分布式

1. Why Redis Cluster is needed - Distributed system partitioning 2. What Redis Cluster is - Redis's distributed solution, solving the single-machine write-capacity limit of primary-replica replication and the lack of automatic failover 3. How to build a Redis Cluster

1. Why Redis Sentinel is needed - Primary-replica replication cannot perform automatic failover 2. What Redis Sentinel is - Redis's high-availability mechanism, solving the lack of automatic failover in primary-replica replication 2.1. Redis Sentinel functions - Monitoring, Notification, Automatic failover, Configuration provider

1. Why Redis Replication is needed - Distributed system replication 2. What Redis Replication is - Copy data into multiple replicas and deploy them on other machines - Replication is the foundation of Redis high availability (Redis Cluster/Redis Sentinel) 2.1. Replication topology