From: | Neil Conway <neilc(at)samurai(dot)com> |
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To: | Greg Copeland <greg(at)CopelandConsulting(dot)Net> |
Cc: | Antti Haapala <antti(dot)haapala(at)iki(dot)fi>, Curtis Faith <curtis(at)galtair(dot)com>, Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>, Pgsql-Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Proposed LogWriter Scheme, WAS: Potential Large |
Date: | 2002-10-07 16:35:48 |
Message-ID: | 87d6qmqk9n.fsf@mailbox.samurai.com |
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Lists: | pgsql-hackers |
Greg Copeland <greg(at)CopelandConsulting(dot)Net> writes:
> Ya, I have read this before. The problem here is that I'm not aware of
> which AIO implementation on Linux is the forerunner nor do I have any
> idea how it's implementation or performance details defer from that of
> other implementations on other platforms.
The implementation of AIO in 2.5 is the one by Ben LaHaise (not
SGI). Not sure what the performance is like -- although it's been
merged into 2.5 already, so someone can do some benchmarking. Can
anyone suggest a good test?
Keep in mind that glibc has had a user-space implementation for a
little while (although I'd guess the performance to be unimpressive),
so AIO would not be *that* kernel-version specific.
> Anyone have any idea of Red Hat's Advanced Server uses KAIO or what?
RH AS uses Ben LaHaise's implemention of AIO, I believe.
Cheers,
Neil
--
Neil Conway <neilc(at)samurai(dot)com> || PGP Key ID: DB3C29FC
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