JP2013210816A - Arrangement method by remote use - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system for solving virtual PC screen transfer delay occurring when a user uses a virtual PC via remote connection from a remote network environment.SOLUTION: To solve the problem, an arrangement system includes: a virtual server, connected to a network, for executing one or plural virtual PCs previously created for use by a user; a terminal having an input/output unit which used by the user for operating the virtual PC via a network; a schedule management part for holding schedule information including time information and place information; and an arrangement control part for generating a virtual PC arrangement pattern for specifying a virtual PC server for which virtual PCs are to be arranged on the basis of the schedule information so as to arrange virtual PCs in reference to the virtual PC arrangement pattern.

Description

  The present invention relates to a system, a method, and a program for minimizing a screen transfer delay of a thin client.

  The thin client system is a system realized by combining a server having a processing function and a client terminal (also referred to as a terminal) having limited functions such as screen display and input operation. In general, since data is not stored in the terminal but is stored on the server side, it has been actively used in recent years for solving various problems such as security improvement, total cost reduction, and realization of mobility.

  Various implementations have been proposed for the thin client system. The virtual PC (Personal Computer) type virtualizes a conventional PC environment as a virtual PC that is a virtual terminal, and stores it in a virtual PC server that is a virtual terminal server. The terminal communicates with the virtual PC to receive and display screen information, and transmits input to the mouse and keyboard provided in the terminal to the virtual PC, and the user uses the virtual PC through the terminal. In the server-based type, a plurality of users log in to one server, and the terminal displays a screen image sent from the server and performs business. In the net boot type, a boot image is first downloaded to a terminal, and the terminal starts an OS (Operating System) using the boot image to perform a job. The present invention is premised on a virtual PC type thin client system.

  Each virtual PC server has software called a hypervisor for executing a virtual PC, which will be described later, and is a server having a feature capable of executing a virtual PC. Typical examples of the hypervisor are a VMware (registered trademark) ESX server, a XenServer (registered trademark), Microsoft (registered trademark) Hyper-V, and the like.

  A virtual PC is a virtual machine executed by a hypervisor installed on a virtual PC server. An OS and applications can be installed on the virtual disk of the virtual PC. The user can perform business using them.

  The virtual PC has an independent IP address and can be accessed from the terminal via the network interface of the virtual PC server. A virtual PC may be saved as an image file as a file on a virtual PC server disk or a common storage mounted from a plurality of virtual PC servers, and the file may be copied and executed on a different virtual PC server. It has a feature that is not possible with normal physical servers. In the present invention, it is also referred to as virtual PC movement.

  The terminal is connected to a network, has a limited function for connecting to a virtual PC, providing a screen of the virtual PC to the user through the screen, and allowing the user to input a mouse, a keyboard, and the like. In the present embodiment, the terminal also moves according to the user's behavior schedule and behavior pattern. The terminal is characterized in that it can be carried by a user and can be connected to a virtual PC via a network provided at the destination. With regard to this feature, when connecting to the virtual PC, the terminal may be understood to use a technology such as VPN, or may be understood to be connected to the same network at the destination.

  A user accesses a virtual PC using a client terminal (hereinafter simply referred to as a terminal). One or more virtual PCs are assigned to each user. The user connects the terminal to the virtual PC, displays the virtual PC screen on the terminal, and performs a task. Files owned by each user and virtual PC setting information (so-called user profile) are individually stored in the virtual disk of the virtual PC used by the user, or concentratedly stored in a directory service or the like. . The user can carry the terminal when moving, or access the virtual PC using the terminal arranged at the moving destination.

Japanese Patent Laid-Open No. 2010-109955 provides ICA (Independent Computation Architecture), RDP (Remote Desktop Protocol), and the like as techniques for displaying a screen by connecting a terminal to a virtual PC via a network. .

  In these conventional technologies, the screen transfer data is compressed and transmitted to reduce the bandwidth required for the communication, screen transfer is updated only at the point where the screen operation has changed, the screen transfer protocol performance is improved, The screen update delay is reduced by improving the screen transfer source application.

