3.2. Compute Resource (Dedicated Device)

Compute Resource (Dedicated Device) is a service that provides virtual equipment (Compute Resources) by combining CPUs, Memory, and Disks to create Virtual Machines. Compute Resources are provided by virtualizing physical servers and storage devices within a physical enclosure dedicated to you.
You can use multiple dedicated devices in the Data Center that you are using.

3.2.1. Available Features

You can use the following features in Compute Resource (Dedicated Device).
  Feature Overview
1 Provision of Compute Resource Pools
You can create and use multiple Compute Resource Pools (CPU/Memory/Disk) to create a Virtual Machine.
However, in Compute Resource you use your own dedicated physical servers and storage devices provided by NTT Communications.
2 Features for controlling Compute Resource Pools
You can perform the following actions for Compute Resource Pools.
  • Specify the values (reserved values) to guarantee Disk resources
  • Add, delete, or change a Compute Resource Pool

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Note

  • Compute Resource (Dedicated Device) is a service that provides the same features as Compute Resource, the service in which physical equipment is shared with other users. This section explains the differences between the two services. For information regarding Compute Resource, refer to “3.1 Compute Resource”.
  • You can select storage devices from a storage class (Premium or Premium+) that offers the appropriate performance level for your intended use.

3.2.2. Provision of Compute Resource Pools

In Compute Resource (Dedicated Device), you can use Compute Resources (CPU/Memory/Disk) that are comprised of your own dedicated physical servers and storage devices provided by NTT Communications. In addition, you can divide your Compute Resources into multiple Compute Resource Pools.
To add, delete, or change a Compute Resource Pool, please submit the application specified separately.
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Important

  • You may not be able to add, delete, or change a Compute Resource Pool, depending on the compute resource usage conditions.
Usage Units
You can add or reduce the physical servers (regular servers and standby servers) and storage devices handled by dedicated devices within the ranges shown below.
To add, delete, or change a physical server, please submit the application specified separately.
Dedicated Device Lower Limit Upper Limit Application Unit
Regular servers 1 18 1
Standby server 1 2 1
Storage device 1 1 -

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Important

  • In Compute Resource (Dedicated Device), the physical server is combined with an HA cluster configuration. You therefore need a total of two servers, one regular server and one standby server, as the minimum configuration for one dedicated device.
  • You may not be able to add or delete a physical server, depending on the compute resource usage conditions.
The amount of resource that could be distributed to each compute resource pool from the dedicated device is as follows.
Resource Minimum Maximum Unit
CPU 1 GHz Total amount of CPU resource of HA Cluster [Active Server] 1 GHz
Memory 1 GB Total amount of Memory resource of HA Cluster [Active Server] 1 GB
Disk 50 GB Disk resource of Storage Device 50 GB

Note

  • There is no limit for total disk capacity. However, the total disk capacity (no limit) + Memory Resource (different for each Compute Class) must be below the amount of space left in storage resource.
Classes The Compute Resource Pool is comprised of two classes: a Compute Class (CPU and Memory) provided by a physical server, and a storage class (Disks) provided by a storage device. You can choose from three different service class (Small/Medium/Large) that has different resource capacity. Storage classes are separated into two types of service classes (Premium and Premium+) with different levels of Disk performance. You can select the class that is appropriate for your intended use.
Classes Resource Service Class Details
Compute Class(Physical server) CPU Memory Small The Physical Server of Small is the smallest. The physical server of Small provides smaller CPU Resourceand Memory Resource than Medium.
Medium The Physical Server of Medium is larger than that of Small and smaller than that of Large. The physical server of Medium provides larger CPU Resourceand Memory Resource than Small.
Large The Physical Server of Large is the largest. The Physical Server of Large provides the largest CPU Resource and Memory. The CPU performance is higher than that of Medium.
Storage Class(Storage device) Disk Premium Provides a Disk resource with high-speed Disk performance (equivalent to iSCSI).
Premium+ Provides a Disk resource with faster Disk performance than Premium (equivalent to FC).

