// Replace the content in <>
// For example: “familiarity with basic concepts in networking, database operations, and data encryption” or “familiarity with <software>.”
// Include links if helpful. 
// You don't need to list AWS services or point to general info about AWS; the boilerplate already covers this.

This Quick Start also assumes familiarity with Microsoft licensing.

=== Dedicated Hosts configuration option

When planning your {partner-product-short-name} configuration, identify the instance capacity per host and supported instance size on the host. These values vary between different instance families that are available when building your {partner-product-short-name} environment.

Powered by the AWS Nitro System, {partner-product-short-name} support multiple instance types within the same instance family on a host. For example, when you allocate an R5 Dedicated Host, you can use a host with two 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 that is associated with the host.

Support for multiple instance types on the same Dedicated Host is available for the following instance families: c5, m5, r5, c5n, r5n, and m5n.

Instance families that come with Instant Store (local NVme) support only a single instance size on the same Dedicated Host. If using the r5d instance family, choose a single instance size during allocation.

The following table shows instance capacity and size for r5d. For example, the r5d.2xlarge instance type provides a capacity of a 12-instance capacity on the host. 

[width="25%",options="header",]
|=======
|Instance family|Sockets|Physical cores |large|xlarge|2xlarge|4xlarge|8xlarge|16xlarge|24xlarge
|r5d |2| 48 | 48| 24 | 12 | 6 | 2|2 |1
|r5 |2| 48 | 48| 24 | 12 | 6 | 2|2 |1
|=======

For more information, see https://www.amazonaws.cn/en/ec2/dedicated-hosts/config/[Amazon EC2 Dedicated Hosts Configuration].


=== Maintain license count

The Quick Start uses the *LicenseCount* parameter to configure the optional License Manager *License Count* parameter. This value represents the total number of licenses managed by the configuration rule.

License Manager can track license counts by core or vCPU. The Quick Start *LicenseType* parameter selects this preference during deployment.

To learn more about License Manager parameters and rules, see https://docs.aws.amazon.com/license-manager/latest/userguide/config-overview.html[License configuration parameters and rules].


=== License affinity to host

The Quick Start is configured to follow the 90 days clause, which states that a Microsoft license cannot be reassigned within 90 days. This ability to enforce assignment rules further simplifies the Windows Server and SQL Server BYOL experience on AWS. 

Within License Manager configuration, the Quick Start sets the *License affinity to host (in days)* rule to *90 days*. This rule restricts license usage to the host for 90 days. After the affinity period is over, you can reuse the license within 24 hours.

To learn more, see https://docs.aws.amazon.com/license-manager/latest/userguide/config-overview.html[License configuration parameters and rules].