[Mailman-Users] Mailman on UML?

Tierra etierra at gmail.com
Thu Feb 3 22:34:22 CET 2005

On Thu, 3 Feb 2005 12:53:21 -0500, Todd Slater <dontodd at columbus.rr.com> wrote:
> I'd be interested in knowing if anybody is successfully using Mailman
> under User Mode Linux and what sort of specs this requires. I am trying
> it with 64MB RAM and have memory errors, but I'm also running Apache and
> Dovecot for IMAP mail. httpd and python seem to use the most memory.
> That's running on Fedora Core 2.

Yes, I have it working on a UML instance with only 64mb ram, and 256mb
swap. But you do really have to watch your memory consumption with
Mailman. I've never run Dovecot (I run Courier-IMAP), but so long as
your not running anything else besides what you've mentioned (Dovecot,
Apache, and Mailman), you should be cutting it just about even. I'd
look into cutting some of the un-used modules out of Apache.

On Thu, 03 Feb 2005 13:48:47 -0500, John Dennis <jdennis at redhat.com> wrote:
> I believe you're assumption is correct, mailman should run fine in a
> virtual machine. When you say you're getting memory errors I assume you
> meant you've exhausted virtual memory and swap space in your VM, if
> that's correct I don't think there is much you can do aside from improve
> your VM. I don't personally have any experience with UML but I can tell
> you that virtualization is getting a lot of attention here of late and
> the preferred technology is Xen, not UML, info on Xen can be found here:
> http://www.cl.cam.ac.uk/Research/SRG/netos/xen
> --
> John Dennis <jdennis at redhat.com>

Yes, Xen is currently faster, but I've recently heard this from Jeff
Dike a couple days ago:
"Also, I'm getting UML help from other people at Intel, and those
patches have started going into my tree. We're separating out the
userspace code from the kernel code in preparation for a ring 0 port
of UML."
Which I believe should put UML back in the running right alongside Xen
with no overhead.

Personally, I'm rooting for UML, but that's probably mostly because
that's what I'm currently setup with. It's come a long way, and it's
sitting pretty stable. Xen isn't nearly as mature, but I love watching
the progress of both of them. Both are really great projects.

Bryan Petty

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