LOGR parameters for format utility

For a LOGR policy — DATA TYPE(LOGR), valid data names are LSR, LSTRR, DSEXTENT, and SMDUPLEX.

ITEM NAME(LSR) NUMBER( )

Specifies the maximum number of log streams that can be defined to the LOGR policy. Each LSR record consumes one track in the LOGR couple data set. (Default=1, Minimum=1, Maximum=32767)

ITEM NAME(LSTRR) NUMBER( )

Specifies the maximum number of structure names that can be defined to the LOGR policy. Each LSRTRR record consumes one track in the LOGR couple data set. (Default=1, Minimum=1, Maximum=32767)

See Increasing the space available for DASD log data sets for guidance on the DSEXTENT parameter.

ITEM NAME(DSEXTENT) NUMBER( )

Specifies the number of additional log data set directory extents to define for log stream log data sets. Use this parameter to increase the potential log data set directory capacity for a sysplex. Each additional directory extent specified goes into a common pool available to any log stream in the sysplex. System logger allocates these directory extents as needed when a log stream runs out of DASD log data set directory space. Each directory extent allows a log stream to extend by 168 log data sets.

When a DSEXTENT record is assigned to a log stream, that particular DSEXTENT record is only used for that specific log stream until it is no longer needed. Logger then removes the DSEXTENT record from that specific log stream use and put the DSEXTENT record back into the common pool.

Each DSEXTENT record consumes one track in the LOGR couple data set. (Default=0, Minimum=0, Maximum=99998)

See Increasing the space available for DASD log data sets for guidance on the DSEXTENT parameter.

ITEM NAME(SMDUPLEX) NUMBER( )

Specifies whether Logger should support system-managed duplexing rebuild. This specification can also affect the LOGR couple data set format level. See LOGR couple data set versioning — new format levels for an explanation of the different versions or levels of LOGR couple data sets. The value of the NUMBER parameter indicates one of the following:

Value: Description
0: Logger does not support system-managed duplexing rebuild.
1: Logger does support system-managed duplexing rebuild. The resulting HBB7705 format level of the LOGR couple data set is supported on z/OS® V1R2 and later releases.

This item can only be specified on systems at z/OS Version 1 Release 2 and higher.

When this item is omitted from the IXCL1DSU format utility, then Logger will handle it as if a value of zero (0) had been specified.

This specification does not consume any space in the LOGR couple data set. (Default=0, Minimum=0, Maximum=1)