  When the user moves to a remote place, the network path between the virtual PC server that executes the virtual PC and the terminal becomes long, causing a network delay. As a result, there is a delay in updating the terminal screen. However, even if the prior art is applied, the range of improvement in the delay of the screen update is limited. In particular, in an environment where a user can move and access from different locations such as a thin client system using a virtual PC, an end-to-end network between the network connected at the destination and the virtual PC However, the problem that the sufficient throughput cannot be obtained and the problem that the response delay becomes long cannot be avoided, and the convenience for the user is remarkably lowered.

  On the other hand, it is becoming common for virtual PC servers to be distributed and managed in different regions due to disaster countermeasures and cloud services, and it is not uncommon today that there are multiple virtual PC servers across regions. Absent. Therefore, in order to solve the problem of the delay of the virtual PC screen, it is considered that these virtual PC servers can be used effectively.

  An object of the present invention is to provide a system for solving a virtual PC screen transfer delay that occurs when a user uses a virtual PC by remote connection from a remote network environment.

  In order to solve the above-described problem, an arrangement system includes a plurality of virtual terminal servers that are connected to a network and execute one or more virtual terminals created in advance for use by a user, and the virtual terminal server A configuration management unit for managing the configuration information, a terminal including an input / output device that allows the user to operate the virtual terminal via the network, and schedule information including time information and location information of the user Generating a layout pattern for specifying the virtual terminal server on which the virtual terminal is to be placed based on the schedule information and the configuration information, and placing the virtual terminal on the virtual terminal server according to the placement pattern An arrangement control unit.

  The virtual PC screen transfer delay caused by the network delay when the user uses the virtual PC by remote connection from a remote network environment is eliminated.

(First embodiment)
The configuration of the first embodiment of the present invention will be described with reference to FIG.

  The arrangement system in the present embodiment includes virtual PC servers 501 and 511 that execute virtual PCs, a virtual PC 201 that is executed on the virtual PC server, an arrangement apparatus 600, and a terminal 111. Although the present embodiment includes two virtual PC servers 501 and 511, in the present invention, it is sufficient if there are two or more virtual PC servers. A user 101 (not shown) is a person who uses the virtual PC 201.

  The placement device 600 will be described. The arrangement apparatus 600 includes an arrangement control unit 601, a configuration management unit 602, and a schedule management unit 603.

  The arrangement control unit 601 acquires schedule information managed by the schedule management unit 603 and derives it as a virtual PC arrangement pattern based on the schedule information. The virtual PC arrangement pattern is information for specifying a virtual PC server on which each virtual PC is to be arranged. Further, the placement control unit 601 actually instructs the virtual PC server according to the virtual PC placement pattern described above, and moves the virtual PC.

  The configuration management unit 602 manages configuration information of the virtual PC server. The configuration information includes the geographical location of the virtual PC server, the data center to which the virtual PC server belongs, the number of virtual PCs executed by the virtual PC server, the upper limit of the number of executable virtual PCs, the upper limit of the calculation resources of the virtual PC server, and It indicates the usage rate. The configuration management unit 602 collects, manages, and provides these pieces of information related to the virtual PC server. In the present embodiment, at least information sufficient to specify which virtual PC server belongs to the area from the name of the area described in the location information is held.

  The schedule management unit 603 can manage and provide schedule information registered by the user. For example, schedule functions included in groupware such as Microsoft (registered trademark) Exchange Server, NEC (registered trademark) StarOffice (registered trademark), and Cybozu (registered trademark) Office. These can take out an individual's schedule using API. Assume that the user registers time information and location information such as schedule information 700 in advance as shown in FIG. As the time information, date, hour and minute can be registered, and special attributes such as repeating the same time according to a rule such as weekly or monthly may be registered. In the present embodiment, the location information is information for accessing a specified virtual PC server such as a host name or information that can uniquely identify a virtual PC server.

  An area is an area where a virtual PC server belonging to the area can be accessed at a relatively high speed. In the area 301, the terminal can access the virtual PC server 501 at a higher speed than the virtual PC 511, that is, with less delay.

