From: Phillip Gawlowski <cmdjackryan@...>
Date: 2008-05-22T08:47:45+09:00
Subject: Re: Multiple processes logging to single file

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pachl wrote:

| After inspection of the log file, each process logged 20 times, all
| messages interleaved of course. It looks like it works, but am I
| delusional? I'm on an OpenBSD box. Does the OS handle caching/writing
| from multiple sources?

Yes, the OS should manage that (it is file-system level, rather than
userspace level). However, you can tweak your code to have
'transactional' logs (i.e. that every application logs a meaningful
chunk of information in one go).

Anyway, the file system and drivers take care of the actual writing.

Though, having everything log into one logfile *may* result in fractured
files, or odd race conditions and/or deadlocks. It might be saner to log
each process to its own file.

- --
Phillip Gawlowski
Twitter: twitter.com/cynicalryan
Blog: http://justarubyist.blogspot.com

Don't over-comment.
~            - The Elements of Programming Style (Kernighan & Plaugher)
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