The active log preformat utility (CSQJUFMT)

 

Use the CSQJUFMT utility to format active log data sets before they are used by a queue manager. If the active log data sets are preformatted by the utility, log write performance is improved on the queue manager's first pass through the active logs. If the utility is not used, the queue manager must format each log control interval at log write time before it is used. On the second and subsequent passes through the active log data sets, the log control intervals already contain data, so need no further formatting, and no performance benefit accrues.