[asterisk-users] OT - log rotation [solved]

[Stanisław Pitucha]

2009/9/4 Olivier <oza-4h07 at myamail.com>:
> From an off-list comment, I think the explanation is :
> - some apps are opening and closing log files before and after each writing,
> - some are leaving log files open.
>
> When a log file is currently rotated, both apps can't append anything
> anymore to log files.

That's not correct (on a *nix system anyways). In the second case, if
some app holds a descriptor of an open file and you move the file
around in the same filesystem, nothing changes. You can rename 'log'
to 'log.1', but it doesn't change the descriptor and the application
will still write to the file (it's just named differently).
The logger restart just does a { close(); open(); } and you're logging
to a new 'log' again. This way you don't lose any messages during the
rotation.

-- 
Kind regards,

Stanisław Pitucha, Gradwell Voip Engineer

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