JP6669614B2 - Controller for system including data center and optical network - Google Patents

Description

  The present disclosure relates to a control device for a system including a plurality of data centers and an optical network interconnecting the plurality of data centers.

  Non-Patent Document 1 discloses a distributed data center in which small data centers are geographically dispersed to provide a cloud service. With a distributed data center, a user can connect to a data center with low delay and receive service. Non-Patent Document 2 discloses a configuration in which computer resources of a data center are virtualized and the number of computer resources requested by a user is used by the user.

"Data Center 2025: Exploring the Positions", [online], Internet <http: // www. emersonnetworkpower. com / en-US / Latest-Thinking / Data-Center-2025 / Pages / default. aspx> M. Bari, et al. , "Data center network virtualization: a survey", IEEE Communications surveys & tutorials, Vol. 15, No. 2, pp. 909-928, 2013

  Consider a case where a user accesses a distributed data center using a mobile device and receives a service. In this case, even if the mobile device used by the user is connected to a data center with a small delay, the number of computer resources that can be allocated in the data center may be smaller than the number of computer resources requested by the user.

  The present invention provides a control device for allocating requested computer resources even when the number of allocable computer resources in a data center connected to a mobile device is smaller than the requested number of computer resources.

  According to one aspect of the present invention, a control device for a system including a plurality of data centers each having one or more computer resources, and an optical network interconnecting the computer resources of the plurality of data centers, comprises: Holding means for holding an amount of transmission delay by the optical network between the data centers, receiving means for receiving position information from a mobile device via a mobile communication network, and information indicating the number of requested resources; First selecting means for selecting, from the plurality of data centers, a first data center to which the mobile device is to be connected, and computer resources of the requested number of resources to be allocated to the mobile device; And the optical network so that the required number of computer resources allocated to the mobile device are connected to each other. Control means for controlling the mobile device, the first selecting means notifies the mobile device of information for the mobile device to connect to the first data center via the mobile communication network, The second selecting means, if the number of computer resources of the first data center that can be allocated to the mobile device is less than the requested number of resources, the first data center and the second one of the plurality of data centers. A second data center is selected based on the amount of transmission delay with a data center other than one data center, and computer resources of the second data center are allocated to the mobile device.

  Even when the number of assignable computer resources in the data center to which the mobile device is connected is smaller than the requested number of computer resources, the requested computer resources can be assigned.

FIG. 1 is a configuration diagram of a system according to an embodiment. FIG. 9 is a sequence diagram of a process when connecting to a data center according to the embodiment. FIG. 4 is a diagram illustrating computer resource allocation according to an embodiment. FIG. 9 is a sequence diagram when a data center to be connected is changed according to the embodiment; FIG. 4 is a diagram illustrating computer resource allocation according to an embodiment. FIG. 1 is a configuration diagram of a control device according to an embodiment.

  Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. In the following drawings, components not necessary for the description of the embodiment will be omitted from the drawings. The following embodiment is an exemplification, and the present invention is not limited to the content of the embodiment.

  FIG. 1 is a system configuration diagram according to the present embodiment. In FIG. 1, a plurality (N) of data centers (DCs) # 1 to #N are interconnected via an optical packet network 20. In the following, it is assumed that the DCs # 1 to #N are interconnected by the optical packet network 20, but other optical networks such as a network for setting a wavelength path may be used. Each of the DCs # 1 to #N has a plurality of computer resources. Hereinafter, one computer resource is defined as one virtual machine (VM). The DCs # 1 to #N have DC controllers 1-1 to 1-N for controlling the configurations of a plurality of VMs in the data center, respectively. Instead of providing a DC control device for each DC, one DC control device for controlling the entire DC may be provided. Hereinafter, the DC control devices 1-1 to 1-N are collectively referred to as a DC control device 1.

  The optical packet network 20 is connected to an OPS control device 2 for controlling the configuration of the optical packet network 20 and a control device 3 for controlling the entire system. The OPS control device 2 and the DC control device 1 may be configured as one device. DC # 1 to DC # N are connected to the mobile communication network 30. The mobile communication network 30 according to the present embodiment includes not only an access network and a core network in mobile communication but also a wide area network such as the Internet. The mobile device 4 using the DC computer resources can access any of DC # 1 to DC # N via the mobile communication network 30. The control device 3 is also connected to the mobile communication network 30, and the mobile device 4 can access the control device 3 via the mobile communication network 30.

