered in advance), a longer usage time than usual, a shorter usage time than usual, or all-night usage.

The "As usual" column displays the terminal user's average end time stored in the terminal user data 303. Note that if the user has never connected to a virtual desktop, the terminal user's average end time is not stored, so instead of displaying the terminal user's average end time, an interface may be displayed that allows the user to input the planned end time.

The user 15 selects and enters the planned usage time from the virtual desktop usage schedule for that day, and responds by pressing the connect button 1405 (S1207). The virtual desktop connection program 302 calculates the planned end time based on the entered information, and sends the user ID and planned end time to the management program 202 (S1208).

The management program 202 assigns a user group to the user ID based on the received user ID and scheduled end time (S1209). Specifically, it determines a user group in the user group list data 203 that has an expected end time set close to the scheduled end time, and assigns the user to that user group. Next, it assigns a virtual machine to the user ID (S1210). Specifically, it determines a virtual machine group ID corresponding to the assigned user group based on the contents of the virtual machine group list data 205, checks the list of virtual machines included in the virtual machine group ID using the virtual machine list data 206, and determines a list of candidate virtual machines.

If there is a virtual machine from the list of candidate virtual machines that is in operation ON and has a number of allocated virtual desktops that is less than the maximum number of virtual desktops, a virtual machine with a larger number of allocated virtual desktops is assigned to the user (S1211). If there is no virtual machine that is in operation ON and has a number of allocated virtual desktops that is less than the maximum number of virtual desktops (if all virtual desktops of virtual machines that are in operation ON have already been assigned), a virtual machine that is in operation OFF is selected from the list of candidate virtual machines and started (S1212). Once the virtual machine has started and a notification that it is ready is received (S1213), the virtual machine is assigned to a virtual desktop on the user device.

Then, the management program 202 updates the data (S1214). Specifically, it updates the assigned virtual machine ID 704 for the user in the user list data 204 to the ID of the assigned virtual machine, and updates the operating status 905 corresponding to the assigned virtual machine in the virtual machine list data 206 to ON. It also increments and updates the assigned virtual desktop count 906 corresponding to the assigned virtual machine in the virtual machine list data 206. It adds the action started by the user ID to the usage history data 207, along with the current date and time. The management program 202 then returns connection destination information for the assigned virtual machine to the virtual desktop connection program 302 (S1215).

The virtual desktop connection program 302 establishes a virtual desktop connection to the virtual machine based on the received virtual machine connection destination information (S1216). After the connection is established, the virtual machine sends a virtual desktop screen (S1217), and the user 15 can use the virtual desktop screen to perform their work (S1218).

Figure 15 is an example of a flowchart illustrating the operations performed when a user 15 uses the user device 11 to terminate use of a virtual desktop. First, the user 15 instructs the virtual desktop connection program 302 of the user device 11 to terminate the virtual desktop (S1501). The virtual desktop connection program 302 then disconnects the virtual desktop connection with the connected virtual machine (S1502) and sends the user ID to the management program (S1504).

Based on the received user ID, the management program 202 adds the completed action for that user ID to the usage history data 207 along with the current date and time. The management program 202 also updates the average completion time 703 for that user (S1505).

Specifically, the usage history data 207 is checked, the date and time of the most recent specified number of end actions (e.g., 10 actions) for the user ID are extracted, the average end time is calculated, and the average end time 703 is updated. Next, the management program 202 references the allocated virtual machine for the user ID from the allocated virtual machine ID 704 in the user list data 204, and updates the allocated virtual desktop count 906 for that virtual machine by decrementing it by one (S1507).

As a result, it is determined whether the number of allocated virtual desktops for the virtual machine has reached 0 (S1507). If so, the management program 202 issues a command to the server device 12 to stop the virtual machine (S1508), and upon receiving a response from the server device 12 indicating that the virtual machine has been stopped (S1509), the management program 202 updates the operating status of the virtual machine in the virtual machine list data 206 to OFF (S1510). The management program 202 then returns the new average end time calculated in S1505 to the virtual desktop connection program 302 (S1511).

The virtual desktop connection program 302 saves the received new average end time in the terminal user average end time 1102 of the terminal user data 303 (S1512) and notifies the user 15 of the end of the virtual desktop on the end notification screen (S1513). Then, the virtual desktop connection program 302 receives a confirmation response from the user 15 on the end notification screen (S1514) and terminates the virtual desktop connection program 302 (S1515).

As described above, according to an embodiment of the present invention, the number of virtual machines required for a virtual desktop is operated according to the user's usage start time, and the expected end time is determined based on the average end time calculated from usage history data and the expected end time entered by the user. This determines the virtual machine group for the virtual desktop to be assigned to the user. This allows users with similar expected end times to be assigned to the same virtual machine, thereby minimizing the operating time of virtual machines without affecting user convenience.

The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of its gist. For example, the virtual machines required for a virtual desktop are started when the user inputs the start of use. However, by generating a number of virtual machines capable of servicing virtual desktops for which allocation requests are expected in advance based on the average start time calculated from usage history data, the time until the virtual desktop begins to be provided to the user can be shortened.

In addition, the expected end time is determined from the average end time calculated from the user's usage history data and the expected end time entered by the user, but some of this processing may be omitted and the expected end time may be determined using data from the user's schedule (timetable) or the schedule of the organization to which the user belongs. The expected end time may be determined using information available in the system, such as the average end time and schedule, without requesting the user to input the expected usage time (S1206-S1207).

