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Subject: Re: Large job submissions
From: Greg Hackney (hackneyswbell.net)
Date: Tue Jul 04 2000 - 10:44:59 CDT

Fransciso,

How many simultaneous SMTP connections does the mailing list server use
to pump email into your delivery server? If it's not critical that these
messages
be delivered right away, then it's not critical that they ram them down your
throat
with a large number of simultaneous deliverys. If so, ask them them to back
it down.

> Will 256MB be OK?

If you receive 20,000 messages of 20k, that's not enough. Since you have an
8GB drive,
why be stingy with the spool space.

> So far I was thinking of /var/spool/postfix and
> /var/spool/mqueue. Which directory will hold all the incoming messages
"mqueue?"

Typically it's all in /var/spool/postfix. "mqueue" is a Sendmail-ism.

> Will 50 SMTP agents be ok with 64MBs?

Depends on your individual system resources. For example, my system (DEC
Alpha Tru64 UNIX)
is currently using 78MB for the kernel and 24MB for the name service cache.
You may want to trim things
down in resources.cf. Memory is fairly cheap nowdays, why not buy some
more. If nothing else trade
the 8 GB drive to someone else in exchane for a 2GB and some memory.

> The current machine could not handle the job submition.
> running Solaris/sendmail

Posfix is a better performer than Sendmail, by design. 

--
Greg

----- Original Message -----
From: "Francisco Reyes" <franreyes.somos.net>
To: "Postfix List" <postfix-userspostfix.org>
Sent: Tuesday, July 04, 2000 7:08 AM
Subject: Large job submissions

> At work I may be given the chance to try PostFix.
> We have a process which creates about 20,000 emails at once.
> Based on what I have been told so far the current machine
> couldn't handle it and they had to change the submitting program
> to send smaller batches.
>
> I haven't got a clear picture yet of the requirements, but it
> seems that delivery time is not the biggest problem, but the
> machine accepting all these emails. The current machine could
> not handle the job submition. I am sure that machine is probably
> not configured properly, but it is much easier for me to try
> postfix than to try to figure out what they did to that box
> (running Solaris/sendmail and I am most familiar with FreeBSD
> and now learning Postfix).
>
> What kind of changes can I make to accept such big jobs?
> They are giving me a test box at first with only 64MB of ram and
> probably an 8Gig drive, so there is not much room for
> configuration there. Will 50 SMTP agents be ok with 64MBs? I
> expect message sizes to be between 5K and 20K.
>
> If this works out, then I will get another computer and I would
> like suggestions on terms of some basic specs. For instance what
> directories would benefit from having their own disk?
> So far I was thinking of /var/spool/postfix and
> /var/spool/mqueue
> Which directory will hold all the incoming messages "mqueue?"
> Will 256MB be OK?
>
> Again the overriding concern does not seem to be that the
> messages go out super fast, but that the machine can accept all
> the messages. It really doesn't make much difference if the
> machine takes 30 minutes or two hours. Obviously I want to
> create the best setup I can with whatever hardware they give me
> so I would play with the settings before going on production.
>
> Francisco
>
>