On Tue, Mar 24, 2015 at 03:50:48PM +0100, i...@itrezero.it wrote:
> So, you suggest to:
> 1) use many singleIP-instances with specific smtp/slow/veryslow/etc.
> transports (all bound on the same IP)
Yes.
> 2) not use a randomizer script in the master.cf BUT randomizing the outbound
> address through web application (that is a PHP script)
> Is it correct?
Yes.
> But here I have a further question (never really answered in my searches on
> Internet):
> how many instances can I set up on the same machine without deteriorating
> perfomances?
Depends on the machine, but modern servers have lots of CPUs, you
might even find that throughput improves because you'll now have
multiple queue managers working in parallel.
> I know that this answer is linked to the resources of the server, so suppose
> that it's a dual-core with 4 GB RAM.
[ Sorry, I'm spoiled, these days I'm mostly seeing servers that have
20 cores with 128GB or more of RAM. ]
I would guess that 8 instances will work just fine, many more may
be possible, but it depends on how much CPU contention there is.
How many IPs are you throwing at the "problem"?
--
Viktor.
