Azure Storage offers six different levels of replication, which should be considered when both architecting and maintaining a solution. You can often start with local replication called Locally Redundant Storage (LRS) and switch for the geo-paired region with Geographically Redundant Storage (GRS) or RA-GRS (read-only) models. If you seek the highest level of consistency and durability, you should consider the GZRS/RA-GZRS models, which are Zone Redundant Storage (ZRS) models in geo-paired regions. In this section, we will discuss how to switch the replication model and what the possible issues when performing such an operation are.
Basically, we can divide the replication models into two main categories:
- Local replication: LRS and ZRS
- Global replication: GRS, RA-GRS, GZRS, and RA-GZRS
The number of replicas can be presented as follows:
- Three local replicas: LRS and ZRS
- Three local replicas and three replicas...