Microsoft Certified: Azure Developer Associate (AZ-204)Develop for Azure storageMedium
A company is developing a new application that will store user-generated content, including photos and videos. The application needs to ensure high availability and durability of the stored data, even in the event of a regional outage. It also requires the ability to read data from a secondary region to improve read performance for geographically dispersed users. Which Azure Blob Storage redundancy option best meets these requirements?
- ALocally Redundant Storage (LRS)
- BGeo-Redundant Storage (GRS)
- CZone-Redundant Storage (ZRS)
- DRead-Access Geo-Redundant Storage (RA-GRS)
Show answer & explanationAnswer & explanation
Correct answer: D. Read-Access Geo-Redundant Storage (RA-GRS)
RA-GRS provides geo-redundancy with read access to the secondary region, ensuring high availability, durability, and improved read performance for users in distant locations.
Why the other options are wrong
- A. LRS provides local redundancy within a single data center, which does not protect against regional outages.
- B. GRS provides geo-redundancy but does not allow read access to the secondary region, failing to meet the read performance requirement.
- C. ZRS provides redundancy across availability zones within a single region, which does not protect against regional outages.
RA-GRS
Read-Access Geo-Redundant Storage (RA-GRS) replicates data to a secondary region hundreds of miles away and provides read access to the data in the secondary region.
- Offers geo-redundancy for disaster recovery.
- Allows read access to the secondary endpoint.
- Provides the highest level of durability and availability.
Memory trick: Remember R.A.G.S. for Read-Access Geo-Redundant Storage, allowing reads from afar.