[CentOS] Third party repo differences (was: Re: Repositories in CentOS 5.8)

[Les Mikesell]

On Sat, May 26, 2012 at 2:08 PM, Lamar Owen <lowen at pari.edu> wrote:
> On Saturday, May 26, 2012 12:47:04 PM Les Mikesell wrote:
>> Have you looked at MimeDefang's ability to run all of your scanners
>> out of one milter?
>
> Yes.
>
> Doing the same thing with amavisd-new on the few sendmail installs I still have running; amavisd-new runs clam (or, at one site, the sophos scanner) and spamassassin, and amavisd-milter does everything needed with one milter.  Using essentially the same setup with a couple of postfix sites, but no milter in that case.
>

Is it as efficient as the MimeDefang architecture?   Aside from just
unpacking the attachments once, MimeDefang runs a small binary as a
multiplexor that connects to all sendmail milter hooks and passes the
requests to the perl daemon as they happen.   That means you can have
a much smaller number of perl processes (that run spamassassin
in-process) than sendmail children, and fast operations done by
sendmail itself or a milter don't wait for slow operations tying up
memory.   I'm not sure there is even any equivalent way to do this
without milters.  See pg. 31 of
http://www.mimedefang.org/static/mimedefang-lisa04.pdf

Plus, you can add custom behavior to sendmail with a small snippet of perl.

-- 
   Les Mikesell
     lesmikesell at gmail.com