I do have three instances of Grails app running in three different tomcat servers, sharing same DB (Oracle). I've enabled some of my domain classes with cache : true.
How can I sync all of my server cache while updating DB via one server.
How can I sync all of my server cache while updating DB via one server.
You would need a shared distributed cache. Ehcache would be one option (https://grails-plugins.github.io/grails-cache-ehcache/).