Exam DP-203 topic 1 question 17 discussion

B is right 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.

In my opinion, I believe the and answer is A, and this is why. In the question they state "...available for read workloads in a secondary region IF AN OUTAGE OCCURES in the primary...". Well, answer B (RA-GRS) states in Microsoft documentation that RA-GRS is for when "...your data is available to be read AT ALL TIMES, including in a situation where the primary region becomes unavailable." To me, the nature of the question is what is the cheapest solution which allows for failover to read workload, when there is an outage. Answer (A). Common sense would be 'A' too because that is probably the most often real-life use case.

Question has asked about "read workloads in a secondary region" - Hence answer would be B

Pour assurer la disponibilité des données dans une région secondaire en cas de panne dans la région principale tout en minimisant les coûts, vous devriez utiliser le stockage géo-redondant à accès en lecture (RA-GRS) (Option B). Voici pourquoi : RA-GRS réplique vos données de manière asynchrone vers une région secondaire géographiquement éloignée, offrant ainsi une protection contre les pannes régionales1. En cas de panne dans la région principale, RA-GRS permet un accès en lecture aux données répliquées dans la région secondaire, ce qui assure la continuité des charges de travail de lecture1. Cette option équilibre bien la disponibilité et les coûts, car elle offre une haute disponibilité pour les lectures sans les coûts plus élevés associés à d'autres options de redondance.

RA-GRS offers the benefits of geo-redundant storage with additional read access to the secondary region. This means your data will be available for reading in a secondary region if the primary region goes down, ensuring high availability at a relatively low cost.

Correct Answer: A

While it is true that the customer/Microsoft has to initiate the failover, this is not elaborated in any sense in the question. What is the point of GRS if you cannot read from it after a failover? It provides the service needed, at the lowest cost. This would be different if there were keywords like "available immediately without downtime" or "automatically" but there are none, so well, if a region fails, you fail over, and read from secondary region. Bottom line: A. GRS

In this scenario, the data in the secondary region only needs to be available IF the data isn't available in the primary region. Both GRS and RA-GRS accomplish that. The difference between GRS and RA-GRS is that the data in RA-GRS is always readable, even if the primary region is up, which also makes it more expensive. That is not necessary in this case, so GRS is the answer. Source: https://learn.microsoft.com/en-us/azure/storage/common/storage-redundancy

The correct answer is: B. read-access geo-redundant storage (RA-GRS) With RA-GRS, your data is not only replicated to a secondary region (geo-redundant storage, GRS) but also allows read access to the data in the secondary region. This means that if there is an outage in the primary region, you can access and read the data from the secondary region, providing business continuity and reducing downtime. While geo-redundant storage (GRS) on its own provides data redundancy across regions, it only allows read and write access in the primary region. To meet the requirement of having read access in the secondary region during an outage, RA-GRS is the appropriate option. Zone-redundant storage (ZRS) and locally-redundant storage (LRS) do not provide the capability of data redundancy across regions, so they are not suitable for ensuring read access in a secondary region during a primary region outage.

B. read-access geo-redundant storage (RA-GRS) Most When configured to use globally redundant storage (GRS, GZRS, and RA-GZRS), Azure copies your data asynchronously to a secondary geographic region located hundreds of miles away. This level of redundancy allows you to recover your data if there's an outage throughout the entire primary region. Read-access geo-redundant storage (RA-GRS) and read-access geo-zone-redundant storage (RA-GZRS) also provide geo-redundant storage, but offer the added benefit of read access to the secondary endpoint. These options are ideal for applications designed for high availability business-critical applications. If the primary endpoint experiences an outage, applications configured for read access to the secondary region can continue to operate. Microsoft recommends RA-GZRS for maximum availability and durability of your storage accounts. https://learn.microsoft.com/en-us/azure/storage/common/storage-disaster-recovery-guidance

A is the correct answer - question clearly says 'if an outage' - then A - GRS, if it had said Secondary region should be always available for read then RA-GRS

ChatGPT 4o To ensure that the data in your Azure Data Lake Storage Gen2 container is available for read workloads in a secondary region in case of an outage in the primary region, while also minimizing costs, you should use Read-Access Geo-Redundant Storage (RA-GRS).

while GRS focuses solely on disaster recovery, RA-GRS extends this by allowing read access to secondary data https://learn.microsoft.com/en-us/azure/storage/common/storage-redundancy

B. read-access geo-redundant storage (RA-GRS) If you want to have read-access to the storage in another area, you must choose RA-GZRS since otherwise you'll have not the second storage URL. Impossible to choose the cheapest option in this case.

It is clearly B. That's Azure Infrastructure 1.01. With GRS you cannot Read only failover

Minimize costs is a

Doc clearly states that With an account configured for GRS or GZRS, data in the secondary region is not directly accessible to users or applications, unless a failover occurs. The failover process updates the DNS entry provided by Azure Storage so that the secondary endpoint becomes the new primary endpoint for your storage account. During the failover process, your data is inaccessible