Physical server performance
The physical configurations of one physical server that are provided are shown below.
Generation Class Number of physical CPU sockets Total of physical CPU cores CPU*(GHz) Memory*(GB) CPU processing capacity
Generation1 Small 2 16 32 128 Intel Xeon2.0GHz
Medium 4 32 70.4 192 Intel Xeon2.0GHz
Large 4 32 86.4 768 Intel Xeon2.0GHz
Generation2 Small 2 16 41.6 128 Intel Xeon2.6GHz
Medium 4 32 83.2 192 Intel Xeon2.6GHz
Large 4 32 83.2 768 Intel Xeon2.6GHz
Generation3 Small 2 16 38.4 128 Intel Xeon2.4GHz
Medium 4 40 80 192 Intel Xeon2.0GHz
Large 4 40 80 768 Intel Xeon2.0GHz
* About 10%-15% overhead is required for virtualization. So Customer can use the following amount resource approximately. As of February, 2015.

Available Resource by 1 physical server (as of December 2015)
Generation Class CPU Resource(GHz) Memory Resource(GB)
Generation1 Small 27 115
Medium 65 182
Large 80 730
Generation2 Small 35 115
Medium 75 176
Large 75 729
Generation3 Small 32 115
Medium 72 176
Large 72 729

Note

  • The processing capacity of a CPU that provides 1 GHz of CPU resource is equivalent to the processing capacity when the physical processor above operates at 1 GHz.
  • In Compute Resource (Dedicated Device), you can set three parameters for the CPU resources, Memory resources, and Disk resources in order to effectively utilize the resources that can be assigned to the Virtual Machine. For details, refer to “3.2.3 Parameter Settings for Resources
Disk resources provided by the storage device
For storage devices, you can select the storage class and plan that is appropriate for your intended use.
The storage devices and resources that can be selected when you start using the equipment are shown below.
Storage Class Plans Disk Resources
Premium 3 TB 3,072 GB
6 TB 6,144 GB
9 TB 9,216 GB
12 TB 12,288 GB
15 TB 15,360 GB
18 TB 18,432 GB
21 TB 21,504 GB
24 TB 24,576 GB
Premium+ 3 TB 3,072 GB
6 TB 6,144 GB
9 TB 9,216 GB
12 TB 12,288 GB
15 TB 15,360 GB
18 TB 18,432 GB
21 TB 21,504 GB
24 TB 24,576 GB

[Reference] Target I/O performance for each storage class
  Interface Target I/O Performance
Premium Equivalent to iSCSI Approx. 8,300 IOPS/24 TB, approx. 1,800 IOPS/3 TB
Premium+ Equivalent to Fiber Channel Approx. 18,600 IOPS/24 TB, approx. 5,700 IOPS/3 TB

IOPS is one performance measure for Memory devices (such as hard Disks).
It is the number of times that a read/write can be performed in one second under certain conditions. The IOPS values above are the performance values measured under the following conditions.
Measurement condition One Virtual Machine was created in a Compute Resource Pool, benchmarking was performed multiple times, and the average value was calculated.
Virtual machine conditions vCPU 8
Memory 16 GB
Guest OS Red Hat Enterprise Linux 6.2
Benchmark tool fio
Settings parameters

direct=1 (measured in unbuffered I/O)

runtime=300 (measurement time is 300 seconds)

size=16GB (test file size is 16 GB)

readwrite=RandomReadWrite (measured in random read/writes)

rwmixread=50 (read/write ratio is 50:50)

blocksize=4k (block size is 4 kbyte)


HA Cluster Feature
The same HA Cluster feature that is provided in Compute Resource is also provided in Compute Resource. For details regarding the HA Cluster feature, refer to “HA Cluster Feature”.
Adding and Deleting Dedicated Devices
You can have multiple dedicated devices by reserving multiple Compute Resources (Dedicated Device).
To add or delete a dedicated device, please submit the application specified separately.
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Important

  • To delete a dedicated device, first delete all Virtual Machines that use Compute Resources on the dedicated device that you are deleting.

