Actually to be more accurate...
EZ Mailing List Manager -- using mySQL databases
And on each server there actually 6 qmail instances running called
qmqp1.<whatever.com> thru qmqp6.<whatever.com> and EZMail in setup to mail to
all QMQP servers in basically what equates to a round robin order. 5K here 5k
there and so on till all the addresses are spolled out. There are other ways
of doing it which include simply splitting a very large list into several
smaller lists and sitting each smaller list on it's own server. The biggest
problem with running 6 instances of qmail on one server is you have to set
your descriptors up high enough and then no matter what you max is you have
to get a calculator out and balance out all 6 instances or however many you
install on it so that you can never exceed your max descriptors. Even then
you still want to leave yourself a safety zone. So when I set mine up I
basically recompiled linux to be able to handle 64k discriptors and then
applied the big-todo patches and every other patch I could find and ones
recomeneded to me here in the list and then set the max concurrency for each
qmail (qmqp) service to 800 although obviously I could go allot higher than
that without worry about linux.. However you will find the higher you go
(anything above 800 or so) the more complaints you will get from ISP's like
aol and earthlink.. They really hate it when you open up 2k+ connections to
them emagine what the smaller ISP's will tell you. But at any rate it all
works just fine.. If your planing on multiple server then setup a linux
(standard configuration no editing or recompiling) install qmail and edit the
concurrency up to 800 make sure you have already applied the patches
required. You should have a system capable at that point of crankin out some
serious mail. Now read the install files that came with qmail on the qmqp
server.. Get it setup and running make sure you add the appropiate entries
for it to start automatically then go download majordomo or EZMail (recommend
Ezmail) a couple of guys that work with me say majordomo is easier to learn..
I find Ezmail much faster and more versatile so it's up to you.. If your new
then try majordomo if your not new to this then get Ezmail as it will have
the capabilities you want.
Anyways now I goto bed... For real this time..
--JT
>>>>>>>>>>>>>>>>>> Original Message <<<<<<<<<<<<<<<<<<
On 4/25/01, 5:35:39 PM, "Brett" <[EMAIL PROTECTED]> wrote regarding
RE: max concurrency for qmail is 500, what's it for sendmail?:
> James,
> Thanks for the info here. I have a couple more questions if you don't
mind.
> What method are you using to cluster these six servers together? We're
> looking to set something very similar up as we're going to be sending out
> large quantities of mail to several different mailing lists (not spam).
But
> we can't find any info regarding clustering and/or load balancing for
mail
> servers. Also, have you gotten blocked from any servers with such high
> concurrencies? Thanks again. I appreciate any help.
> Brett.
> -----Original Message-----
> From: James Stevens [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, April 25, 2001 5:12 PM
> To: Henning Brauer; [EMAIL PROTECTED]
> Subject: Re: max concurrency for qmail is 500, what's it for sendmail?
> You are correct ;) Sendmail can only sustain one exsistance of it's
> delivery object meaning it can't multithread like the newer MTA's soo
> when sendmail runs a large q say 10k messages all those messages go into
> q and get piped out through one thread instance of sendmail whereas qmail
> simply fires up 500 threads and crunches through the q message by message
> until it's done. You can also reconfigure qmail to allow up to 1k
> concurrency and if you really want mailing power you can edit and
> recompile your system and qmail and go up as high as you want. I have
> mine set at 800 on 6 different servers and have never had a bootleneck...
> Anyways theres my two cents .. Now I go home and sleep (trying to
> remember what that word actually means)
> --JT
> >>>>>>>>>>>>>>>>>> Original Message <<<<<<<<<<<<<<<<<<
> On 4/25/01, 4:42:34 PM, Henning Brauer <[EMAIL PROTECTED]> wrote
> regarding Re: max concurrency for qmail is 500, what's it for sendmail?:
> > On Wed, Apr 25, 2001 at 03:59:04PM -0700, Brett wrote:
> > > Does anybody know the maximum concurrency for sendmail? From what I
> > > understand, with the big concurrency patch, it's 500 for qmail but I
> can't
> > > find any data on sendmail. Thanks in advance.
> > 1 if I'm not totally mistaken...
> > --
> > Henning Brauer | BS Web Services
> > Hostmaster BSWS | Roedingsmarkt 14
> > [EMAIL PROTECTED] | 20459 Hamburg
> > http://www.bsws.de | Germany
> > Unix is very simple, but it takes a genius to understand the simplicity.
> > (Dennis Ritchie)
