Changing DDF parameters

Select the Change DDF parameters option from the Operational Assist Menu to display the Change DDF Parameters panel, which allows you to dynamically change the DDF parameters. You can also use the DDF command. The current DDF values from the BSDS record are displayed when the panel is initially displayed.

Change DDF Parameters panel

DDTAODD D Change DDF Parameters
Command ===> ___________________________ ______________________________________

Type the new DDF parameters that you wish to change. Then press Enter. The name and password parameters must conform to member name standards (1st character must be an alpha or national character, the rest must be alphanumeric and/or national).

DDF Parameters
Site location name . . . . DEDN
Luname for site to use . . . DEDNLU
Password for luname . . . . -NONE- (specify "-NONE-" for no password)
Generic LU Name. . . . . . . -NONE- (specify "-NONE-" for no generic
 luname support)
Idle thread status . . . . . ACTIVE (ACTIVE or INACTIVE)
TCP/IP PORT Number . . . . . 5125 (0-65534)
TCP/IP RESPORT Number . . . 5126 (0-65534)
TCP/IP SECPORT Number . . . _____ (0-65534)

Although the DDF BSDS record is updated immediately, the changes do not take effect until the next time that DDF is started.

To change DDF parameters from the OPERTUNE menus

  1. Select the Change DDF parameters option from the Operational Assist Menu to display the Change DDF Parameters panel.

    The current DDF values from the BSDS record are displayed on the Change DDF Parameters panel.

  2. Change the information on the panel as necessary. The following table describes the fields on the Change DDF Parameters panel.

    Field

    Description

    Site location name

    The name that is used by other Db2 subsystems to refer to the current Db2 subsystem

    Luname for site to use

    The VTAM logical unit (LU) name that this Db2 subsystem uses to communicate with other Db2 subsystems

    Password for luname

    The password that VTAM uses to recognize that the Db2 subsystem is authorized to use the LU name.

    Specifying -NONE- indicates that no password is to be used.

    Generic LU Name

    The logical unit name that is used with VTAM generic resource support to enable one LU name to be used for a data sharing group.

    Specifying -NONE- indicates that no generic name is to be used.

    Idle thread status

    The status of database access threads after a successful commit or rollback. If no database locks or cursors are held, a database access thread can be made inactive, which eliminates the overhead of repeated connections. Specify one of the following values:

    • ACTIVE—keeps the database access threads active and under the Max Remote Active limit
    • INACTIVE—lets the database access threads become inactive and fall within the Max Remote Concurrent limit

    TCP/IP PORT Number

    The port that is used by DDF to accept incoming DRDA connection requests. Specify a numerical value in the range 0–65534. A value of 0 indicates that TCP/IP support is deactivated.

    TCP/IP RESPORT Number

    The port that is used by DDF to accept incoming DRDA 2-phase commit resynchronization requests. Specify a numerical value in the range 0–65534. A value of 0 indicates that TCP/IP support is deactivated.

    TCP/IP SECPORT Number

    The port that is used by DDF to accept incoming secure DRDA connection requests. Specify a numerical value in the range 0–65534. A value of 0 indicates that secure DDF connection support for TCP/IP is decativated.

    Important

    This value applies only to Db2 version 9 and later releases.

  3. Press Enter.
  4. Issue the command from the Command Confirmation panel by typing 1 in the selection field and pressing Enter. To cancel the command, type 2 in the selection field and press Enter.

To change DDF parameters using the DDF command

The syntax for the DDF command is as follows:

IN(<DB2ssid@opertuneID>) DDF

Command syntax and parameters

image2018-12-26_16-44-19.png

Value

Description

DB2ssid

Db2 subsystem ID or the name of the Db2 data sharing group to which the command applies.

opertuneID

OPERTUNE system profile name (if OPERTUNE is running as a started task) or the batch job name (if OPERTUNE is running as a batch job).

location

The name that is used by other Db2 subsystems to refer to the current Db2 subsystem

luName

Db2 subsystem uses to communicate with other Db2 subsystems

password
-NONE

The password that VTAM uses to recognize that the Db2 subsystem is authorized to use the LU name.

port

The port that is used by DDF to accept incoming DRDA connection requests. Specify a numerical value in the range 0–65534. A value of 0 indicates that TCP/IP support is deactivated.

resyncPort

The port that is used by DDF to accept incoming DRDA 2-phase commit resynchronization requests. Specify a numerical value in the range 0–65534. A value of 0 indicates that TCP/IP support is deactivated.

VTAMgenLUname
-NONE

The logical unit name that is used with VTAM generic resource support to enable one LU name to be used for a data sharing group.

Specifying -NONE- indicates that no generic name is to be used.

ACTIVE
INACTIVE

The status of database access threads after a successful commit or rollback. If no database locks or cursors are held, a database access thread can be made inactive, which eliminates the overhead of repeated connections.

Specify one of the following values:

  • ACTIVE—keeps the database access threads active and under the Max Remote Active limit
  • INACTIVE—lets the database access threads become inactive and fall within the Max Remote Concurrent limit

securePort

The port that is used by DDF to accept incoming secure DRDA connection requests. Specify a numerical value in the range 0–65534. A value of 0 indicates that secure DDF connection support for TCP/IP is deactivated.

Important

This value applies only to Db2 version 9 and later releases.

Related topic

Overview-of-operational-assists

 

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