At 1:09 PM -0500 2005-03-14, Forrest Aldrich wrote:
I wonder what resources (and perhaps fine-tuning) would be required to get Mailman to accomodate these sorts of large tasks.
See <http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq01.015.htp>.
Also search for "performance" within the FAQ Wizard.
Earlier, I posted a question about High Availability and received only one response (thank you, though). There has to be a way to scale Mailman into a large infrastructure (?). Given that Mailman is, in of itself, an API, there must be some way to hook into the MTA (Postfix, in our case).
In terms of doing high-availability, I think most people have been splitting the front-end web service from the back-end list processing, as well as splitting the MTA services onto separate machines.
If you need the back-end Mailman-only stuff to also be highly available, you should be able to mostly do that with NFS, but this may run into some problems, and will certainly cost you in terms of performance.
I'd appreciate information from someone who has implemented something this significant.
Most of the information about large-scale mailing lists is already found in the FAQ entry mentioned above, or in the archives. There's a lot less information in the FAQ Wizard or in the archives with regards to high-availability configurations.
I don't think anyone anywhere has publicly talked about doing both high-volume and high-availability, at least not with Mailman.
The outsourced company we used in the past had sophisticated queue monitoring tools (php-based) as well as queue management (Postfix used as the MTA).
Postfix can be a really good MTA for mailing lists, at least for handling outbound e-mail.
If you get into lots of message scanning and having to pass through multiple scanning systems (e.g., multiple anti-spam and anti-virus scanning systems), then I think sendmail would scale better (due to the milter interface), but sendmail would also take more work to configure, and more care and feeding to keep going once it's configured.
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