On 8/27/2004 17:40, "Brad Knowles" <[EMAIL PROTECTED]> wrote:
> At 6:37 PM -0400 2004-08-26, Mike wrote: > >> Wondering if anyone has a sense how long a message takes to send before I >> can make changes to the membership list. The concern is if I make changes to >> the subscriber list too quickly (remove them), then those folks may not get >> the message. > > The answer is -- it depends. A fast machine on a fast network > with all recipients who are likewise on fast machines attached to > fast networks, and with relatively few users, may be completely > delivered in a few minutes. But there could always be stragglers > that are minutes, hours, or even days behind. But it doesn't matter when the messages get delivered. Removing an address from the list does not reach out into the Internet and snatch back the message that is on its way. What matters is how the Mailman code gathers the addresses a particular message is to be delivered to, and what it's doing while it sends out the message to those addresses. Does the code open the list once, obtain the addresses it needs (the non-digest, not-no-mail, not duplicate filtered, etc) and then do its thing without regard to the list object on disk, or does it keep peeking into the object on disk while it's emitting messages. Without looking at the code, my guess is it is more like the former than the latter. A quick look at the code suggests that's the case (the code which sends out a message gets the recipients pre-cooked from an object). In that case, the questions are is the list locked while the gathering takes place? if not, how long does the gathering take? Once the addresses are gathered up (or the list is locked for gathering), the list membership can be changed without worry...the worst that will happen is that a bounce will come back related to an address not on the list when the bounce comes. If the code keeps peeking at the list object on disk, then what matters is how long it takes to get the message to the SMTP server to which we submit the messages. That time can be read from the smtp log, and provides an upper bound. I doubt one needs to wait that long. It's longer if Mailman is VERPing. --John ------------------------------------------------------ Mailman-Users mailing list [EMAIL PROTECTED] http://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://www.python.org/cgi-bin/faqw-mm.py Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/
