Exam AZ-304 topic 5 question 24 discussion

Question asking "Ensure that the users receive files from the same region as the web app that they access." Correct answer B. read-access geo-redundant storage (RA-GRS)

With GRS you don't get to read the other region unless you initiate failover. So RA-GRS.

I would probably chose D mainly because the requirements here are: 1. Minimize COST 2. File within the same region as the webApp #There is nothing mention of AVAILABILITY - meaning I don't necessarily need to pick a solution based on "will it it be available if one region fail". So comparing GRS and RA-GRS to reduce the cost - I would pick GRS.

The difference between GRS and RA GRS is fairly simple, GRS only allows to be read in the secondary zone in the even of a failover from the primary to secondary while RA GRS allows the option to read in the secondary whenever. refer below, https://www.reply.com/solidsoft-reply/en/content/which-microsoft-azure-replication-service-should-you-use#:~:text=The%20difference%20between%20GRS%20and,read%20in%20the%20secondary%20whenever.

1. You upload a file to blob RA-GRS storage once 2. File is available in second zone Azure File Sync works only with File shared storage. GRS blob files will not be available until a failover is triggered. Answer B is correct

RAGRS ans please someone vote A to add it the rainbow

RA-GRS and GRS are fail-over copies only. It's not to us in runtime explicitly. To provide data close to users in the region you need CDN. AzureFiles is correct.

(RA-GRS)

The answer is D) GRS because it is cheaper than B) RA-GRS and there is no other requirement. The user location is not specified nor which web app each accesses. Only the location of the web app is specified. Each region has a web app, and each web app will have a storage account in the same region as the web app. GRS is the cheapest storage account option shown. :)

Appere on exam 23-dec-2021

A. Distributed File System (DFS) The Distributed File System (DFS) functions provide the ability to logically group shares on multiple servers and to transparently link shares into a single hierarchical namespace. C. Azure File Sync Azure File Sync transforms Windows Server into a quick cache of your Azure file share. D. geo-redundant storage (GRS) The data in the secondary region isn't available for read or write access unless there is a failover to the secondary region. B is correct

B is correct. A and C is ruled out because Azure blob storage is used. now we need to choose between GRS and RA-GRS. some facts. 1. east US and west US are paired region https://docs.microsoft.com/en-us/azure/best-practices-availability-paired-regions#what-are-paired-regions 2. RA-GRS supports the direct read from the second region. therefore, we only need to upload the big file to primary region once. Then it will be available in the secondary region. Now it is easy to reach the answer "RA-GRS" https://docs.microsoft.com/en-us/azure/storage/common/storage-redundancy#read-access-to-data-in-the-secondary-region

The question clearly mentions that the webapp has to read from the same region where it exists. GRS and RA-GRS does not support this for the reasons is a DR approach. Azure File Sync is the way to go

answer : B Please notice The web app uses Azure Blob storage so its cannot be DFS or Azure Files

the files only need to be uploaded once, so I choose B

Uploading files just once seam to me that some replication should be in place. Reading or downloading from a region closer to the user means to me that some sort of CDN should be involved. So none of the answer makes sense or perhaps the RAGRS makes a bit of sense but not as a complete solution

I don't think that B is the correct answer. Yes you can read in same time from the secondary region - but - you can't choose the secondary region. So how would one ensure that data are served from both East and West regions within the single Storage Account? Probably File Sync is the proper one.