fooler wrote:
> ----- Original Message -----
> From: "Brian Baquiran" <[EMAIL PROTECTED]>
>
> > You don't need clustering for 100k subs, really.
I should take back what I said earlier. Even if you don't need
clustering from a performance standpoint, you'll probably want it for
reliability.
> brian this is depends how aggressive your clients reading and sending their
> emails *simulteneously* plus how big per email size per se.
> usually email service
> bottleneck is disk i/o.
> busy disk i/o will affect others i/o like network
> i/o and memory i/o for example or even disk i/o itself
>From my experience, your network (specifically, your incoming pipe) will
get saturated WAY before disk I/O becomes a problem. Why? Because each
of your users has X number of friends, enemies, aquaintances, and
spammers trying to send him mail. Since the time required to handle an
SMTP session will, in most cases, be more than the time required to
queue and deliver the message locally, your main limiting factors for
performance (mail thoughput) will be your network latency and bandwidth.
> (blocking reads or
> blocking writes which causes pendings and delays)
You are much more likely to encounter blocking reads/writes on the
network than on disk.
Brian
--
"Rebooting does not make you smarter."
-- Mark Misani
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