Exam DP-200 topic 7 question 2 discussion

We do not have to read data from the secondary region : only GRS is needed (with smallest cost than RA-GRS)

RA-GRS is the correct answer. In case of failure you can read the data and minimize impact on the application. With GRS that won't be possible. Cost is not important in exams. Go with the best available assuming there is not constraint set in the question itself.

Replication Type= GRS

Geo-redundant storage (with GRS or GZRS) replicates your data to another physical location in the secondary region to protect against regional outages. However, that data is available to be read only if the customer or Microsoft initiates a failover from the primary to secondary region. When you enable read access to the secondary region, your data is available to be read at all times, including in a situation where the primary region becomes unavailable.

RA-GRS is the correct answer. It is mentioned in the question that "All services and processes must be resilient to a regional Azure outage." However, referred from the Microsoft docs: Geo-redundant storage carries a risk of data loss. Data is copied to the secondary region asynchronously, meaning there is a delay between when data written to the primary region is written to the secondary region. In the event of an outage, write operations to the primary endpoint that have not yet been copied to the secondary endpoint will be lost. This concludes that RA-GRS is the correct answer as per Microsoft docs "If an outage occurs in the primary endpoint, applications configured for read access to the secondary and designed for high availability can continue to read from the secondary endpoint. Microsoft recommends RA-GZRS for maximum availability and durability for your applications."

"Microsoft recommends RA-GZRS for maximum availability and durability for your applications."

acording to the doc here (https://docs.microsoft.com/en-us/azure/storage/common/storage-disaster-recovery-guidance) GRS has a manual failover step. so the RA-GRS would be the correct answer Geo-redundant storage (GRS) or geo-zone-redundant storage (GZRS) copies your data asynchronously in two geographic regions that are at least hundreds of miles apart. If the primary region suffers an outage, then the secondary region serves as a redundant source for your data. You can initiate a failover to transform the secondary endpoint into the primary endpoint. Read-access geo-redundant storage (RA-GRS) or read-access geo-zone-redundant storage (RA-GZRS) provides geo-redundant storage with the additional benefit of read access to the secondary endpoint. If an outage occurs in the primary endpoint, applications configured for read access to the secondary and designed for high availability can continue to read from the secondary endpoint. Microsoft recommends RA-GZRS for maximum availability and durability for your applications.

Dear Sambit, I guess that i not correct. GRS supports automatic fail over. Also, there is no requirement mentioned in the question that without failover also, READ access required. So my guess is GRS is the right answer.

RA-GRS is correct because it is the only that does migrations automatically

I agree with you STH.