Specifies to execute the DCMT command on all or a list of data sharing group members.
Note: For more information about broadcasting and broadcast-parms,
see the section How to Broadcast System Tasks.
Adds new SYSTRK files to the list of mirrors and terminates use of older or non-existent mirrors. New SYSTRK files are made active before terminating the use of other SYSTRK files. In the process of becoming active mirrors, the contents of new files are brought up-to-date if necessary. Terminated files are deleted if the current delete option is ON. After a successful refresh, the status of change tracking is active.
If change tracking is active, this option has no effect. If change tracking is inactive or disabled, this option activates change tracking and enables the execution of DCMT commands that update information in SYSTRK. An automatic refresh is done as part of activation. Any files with out-of-date contents are brought up-to-date as part of the process of becoming active. The contents of all SYSTRK files are refreshed if change tracking was previously disabled. At least one SYSTRK file must exist and achieve active mirror status before certain DCMT commands can be executed.
Note: For a list of impacted commands, see DCMT Commands that Require Active Change Tracking.
Deactivates change tracking and prevents the execution of certain DCMT commands. All SYSTRK files are closed and deallocated except those that have encountered an I/O error.
Disables change tracking but does not prevent the execution of certain DCMT commands. Disabling change tracking should only be used in an emergency situation because the inability to record changes in the SYSTRK files may lead to incorrect recovery during warmstart and incorrect area statuses on system restarts.
Specifies the target number of files to be maintained as active mirrors. file-cnt must be an integer in the range 2 through 4. To affect the number of files actually in use while change tracking is active, issue a DCMT VARY CHANGE TRACKING REFRESH command.
Specifies whether the DC/UCF system automatically deletes obsolete SYSTRK files.
(z/OS and z/VM systems only) Enables automatic file deletion.
Disables automatic file deletion.
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