Advantages of Multi-AZ deployments

Understand the single and multiple availability zones that Cloudera Operational Database (COD) supports along with the advantages of deploying Multi-AZ.

COD in a single availability zone

Without multiple availability zone based deployments, CDP Control Plane deploys COD and Data Hubs into a single subnet, meaning that each of them has VMs spread across a single availability zone.

COD in a multiple availability zone

If you choose to deploy your COD Environment and Data Hubs across multiple availability zones (multi-AZ), each of these components could be spread across two or more availability zones, providing high availability, resilience, and fault tolerance.

Table 1. Key advantages
Advantages	Descriptions
High availability	Supports high availability for your application with automatic database failover. It ensures that you do not lose any data and zero manual intervention.
Resilience	Ensures that the data on your standby database instance is up-to-date with the primary.
Fault tolerance	Enhances availability by deploying a standby instance in a second AZ, and achieve fault tolerance in the event of an AZ or database instance failure.