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Amazon EC2 Dedicated Hosts Configuration

Dedicated Hosts powered by the Amazon Web Services 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	-	-	-
c6g	1	64	64	32	16	8	-	4	-	2	-	-	1	1	-	-	-	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
m6g	1	64	64	32	16	8	-	4	-	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
r6g	1	64	64	32	16	8	-	4	-	2	-	-	1	1	-	-	-	1
x1	4	72	-	-	-	-	-	-	-	-	-	-	-	2	-	-	1	-

For Dedicated Hosts powered by the Amazon Web Services 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