SHADOW_SITE_ID

   (Alpha and Integrity servers) This parameter allows a system
   manager to define a site value, which Volume Shadowing uses to
   determine the best device to perform reads, thereby improving
   performance.

   The system manager can now define the site value to be used
   for all shadow sets mounted on a system. This parameter is an
   arbitrary numeric value coordinated by the system manager of
   disaster tolerant clusters. Reads from devices that have site
   values matching the shadow set's site value are preferred over
   reads from devices with different site values. For detailed
   information, see the description of the $SET DEVICE/SITE in the
   VSI OpenVMS DCL Dictionary and VSI Volume Shadowing for OpenVMS.

   SHADOW_SITE_ID is a DYNAMIC parameter.