Locally redundant storage

Locally redundant storage (LRS) replicates three copies of your data within the same data center. 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, but it also makes sure that these three copies exist in different update domains and fault domains. More information about fault/update domains will be covered in Chapter 4, Understanding Azure Virtual Machines.

Drawbacks

The following points are the drawbacks for using LRS:

• 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

The following points are the advantages of using LRS:

• 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 that 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