‫[Speaker Not Visually Identified]Okay.
‫So, now let us discuss, Disaster Recovery Strategies.
‫In the exam, we'll just ask you.
‫Hey, which one is the cheapest.
‫So the cheapest is backup and restore,
‫but I want to give you more information, obviously.
‫So backup and restore is when your data is backed up into
‫the cloud. And then in case of a disaster,
‫you're going to restore it somewhere else.
‫And you can get back your application this way.
‫So, because the data is just being backed up
‫and your application is not running.
‫It will be only running when you restore it into
‫whatever place you want.
‫Then the cost is very, very minimum.
‫Because you're just backing up data over time.
‫This is it why the backup and restore
‫disaster recovery strategy is the cheapest.
‫Next we have pilot lights.
‫Pilot Light is saying that, hey,
‫we have the cloud and we're going to run the core functions
‫of the app. For example, just the database.
‫We have just a database in the cloud and it's ready to
‫scale, but it has a minimal setup.
‫So, the database is here, but it's not fully scaled.
‫And we don't have our application servers.
‫We just have a pilot lights.
‫And this is just, you say
‫with the minimal critical functions of the app are
‫up in the cloud, at a minimal setup.
‫So it's a little bit more expensive than backup and restore.
‫And if you needed to do a disaster recovery strategy,
‫then you need to obviously upgraded database type,
‫and start your application servers.
‫But at least you core functions of the app
‫is ready to be here.
‫Next we have warm standby.
‫And warm standby is going to be more expensive.
‫So here we have the full version of the app ready in the
‫cloud, but at minimum size.
‫And so if we need to do a disaster recovery strategy,
‫we just need to increase the size of the app
‫and we're good to go.
‫As we see, the cost is a bit higher for this.
‫And then finally we have multi-site hot sites,
‫and this is where we have the full version of the app
‫at full size, ready to be used no matter what.
‫And so this has the maximum amount of costs because well,
‫you have a department that's ready to use in case of
‫disaster is right away.
‫So this is what you need to know.
‫And again, just remember the which one's the cheapest,
‫which one is the most expensive and why,
‫but again,
‫at a high level, the examiner will just say,
‫hey, what's the cheapest one.
‫And it's going to be backup and restore obviously.
‫Okay.
‫So in the cloud, we can also do this to recovery,
‫It is multi-region.
‫So say we have our instance in us-east-one,
‫and there's a disaster that strikes us-east-one.
‫Then we can fill over all our traffic into another region.
‫For example, eu-west-two using route 53.
‫This could be a very possible setup.
‫So let's say for this to recovery,
‫definitely more in depth to know for
‫the disaster recovery strategies course,
‫but for the CCP level,
‫you have all you need.
‫That's it.
‫I will see you in the next lecture.