Memory-Optimized DeHs

Overview

Memory-optimized DeHs are designed for processing large-scale data sets in the memory. They use the latest Intel Xeon Skylake CPUs, network acceleration engines, and Data Plane Development Kit (DPDK) to provide higher network performance. They provide a maximum of 512 GiB of DDR4 memory for high-memory computing applications.

Memory-optimized DeHs are classified into m3, m7n, and m6 DeHs.

M6 ECSs can be deployed on m6 DeHs.
m7n DeHs can house M7n ECSs.

DeH Specifications

**Table 1** Specifications of m3 DeHs
Flavor Type	Number of CPUs (Sockets)	Number of Physical Cores	Hardware Specifications	Number of vCPUs
m3	2	18	CPU: Intel® Xeon® Skylake 6151 v5 (frequency: 3.00 GHz; turbo frequency: 3.40 GHz) Memory: 512 GiB (or 524,288 MiB)	64

**Table 2** Specifications of m6 DeHs
Flavor Type	Number of CPUs (Sockets)	Number of Physical Cores	Hardware Specifications	Number of vCPUs
m6	2	22	CPU: Intel Cascade Lake 6266 (frequency: 3.00 GHz; turbo frequency: 3.40 GHz) Memory: 608 GiB (or 622,592 MiB)	76

**Table 3** Specifications of m7n DeHs
Flavor Type	Number of CPUs (Sockets)	Number of Physical Cores	Hardware Specifications	Number of vCPUs
m7n	2	28	CPU: 3rd Generation Intel® Xeon® Scalable Processor (frequency: 2.60 GHz; turbo frequency: 3.40 GHz) Memory: 784 GiB (or 802,816 MiB)	98

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

m3 DeHs
vCPUs = (2 x 18 x 2 – 12) x 1.07 = 64
m6 DeHs
vCPUs = (2 x 22 x 2 – 12) x 1 = 76
m7n DeHs
vCPUs = (2 x 28 x 2 – 14) x 1 = 98

ECSs Allowed on DeHs

**Table 4** ECS flavors allowed on m3 DeHs
ECS Flavor	vCPUs	Memory (GiB)
m3.large.8	2	16
m3.xlarge.8	4	32
m3.2xlarge.8	8	64
m3.3xlarge.8	12	96
m3.4xlarge.8	16	128
m3.6xlarge.8	24	192
m3.8xlarge.8	32	256
m3.15xlarge.8	60	512
m3.16xlarge.8	64	512

**Table 5** ECS flavors allowed on m6 DeHs
ECS Flavor	vCPUs	Memory (GiB)	Maximum Number of ECSs on a DeH
m6.large.8	2	16	37
m6.xlarge.8	4	32	18
m6.2xlarge.8	8	64	8
m6.3xlarge.8	12	96	6
m6.4xlarge.8	16	128	4
m6.6xlarge.8	24	192	3
m6.8xlarge.8	32	256	2
m6.16xlarge.8	64	512	1

**Table 6** ECS flavors allowed on m7n DeHs
ECS Flavor	vCPUs	Memory (RAM in GiB)
m7n.large.8	2	16
m7n.xlarge.8	4	32
m7n.2xlarge.8	8	64
m7n.3xlarge.8	12	96
m7n.4xlarge.8	16	128
m7n.6xlarge.8	24	192
m7n.8xlarge.8	32	256
m7n.12xlarge.8	48	384
m7n.16xlarge.8	64	512
m7n.24xlarge.8	96	768