Dedicated Hosts powered by the AWS Nitro System support multiple instance types within the same instance family on a host. For example, when you allocate a R5 Dedicated Host, you can use a host with 2 sockets and 48 physical cores to run different R5 instance types such as r5.2xlarge, r5.4xlarge, and others on the same host. You can run any number of instances up to the core capacity associated with the host.

The table below lists the instance family and instance size configurations supported on Dedicated Hosts. The table also includes information on the number of instances you can run for a specific instance size and family based on the physical core capacity associated with the Dedicated Host. For more information on instances, visit Amazon EC2 Product Details.

Dedicated Hosts Configuration Table

Dedicated Host Attributes

Instance Capacity Per Host by Instance Size

Instance Family

Sockets

Physical Cores

medium

large

xlarge

2xlarge

3xlarge

4xlarge

6xlarge

8xlarge

9xlarge

10xlarge

12xlarge

16xlarge

18xlarge

24xlarge

32xlarge

.metal

c4

2

20

-

16

8

4

-

2

-

1

-

-

-

-

-

-

-

-

c5

2

36

-

36

18

8

-

4

-

-

2

-

-

-

1

-

-

-

c5d

2

36

-

36

18

8

-

4

-

-

2

-

-

-

1

-

-

-

d2

2

24

-

-

8

4

-

2

-

1

-

-

-

-

-

-

-

-

g3

2

36

-

-

-

-

-

4

-

2

-

-

-

1

-

-

-

-

g4dn

2

48

-

-

-

-

-

-

-

-

-

-

2

-

-

-

-

1

i3

2

36

-

32

16

8

-

4

-

2

-

-

-

1

-

-

-

1

m4

2

24

-

22

11

5

-

2

-

-

-

1

-

-

-

-

-

-

m5

2

48

-

48

24

12

-

6

-

2

-

-

2

1

-

1

-

1

m5d

2

48

-

48

24

12

-

6

-

2

-

-

2

1

-

1

-

1

p2

2

36

-

-

16

-

-

-

-

2

-

-

-

1

-

-

-

-

p3

2

36

-

-

-

8

-

-

-

2

-

-

-

1

-

-

-

-

r4

2

36

-

32

16

8

-

4

-

2

-

-

-

1

-

-

-

-

r5

2

48

-

48

24

12

-

6

-

2

-

-

2

1

-

1

-

1

r5d

2

48

-

48

24

12

-

6

-

2

-

-

2

1

-

1

-

1

x1

4

72

-

-

-

-

-

-

-

-

-

-

-

2

-

-

1

-

For Dedicated Hosts powered by the AWS Nitro System, you can run any number of instances up to the core capacity associated with the host. The tables below give examples of how you can run different instance types on a single host. The first table shows two scenarios for a R5 Dedicated Host, where you can run different instance types to consume the 48 physical cores associated with the host. The second table shows two scenarios for a C5 Dedicated Host, where you can run different instance types to consume the 36 physical cores associated with the host.

R5 Dedicated Host

Total cores available on host

48

 

Number of instances

Instance type

Cores consumed

Scenario 1

4

r5.4xlarge

32

4

r5.2xlarge

16

Total cores consumed on host

48

Scenario 2

1

r5.12xlarge

24

1

r5.4xlarge

8

4

r5.2xlarge

16

Total cores consumed on host

48

C5 Dedicated Host

Total cores available on host

36

 

Number of instances

Instance type

Cores consumed

Scenario 1

1

c5.9xlarge

18

2

c5.4xlarge

16

1

c5.xlarge

2

Total cores consumed on host

36

Scenario 2

4

c5.4xlarge

32

1

c5.xlarge

2

2

c5.large

2

Total cores consumed on host

36