<logdir> is /etc/log for filers and /logs for NetCache appliances.
Wed Feb 9 17:34:09 GMT [rshd_0:auditlog]: root:OUT:date: Wed Feb 9 17:34:09 GMT 2000
This indicates that there was an rsh session around Wed Feb 9 17:34:09 GMT which caused the date command to be executed. The user performing the command was root. The type of log is data output by the system as indicated by the OUT keyword.
Commands typed into the filer or executed by rsh are designated by the IN keyword as in:
Wed Feb 9 17:34:03 GMT [rshd_0:auditlog]: :IN:rsh shell: RSH INPUT COMMAND is date
The start and end of an rsh session are specially demarcated as in
Wed Feb 9 17:34:09 GMT [rshd_0:auditlog]: root:START:rsh shell:orbit.eng.netapp.com
and
Wed Feb 9 17:34:09 GMT [rshd_0:auditlog]: root:END:rsh shell:
The maximum size of the auditlog file is controlled by the auditlog.max_file_size option. If the file gets to this size, it is rotated (see below).
Every Saturday at 24:00, <logdir>/auditlog is moved to <logdir>/auditlog.0, <logdir>/auditlog.0 is moved to <logdir>/auditlog.1, and so on. This process is called rotation. Auditlog files are saved for a total of six weeks, if they do not overflow.