  The operation of placement apparatus 600 will be described using flowchart S100 in FIG.

  The placement device 600 is activated at a predetermined time.

  The arrangement control unit 601 takes in the schedule information of the user stored in the schedule management unit 603 (S101). It is assumed that the virtual PC server 502 is used on January 18, 2012.

  The arrangement control unit 601 specifies that the virtual PC server 511 belongs to the area 302 specified as the place in the schedule information by using the information of the configuration management unit 602, and the virtual PC 201 of the user 101 is virtualized. A virtual PC arrangement pattern is generated so as to arrange the PC server 511 (S102). A pattern is generated so that the virtual PC 201 moves to the virtual PC server 511.

  The arrangement control unit 601 moves and arranges the virtual PC to the designated virtual PC server based on the virtual PC arrangement pattern. The virtual PC image file is moved from the storage location of the original virtual PC server to the storage location of the virtual PC image of the new virtual PC server. After the file is moved, the virtual PC server is instructed to start the virtual PC. As described above, the terminal can access the virtual PC executed by the destination virtual PC server.

(Effects of the first embodiment)
According to the schedule registered by the user, the network delay that occurs when the virtual PC moves and the terminal accesses the virtual PC can be reduced.

(Second Embodiment)
The configuration of the second embodiment of the present invention will be described with reference to FIG.

  Each of the data centers 401 to 403 manages one or more virtual PC servers. The data center here may be in the form of providing server hosting, in the form of IaaS, or in the form of a platform for providing cloud computing. In the present invention, it is sufficient if there are two or more data centers. A data center always belongs to one of the areas.

  The arrangement device 600 includes a configuration management unit 602 and a map search unit 604 in addition to the configuration of the first embodiment.

  In the present embodiment, the configuration management unit 602 holds at least information sufficient to specify which virtual PC server is close to the location from the information on the geographical location. The geographical position may be information sufficient to measure the distance between a plurality of points, for example, in the form of (latitude, longitude).

  The schedule management unit 603 is similar to the first embodiment described above in that the schedule information registered by the user can be managed and provided. However, the description of the place may be different for each user. That is, information that is not information that can uniquely identify a virtual PC server, such as a building name or an area name, may be input.

  The map search unit 604 identifies the actual geographical position from the location information of the schedule registered in the schedule management unit 603 described above. For example, the map search unit 604 can include a Google (registered trademark) map. By using the API (Application Programming Interface), any means can specify the geographical position.

  The arrangement control unit 601 extracts location information from the schedule information managed by the schedule management unit 603 and gives it to the map search unit 604 to identify the geographical position. Further, based on the specified geographical information, a virtual PC server having a distance close to the geographical position specified from the location information in the schedule information is specified. Further, based on this, a virtual PC arrangement pattern is generated, and the virtual PC is arranged according to the generated virtual PC arrangement pattern.

  The operation of the placement apparatus 600 will be described using the flowchart S200 of FIG.

  According to FIG. 4, in the second embodiment, the virtual PC 201 is arranged in the virtual PC server 501 in the initial state. According to the schedule information 701 in FIG. 5, the user 101 registers schedule information for moving from Tokyo to Nagoya on the schedule management unit 603 on January 18, 2012. Each building name is registered. It is the same as in the first embodiment that the placement device 600 is activated at a designated time.

  In the present embodiment, the arrangement control unit 601 takes in the schedule information at a predetermined time (S201).

  Next, the arrangement control unit 601 extracts location information from the schedule information. The map search unit 604 specifies the geographical positions of the building names “XX head office building” and “XX central center” registered as the location information, and returns the result to the arrangement control unit 601 (S202). For example, information such as (35.649396980365499, 139.74741919049008) is returned to “XX head office building”.

  Next, the arrangement control unit 601 identifies a virtual PC server that is close to the terminal based on the geographical position. As a result, it is determined that the virtual PC server 511 is close to “XX Chubu Center”, which is the destination location of the user 101. Based on this result, it is determined that it is appropriate to move the virtual PC 201 of the user 101 to the virtual PC server 511 of the data center 402, and a virtual PC arrangement pattern is generated to that effect (S203).

