High availability in Redis Enterprise can be achieved by setting up replication, auto-failover, and data persistence features. Let's look at each of these elements.
Replication involves creating multiple copies of your data across different nodes or clusters. In Redis Enterprise, you can set up a master-replica configuration where the replica continuously updates itself to match the data on the master node.
Auto-failover mechanism reduces downtime by automatically switching to a replica if the master node fails. The Redis Sentinel subsystem handles this process in Redis Enterprise.
No explicit code is required as the auto-failover mechanism is configured through the Redis Enterprise dashboard.
Data persistence involves storing data in a non-volatile location so that it can survive server restarts or crashes. Redis Enterprise supports two types of data persistence: RDB (Redis DataBase file) and AOF (Append Only File).
You can configure RDB and AOF persistence from the Redis Enterprise dashboard or using the 'CONFIG SET' command.
Remember, achieving high availability requires careful planning and consideration of your specific application and infrastructure requirements.