The replication administrator can use the commands in this section to operate Capture for VM.
This section explains how to perform the following Capture for VM tasks:
Before starting the Capture program, make sure you complete the following post-installation tasks:
A Capture program ASNPARMS file is provided that contains default values that the Capture program uses. Changing this file modifies the defaults. If you need different values for a specific database, copy the file to the Capture program virtual machine's A-disk. The following default values are contained in the Capture program ASNPARMS:
By default, the messages are issued in American English (ASNLS001). To issue messages in a different language, change the LANGUAGE parameter in the ASNPARMS file. Supported languages include:
After it starts, the Capture program runs continuously until you stop it or it detects an error.
To start the Capture program:
Starting the Capture program
>>-ASNCCP---+--------+-+---------+-+--------+-+---------+------->
+-WARM---+ +-PRUNE---+ +-TERM---+ +-TRACE---+
+-COLD---+ +-NOPRUNE-+ +-NOTERM-+ +-NOTRACE-+
+-WARMNS-+
>--+------------------------------+----------------------------><
+-NOUSERID---------------------+
+-USERID=--auth_name/password--+
If conflicting invocation parameters are specified, Capture for VM uses the value of the last parameter specified. For example, if ASNCCP is started using the COLD TRACE NOTRACE parameter string, no informational event trace will be written (NOTRACE).
Table 18 defines the optional parameters.
Table 18. ASNCCP Command Parameter Definitions for VM
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STOPPING CAPTURE >>-STOP--------------------------------------------------------><
Use the STOP command to stop the Capture program gracefully and commit the log records that it processed up to that point.
STOP should be issued before:
If you stop the Capture program, it shuts itself down and issues an informational message. If it detects an error, the program shuts itself down after cleaning up the data in the affected tables (so that the data will not be used). Staging tables are pruned when it is appropriate. In the case of re-IPL or logoff, you must initiate a cold start because the warm start information could not be saved.
Capture for VM issues informational or error messages to the console.
Suspending the Capture program >>-SUSPEND-----------------------------------------------------><
Use the SUSPEND command to suspend the Capture program until you issue the RESUME command.
You can use this command to suspend the Capture program to improve performance for operational transactions during peak periods without destroying the Capture for VM program run environment.
Resuming the Capture program >>-RESUME------------------------------------------------------><
Use the RESUME command to resume the suspended Capture program.
You can use this command to resume the Capture program if you suspended it with the SUSPEND command.
Reinitializing the Capture program >>-REINIT------------------------------------------------------><
Use the REINIT command to reinitialize the Capture program.
Use the REINIT command to begin to capture changes from new source tables if you add a new replication source with the Control Center while the Capture program is running. This command ensures that the Capture program recognizes the new replication sources in the change data control table. To allow the new replication source to be visible to the Capture program, you must issue a REINIT command. The REINIT command tells the Capture program to obtain newly added replication sources from the change data control table (ASN.IBMSNAP_REGISTER).
REINIT also rereads the tuning parameters table (ASN.IBMSNAP_CCPARMS) for any changes made to the tuning parameters.
Attention: Do not use REINIT to reinitialize the Capture program after canceling a replication source or dropping a replication source table while the Capture program is running. Instead, stop the Capture program and use warm start.
Pruning the Capture program >>-PRUNE-------------------------------------------------------><
Use the PRUNE command to initiate the pruning of the change data (CD) and unit-of-work (UOW) tables, if you used the NOPRUNE invocation parameter on ASNCCP.
This command prunes tables once. During pruning, if you stop or suspend the Capture program, pruning does not resume after you enter the RESUME command. You must enter the PRUNE command again to resume pruning.
Getting the Log >>-GETLSEQ-----------------------------------------------------><
Use the GETLSEQ command to provide the timestamp and current log sequence number.
Use the GETLSEQ command to determine how far the Capture program has read the log.