  Finally, the placement control unit 601 actually moves the virtual PC image file, and causes the virtual PC 201 to be executed by the virtual PC server 511 of the data center 402 (S204).

(Effects of the second embodiment)
In addition to the effect of reducing network delay when a terminal accesses a virtual PC, the location information registered in the schedule information can be registered with the building name, etc., so that the user can be aware of the location of the data center. The effect of reducing the burden on the user can be obtained.

(Third embodiment)
The configuration of the third embodiment of the present invention will be described with reference to FIG.

  In addition to the configuration of the first embodiment, the arrangement device 600 has an access log management unit 605 as a basic configuration. The placement apparatus 600 does not have the schedule management unit 603.

  The measuring unit 121 included in the terminal 111 has an ICMP transmission / reception function represented by a ping command, and measures the network response delay of the virtual PC server. Specifically, the network delay is measured by pinging the virtual PC server from its own terminal and measuring the time required from the transmission of the ICMP ECHO packet to the reception of the REPLY packet returned as a response. To measure network delay.

  The access log management unit 605 manages the measurement result of the network response delay.

  The placement control unit 601 automatically specifies a virtual PC server having a small network response delay based on information managed by the access log management unit 605. Based on the periodicity of the identified virtual PC server, a virtual PC server that is likely to be nearby is determined for each day of the week. The result is illustrated in the access log processing result 703 of FIG. Based on this, schedule information is generated to generate a virtual PC arrangement pattern.

  The operation of the placement apparatus 600 will be described using the flowchart S300 of FIG.

  The measurement unit 121 measures the network response delay of the available virtual PC servers 501 to 511 at regular time intervals. The terminal transmits time information as the obtained measurement result to the arrangement control unit 601. The arrangement control unit 601 records the above measurement result in the access log management unit 605 (S301). If the ICMP packet is filtered on the route or the device does not respond to ECHO, the method described in this embodiment cannot be used. In that case, the fourth embodiment described later is used. May be. The recorded result is the access log 702 shown in FIG. The measured date and time, the delay of the virtual PC server [milliseconds], and the day of the week flag of the measured date and time are stored. In the access log 702, the measurement result for January 2012 is stored.

  Next, the arrangement control unit 601 reads the access log 702 and totals the number of measurements for each day of the week. This is as described in the total number of times (times) of the access log processing result 703 (S202).

  Next, the placement control unit 601 counts the number of times that the network response delay is determined to be relatively good for each virtual PC server. In general, a smaller numerical value is better. Also in this embodiment, a smaller numerical value is determined to be better. The total result is displayed in the good judgment (times) of the access log processing result 703 (S203).

  Next, the arrangement control unit 601 calculates the ratio of good determination (times) to the total number of measurements (times) for each virtual PC server. This is as described in the good ratio (%) of the access log processing result 703.

  The placement control unit 601 generates a virtual PC placement pattern for each day of the week in advance by generating schedule information on the assumption that the virtual PC server having the highest good ratio (%) is a data center that is close to the terminal. A virtual PC can be arranged for each day of the week.

(Effects of the third embodiment)
In addition to the effect of reducing the network delay when the terminal accesses the virtual PC, in this embodiment, the terminal itself measures the response delay of the virtual PC server. It is possible to reduce the burden on the user without registering the schedule.

(Fourth embodiment)
The configuration of the fourth embodiment of the present invention will be described with reference to FIG.

  As for the basic configuration, in addition to the configuration of the first embodiment, the terminal 111 further includes a geographical location specifying unit 131, and the placement device 600 further includes a location log management unit 606.

  The geographic location specifying unit 131 measures the geographic location where the terminal 111 is located. Specifically, a GPS receiver or the like can be used as the geographical location specifying unit 131, but the device and method thereof are not claimed as the right of the present application. The measured geographical position is notified to the terminal 111.

  The location log management unit 606 manages the measurement result of the geographical location.

