VVDs - Regions & Availability Zones Characteristics
Availability Zone Characteristics
It is isolated from the other availability zones to prevent the propagation of failure or outage across the data center. These are considered as 2 distinct data centers in a metro distance. The following could be the possible scenarios
Different Racks in single DC
Different rooms in a single building
Different rooms spread in multiple buildings
Characteristics of AZ
Outage prevention against loss of Power, cooling.
Reliability. It is a physically distinct, independent infrastructure. Each availability zone should have independent power, cooling, network and security, UPS, generators.
Distance between Zones: the distance between zone is short enough to get less than 5 ms latency and larger bandwidth (10 Gbps) between zones. You can operate workloads across multiple zones to suite your HA requirements.
The availability zone in simple terms is to protect against failures of individual components e.g. host, switch, etc. Having multiple availability zones minimizes the downtime of services and improve SLAs.
Regions serve more than one purpose
To Support DR Solution
Address data privacy laws and restrictions specific to regions
Place near the service consumption.
Will have different naming convention
The region can be in 2 different geographies separated by at least 100 KM
Latency, however, must be less than 100 ms.
Availability zone targets first-level disaster avoidance while regions is to protect against site failover