caching-dotnet-redis-invalidation

To invalidate local memory cache across multiple ASP.NET Core instances, you can use Redis pub/sub to automatically notify peer nodes to clear stale entries immediately after a write operation. This ensures cross-node cache consistency without manual sync logic.

Your multi-instance ASP.NET Core application serves stale memory cache data because each node maintains an independent local memory cache. Without a synchronization mechanism like Redis pub/sub, updated data is not reflected across the cluster.

No, you do not need to share your Redis distributed cache multiplexer. This cache invalidation approach uses a dedicated Redis instance specifically for pub/sub notifications, keeping it separate from your distributed cache groups.

The best way to automatically clear local memory cache on peer nodes in a distributed backend is implementing Redis pub/sub to broadcast invalidation messages. This provides low-overhead, automatic cache consistency across multi-instance applications.

Yes, you can use Redis pub/sub for cross-node cache invalidation without manual sync logic. The mechanism automatically notifies all peer application nodes to clear their local memory cache entries immediately after a write operation.