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Amazon Web Services For Managers

I am asked often about the ins and outs of Amazon Web Services by C-levels, directors and managers. AWS Certifications are not searching for nitty gritty nuances of scripting with all the API of their Elastic Compute Cloudthey are just interested in the general summary of how the'cloud' works.
When explaining AWS for the very first time to managers (or anyone, for that matter) it is best to talk in theories rather than in real terms. I've also noticed it is beneficial to try to tangiblize the dialogue with recognizable terms.

In a really high degree, you can think of EC2 as a global computing environment. Within EC2 are geographic areas that may be thought of as data centers. Inside of those data centers are computer clusters that in AWS parlance are called Availability Zones:
- EC2 (believe: cloud)
------ Regions (believe: data centre )
------------- Availability Zones (believe: computer cluster)

Within an Availability Zone, we have can create virtual machines from predefined or custom Amazon Machine Images, or AMIs. An AMI is considered as a photo of machine that you can load and operate within the cloud with an Availability Zone. Every time you choose an AMI and start it, it is called an instance of the AMI. You can take an AMI and begin it several times, each time creates a new Instance.
Instances are virtual machines which are running, and I really mean they are virtual. If precautions are not taken, these virtual machines can wink out of existence and also lead to a great deal of consternation. So you do not really wish to think of an Instance as something that's robust and persistent. It's merely a component of computational resources.

Virtual Hard Drives


To help keep your information intact even when an Instance expires, you may use several different AWS services but one of the very common ones is that the Elastic Block Store, or EBS. Consider EBS as a Hard Disk. You can earn an EBS from 1GB to 1TB and'install' it on some of your digital machine Instances. Consequently, in case you experience an Instance that is running your website and you wish to make sure that the database remains healthy even if the Instance disappears, you may use an EBS'hard disk'. At the vernacular of AWS, you've generated an EBS quantity and mounted it on an case.
Other Virtual Storage
You can find other services you might have used besides EBS for carrying this imaginary database of yours. By way of instance, the SimpleDB, or SDB, is a perfectly reasonable substitute and could be favored in certain scenarios. However, SDB is a specific service for basic database delivery, whereas EBS is a generalized storage alternative. There is also the Relational Database Service, or RDS that provide robust database providers beyond SDB. The alternative of service is frequently determined by the requirements of this solution.

Virtual Backup


If we want to secure that data we have on our EBS quantity, we are not from the woods yet because even hard drives may fail. We will want to back up this into more secure storage. For this we could use the very simple Storage Option, or S3 for short. You can think about S3 as a readily accessible tape backup. Every one of these directories is called a bucket in the S3 world. As it's a good stable storage method, you will want to backup your EBS quantity (s) to S3 periodically. And, when you've customized your Instance, you will want to save a new image of it in S3 also. In this manner, if your carefully customized Instance or EBS volume crashes for any reason, you can pull them out of your copy in S3 fairly quickly and get ready to go .

Well, all of this would be worthless if we did not have great security to make sure that our solution has been hacked. Two theories are employed in AWS for security functions. The first is a set of keys which allows you and your developers to access your systems. These are public/private important pairs and digital certificates required to securely log in the case. The second, called a security group, can be thought of as a firewall configuration. You make a security group that defines how outside entities - like internet browsers, or remote desktops, or ftp, or email, etc. - can or cannot access your info.
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