The static system parameter VCC_FLAGS enables and disables file system data caching. If caching is enabled, VCC_FLAGS controls which file system data cache is loaded during system startup. Value Description 0 Disables file system data caching on the local node and throughout the OpenVMS Cluster. In an OpenVMS Cluster, if caching is disabled on any node, none of the other nodes can use the extended file cache or the virtual I/O cache. They cannot cache any file data until that node either leaves the cluster or reboots with VCC_FLAGS set to a nonzero value. 1 Enables file system data caching and selects the Virtual I/O Cache. This value is relevant only for Alpha systems. 2 Enables file system data caching and selects the extended file cache. NOTE On x86 and Integrity servers, the volume caching product ([SYS$LDR]SYS$VCC.EXE) is not available. XFC caching is the default caching mechanism. Setting the VCC_FLAGS parameter to 1 is equivalent to not loading caching at all or to setting VCC_FLAGS to 0. VCC_FLAGS is an AUTOGEN parameter.