3.2.3. Parameter Settings for Resources

In Compute Resource (Dedicated Device), you can set limit value for the CPU resources, Memory resources, and Disk resources in order to effectively utilize the resources that can be assigned to the Virtual Machine Service Order form is needed for setting.
The items marked with a “Y” are items that can be set. For example, a limit value can be set for CPU resources and Memory resources.
Item Description CPU Memory Disk
Limit value Sets the upper limit of the resources that a Compute Resource Pool can use. Y Y -
Reservation rate Sets the percentage value of the reservation value for the limit value. Specified by NTT Communications Specified by NTT Communications -
Reservation value Sets the resource value that the Compute Resource Pool can definitely use. Specified by NTT Communications Specified by NTT Communications Y

CPU Resources
You can add or reduce CPU resources within the ranges shown below.
  Lower Limit Upper Limit Setting Unit
Limit value 1 GHz The resource value provided by the HA cluster 1 GHz

Memory Resources
You can add or reduce Memory resources within the ranges shown below.
  Lower Limit Upper Limit Setting Unit
Limit value 1 GB The resource value provided by the HA cluster 1 GB

Disk Resources
You can add or reduce Disk resources within the ranges shown below.
  Lower Limit Upper Limit Setting Unit
Reservation value 50 GB Disk resources provided by the storage device 1 GB

Important

  • The total of the Disk resource reserved rates for all Compute Resources that belong to the same storage device cannot exceed the Disk resources provided by that storage.

Note

  • The Disk resources listed in the Customer Portal may vary slightly from the values in the table.
  • Disk performance varies according to the storage class. For details, refer to “Class”.

3.2.4. Assigning Resources to a Virtual Machine

Create a Virtual Machine by assigning resources in a Compute Resource Pool (CPUs/Memory/Disk) to the Virtual Machine.
vCPU
The quantities of vCPUs that can be assigned to one Virtual Machine are shown below.
Customer Portal ver2.0
Service Menu Compute Class Min Max Step
Compute Resource (Dedicated Device) Small 1 16 1
Medium 1 32 1
Large 1 32 1

Note

  • The number of vCPU is up to 8 if virtual hardware version is 7. Please mark this specification when Virtual Machine image is imported.
Memory
You can add or reduce the Memory capacity that is assigned to one Virtual Machine within the ranges shown below.
Customer Portal ver2.0
Service Menu Compute Class Min Max Step
Compute Resource (Dedicated Device) Small 1 96 1
Medium 1 128 1
Large 1 512 1

Note

  • It is possible to allocate Memory to 255GB if virtual hardware version is 7. Please mark this specification when Virtual Machine image is imported.
Disk
You can add or reduce the Disk capacity and the number of data Disks connected to one Virtual Machine within the ranges shown below.
Customer Portal ver2.0
  Lower Limit Upper Limit Setting Unit
Number of data Disks 0 59 1
Disk capacity 1 GB 2,047 GB 1 GB
1 MB 2,097,151 MB 1 MB

Note

  • The total disk capacity that could be assigned must be the amount which subtracts the memory capacity assigned to Virtual Machine from the leftover disk capacity of Compute Resource Pool.
  • In case of using 6TB Storage plan if the leftover of Storage Resource for Compute Resource Pool is 6,000GB, and 128GB memory is being mounted, the maximum of total disk capacity is 5,872GB (= 6,000-128).
    For example:
    Root disk:80GB
    Data disk1:2000GB
    Data disk2:2000GB
    Data Disk3:1872GB

3.2.5. Important Points

  • You cannot “change the storage class (Premium or Premium+)” or “add one or more storage devices.” You therefore need to consider your future storage usage plan when selecting a storage class at the time of your application.
  • You can “change your storage device plan (add a Disk resource). However, you cannot change to a plan that decreases the Disk resource value.
  • If you “change your storage device plan,” the date that the change application takes effect becomes the new starting date for calculating the minimum usage period for your contract.
  • Different Compute Class (Small, Medium, Large) and generation cannot create the same cluster. The same class and generation of the physical server can be added within the limit range.
  • Please refer to “Service provided in each Data Center”.
Suspended new sales of the Compute Resource (Dedicated Device)
  • New sale of Compute Resource (Dedicated Device) below is or will be suspended.
    • Generation1 all Class
    • Genaration2 all Class