AWS Regions

What is a Region?

• Region is a physical location around the world where a "cluster of data centers" is present.

• AWS has Regions all around the world.

AWS Availability Zones (AZ's)

What is a Availability Zone?

• An AZ is one or more discrete data centers with redundant power, networking, and connectivity in an AWS Region.

• Any Region will have at least 2 AZ's or at most 6 AZ's.

• All AZ's in any Region are

  • separate from one another, so that they're isolated from disasters.
  • connected with high bandwidth, ultra low latency.

Why Availability Zones?

• Highly Available : Production apps and databases are available at all AZ's of a Region, at the same time.

• Fault Tolerant : now even if anyone of the AZ goes down due to some disaster, other AZ's can back it up.

• Scalable : with multiple data center's (AZ's) within a single Region, we are capable of easily expanding or upgrading on demand as per our requirements.