You are developing a REST API service that provides data about products. The service will be hosted in an
Azure virtual machine (VM).
The product data must be stored in Azure tables and replicated to multiple geographic locations.
API calls that use the HTTP GET operation must continue to function when the data tables at the primary Azure
datacenter are not accessible.
You need to configure storage for the service.
Which type of replication should you choose?
A.
Locally Redundant Storage replication
B.
Geo-Redundant Storage replication
C.
Zone-Redundant Storage replication
D.
Read-Access Geo-Redundant Storage replication
Right.
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Keep these points in mind when deciding which replication option to use:
Zone-redundant storage (ZRS) provides highly availability with synchronous replication and may be a better choice for some scenarios than GRS or RA-GRS. For more information on ZRS, see ZRS.
Because asynchronous replication involves a delay, in the event of a regional disaster it is possible that changes that have not yet been replicated to the secondary region will be lost if the data cannot be recovered from the primary region.
With GRS, the replica is not available unless Microsoft initiates failover to the secondary region. If Microsoft does initiate a failover to the secondary region, you will have read and write access to that data after the failover has completed. For more information, please see Disaster Recovery Guidance.
If your application needs to read from the secondary region, enable RA-GRS.
https://docs.microsoft.com/en-us/azure/storage/common/storage-redundancy-grs
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