Regions and Availability Zones
Regions
A region is composed of several isolated and physically separated availability zones within a geographical area (usually a city). SurferCloud provides dozens of regions globally, covering China (Hong Kong, Taiwan), North America, South America, Europe, Asia-Pacific region, and the Middle East.
Availability Zones
Availability zones are a set of physically and electrically isolated resource combinations. An availability zone may be designed by combining one or more data centers. There is a certain physical distance between multiple availability zones, which can better prevent the impact of power outages, fires, or natural disasters such as typhoons and earthquakes. Availability zones make partitioned applications easier to achieve high availability. After reasonable partition design, the scope of failure impact will be isolated within a single availability zone.
Delay
The "Delay" perceived by users includes application layer processing Delay and network layer transmission and propagation Delay. Among them:
- Application layer processing Delay is related to the load of your computing nodes
- Network layer transmission and propagation Delay refer to the following formula
Network layer transmission and propagation Delay = Virtual network processing Delay + Host network card transmission Delay + Physical network propagation Delay
- When two computing nodes are in the same availability zone, their network layer transmission and propagation Delay is usually within 0.5ms
- When two computing nodes are in the same region but different availability zones, their network layer transmission and propagation Delay is usually within 2ms
- The actual Delay is based on the ping test data of the two computing nodes
