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.

A is correct since cost is concern

For the keyword "is available for read workloads in a secondary region" B is the right choice

'Data must be available for read workloads in a secondary region', even is GRS is cheaper, no data read in secondary region unless manually initiated i.e. not useful for Read workload from secondary region.

read-access geo-zone-redundant storage (RA-GZRS)

Read-Access Geo-Redundant Storage (RA-GRS): Data is replicated to a secondary region, and read access is enabled in the secondary region. This means that if the primary region fails, the data can still be read from the secondary region

I was Team B up until the last sentence "the solution must minimize costs". To minimize costs and to ensure the data is available for read IF an outage occurs points to A. They never said anything about it being available at the same time. B goes against the minimizing of cost so A. Not the best questions in my opinion...leaves too much room for interpretation.

Understating the question very clearly that asking for an outage not failover, so I would say my answer to "B". Here is the reference to follow: Link: https://learn.microsoft.com/en-us/azure/storage/common/storage-redundancy#read-

Question is clearly mentioned that "read workloads in a secondary region if an outage occurs in the primary region + optimize cost" - where GRS solution is the best option compared to others.

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.

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