On 17 Dec 1999 13:34:39 -0000 , "Petr Novotny" writes:
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> On 17 Dec 99, at 7:28, [EMAIL PROTECTED] wrote:
> > The inability to do header rewriting without making
> > two trips through the queue causes a severe performance
> > hit, if you are doing anything other than low volume.
>
> Rewriting headers of all messages is a severe performance hit. Or
> can you instruct sendmail not to? I couldn't find how.
Rewriting headers chews up CPU. Re-enqueueing the
message (in qmail) causes between 4 and 5 (serial)
fsyncs, which pretty much dwarfs any latency introduced
by scanning and rewriting the headers of the message.
> > That is forwarding with only one trip through the queue.
>
> You mean reading "aliases" before delivering, and therefore
> deciding to forward immediately? Maybe with some tweaking, the
> current virtualdomains code might do that.
Yep, that's pretty much what I mean. Unfortunately,
it severely violates qmail's "philosophy."
--
Chris Mikkelson | ... a pet peeve of mine is people who directly edit
[EMAIL PROTECTED] | the .cf file instead of using the m4 configuration
| files ... I treat the .cf file as a binary file
| - you should too. --- Eric Allman
