HP -UX SNAplus2 Manual do Utilizador descarregar pdf (Página 139)

Chapter 4 139

Basic Conﬁguration Tasks

Conﬁguring Logging

SNAplus2 writes log messages describing abnormal events (and,

optionally, normal events) to log ﬁles. When you try to diagnose a

problem, the ﬁrst place to look is in the log ﬁles, because the log

messages provide information about the cause of the problem and the

action you should take.

SNAplus2 logs messages for the following categories of event:

Problem

An abnormal event that degrades the system in a way

perceptible to a user (such as abnormal termination of

a session).

Exception

An abnormal event that degrades the system but that

is not immediately perceptible to a user (such as a

resource shortage), or an event that does not degrade

the system but may indicate the cause of later

exceptions or problems (such as receiving an

unexpected message from the remote system).

Audit

A normal event (such as starting a session).

To distinguish between logs relating to normal and error conditions, the

different message categories are logged to different ﬁles. Problem and

exception messages are logged to the error log ﬁle; audit messages are

logged to the audit log ﬁle.

SNAplus2 provides a backup mechanism to prevent log ﬁles from

becoming too large and consuming disk resources. When a log ﬁle

reaches the maximum permitted size, SNAplus2 copies its current

contents to a backup ﬁle and then clears the log ﬁle.

By default, SNAplus2 uses the following log ﬁles:

Error log ﬁle

/var/opt/sna/sna.err

/var/opt/sna/bak.err (backup)

Audit log ﬁle

/var/opt/sna/sna.aud

/var/opt/sna/bak.aud (backup)

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HP -UX SNAplus2 Manual do Utilizador Página 139