HP-UX TN3270 Administration Guide

Using TN3270 Log Messages
Backing Up and Resetting a Log File
Chapter 4 49
Backing Up and Resetting a Log File
TN3270 provides a backup mechanism to prevent log files from becoming
too large and consuming disk resources. When a log file reaches 1
megabyte, TN3270 copies its current contents to a backup file and then
clears the log file. If error and audit information is logged in one file, a
maximum of 2 megabytes of log information is stored. If error and audit
information is logged in separate files, a maximum of 4 megabytes of log
information is stored.
The backup file has the file name bak and the same file extension as the
file it is backing up. The backup file is created in the same directory as
the audit or error log file from which it is copied. If you need to keep the
information, rename this file or copy it to a different directory so that it
is not overwritten the next time the log file reaches 1 megabyte.