Novell ACCESS MANAGER 3.1 SP1 - GATEWAY GUIDE Manual page 112

request_rate = 1000 requests per second
logentry_size = 1 KB (1,024 bytes)
num_services = 1
diskfull_time = (1 GB) / (1000 * 1 KB * 1) = 1048 seconds (17.47
minutes)
The logging disk space will fill up every 17.47 minutes.
To calculate the diskfull_time for your Access Gateway:
1 Determine the values of the four variables listed above.
2 Use the diskfull_time formula to calculate how often you can expect your logging disk to fill,
then use the result in
If your diskfull_time interval is too short to be practical for your rollover schedule, the easiest option
is to reduce the log entry size by configuring the proxy services to log less information per
transaction.
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 111
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)
112 Novell Access Manager 3.1 SP1 Access Gateway Guide
Calculating max_roll_time.
to calculate how often you should have the cache device roll over
"Calculating