When estimating end times of use from user usage history data, it is also possible to divide the data into weekdays, holidays, or by day of the week. When estimating end times of use from user usage history data, it is also possible to consider not only the average but also the variance, and assign users with less fluctuation to the same virtual machine. Furthermore, although the number of user groups and virtual machine groups and the number of users within a group are set by the administrator, they may also be set by simulating the usage history data of all users and calculating the optimal value that minimizes the operating time of the entire virtual machine. Furthermore, although virtual desktops are placed on virtual machines, they may also be placed on physical machines.

10... Management device, 11... User device, 12... Server device, 13... Network, 14... Administrator, 15... User, 21... Processor, 22... Memory, 23... Communication unit, 24... Input/output unit, 25... Storage unit, 26... Internal signal line, 27... Monitor, 28... Keyboard, 29... Mouse, 201... OS program, 202... Management program, 203... User group list data, 204... User list data, 205... Virtual machine group list data, 206... Virtual machine list data , 207... usage history data, 31... processor, 32... memory, 33... communication unit, 34... input/output unit, 35... storage unit, 36... internal signal line, 37... monitor, 38... keyboard, 39... mouse, 301... OS program, 302... virtual desktop connection program, 303... terminal user data, 41... processor, 42... memory, 43... communication unit, 45... storage unit, 46... internal signal line, 401... OS program, 402... virtualization program, 403... virtual machine image data data, 501... virtual machine, 502... virtual desktop, 503... virtual machine group, 601... user group ID, 602... expected end time, 701... user ID, 702... assigned user group ID, 703... average end time, 704... assigned virtual machine ID, 801... virtual machine group ID, 802... assigned user group ID, 901... virtual machine ID, 902... connection information, 903... maximum number of virtual desktops, 904... assigned virtual machine group ID, 905... operation Working status, 906...Number of allocated virtual desktops, 1001...Date and time, 1002...User ID, 1003...Action, 1101...Terminal user ID, 1102...Terminal user average end time, 1301...Title display area, 1302...Operation content display area, 1303...User ID input area, 1304...Register button, 1401...Title display area, 1402...Operation content display area, 1403...Scheduled usage time selection area, 1404...Time input area, 1405...Connect button.

Claims (11)

A virtual desktop management system for managing connections to virtual desktops, comprising:
a server device on which a plurality of virtual machines run;
a user device having a virtual desktop connection unit that requests allocation to the virtual desktop;
A virtual desktop management system comprising a management device that receives a request from the virtual desktop connection unit and allocates virtual desktops to virtual machines divided based on the time periods when the virtual desktops are in use. 2. The virtual desktop management system according to claim 1,
The virtual machines are grouped based on the time periods when the virtual desktops are no longer in use;
When making an allocation request, the virtual desktop connection unit attaches usage schedule information regarding a scheduled end time of the virtual desktop usage, and
The management device is a virtual desktop management system that allocates the virtual machines to the virtual machines in the group whose usage will end soon among the grouped virtual machines based on the usage schedule information. 2. The virtual desktop management system according to claim 1,
The virtual machines are grouped based on the time periods when the virtual desktops are no longer in use;
The management device accepts the end time when use of the virtual desktop ends, updates usage history data using the accepted end time, and when a connection request is accepted from the virtual desktop connection unit, selects the virtual machine to be assigned based on the usage history data. 4. The virtual desktop management system according to claim 2,
A virtual desktop management system in which users of the user devices are divided into user groups based on the time they finish using the virtual desktop, and when the virtual desktop connection unit requests allocation to a virtual desktop, the management device assigns the user group to the group of virtual machines corresponding to the user group. 3. The virtual desktop management system according to claim 2,
A virtual desktop management system in which the virtual desktop connection unit accepts input of the scheduled end time of virtual desktop use, stores it in a memory unit as terminal user data, and when sending a virtual desktop allocation request to the management device for the virtual machine, reads the scheduled end time of virtual desktop use from the terminal user data and attaches the scheduled end time of virtual desktop use to the allocation request. 3. The virtual desktop management system according to claim 2,
A virtual desktop management system in which the virtual desktop connection unit refers to the schedule information of the user associated with the user device, determines the scheduled end time of virtual desktop use based on the schedule information, and attaches it to the virtual machine allocation request. 4. The virtual desktop management system according to claim 3,
The management device uses the usage history data to make the number of virtual machines corresponding to the number of connection requests available for allocation to virtual desktops for each group of usage time periods. 3. The virtual desktop management system according to claim 2,
the virtual desktop connection unit stores a predetermined default virtual desktop use end time in a storage unit;
Accept the difference from the end time of the default virtual desktop,
The virtual desktop management system sends to the management device a request for allocation of a virtual desktop for the day the difference was received, together with the time when the use of the default virtual desktop ended and the time when the difference was received. 1. A virtual desktop management method for managing a connection to a virtual desktop, comprising:
Multiple virtual machines are running on the server device,
a virtual desktop connection unit included in the user device sends a request to allocate the virtual desktop;
A virtual desktop management method in which a management device receives an allocation request and allocates virtual desktops to virtual machines divided based on the time periods during which the virtual desktops are used. 10. The virtual desktop management method according to claim 9,
The virtual machines are grouped based on the time periods when the virtual desktops are no longer in use;
When making an allocation request, the virtual desktop connection unit attaches usage schedule information regarding a scheduled end time of the virtual desktop usage, and
The management device allocates the virtual machines to the virtual machines in the group whose usage will end soon among the grouped virtual machines based on the usage schedule information. The virtual desktop management method according to claim 10,
A virtual desktop management method in which users of the user device are divided into user groups based on the time they finish using the virtual desktop, and when the virtual desktop connection unit requests allocation to a virtual desktop, the management device assigns the user group to the group of virtual machines corresponding to the user group.