Technical Management Redis Cache section allows users (developer) to manage cache or CDN.

Using a centralized Redis server with multiple instances to serve cache data to several WordPress sites on different machines is a valid and commonly used architecture, especially in professional and cloud environments.

In this setup, data is still stored in RAM, so it remains much faster than disk-based caching. However, because Redis is accessed over the network, each request introduces network latency. If the Redis server and the WordPress servers are in the same datacenter or private network, this latency is usually very low and Redis remains significantly faster than any filesystem-based cache. If Redis is accessed over the public internet, performance can degrade and partially reduce its advantages.

Centralizing Redis provides clear benefits: shared cache across servers, better cache consistency, easier scaling of WordPress nodes, and simplified cache management. On the other hand, it introduces new considerations such as network dependency, potential single point of failure, and resource contention if too many Redis instances run on the same machine.