  First, a procedure in which the mobile device 4 starts using computer resources will be described with reference to FIG. In the present embodiment, each DC is associated with an area. Then, the control device 3 causes the mobile device 4 to access the DC associated with the area where the mobile device 4 is located. Note that the area corresponding to a certain DC includes the installation position of the DC and is provided so as not to overlap with other areas. First, in S1, the mobile device 4 accesses the control device 3 and requests use of computer resources. This request includes the location information of the mobile device 4 and the required number of computer resources, in this example, the number of VMs. For example, assume that the mobile device 4 requests 5 VMs, and the number of available VMs at each DC at that time is as shown in FIG. Also, from the position information of the mobile device 4, the DC corresponding to the area including the position of the mobile device 4 is DC # 1, and the transmission delay amount of the communication between the DC # 1 and another DC via the optical packet network 20. Is as shown in FIG. In FIG. 2, the transmission delay amount between DCs is a value obtained by quantizing the actual transmission delay amount.

  The control device 3 allocates the number of VMs requested by the mobile device 4 in order from the DC corresponding to the position of the mobile device 4, that is, the DC to which the mobile device 4 is connected. In this example, the DC to which the mobile device 4 is connected is DC # 1. If the number of VMs that can be assigned by DC # 1 is greater than 5, which is the required number of VMs of mobile device 4, control device 3 determines that the five VMs of DC # 1 are to be assigned to mobile device 4. However, if the number of required VMs of the mobile device 4 is larger than the number of VMs that can be allocated by the DC # 1, the control device 3 will use the DC , The VMs to be assigned to the mobile device 4 are sequentially selected. In the state of FIG. 2, the number of VMs that can be assigned to DC # 1 is 1, which is smaller than 5 required by mobile device 4, and thus control device 3 allocates 1 VM of DC # 1 to mobile device 4. In addition, it is determined that a total of 3 VMs of 1 VM of DC # 2 and 2 VM of DC # 6 with the least delay amount from DC # 1 are further allocated to mobile device # 4. For the remaining 1 VM, the delay amount from DC # 1 is assigned from DC # 3 or DC # 2, which is the second smallest delay amount. Here, it is assumed that 1 VM of DC # 3 is allocated. The shaded portion in FIG. 3 indicates a VM assigned to the mobile device 4. When there are a plurality of DCs having the same delay amount, the control device 3 preferentially allocates, for example, DCs with a large number of available VMs.

  The control device 3 communicates with the DC control device 1 and the OPS control device 2 in S2, and causes the DC control device 1 to control the VM of each DC so that the assigned five VMs are connected to each other. The device 2 controls the optical packet network 20. Then, in S3, the control device 3 notifies the mobile device 4 of the connection information to the closest DC # 1. The mobile device 4 connects to the DC # 1 based on the connection information and uses five VMs.

  Subsequently, a configuration change by moving the moving device 4 will be described with reference to FIG. The mobile device 4 repeatedly transmits the position information to the control device 3 even after being connected to DC # 1, as shown in S10. The control device 3 determines the moving direction of the moving device 4 based on the position information. Here, it is assumed that mobile device 4 has moved toward the area to DC # 6. In this case, the control device 3 determines the VM allocation when the mobile device 4 is connected to the DC # 6. For example, if the transmission delay amount of the communication between the DC # 6 and another DC via the optical packet network 20 is as shown in FIG. 5, when the mobile device 4 is connected to the DC # 6, the mobile device 4 The VMs to be allocated are VMs of DC # 1, DC # 3, DC # 5, and DC # 6. That is, the VM of DC # 2 currently assigned to the mobile device 4 is deleted, and the VM of DC # 5 is newly assigned to the mobile device 4. In this case, the control device 3 notifies the DC control device 1 and the OPS control device 2 of the changed configuration in advance in S11.

  When the position of the mobile device 4 is within the area of the DC # 4 in S12, the control device 3 notifies the mobile device 4 of the connection information to the DC # 6 in S13, and the DC control device in S14. 1 and the OPS controller 2 are notified of the configuration change. Thus, the mobile device 4 connects to DC # 6 and uses 5VM. The advance notification in S11 is performed by causing the DC control device 1 and the OPS control device 2 to determine the control content in advance based on the changed configuration, and shortening the time required for the configuration change when the notification in S14 is performed. To do that.

  FIG. 6 is a configuration diagram of the control device 3 according to the present embodiment. The holding unit 31 holds a transmission delay amount between the two DCs # 1 to #N by the optical packet network 20 and information indicating a correspondence between each DC and its area. The connection destination selection unit 32 selects a DC to which the mobile device 4 is connected based on the position information from the mobile device 4. Further, the connection destination selection unit 32 notifies the mobile device 4 of information indicating the connection destination DC when selecting the DC to be selected first or when changing the DC to which the mobile device 4 is connected.

