Log structure naming conventions
Adopt a naming convention for your coupling facility structures that helps to identify the purpose of the structure.
Use a format such as LOG_purpose_nnn:
- purpose identifies the type of use of the structure.
- nnn is a sequence number to allow for more than one structure for each purpose.
Here are some examples:
- LOG_DFHLOG_001
- For the CICS® primary system log. The structure must be large enough to avoid writing data to DASD. The average buffer size is small. See the sizing calculations in Structure size for system log usage.
- LOG_DFHSHUNT_001
- For the CICS secondary system log. The structure must be small, but requires a large buffer size. A structure of 150 KB per log stream might be sufficient.
- LOG_USERJRNL_001
- For user journals where block writes are not forced. The average and maximum buffer sizes of these structures must be the same.
- LOG_GENERAL_001
- For forward recovery logs and user journals in which block writes are forced periodically.
See also Develop a naming convention for system logger resources in z/OS MVS System Management Facilities.