Application High Availability

High Availability can be inbuilt within the software used for applications or it can be built from ground-up within applications. One example of the High Availability feature provided by software is SQL server always on availability groups. They help in keeping databases highly available.

Azure Services also have an inbuilt High Availability mechanism. In Azure SQL, data is replicated synchronously within the region. Active geo-replication allows up to four additional database copies in the same region or different regions. Azure storage has its own mechanism to make data available by replicating to multiple data centers and regions.