VCC_FLAGS

   (Alpha only) 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 can't 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 is the default for VAX systems.

   2      Enables file system data caching and selects the extended
          file cache. This is the default for Alpha systems.

                                  NOTE

      On 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.