1    /ALL

    Applies the specified operation to all CPUs in the active set.

2    /ASSIGN

       /ASSIGN [=option] (Alpha/Integrity servers only)

    Assigns the CPU to the current instance if no option is
    specified.

    If an option is specified, the CPU is assigned to that resource.

    Option          Description

    $$PARTITION     The current soft partition of the OpenVMS
                    instance.

    $$HARD_         The hard partition of the OpenVMS instance.
    PARTITION

    Supported only on AlphaServer systems that support partitioning.

3    /AUTO_START

       /AUTO_START (Alpha/Integrity servers only)
       /NOAUTO_START

    Sets or clears the instance-specific autostart flag for the
    specified CPUs.

    When autostart is enabled, that CPU will join the OpenVMS active
    set when it is assigned or migrated into the partition. The CPU
    will also autostart if a power-up transition is completed while
    the CPU is owned by the issuing instance.

    Supported only on AlphaServer systems that support partitioning.

4    /CAPABILITY

       /CAPABILITY
       /NOCAPABILITY

    Allows bits in the process user capability mask to be set or
    cleared individually, in groups, or all at once.

                                   NOTE

       The SET CPU/[NO]CAPABILITY command will fail if there is
       an active process that requires a capability that is not
       available on any remaining active CPU.

    Specifying the /CAPABILITY qualifier has no direct effect, but
    merely indicates the target of the operations specified by the
    following secondary qualifiers:

    /SET=(n[,..Sets all user capabilities defined by the position
               values n, where n has the range of 1 to 16.
    /CLEAR=(n[,Clears all user capabilities defined by the position
               values n, where n has the range of 1 to 16.

    The secondary qualifiers can all be used at once as long as the
    user capability bits defined in the /SET and /CLEAR parameters do
    not overlap.

    The /NOCAPABILITY qualifier clears all user capability bits.

5    /CLEAR

       /CLEAR=(n[,...])

    Clears all user capabilities defined by the position values n
    specified by the /CAPABILITY qualifier.

6    /FAILOVER

       /FAILOVER=option (Alpha/Integrity servers only)
       /NOFAILOVER

    Establishes instance-specific failover relationships for each CPU
    in the instance's potential set.

    When the instance crashes, CPUs with a failover target other than
    the current instance will be assigned or migrated to that target.

    Specifying the /FAILOVER qualifier has no direct effect; however,
    it indicates the target of the operations specified by the
    following options:

    Option          Description

    instance_name   The name of any valid running instance in the
                    current hard partition.

    partitionID     The numeric ID of any partition (reflected in
                    the configuration tree) in the current hard
                    partition. An operating system instance is not
                    required to be running with this identifier.

    $$PARTITION     Assigns a resource to the current partition of
                    the current instance.

    $$HARD_         Assigns a resource to the hard partition node
    PARTITION       of the configuration tree. This makes the CPU
                    available to multiple soft partitions below it.

    The /FAILOVER qualifier generates a resource assignment only when
    the current instance crashes.

    Supported only on AlphaServer systems that support partitioning.
    99

7    /GLOBAL

    Modifies the global cell SCH$GL_DEFAULT_CPU_CAP. This global cell
    is used to initialize the user capability mask of CPUs that are
    brought into the active set for the first time.

8    /MIGRATE

       /MIGRATE=option (Alpha/Integrity servers only)

    Transfers ownership of the CPU from the current instance to
    another soft partition.

    Option          Description

    instance_name   The name of any valid running instance in the
                    current hard partition.

    partitionID     The numeric ID of any partition (reflected in
                    the configuration tree) in the current hard
                    partition. An operating system instance is not
                    required to be running with this identifier.

    Supported only on AlphaServer systems that support partitioning.

9    /POWER

       /POWER=option (Alpha/Integrity servers only)

    Turns the power on or off in one or more CPU slots. Valid options
    are ON and OFF.

    Supported only on AlphaServer GS series systems.

10    /OVERRIDE_CHECKS

       /OVERRIDE_CHECKS (Alpha/Integrity servers only)

    Directs the SET/CPU command to bypass a series of checks that
    determine whether the specified processor is eligible for removal
    from the active set.

11    /REFRESH

       /REFRESH (Alpha/Integrity servers only)

    Examines and updates the OpenVMS context for the specified CPU or
    CPUs, using the hardware configuration tree.

12    /SET

       /SET=(n[,...])

    Sets all user capabilities defined by the position values n
    specified by the /CAPABILITY qualifier.

13    /START

       /START (Alpha/Integrity servers only)

    Initiates a request for the specified CPU to join the OpenVMS
    active set if it is not already there.