‫Okay, so we are getting to a new section
‫on Global Infrastructure in AWS.
‫So why would you make a global application?
‫Well, a global application is an application
‫that will be deployed in multiple geographies.
‫And when you translate this onto AWS,
‫that could mean that you deploy your application
‫onto different AWS Regions or Edge Locations.
‫What this gives you is that for users around the world,
‫they will have decreased latency.
‫So latency is the time it takes for a network packet
‫to reach a server.
‫And so if you consider that the earth is big,
‫it will take a lot of time for,
‫I mean a "lot"
‫it would take more time for a packet
‫from Asia to reach the US.
‫So if you have a user in India, for example,
‫and your server is in the US,
‫they will have more lag,
‫it will be having more latency,
‫but if you deploy your application closer to users,
‫they will have a better experience.
‫So if we deploy our application in the US and in Asia,
‫then both our users in the US,
‫and both our users in Asia will have a better latency,
‫because it will be fast to reach your application servers.
‫So that will be the first reason.
‫The second reason would be to have a disaster recovery plan.
‫So the idea is that you don't wanna rely on
‫only one data center or one region.
‫For example, if an entire region goes down,
‫this has never happened
‫but it may happen someday,
‫because of an earthquake or a storm,
‫a power shutdown, politics, whatever,
‫then by having a disaster recovery strategy in place,
‫you can fail-over to another region
‫and your application will still be working.
‫So having a DR plan, a disaster recovery plan,
‫is super important
‫to increase the availability of your application.
‫Finally, the last reason why you would have
‫a global application is in case you are under attack.
‫So it is coming for hackers online
‫to attack your application,
‫to try to take it down for various reasons.
‫And so if you have your application across multiple regions
‫and distributed globally,
‫then it's going to be much harder for an attacker
‫to attack all of these locations at once.
‫And so you are more protected against these attacks.
‫Now AWS, they have this really cool website
‫that I will show you in a second,
‫which shows you all the regions,
‫Availability Zones and so on.
‫And so this will show you the regions,
‫this is where we are deploying our applications
‫and infrastructure.
‫And the regions, as we know,
‫they're made of multiple Availability Zones,
‫they are made themselves of multiple data centers.
‫And then we have Edge Locations.
‫We haven't seen them yet,
‫but they're called also Points of Presence,
‫and they're used for content delivery
‫to be as close as possible to users.
‫And then let's have a look at this website right now
‫to see how it works.
‫So this website shows you a map of the world,
‫and if you click on it,
‫you're able to look around the globe
‫and see where AWS has some presence.
‫So every orange box is going to be a region,
‫and as you can see you have regions all around the world,
‫but not everywhere.
‫And right now, if you click on regions,
‫you will see where they are
‫and how they are structured and so on.
‫And so for example, for Europe,
‫your region's Spain, London,
‫Ireland, Paris, Frankfurt, Milan, and Stockholm.
‫Then it is talking about Availability Zones.
‫So if we look at,
‫for example, a region like Northern Virginia,
‫this is a region right here,
‫but we have six blue points.
‫So we have six AZ in the Northern Virginia region.
‫But if we look for example at Europe
‫and we look at the Paris region,
‫we can see we have three blue dots around it,
‫so there're three Availability Zones.
‫So these AZ as you can see,
‫they're distant from one another
‫because in case something happens,
‫for example, North of Paris,
‫then the AZ South of Paris should not be affected,
‫but still these AZ are linked
‫by some very, very fast network.
‫So these are the AZ
‫and we can see every region has multiple AZ.
‫And then you have Points of Presence.
‫So these are the pink dots in this map,
‫and they are for content delivery networks,
‫so you cannot deploy an application there,
‫but something like CloudFront will be using it,
‫and we'll look at CloudFront in this section.
‫So as we can see, if we look at California,
‫we have the pink dots right here,
‫all around the US,
‫so that even your users that are close to the Mexico border
‫or even are in Mexico,
‫get some fast connection to AWS, okay?
‫And finally, obviously the network.
‫So these are the actual links between all the regions
‫and all the AZs and all the Points of Presence.
‫And the network is really, really stable.
‫This is actually a network from AWS.
‫So all of this is private.
‫So AWS went above and beyond
‫and actually installed cables under the water
‫to link for example, between Europe and the US
‫or to link between Europe and Africa and so on.
‫So this is a really cool map, I really like it.
‫But as you can see, the extent of network is huge,
‫and this is a private network,
‫which helps AWS have some fast and reliable connection
‫between all their different zones and regions.
‫So that's it, that's what I went through with this website,
‫have a look, I think it's really cool to get an idea of how
‫the cloud really can help you have a global presence.
‫So to summarize on AWS,
‫for the Global DNS, we're going to learn about Route 53.
‫It is going to help us route the users
‫to the closest deployment with the least latency.
‫And it's going to be great for disaster recovery strategies.
‫Then for Global Content Delivery Network,
‫a CDN will be using CloudFront,
‫and it's going to be able to replicate
‫parts of our applications into these Edge Locations
‫to again, decrease the latency for our users
‫and also cache the common request
‫to give an improved user experience
‫and a decreased latency.
‫Then we'll see about S3 Transfer Acceleration
‫to accelerate the global uploads and downloads
‫into Amazon S3.
‫And finally, the AWS Global Accelerator,
‫which is going to improve
‫the global application availability and performance
‫using the AWS global network.
‫So we have a busy section, I hope you're excited,
‫and I will see you in the next lecture.