  The placement control unit 601 automatically specifies a virtual PC server that is close to the terminal based on information managed by the access log management unit 605. Based on the periodicity of the identified virtual PC server, a virtual PC server that is likely to be nearby is determined for each day of the week. In this embodiment, the access log processing result 703 in FIG. 10 is used as it is, and the result is illustrated. Based on this, schedule information is generated to generate a virtual PC arrangement pattern.

  In the present embodiment, the configuration management unit 602 holds at least information sufficient to specify which virtual PC server is close to the location from the information on the geographical location.

  The operation of the placement apparatus 600 will be described using the flowchart S300 of FIG.

  The terminal 111 acquires a geographical position from the geographical position specifying unit 131 at regular time intervals. The terminal transmits time information as the obtained measurement result to the arrangement control unit 601. The arrangement control unit 601 records the above measurement result in the position log management unit 606 (S301). The recorded result is a movement log 704 shown in FIG. The measured date and time, the distance [km] from the virtual PC server, and the day of the week flag of the measured date and time are stored. In the movement log 704, the measurement result for January 2012 is stored.

  Next, the arrangement control unit 601 reads the movement log 704 and totals the number of measurements for each day of the week. This is as described in the total number of times (times) of the access log processing result 703 (S202).

  Next, the arrangement control unit 601 counts the number of times determined to be close to the measured geographical position for each virtual PC server. In general, a smaller numerical value is better. Also in this embodiment, a smaller numerical value is determined to be better. The total result is displayed in the good judgment (times) of the access log processing result 703 (S203).

  Next, the arrangement control unit 601 calculates the ratio of good determination (times) to the total number of measurements (times) for each virtual PC server. This is as described in the good ratio (%) of the access log processing result 703.

  The placement control unit 601 generates a virtual PC placement pattern for each day of the week in advance by generating schedule information on the assumption that the virtual PC server having the highest good ratio (%) is a data center that is close to the terminal. A virtual PC can be arranged for each day of the week.

(Effects of the fourth embodiment)
In addition to the effects obtained in the third embodiment, there is a merit that it can be used even in an environment where a server or a network filters ICMP packets.

(Fifth embodiment)
The configuration of the fifth embodiment of the present invention will be described with reference to FIG.

  The arrangement system in this embodiment includes terminals 111 to 113, virtual PC servers 501 to 522 that execute virtual PCs 201 to 211, data centers 401 to 403, and an arrangement device 600.

  Each of the virtual PC servers 501 to 522 executes a virtual PC as illustrated.

  The data centers 401 to 403 have virtual PC servers as shown.

  The data centers 401 to 403 belong to different areas 301 to 303, respectively.

  Users 101 to 103 (not shown) use terminals 111 to 113, respectively.

  Users 101 to 103 and A to H (not shown) use virtual PCs 201 to 211, respectively.

  The arrangement apparatus 600 includes an arrangement control unit 601, a configuration management unit 602, a schedule management unit 603, and a map search unit 604.

  In the present embodiment, the configuration management unit 602 holds at least information sufficient to specify which virtual PC server is close to the location from the information on the geographical location.

  In general, the number of virtual PCs that can be executed by a virtual PC server is limited. In the thin client system, the CPU, memory, disk, and network bandwidth used by the virtual PC are generally uniform. Therefore, in this embodiment, it is assumed that the same number of virtual PCs can be executed on the assumption that the virtual PC server is composed of hardware having the same capability. In this embodiment, it is assumed that each of the virtual PC servers 501 to 522 has a capability of hosting up to two virtual PCs. Of course, there is no influence on the essence of the present invention even if the number of virtual PCs that can be executed for each virtual PC server is not the same.

  Here, the running virtual PC information 708A shown in FIG. 15 is a part of information held by the configuration management unit 602. However, in the virtual PC capacity that is the ability to execute each virtual PC in the data center, the user 101 Further, a total of three virtual PCs used by 103 cannot be further executed. This is because there are only two free spaces 299 in the virtual PC servers 511 to 512 in the data center 402 even after the virtual PC of the user D is shut down as described later. Therefore, arrangement adjustment is performed by statistical processing described later.

  The operation of the placement apparatus 600 will be described using a flowchart S500 of FIG.

