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DCMT VARY LU Parameters

broadcast-parms

Indicates to execute the DCMT command on all or a list of data sharing group members.

Note: For more information about broadcasting and broadcast-parms syntax, see the section How to Broadcast System Tasks.

LU

Specifies a logical unit to be varied. Either one or all modeents in the logical unit are varied, based on the MODEENT specification.

logical-unit-name

The name of the logical unit to be varied.

MODeent

Specifies a VTAM modeent to be varied in the logical unit.

If you do not specify MODeent, parameters in the VARY LU command are assigned to all modeents in the logical unit.

vtam-modeent-name

The name of the VTAM modeent to be varied.

MAXses

Establishes or changes the maximum number of parallel sessions that can be enabled for the specified modeent(s) or model of the logical unit.

If DC/UCF cannot satisfy the specified maximum, it enables as many sessions as possible and terminate without an error.

max-session-count

An integer in the range 1 through the number of physical terminals associated with the logical unit. Physical terminals are associated with logical units at system generation time by the PTERM statement.

The value for a remote logical unit type 6.2 is overridden at runtime when the value is unacceptable. The remote logical unit service manager negotiates the maximum session value.

MINWin

Establishes or changes the number of parallel sessions defined for contention winners in the specified logical unit modeent(s).

min-contention-winner-count

An integer in the range zero through the value of max-session-count.

If you specify zero for min-contention-winner-count, it has the same effect as specifying RESET.

The value for a remote logical unit type 6.2 is overridden at runtime when the value is unacceptable. The remote logical unit service manager negotiates the minimum contention winners value.

MINLos

Establishes or changes the number of parallel sessions defined for contention losers in the logical unit.

min-contention-loser-count

An integer in the range zero through the value of max-session-count.

The value for a remote logical unit type 6.2 is overridden at runtime when the value is unacceptable. The remote logical unit service manager negotiates the minimum contention losers value.

INITialize

Sets or resets the values for MAXSES, MINWIN, MINLOS, and SESSION to the values established at system generation time. System generation PTERM statements associated with a given logical unit determine the initial MAXSES, MINWIN, MINLOS and SESSION values:

• The initial MAXSES value is equal to the number of system generation PTERM statements associated with and enabled for a logical unit
• The initial MINWIN value is equal to the number of PTERM (enabled) statements that specify CONTENTION IS WIN for the logical unit
• The initial MINLOS value is equal to the number of PTERM (enabled) statements that specify CONTENTION IS LOSE for the logical unit
• The initial SESSION value, for a given model of a logical unit, is equal to the number of system generation PTERM statements associated with the logical unit, enabled and defined with the ACQUIRE option.

RESet

Requests that all sessions for the logical unit modeent(s) or model be put out of service. No new conversations are allowed; however, any conversation currently in progress across a session is allowed to complete normally before the session is put out of service.

Drain

Requests that sessions be put out of service only after there are no pending requests for the logical unit modeent(s).