From: Adam Clark (adam.clarkngv.vic.gov.au)
Date: Wed Jan 04 2006 - 21:12:51 CST

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Maybe we need to create a howto doc for mass spaming and direct
questions like this to it.

Adam

Adam Clark
Network Administrator

National Gallery of Victoria
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Telephone: +61 3 8620 2369
Fax: +61 3 8620 2565
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DISCLAIMER: This email and any files transmitted with it are confidential and intended solely for postfix-userspostfix.org. If you are not the named addressee you should not disseminate, copy or alter this email. WARNING: Although National Gallery of Victoria has taken reasonable precautions to ensure no viruses are present in this email, the organisation cannot accept responsibility for any loss or damage arising from the use of this email or attachment.-----Original Message-----
From: owner-postfix-userspostfix.org
[mailto:owner-postfix-userspostfix.org] On Behalf Of Victor Duchovni
Sent: Thursday, 5 January 2006 1:52 PM
To: Postfix users
Subject: Re: Just A Silly Question

On Thu, Jan 05, 2006 at 09:26:54AM +0700, Fajar wrote:

> I don't know exactly, like I said in subject, it just a silly question

> who knows someone can describe how powerful postfix based mail server
> to handle for example :
> handling 10-20 thousand concurrent connections smtp sending per second

There is no such thing as "concurrent per second" it is either
"concurrent" (parallel) or per-second. Given an "average" connection
lifetime "L", a connection rate "R" and a connection concurrency "C",
the following holds:

        C = R * L

Other important numbers are the message rate, and message sizes.

> handling maybe around 10 thousand concurrent connections smtp for
> receiving per second takes average email around 10 kbytes.
>
> Do you think like load balancer needed?
>

Your questions are very naive. Perhaps you need more experience before
you contemplate designing a high throughput system of the sort you are
implying.

--
        Viktor.

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