  The point that the placement device 600 starts executing at a predesignated time is the same as in the first embodiment. The designated time is preferably a time at which it is considered that many users' work is temporarily interrupted, such as 3 am. Here, when the operations of the users 101 to 103 and A to H are not scheduled at 3 am, the arrangement control unit 601 determines that each virtual PC can be moved. In principle, a user's virtual PC whose business is not interrupted does not move. In the example of the present embodiment, it is assumed that the current time is 3:00 am on January 18, 2012.

  The arrangement control unit 601 acquires time information and place information, which are schedule information of the users 101 to 103 and A to H, from the schedule management unit 603 (S501). The schedule information is exemplified in the schedule information 705 illustrated in FIG. Further, only schedule information for the next morning is extracted, and the schedule information 705 is aggregated into information on the location, use start time, and use time for each user as illustrated in the schedule information processing result 706 illustrated in FIG.

  The arrangement control unit 601 causes the map search unit 604 to specify the geographical position from the location information (S502). It is assumed that Tokyo belongs to area 301 and Nagoya belongs to area 302. Furthermore, Shizuoka, which is closer to Nagoya than Tokyo, belongs to area 303. The XX head office building belongs to area 301, the XX Chubu Center belongs to area 302, and the Shizuoka XX building belongs to area 303. That is, since the users 101 to 103 and their terminals 111 to 103 are close to the virtual PC server of the data center 402, the network delay can be reduced if each virtual PC can be moved here.

  The placement control unit 601 shuts down a user's virtual PC for which schedule information is not set the next morning (S503). User D has no schedule set on January 18, 2012. In this embodiment, the absence of a schedule is the same as not using a thin client, and the virtual PC is not used and may be shut down. This is to free up the capacity of the virtual PC server. The virtual PC of user D is shut down, and as a result, one additional free space 299 is generated in the virtual PC server 512. The number of virtual PCs being executed by the virtual PC server is as exemplified in the virtual PC information 708B being executed shown in FIG.

  The arrangement control unit 601 lists the movement distance for each terminal (S504). In the illustration of this embodiment, the moving distance of the users 101 to 103 is 395.9 km, and the others are zero. This is because only these users have a schedule to move, and the above distance is the distance between places before and after the movement.

  The arrangement control unit 601 searches for an arrangement suitable for statistical processing of the movement distance for each terminal (S505). The specific method will be described later. Thereby, the virtual PCs of all the users are adjusted so as to be more appropriately arranged.

  The placement control unit 601 generates a virtual PC placement pattern based on the placement searched by the statistical processing. Further, the virtual PC is moved according to the generated virtual PC arrangement pattern.

As described above, the arrangement control unit 601 can move the virtual PC, and the flow 500 ends. Next, the statistical processing in S505 described above will be described with reference to the flowchart S600 illustrated in FIG.

  First, the arrangement control unit 601 highly evaluates the priorities of the users 101 to 103 in the order of use from the earliest time, and then highly evaluates the users who use the same time in the order of long time use (S601). An example is shown in the priority of the virtual PC arrangement information 707 in FIG. As a result, the user 101 has the highest priority (priority 1), and then the user 102 has the highest priority (priority 2). The user 103 and the users A to C and F to H have the next highest priority (priority 3). User E has the lowest priority (priority 4). User D has no priority. In the virtual PC arrangement information 707 in FIG. 21, ranks 1 to 4 are assigned according to each user.

  Second, the arrangement control unit 601 searches for an arrangement such that the variance × average of the moving distances of the users 101 to 103 and A to H is as small as possible (S602). Here, the moving distance of each user is 395.9 kilometers for the users 101 to 103, and the others are zero. Even if only the users 101 to 102 are moved to the virtual PC server 512, the distance between the user 103 and the virtual PC is 395.9 km, and only the user 103 is allowed to use a virtual PC that is unfairly far away. I must. In this regard, consideration is given to the generation of the virtual PC arrangement pattern so as to minimize the variance of the movement distance of the user, and the unfairness of the user 103 is eliminated. This is because the closer the variance is to zero, the closer the virtual PC distances of all users are to the same, resulting in less unfairness. However, even if the variance is reduced and the unfairness among users is reduced, as a result, the virtual PCs of all users are equally located at remote locations, which does not solve the problem of the present invention. . Accordingly, the problem is solved by searching for a virtual PC arrangement pattern that makes the following evaluation formula (1) as small as possible.

var (D) × avg (D) (1)
In equation (1), var () represents the variance, avg () represents the average, and D represents a list of distances between the terminal and the virtual PC.

