doc-exports/docs/deh/umn/deh_01_0006.html

General-Purpose DeHs

Overview

General-purpose DeHs can accommodate ECSs with regular workloads and short-term workload surges. They use a CPU-unbound scheduling scheme. vCPUs are randomly allocated to idle CPU hyper threads based on the system loads. If traffic loads are light, the computing performance is high. However, if traffic loads are heavy, vCPUs of different ECSs compete for physical CPU resources, resulting in unstable computing performance.

General-purpose DeHs are classified into s2, s2-medium, and s3 types.

• DeHs of the s2 type can be used to deploy the S2 ECSs. The s2 DeHs use the latest-generation Intel® Xeon® Skylake CPUs, providing better cost-effectiveness.
• The s2-medium DeHs are similar to s2 DeHs and can be used to deploy the S2 ECSs.
• S3 ECSs can be deployed on s3 DeHs.

DeH Specifications

Table 1 Specifications of s2 DeHs

Flavor Type	Number of Sockets	Number of Cores per Socket	Hardware Specifications	Number of vCPUs
s2	2	22	CPU: Intel® Xeon® Processor Gold 6161 (30.25 MB Cache, 2.20 GHz) Memory: 704 GB (or 720,896 MB)	144

Table 2 Specifications of s2-medium DeHs

Flavor Type	Number of Sockets	Number of Cores per Socket	Hardware Specifications	Number of vCPUs
s2-medium	2	12	CPU: Intel® Xeon® Processor Gold 5118 (16.5 MB L3 Cache, 2.30 GHz) Memory: 328 GB (or 335,872 MB)	72

Table 3 Specifications of s3 DeHs

Flavor Type	Number of Sockets	Number of Cores per Socket	Hardware Specifications	Number of vCPUs
s3	2	26	CPU: Intel Cascade Lake 6278 (frequency: 2.60 GHz, turbo frequency: 3.50 GHz) Memory: 702 GB (or 718,848 MB)	264

Number of vCPUs = (Number of sockets x Number of cores x Number of single-core threads – CPU overheads) x CPU overcommitment ratio

• s2 DeHs

  vCPUs = (2 x 22 x 2 – 16) x 2 = 144

• s2-medium DeHs

  vCPUs = (2 x 12 x 2 – 12) x 2 = 72

• s3 DeHs

  vCPUs = (2 x 26 x 2 – 16) x 3 = 264

ECSs Allowed on DeHs

Table 4 ECS flavors allowed on s2 DeHs

ECS Flavor	vCPUs	Memory (RAM in GiB)
s2.medium.1	1	1
s2.large.1	2	2
s2.xlarge.1	4	4
s2.2xlarge.1	8	8
s2.4xlarge.1	16	16
s2.8xlarge.1	32	32
s2.medium.2	1	2
s2.large.2	2	4
s2.xlarge.2	4	8
s2.2xlarge.2	8	16
s2.4xlarge.2	16	32
s2.8xlarge.2	32	64
s2.medium.4	1	4
s2.large.4	2	8
s2.xlarge.4	4	16
s2.2xlarge.4	8	32
s2.4xlarge.4	16	64
s2.8xlarge.4	32	128
s2.medium.8	1	8
s2.large.8	2	16
s2.xlarge.8	4	32
s2.2xlarge.8	8	64
s2.4xlarge.8	16	128
s2.8xlarge.8	32	256

Table 5 ECS flavors allowed on s2-medium DeHs

ECS Flavor	vCPUs	Memory (RAM in GiB)
s2.medium.1	1	1
s2.large.1	2	2
s2.xlarge.1	4	4
s2.2xlarge.1	8	8
s2.4xlarge.1	16	16
s2.8xlarge.1	32	32
s2.medium.2	1	2
s2.large.2	2	4
s2.xlarge.2	4	8
s2.2xlarge.2	8	16
s2.4xlarge.2	16	32
s2.8xlarge.2	32	64
s2.medium.4	1	4
s2.large.4	2	8
s2.xlarge.4	4	16
s2.2xlarge.4	8	32
s2.4xlarge.4	16	64
s2.8xlarge.4	32	128
s2.medium.8	1	8
s2.large.8	2	16
s2.xlarge.8	4	32
s2.2xlarge.8	8	64
s2.4xlarge.8	16	128
s2.8xlarge.8	32	256

Table 6 ECS flavors allowed on s3 DeHs

ECS Flavor	vCPUs	Memory (RAM in GiB)
s3.medium.1	1	1
s3.large.1	2	2
s3.xlarge.1	4	4
s3.2xlarge.1	8	8
s3.4xlarge.1	16	16
s3.8xlarge.1	32	32
s3.medium.2	1	2
s3.large.2	2	4
s3.xlarge.2	4	8
s3.2xlarge.2	8	16
s3.4xlarge.2	16	32
s3.8xlarge.2	32	64
s3.medium.4	1	4
s3.large.4	2	8
s3.xlarge.4	4	16
s3.2xlarge.4	8	32
s3.4xlarge.4	16	64
s3.8xlarge.4	32	128
s3.medium.8	1	8
s3.large.8	2	16
s3.xlarge.8	4	32
s3.2xlarge.8	8	64
s3.4xlarge.8	16	128
s3.8xlarge.8	32	256

Parent topic: Categories and Types