Locally redundant storage

Locally redundant storage (LRS) replicates three copies of your data within the same data center you have your data in. The write requests you do with your storage are not committed until they are replicated to all three copies, which means it replicates synchronously. Not only this, it also makes sure that these three copies exist in different update domains and fault domains. You can revise the terms guide at the beginning of the chapter to understand what the update domain and the fault domain are.

Drawbacks:

• The least durable option, as it replicates only within the same data center
• Your data will be lost if a catastrophic event, such as a volcanic eruption or flood, affects the data center

Advantages:

• It is the cheapest type compared to the other types
• It is the fastest type of data replication, offering the highest throughput since it replicates within the same data center, mitigating the risk of data loss that would occur during data replication caused by a failure having occurred on the original data host
• It is the only available replication type that can be used with Premium Storage at the time of writing