Exam AZ-301 topic 17 question 20 discussion

Correct answer is B This is a repeated question: https://www.examtopics.com/exams/microsoft/az-301/view/101/

why it is not GRS?

B is NOT correct. All of you are forgetting that GRS does NOT initiate automatic failover (there’s a reason why GRS is cheaper than RA-GRS) The requirement clearly states to “ensure” application can access data. Which means data must be available all times. Given answer is correct.

B is correct

hey we're looking at this question again! remember what I said about which is less expensive? were you paying attention? RA-GRS or GRS is less expensive??? GRS IS LESS EXPENSIVE THAN RA-GRS

in case of GRS, you can not access data from other region until active region fails. I will go with RA-GRS

Geo-Redundant Storage (GRS) provides 16 9’s of durability over a year leveraging a primary and secondary region. Data is protected within an individual datacenter or in a single region. When there is a failure in the primary region, data is available in read-only mode in the secondary region. Read Access Geo-Redundant Storage (RA-GRS) replicates data to another data center in a secondary zone. Unlike GRS, where you only have access to the secondary region with failure in the first, RA-GRS provides secondary regional access regardless of whether the primary region has failed. I think its GRS since the costs will be comparitively lesser as RA-GRS has the additional capability of making data available regardless of failure

RA-GRS storage is required due to the statement, that data must be available via REST endpoints; This implies a "read anytime" option for the GRS storage, therefore, RA-GRS: https://blogs.msdn.microsoft.com/windowsazurestorage/2013/12/11/windows-azure-storage-redundancy-options-and-read-access-geo-redundant-storage/