(Unit 2 of 5) Azure storage redundancy

Question 1

Name the factors that may help you decidewhich redundancy option you shoud choose.

Answer 1

1. **How your data is replicated **in the primary region.
2. Whether your data is replicated to a second region that is geographically distant to the primary region.
3. Whether your application requires read access to the replicated data in the secondary region

Question 2

How many times is data replicated in the PRIMARY region?

Answer 2

Three times in the primary region.

Question 3

Name the 2 methods used for replicating data in the PRIMARY region

Answer 3

locally redundant storage (LRS) and zone-redundant storage (ZRS)

Question 4

Draw a diagram and explain the 1st type of data replication in the PRIMARY region.

Answer 4

https://learn.microsoft.com/en-us/training/wwl-azure/describe-azure-storage-services/media/locally-redundant-storage-37247957.png

1. Data replicated 3 times in 1 data center
2. Lowest cost option
3. Least durabillity

Question 5

Describe the 2nd type of data replication in the PRIMARY region.

Answer 5

https://learn.microsoft.com/en-us/training/wwl-azure/describe-azure-storage-services/media/locally-redundant-storage-37247957.png

1. Data replicated 3 times synchronously, 1 time per data center
2. Read an write access even when another zone is unavailable

Question 6

Describe the 1st type of data replication in the SECONDARY region

Answer 6

Geo-redundant storage:
1. LRS in the 1st and then LRS again in the 2nd region

https://learn.microsoft.com/en-us/training/wwl-azure/describe-azure-storage-services/media/geo-redundant-storage-3432d558.png

Question 7

Describe the 2nd type of data replication in the SECONDARY region

Answer 7

Geo-zone-redundant storage:
1. ZRS in the first region, LRS in the 2nd
2. Most reliable replication type

Question 8

Name the 2 SUB-types of replication in the SECOND region

Answer 8

1. Read-access geo-redundant storage (RA-GRS)
2. Read-access geo-zone-redundant storage (RA-GZRS).

Question 9

Name the 2 SUB-types of replication in the SECOND region

Answer 9

1. Read-access geo-redundant storage (RA-GRS)
2. Read-access geo-zone-redundant storage (RA-GZRS).

Question 10

What are the functions of the SUB types of the 2nd region replication?

Answer 10

If you enable read access to the secondary region, your data is always available