The mailing list for listmasters using Sympa

[Olivier Salaün <address@concealed>]

I complete Serge's response with optimization hypothesis we need to explore.
We have noticed that Sympa processes gets fat sometimes ; Charles Paul 
has made a proposition we need to test, see 
<http://sourcesup.cru.fr/tracker/?func=detail&atid=170&aid=4787&group_id=23>

Serge Aumont a écrit :
> Martin, Nicolas wrote:
> > Hi,
> >
> > Concerning the scalability of Sympa, the only information I found is 
> > that it can undergo "up to 100.000 subscribers" per list. My 
> > questions are :
> This information is not up to date. Some guys recently distributes a 
> big message (110 Ko) to 750.000 subscribers using Sympa version 5.4.3 
> with 2 servers : one dedicated to Sympa and one to Sendmail 
> distribution. The delay for Sympa process was 2h30, and during this 
> initial process more than 90% of the messages was sent up to the 
> destination MTA (99% in 4h) ; the MTA was already in many white list.
>
> Using Sympa 6.0 with its new bulk mailer we could do it in much more 
> better way because the repartition of the distribution process on 
> defferent servers will be very easy.
> > -> is there a maximum number of lists / host ?
> Yes there is a maximum of lists because lists configs are stored on 
> files and list object are stored in memory. We don't known exactly 
> this number. Our own server have more then 1000 lists, we known 
> servers with 10000. may be some can share their experience ?
> > -> is there a maximum number of messages / list / day ?
> The limit for this is probably very high. I think the real limit will 
> not comes from Sympa itself but from remote antispam and may be also 
> because subscribers will not accept so many messages ;-)
> > -> Any other kind of limitation ?
> The real limitation is the one I described first : lists object are 
> stored in memory (I mean list configs, not subscribers). This 
> limitation is mainly related to the web interface where the 
> distribution process could support extremely high number of lists, 
> subscribers and messages. We are working on that the first step is to 
> move spools in database. That's what does Sympa 6.0.
>
> Serge Aumont