Is RA-GZRS storage accessible in the secondary region during the failover process

Question

Hi,

I know read only access to RA-GZRS storage is available in the secondary region before a failover & after a failover. Does this mean it's not available during failover i.e. when it's happening?

Thank you in advance for your help.

Answer 1

Hi,

Yes, the secondary is available during the failover process, however...

In one key aspect the secondary endpoint is not available after failover, so you should keep this in mind for your designs. Once the failover has completed, the -secondary endpoint doesn't exist. You only have the primary endpoints, which now point (via DNS) to what used to be the secondary.

For example, if you have an application programmed to read from the secondary it will have problems after a failover has completed unless you write it specifically to account for this.

-TP

Answer 2

@MO-64 Thanks for posting your query on Microsoft Q&A.

With RA-GZRS, read only access to data in secondary region will be available even during the failover.

If your applications require high availability, then you can configure your storage account for read access to the secondary region. When you enable read access to the secondary region, then your data is always available to be read from the secondary, including in a situation where the primary region becomes unavailable. Read-access geo-redundant storage (RA-GRS) or read-access geo-zone-redundant storage (RA-GZRS) configurations permit read access to the secondary region.

Reference document: https://learn.microsoft.com/en-us/azure/storage/common/storage-redundancy#read-access-to-data-in-the-secondary-region

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