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Setting the Capture Start Point |
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The IMS Log Reader Capture will by default use the "current" time as starting point. Capture can also be started or restarted at a point-in-time by explicitly specifying the starting LSN in the IMS Log Reader Capture Agent configuration (.cab) file with JCL similar to sample member SQDCONIM included in the distribution.
Syntax
sqdconf modify <cab_file_name>
--zlog=<log_stream_name>
[--lsn =<STCK.sequence_number>]
Keyword and Parameter Descriptions
<cab_file_name> - Must be specified and must match the name specified in the previous create command.
--zlog=<log_stream_name> The z/OS System LogStream created earlier.
[--lsn =<STCK.sequence_number>] - Specifies a UTC timestamp and an IMS Log Sequence Number. The timestamp is a 16 hexadecimal digit time of day UTC clock value in IBM Store Clock (STCK) format. The Sequence Number is a 1 to 16 hexadecimal digit IMS log Sequence Number. The lsn 0 or 0.0 specifies "now" which is the default when this parm is not specified.
Example 1
Set the LSN to 0 (zero means current time) at the capture agent level for all DBD's) with the SQDCONF modify command.
//*----------------------------------------
//*- SET LSN AT GLOBAL LEVEL
//*----------------------------------------
//SETLSN EXEC PGM=SQDCONF
//SYSPRINT DD SYSOUT=*
//SYSOUT DD SYSOUT=*
//SQDPARMS DD *
modify /home/sqdata/imscdc1/IMSCDC1.cab
--lsn=0
//*
Example2
Set the LSN to to the first IMS Log Sequence Number for a specific IBM Store Clock (STKC) value with the SQDCONF modify command.
//*----------------------------------------
//*- SET LSN AT GLOBAL LEVEL
//*----------------------------------------
//SETLSN EXEC PGM=SQDCONF
//SYSPRINT DD SYSOUT=*
//SYSOUT DD SYSOUT=*
//SQDPARMS DD *
modify /home/sqdata/imscdc1/IMSCDC1.cab
--lsn=d011f1b94eb3e0c0.0
//*