  The assigned computer resource selection unit 33 selects computer resources of the requested number of resources requested by the mobile device 4 from a plurality of DCs. When the number of computer resources that can be allocated in the DC to which the mobile device 4 is connected is equal to or greater than the required number of resources, the allocation computer resource selection unit 33 allocates the DC computer resource to which the mobile device 4 is connected to the mobile device 4. On the other hand, if the number of computer resources that can be allocated in the DC to which the mobile device 4 is connected is less than the required number of resources, the allocation computer resource selection unit 33 selects computer resources to be allocated to the mobile device 4 from another DC. At this time, the assignment computer resource selection unit 33 assigns the number of computer resources by sequentially selecting the DC having the smaller transmission delay from the DC to which the mobile device 4 is connected. Furthermore, when the DC for connecting the mobile device 4 is changed, the allocation computer resource selection unit 33 reallocates the computer resources based on the changed DC. The control unit 34 controls the DC control device 1 and the OPS control device 2 so that the computer resources allocated to the mobile device 4 are interconnected. In the present embodiment, the DC control device 1, the OPS control device 2, and the control device 3 are different devices, but these devices may be one device.

  In the above embodiment, the information indicating the correspondence between the DC and the area is held, and the mobile device 4 is connected to the DC corresponding to the area where the mobile device 4 is located. However, a configuration in which the mobile device 4 is connected to a DC closest to the mobile device 4 may be used. In this case, the control device 3 holds the correspondence between each DC and its position information. Further, when the mobile device 4 moves and the distance to another DC becomes shorter than the distance to the currently connected DC, the control device 3 changes the connection destination of the mobile device 4 to the other DC.

  As described above, according to the present embodiment, regardless of the movement of the moving device 4, the moving device 4 can be connected to the DC located near the moving device 4. Therefore, the amount of transmission delay between the mobile device 4 and the DC can be reduced. Furthermore, the number of computer resources required by the mobile device 4 can be allocated to the mobile device 4 regardless of the number of computer resources available in the DC to which the mobile device 4 is connected. When selecting a computer resource to be allocated to the mobile device 4 from a DC other than the DC to which the mobile device 4 is connected, the computer resource is selected based on a transmission delay amount with the DC. Thereby, the amount of transmission delay between computer resources allocated to the mobile device 4 can also be reduced.

  The control device 3 according to the present invention can be realized by a program that causes a computer to operate as the control device 3. These computer programs can be stored in a computer-readable storage medium or distributed via a network.

Claims (9)

A control device for a system including a plurality of data centers each having one or more computer resources, and an optical network interconnecting the computer resources of the plurality of data centers,
Holding means for holding a transmission delay amount by the optical network between the plurality of data centers;
Receiving means for receiving position information from the mobile device via the mobile communication network, and information indicating the number of requested resources;
First selection means for selecting, from the plurality of data centers, a first data center to which the mobile device is connected based on the location information;
Second selecting means for selecting, from the computer resources of the plurality of data centers, computer resources of the requested number of resources to be allocated to the mobile device;
Control means for controlling the optical network so that the requested number of computer resources are connected to each other,
With
The first selection unit notifies the mobile device of information for connecting the mobile device to the first data center via the mobile communication network,
The second selecting means, if the number of computer resources of the first data center that can be allocated to the mobile device is less than the requested number of resources, the first data center and the second one of the plurality of data centers. A control device, wherein a second data center is selected based on the transmission delay amount with respect to a data center other than one data center, and computer resources of the second data center are allocated to the mobile device.   2. The control device according to claim 1, wherein the second selection unit selects the second data center in order from a data center having the smallest transmission delay amount with respect to the first data center. 3.   The second selecting means, if the number of computer resources of the first data center that can be allocated to the mobile device is equal to or more than the required number of resources, changes the computer resources to be allocated to the mobile device from the computer resources of the first data center. The control device according to claim 1, wherein the control device is selected. The holding unit holds information indicating a correspondence between the plurality of data centers and an area,
4. The control device according to claim 1, wherein the first selection unit selects a data center corresponding to an area including a position indicated by the position information as the first data center. 5. . The mobile device, after connecting to the first data center, repeatedly transmits the position information of the mobile device to the control device,
The said 1st selection means judges change of the said 1st data center which connects the said mobile device based on the positional information repeatedly received from the said mobile device, The Claim 1 characterized by the above-mentioned. The control device according to claim 1.   If the first selection means determines that the first data center to which the mobile device is to be connected is to be changed, the second selection means reallocates computer resources to be allocated to the mobile device based on the changed first data center. The control device according to claim 5, wherein the selection is performed.   The first selecting means changes information for connecting the mobile device to the first data center after the change via the mobile communication network in order to change the first data center to which the mobile device is connected. The control device according to claim 6, wherein the control device notifies the mobile device.   The control means, when the first selection means notifies the mobile device of information for connecting the mobile device to the changed first data center via the mobile communication network, the second selection means 8. The control device according to claim 7, wherein the optical network is controlled such that the reselected computer resources are connected to each other.   A program that causes a computer to function as the control device according to claim 1.

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