CDC Guide for z/OS

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Datacom Table-Based ECCR Parameters

Configure parameters for the Datacom table-based ECCR in the RUNLIB(ECCRDCMP) member to which the DTLCACFG DD statement in the ECCR JCL points.

Based on your input during installation, the

z/OS

Installation Assistant adds values for some parameters to the ECCRDCMP member. You can change these values if necessary.

The ECCRDCMP member can contain the following parameters:

MUF=muf_name
[REG_MUF=registered_muf_name]
[NO_DATA_WAIT=seconds]
[NO_DATA_WAIT2=seconds]
ECCRNAME=eccr_name
DB_TYPE=DCM
[COLDSTART={Y|N}]
[CLEANUP={Y|N}]
[CLEANUP_INTERVAL=seconds]
[CDC_BASE=dbid]
[CDC_ID=A]
[CAPT_STATS={Y|N}]
[CAPT_STATS_INTVL=minutes]
[CAPT_STATS_TERSE={Y|N}]
[CLEANUP_STATISTICS={Y|N}]
[LOCAL_TIME={Y|N}]
[MONITOR={Y|N}]
[MONITOR_INTERVAL=seconds]
[ON_SUSPENSION_ERROR_CONTINUE={N|Y}]
[REFRESH_ALLOWED={Y|N}]
[RESTART_ADVANCE_ACTIVE=number_of_records]

The following table summarizes the Datacom table-based ECCR parameters:

Parameter	Required or Optional	Description
MUF	Required	The name of the Datacom MUF for which change data is captured. This parameter is customized by the z/OS Installation Assistant.
REG_MUF	Optional	The Datacom MUF name that is defined in the registration group for the Datacom source. Use this parameter if you want to use the capture registrations defined for a MUF other than the one specified in the MUF parameter. This parameter can be customized by the z/OS Installation Assistant.
NO_DATA_WAIT	Optional	The number of seconds that the ECCR waits after reading the Datacom CDC tables and finding no new change records before starting the next read operation. If the ECCR completes the next read operation without having read new changes, the NO_DATA_WAIT2 parameter takes effect. This parameter can be customized by the z/OS Installation Assistant.
NO_DATA_WAIT2	Optional	After the NO_DATA_WAIT interval is no longer in effect, the number of seconds that the Datacom table-based ECCR waits after reading the Datacom CDC tables and finding no new change records before trying the read again. The NO_DATA_WAIT2 wait and retry cycle remains in effect as long as no changes are received. This parameter can be customized by the z/OS Installation Assistant.
ECCRNAME	Required	The ECCR name.
DB_TYPE	Required	The database type, which must be DCM for Datacom.
COLDSTART	Optional	Controls whether the ECCR cold starts or warm starts.
CLEANUP	Optional	Controls whether the PowerExchange cleanup subtask periodically removes changes that were committed to the PowerExchange Logger from the Datacom CDC tables. This parameter can be customized by the z/OS Installation Assistant.
CLEANUP_INTERVAL	Optional	The number of seconds that the cleanup subtask waits before removing committed changes from the Datacom CDC tables. This parameter can be customized by the MVS Installation Assistant.
CDC_BASE	Optional	The database identifier (DBID) for the source database. This parameter can be customized by the z/OS Installation Assistant.
CDC_ID	Optional	The version identifier of the Datacom CDC tables.
CAPT_STATS	Optional	Controls whether PowerExchange writes ECCR statistics messages to the DTLLOG and DTLOUT data sets and WTO messages to the system operator console when the Datacom table-based ECCR reaches the end of the change stream in the Datacom CDC tables.
CAPT_STATS_INTVL	Optional	The interval, in minutes, for which the Datacom table-based ECCR collects and reports the number of inserts, deletes, updates, and commits that were captured from the change stream. The ECCR also reports the current point in the change stream.
CAPT_STATS_TERSE	Optional	Controls whether the Datacom table-based ECCR prints PWX-06153 statistics messages only for registered sources for which the ECCR captured changes.
CLEANUP_STATISTICS	Optional	Controls whether the PowerExchange cleanup subtask issues detailed messages with statistics that help you determine the progress of the cleanup process relative to the main CDC reader process.
LOCAL_TIME	Optional	Controls whether the time stamps that the ECCR assigns to change records use the local time instead of the Coordinated Universal Time (UTC) time that Datacom uses.
MONITOR	Optional	Controls whether the ECCR starts another process to monitor and detect a hang in the CA Datacom API in the main ECCR reader process or in the ECCR cleanup process. Also, if cleanup is active, the monitor process detects any hang that might occur in the ECCR cleanup wait routine.
MONITOR_INTERVAL	Optional	If you set MONITOR to Y, the number of seconds between each monitoring check.
ON_SUSPENSION_ERROR_CONTINUE	Optional	If you use the PWXUCREG utility to suspend and reactivate capture registrations, controls whether the ECCR ends or continues when a UOW that contains change records to be discarded or captured started at an invalid point in the change stream relative to the suspension window.
REFRESH_ALLOWED	Optional	Controls whether you can use the REFRESH command after adding or deleting capture registrations or after suspending or reactivating capture registrations with the PWXUCREG utilty. The REFRESH command refreshes the list of registered Datacom records that the ECCR uses for change capture processing.
RESTART_ADVANCE_ACTIVE	Optional	The number of change records that an active Datacom ECCR processes after a special restart UOW before writing another updated special UOW to the PowerExchange Logger.

If a parameter has a default value, it is marked as optional. A default value is the value that PowerExchange uses if the parameter is not defined. For some parameters, the

z/OS

Installation Assistant provides recommended values, which you can accept or change.

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CDC Guide for z/OS

CDC Guide for z/OS

Datacom Table-Based ECCR Parameters

Datacom Table-Based ECCR Parameters