Novell ACCESS MANAGER 3.1 SP2 - ACCESS GATEWAY GUIDE 2010 Manual page 134

Calculating max_roll_time
Use the following formula to calculate the maximum rollover time value you should specify in the
Roll over every field
max_roll_time = diskfull_time / logs_per_service
For example, assume the following:
diskfull_time = 12 hours
logs_per_service = 2
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:
1 Determine how many log files you want the Access Gateway to generate per service before log
space fills.
The minimum number is two.
2 Use the max_roll_time formula and the diskfull_time value obtained in
diskfull_time" on page 133
the log files.
3 Record the max_roll_time result on your planning sheet.
Calculating max_log_roll_size
Use the following formula to calculate the maximum log file size you should specify in the
Maximum File Size field:
max_log_roll_size = logpartition_size / (num_services *
logs_per_service)
For example, assume the following:
logpartition_size = 600 MB
num_services = 2
logs_per_service = 3
max_log_roll_size = 600 MB / (2 * 3) = 100 MB
If you roll your logs over when they reach a specific size, the file size must be no more than 100
MB. Otherwise, the system runs out of disk space before you have three complete log files and
scheduling the download and deletion of log files is much more complex.
To calculate the max_log_roll_size for your Access Gateway:
1 Determine the values of the three variables listed above.
2 Use the max_log_roll_size formula to calculate the maximum size a log file should reach
before the cache device rolls it over.
134 Novell Access Manager 3.1 SP2 Access Gateway Guide
to calculate how often you should have the cache device roll over
"Calculating