Use the following formula to calculate the maximum rollover time value to be specified in the Roll over every field:
max_roll_time = diskfull_time / logs_per_service
For example, assume the following:
max_roll_time = 12 / 2 = 6 hours
If you roll your logs over by time intervals, the maximum time should be less than six hours. Otherwise, scheduling the download and deletion of log files is much more complicated and the window in which this can be done is narrower.
To calculate the max_roll_time for your Access Gateway:
Determine how many log files you want Access Gateway to generate per service before log space fills.
The minimum number is two.
Use the max_roll_time formula and the diskfull_time value obtained in Calculating diskfull_time to calculate how often you should have the cache device roll over the log files.
Record the max_roll_time result on your planning sheet.