# AWS DRS launch settings
<a name="launch-settings-overview"></a>

 The launch settings are a set of instructions that determine how drill or recovery instances are launched in AWS. They include two sections: general launch settings and the EC2 launch template. These settings are created automatically every time you add a source server to AWS Elastic Disaster Recovery. The launch settings can be modified at any time, even before a specific source server has completed its initial sync. 

**Topics**
+ [Default AWS DRS launch settings](default-drs-launch-settings.md)
+ [Default Amazon Elastic Compute Cloud (Amazon EC2) launch template](default-ec2-launch-template.md)