[keycloak-user] running multiple instances without clustering

Hi, I understand that Keycloak supports clustering, but I am wondering if it is possible to run multiple instances of Keycloak using the same configuration database *without* using clustering, i.e. using the standalone <https://keycloak.gitbooks.io/documentation/server_installation/topics/ope... operating mode. It looks like the only difference between this and using the standalone clustered mode is that the caches will not be synchronized between the instances. I understand that it could cause some weird behaviour with user sessions (e.g. a user logs out on one instance but is still logged in on another, or vice versa). Would it cause any more serious problems (e.g. corrupt configuration database) or create security vulnerabilities? The use case is that my application bundles Keycloak and the application and Keycloak run on the same server. If the server goes down, another instance of the application on another server will take over, and that instance will redirect users to another keycloak instance running on that server. So I don't really need clustering, since normally only a single Keycloak instance will actually be used at a time and will only be used by a single application. Thanks, Sam