  The definitions of variance and mean are based on general statistical definitions. A virtual PC of a user who satisfies this requirement and has a high rank is preferentially placed in a data center close to the terminal. In the search for a virtual PC arrangement pattern that satisfies the evaluation formula, the location and number of virtual PCs are limited in the present invention. Algorithms that search for combinations that reduce the variance while satisfying such constraints have been studied in fields different from the present invention. For small-scale ones, an algorithm that provides a sufficiently accurate result within a realistic time is provided, but for very large-scale ones, a correct result is not always obtained. In accordance with the operation mode of the system of the present invention, an algorithm for deriving a compromise solution within a finite time by a heuristic method may be adopted.

  As a result, the users 101 and 102 are placed on the virtual PC server 512, the virtual PCs of the users E and 103 are replaced with the virtual PC servers that execute them, and the other virtual PCs are maintained without changing the placement. Thus, the dispersion becomes smaller. 3 shows an example of a virtual PC arrangement pattern generated by 103.

  FIG. 22 illustrates the arrangement derived in S505. The virtual PCs 201 and 202 of the users 101 and 102 move to the virtual PC server 512 of the data center 402. The virtual PC 207 of the user D is not executed by any virtual PC server. The virtual PC 203 of the user 103 remains executed on the virtual PC server 502 of the data center 401 and does not move.

  In the arrangement, a plurality of methods can be taken. Basically, a virtual PC image file managed by the virtual PC server is copied. However, since the load on the disk and network is large, it is possible to manage the disk image of the virtual PC separately for the master virtual PC arranged for each area and the difference disks for the number of users, and copy only the difference disk. is there. This difference management technique can be dealt with by using an existing duplication technique (such as VMWare linked clone), and therefore will not be described.

  Since not all virtual PCs can always be executed by the nearest virtual PC server, the delays are made as small as possible in consideration of the usage time between users in this way.

(Effects of the fifth embodiment)
In this embodiment, when a user moves and accesses from a different remote location, considering the priority among the users, an arrangement that can obtain a suitable network environment according to the situation is performed, and the network delay is reduced as a whole. The result is minimization.

It is the schematic of the structure in 1st Embodiment. It is a flowchart explaining operation | movement of the arrangement | positioning control part in 1st Embodiment. It is a user's schedule information in 1st Embodiment. It is the schematic of the structure in 2nd Embodiment. It is a user's schedule information in 2nd Embodiment. It is a flowchart explaining operation | movement of the arrangement | positioning control part in 2nd Embodiment. It is the schematic of the structure in 3rd Embodiment. It is a flowchart explaining operation | movement of the arrangement | positioning control part in 3rd Embodiment. It is an example of the access log information in 3rd Embodiment. It is the result of processing the access log information in the third embodiment. It is the schematic of the structure in 4th Embodiment. It is a flowchart explaining operation | movement of the arrangement | positioning control part in 4th Embodiment. It is an example of the movement log information in 4th Embodiment. It is the schematic of the structure in 5th Embodiment. It is virtual PC information in execution in 5th Embodiment. It is a flowchart explaining operation | movement of the arrangement | positioning control part in 5th Embodiment. It is a user's schedule information in 5th Embodiment. It is a processing result of a user's schedule information in a 5th embodiment. It is virtual PC information in execution in 5th Embodiment. It is a flowchart explaining the operation | movement of the statistical process in 5th Embodiment. It is virtual PC arrangement | positioning information in 5th Embodiment. It is the schematic of the structure after the operation | movement in 5th Embodiment.

