‫So there are two use cases
‫when you move to the cloud.
‫For example, you wanna start fresh
‫and you wanna leverage the cloud directly.
‫In this case, you don't need to do a migration.
‫But if you have on-premises servers and data centers
‫and you want to migrate to the cloud,
‫then you need to plan your migration.
‫And a way to do this is to plan your migration
‫using the AWS Application Discovery Service.
‫So the idea is that you're going to scan your servers,
‫and going to gather information
‫about the server utilization data and dependency mapping
‫which are going to be important for your migrations
‫so we can understand how to migrate
‫and what to migrate first.
‫So there are two types of migration you can do.
‫One is called the Agentless Discovery using a Connector.
‫And this gives you information around your virtual machines,
‫your configuration, your performance history
‫such as a CPU, memory, and disk usage.
‫Or you can run an agent
‫to do an Application Discovery Agent,
‫and this gives you more updates
‫and more information from within your virtual machines.
‫For example, system configuration, performance,
‫processes are running, and the details
‫of all the network connections between your systems,
‫which is good to get your dependency mapping.
‫Now, all this results data can be viewed
‫within another service called the AWS Migration Hub.
‫So this Application Discovery Service
‫really helps you to map out what you need to move
‫and how they are interconnected.
‫But then you actually need to move.
‫And the simplest way to move from on-premises
‫to AWS is using the AWS Application Migration Service,
‫also called MGN.
‫So this used to be called CloudEndure Migration,
‫but now it's been replaced.
‫And the idea is that using
‫the AWS Application Migration Service, so MGN,
‫you can do rehosting, also called lift-and-shift solution,
‫in which you convert your physical, virtual,
‫or other service on the other clouds to run natively on AWS.
‫How does that work?
‫Well, say you have a corporate data center
‫with OS apps and databases, and they run on disks.
‫What's going to happen is that you're going to run
‫the Application Migration Service.
‫And then the replication agent
‫that you have to install on your data center
‫is going to perform a continuous replication of your disks
‫so that you have, for example, low-cost EC2 instances
‫and EBS volumes that get this replication of data.
‫Now, the day you're ready to perform a cut over,
‫you can actually move from staging to production,
‫and have a bigger EC2 instance of the size you want,
‫as well as EBS volumes that match the performance you need.
‫So the idea is that you replicate data,
‫and then at some point, you do a cut over.
‫And that is by far the simplest way of doing it.
‫So this supports a wide range of platforms,
‫operating systems, and databases.
‫And this gives you minimal downtime,
‫as well as reduced costs
‫because, well, you don't need to hire complex engineers
‫to do this.
‫This is done automatically by this service.
‫So that's it.
‫I hope you liked it.
‫And I will see you in the next lecture.