Marcos Breguez wrote:

We want to take a snapshot of all lists and members in Mailman. So how can we prevent the current lists from being changed while being functional?

You can't. If Mailman (mailmanctl) and/or the web server are running, lists can be changed. If you want a guaranteed stable snapshot, you have to stop your web server or at least reload it with a config that doesn't include the Mailman CGI aliases (ScriptAlias in apache) and stop Mailman while you take the snapshot.

-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan