SYSIN control statements for the DFHLSCU utility

You can use SYSIN statements to provide further input to DFHLSCU, and to tailor the report that it provides.

Format of the SYSIN control statements

Figure 6. SYSIN control statements for the DFHLSCU program
SYSIN   DD *
[JNLTYPE(
SYSTEM|FWDREC|USRJNL)]
[INTERVAL(
minutes)]
[AKPFREQ(
data-value)]
[LOGSNUM(
data-value)]
[TRANSDUR(
seconds)]

If you do not define a SYSIN data set, or SYSIN does not contain any control statements, default values are assumed. Each control statement must be on a separate line and must contain no spaces. The SYSIN statements you can code are as follows.

JNLTYPE
This statement indicates the type of journal the data set represents. Code this statement with one of the following operands:
SYSTEM
This data set represents the system log.
FWDREC
This data set represents a forward recovery log.
USRJNL
This data set represents a user journal or autojournal.

The default is SYSTEM.

INTERVAL
This statement permits you to divide the data set into time blocks, each time block being summarized in the summary report. This provides you with information allowing you to analyze journaling behavior over different time segments.

Specify this statement in minutes (0 thru 999999). The default is 30. A value of 0 indicates that no time-segmenting is to occur and that the period covered by the entire data set is to be used.

AKPFREQ
This statement specifies the activity keypoint frequency. This is relevant only for calculations of space needed by system logs. It is used to calculate the size of the CF space or staging data set needed for the system log. The value here is the AKPFREQ that you intend to use at CICS® Transaction Server for z/OS®, Version 3 Release 1.

Code either a value of 0, or a value in the range 200 thru 65535. The default is 4000.

LOGSNUM
For a CF log stream, this statement specifies the number of log streams that can use the structure associated with this journal or log. It is used in the calculation of the INITSIZE and SIZE attributes to include in the CFRM policy.

Code a value in the range 1 through 512. The recommended range is 1 through 20. The default is 10.

TRANSDUR
This statement specifies the transaction duration which is the execution time (between syncpoints) of the longest-running transaction that runs as part of the normal workload. TRANSDUR is only relevant for system log calculations.

Specify this value in seconds (0 thru 999999). The default is 3.

Related reference
Log stream sizing migration utility (DFHLSCU)
Recommendations made by DFHLSCU
Job control statements to run the DFHLSCU program
Considerations when using DFHLSCU
DFHLSCU return codes
Sample report from DFHLSCU
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