What Is AZ and How Can I Select and View an AZ?

What Is an AZ?

An availability zone (AZ) is a physical region where resources use independent power supplies and networks. AZs are physically isolated but interconnected through an internal network.

There are multiple AZs in each region. If one AZ becomes faulty, other AZs in the same region continue to provide services.

AZs in the same region can communicate with each other through an internal network.

How Do I Select an AZ

You can select an AZ when you are purchasing an ECS. After the ECS is created, the AZ cannot be changed. If there is only one AZ displayed in a region, it means the region only provides one AZ.

How Do I View the AZ of an ECS?

After purchasing an ECS, you can view the AZ which the ECS belongs to on the ECS details page.

1. Go to the ECS console.
2. In the ECS list, click the name of the target ECS to go to the details page.
3. On the Summary tab, view the AZ which the ECS belongs to.
   Figure 1 Viewing the AZ of an ECS