- Learning Microsoft Azure Storage
- Mohamed Waly
- 172字
- 2021-07-02 15:26:06
Read-access geo-redundant storage
Read-access geo-redundant storage (RA-GRS) follows the same replication mechanism of GRS, in addition, to read access on your replicated data in the other regions.
Drawback: If a disaster occurs, some data might be lost, because the data replicates to the other region asynchronously.
Advantages:
- It provides the highest durability and availability, even if a disaster occurs in a whole region
- If a disaster occurs, you still only have read access to the storage, but no write access until Microsoft initiates failover to the secondary region
- The region with the read access can be used for data retrieval by the nearest offices to it without the need to go to another region to access the data; as a result, the data latency will decrease
Regarding replication between different regions, it will not work with just any two regions; the regions must be paired.
For example the West Europe region can replicate with North Europe, and not any other region.
For more information about paired regions, check the following article: https://docs.microsoft.com/en-us/azure/best-practices-availability-paired-regions.
For example the West Europe region can replicate with North Europe, and not any other region.
For more information about paired regions, check the following article: https://docs.microsoft.com/en-us/azure/best-practices-availability-paired-regions.