Posted by lisali at 2021-01-28 11:41
FusionCompute 8.0.2
Dear Lisa,
AZ: An available zone (AZ) is a logical zone of physical resources (computing, storage, and network resources).
Region:
Region is a geographic concept of Layer 0. Region can be considered as a circle with the access latency as its radius.
Access latency: Users in a region receive services within a latency shorter than a specific value, for example, 100 ms.
Coverage: Service quality cannot be guaranteed beyond the radius (latency). In this case, another Region is required to build new DCs for service provisioning.
Geographic DR: Regions are geographically diverse and allow geographical redundancy in different levels.
Region planning in a project must consider physical locations and network solutions.
Planning principle
If the latency between two physical DCs exceeds 2 ms, the DCs must belong to different regions.
Within a region, the volume of management, storage, and service traffic between devices is high, requiring large bandwidth. It is recommended that a region does not belong to different physical DCs.
Within a region, the management planes of different devices can communicate with each other. If a project has strict security requirements, services with high security requirements can be deployed in an independent region.
Cloud Server Disaster Recovery (CSDR) provides the cross-region DR capability. When the CSDR service is required, you need to plan a production region and a DR region.
A region can contain multiple AZs. An AZ is included in a Region and cannot span across a Region. Multiple AZs within a Region are interconnected using high-speed optical fibers to meet requirements of building cross-AZ high-availability systems. Each AZ can contain one or multiple host groups.
Resource pool type: Different types of computing resource pools must be divided into different AZs, for example, bare metal server pools, VM pools, and converged resource pools.
Reliability: Physical resources in an AZ share the reliability fault points, such as the power supply, disk array, and switch. If users want to implement cross-AZ reliability for service applications (for example, deploy VMs running service applications in two AZs), they must plan multiple AZs.
Cloud Server High Availability (CSHA) provides the cross-AZ DR capability. When the CSHA service is required, you need to plan a production AZ and a DR AZ.
If you want to know more information about the AZ and region, please check the following document:
HUAWEI CLOUD Stack Product Documentation
https://support.huawei.com/hedex/hdx.do?docid=EDOC1100167414&id=EN-US_TOPIC_0248187490&lang=en
Hope this helps!
