Changes to the memcached.properties file on the primary web app are authoritative—all settings are passed to the other nodes in the cluster when they read from the database. However, changes to the cache.properties files must still be made on each node. Additionally, any child node with a cache.properties file configured with a cache.type value that does not match what has been previously applied to the database by the primary web app will be considered out of sync and fail to successfully initialize.