Does this plugin work in a clustered environment?
Yes. When using the plugin in a clustered environment, the cache entries are stored at the highest LiteSpeed server level. So, if you are using LiteSpeed's own Web ADC, then the cache can be stored at the ADC level. If you are using a third party load balancer, then the cache entries will only be stored at the backend LiteSpeed nodes, and cache purges will not be synchronized across the nodes.
We do not recommend a third party load balancing solution, if you wish to take advantage of LiteSpeed Cache, and keep cache entries synced between nodes.