101 User 102 User 103 User 111 Terminal 112 Terminal 113 Terminal 121 Measuring Unit 131 Geographical Location Specifying Unit 201 Virtual PC for User 101
202 Virtual PC for user 102
203 Virtual PC for user 103
204 Virtual PC for user A
205 Virtual PC for User B
206 Virtual PC for user C
207 Virtual PC for user D
208 Virtual PC for user E
209 Virtual PC for user F
210 Virtual PC for user G
211 Virtual PC for user H
301 Area 302 Area 303 Area 401 Data Center 402 Data Center 403 Data Center 501 Virtual PC Server 502 Virtual PC Server 511 Virtual PC Server 512 Virtual PC Server 521 Virtual PC Server 522 Virtual PC Server 600 Arrangement Device 601 Arrangement Control Unit 602 Configuration Management Unit 603 Schedule unit 604 Map search unit 605 Access log management unit 606 Location log management unit

Claims (10)

Connected to the network,
A plurality of virtual terminal servers that execute one or a plurality of virtual terminals created in advance for use by a user;
A configuration management unit that manages configuration information of the virtual terminal server;
A terminal including an input / output device for the user to operate the virtual terminal via the network;
A schedule management unit that holds schedule information including time information and location information of the user;
An arrangement control unit that generates an arrangement pattern for specifying the virtual terminal server on which the virtual terminal is to be arranged based on the schedule information and the configuration information, and arranges the virtual terminal on the virtual terminal server according to the arrangement pattern;
An arrangement system comprising: A map search unit for identifying geographical coordinates from the location information;
The arrangement control unit selects the virtual terminal server having a short distance from the geographical coordinates as a virtual terminal server on which the virtual terminal is to be arranged from the configuration information and the geographical coordinates specified by the map search unit. Generate patterns,
The arrangement system according to claim 1. The terminal includes a measurement unit that measures a network response delay between the terminal and the virtual terminal server,
The arrangement system according to claim 1, wherein the arrangement control unit generates schedule information from a history of measurement results of the measurement unit. The terminal includes a geographic coordinate acquisition device that acquires geographic coordinates of the terminal,
The arrangement system according to claim 1, wherein the arrangement control unit generates schedule information from a history of geographic coordinates acquired by the geographic coordinate acquisition device. The arrangement system according to claim 1, wherein the arrangement control unit shuts down a virtual terminal that is not used based on the schedule information of the user. The configuration management unit further manages the number of virtual terminals executable by each virtual terminal server,
The arrangement control unit arranges each virtual terminal so that the dispersion of the distances between the terminals and the virtual terminals and the average of the distances become small so that the number of virtual terminals that can be executed by each virtual terminal server can be accommodated. The arrangement system according to claim 1, wherein a pattern is generated. In a system in which a plurality of virtual terminal servers that execute one or a plurality of virtual terminals created in advance for use by a user and user terminals are connected via a network,
The schedule management unit holds schedule information including time information and location information of the user,
An arrangement method in which an arrangement control unit generates an arrangement pattern for specifying the virtual terminal server on which the virtual terminal is to be arranged based on the schedule information, and arranges the virtual terminal on the virtual terminal server according to the arrangement pattern. The configuration management unit manages the number of executable virtual terminals of each virtual terminal server,
The placement control unit is configured so that the distribution of distances between the terminals and the average of the distances becomes small so that the number of virtual terminals that can be executed by each virtual terminal server can be reduced. Generate
The arrangement method according to claim 7. On the computer,
Run one or more virtual terminals created in advance for use by the user,
Keep schedule information including time information and location information,
Based on the schedule information, generate a placement pattern that identifies a virtual terminal server on which the virtual terminal is to be placed,
An arrangement program for arranging the virtual terminal on the virtual terminal server according to the arrangement pattern. On the computer,
Let each virtual terminal server manage the number of executable virtual terminals,
Generating an arrangement pattern of each virtual terminal so that the dispersion of the distance between the terminal and the virtual PC and the average of the distance become small so that the number of executable virtual terminals of each virtual terminal server can be accommodated.
The arrangement program according to claim 9.

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