I think im getting a little closer to understanding this. So the metadata (file atributes AFR settings ect) is stored as a header on the actual file and the central name space cache stores information to do with file lookup, node its stored on ect. Does this sound correct? If this is the case is it possible to update this namespace info as the file is accessed or will that be dificult as they are currently concidered static. i can see this as a potential issue where the local and central caches may have consistancy issues. Would this problem be lessened any by distributing the namespace cache? (im assuming a DHT type solution) Would this just mean that consistancy problems would occur in the instance of a node failure? Thanks Luke McGregor