Rules

The following rules apply:

• For DLOG, the system log is spooled and periodically printed by JES3 output service. By default, the log is printed every 500 lines to output class A. To change these defaults, code the LOGLMT and LOGCLS parameters of member IEASYSnn of the MVS™ SYS1.PARMLIB data set. You can also print the disk log by entering the MVS WRITELOG command from the global.
• You can specify during initialization whether you want JES3 DLOG to be active. You can also use commands to dynamically changes the status of JES3 DLOG. Through the use of *MODIFY,O commands, you can enable or disable DLOG. However, JES3 rejects any command that would leave your installation without some form of hardcopy log.
• You can specify which MVS commands you want recorded in the system log using the HARDCOPY parameter in the CONSOLxx member of the MVS SYS1.PARMLIB data set. For information about SYS1.PARMLIB see z/OS MVS Initialization and Tuning Guide.Also, the HCFORMAT keyword on the HARDCOPY parameter provides you the option of recording year dates in 2- or 4-digit format. Compare the sample sections of the log entries in Figure 1 to Figure 1 for the differences in the fields that contain the console name and year as follows:

  Year Date Format

  Column  

  2-Digit

  6-13 - Console Name 15-16 - 2-digit year

  4-Digit

  5-12 - Console Name 13-16 - 4-digit year