On Sat, 4 Nov 2017 01:57:31 +0200 Sami Ketola <sami.ketola at dovecot.fi> wrote:> >> > >> While it might be possible to disable all the other services except > >> master I must ask why? How would the users be accessing their mails then? > >> > >> Sami > > > > Hello Sami, > > > > you did not read my first post. We are talking about a multihost > > installation where one host does SMTP and LDA, and the other does POP and > > IMAP (with dovecot). Now we want to use dovecot-lda for the local delivery > > _on the SMTP host_. So there is no need for open POP or IMAP ports and the > > corresponding running services. > > Again that does not answer my question why? Why do you want all the locking > problems and multi-access problems that come with setup like that? What is > the actual problem that you are trying to solve? > > SamiReally, I can hardly believe you don't now large loadbalancing ISP setups with multiple nodes per single service ...? The simple problem: massive numbers of emails -- Regards, Stephan
> On 4 Nov 2017, at 10.31, Stephan von Krawczynski <skraw.ml at ithnet.com> wrote: > > On Sat, 4 Nov 2017 01:57:31 +0200 > Sami Ketola <sami.ketola at dovecot.fi> wrote: >> Again that does not answer my question why? Why do you want all the locking >> problems and multi-access problems that come with setup like that? What is >> the actual problem that you are trying to solve? >> >> Sami > > Really, I can hardly believe you don't now large loadbalancing ISP setups with > multiple nodes per single service ...? > The simple problem: massive numbers of emailsNope. Has never been done. Has never been recommended way. You will get more problems with that setup that you are seeking to solve. Use multiple dovecot backends with director ring in front and switch to lmtp delivery via the director ring if you have scalability problems. Then you can just increase number of backends in case they are overloaded. Sami
On Sun, 5 Nov 2017 10:44:25 +0200 Sami Ketola <sami.ketola at dovecot.fi> wrote:> > On 4 Nov 2017, at 10.31, Stephan von Krawczynski <skraw.ml at ithnet.com> > > wrote: > > > > On Sat, 4 Nov 2017 01:57:31 +0200 > > Sami Ketola <sami.ketola at dovecot.fi> wrote: > >> Again that does not answer my question why? Why do you want all the > >> locking problems and multi-access problems that come with setup like > >> that? What is the actual problem that you are trying to solve? > >> > >> Sami > > > > Really, I can hardly believe you don't now large loadbalancing ISP setups > > with multiple nodes per single service ...? > > The simple problem: massive numbers of emails > > Nope. Has never been done. Has never been recommended way. You will get more > problems with that setup that you are seeking to solve. > > Use multiple dovecot backends with director ring in front and switch to lmtp > delivery via the director ring if you have scalability problems. Then you > can just increase number of backends in case they are overloaded. > > SamiSorry to say this setup works flawlessly for years. The only addition we will make now is to do the delivery with dovecot-lda. Everything else (including multiple dovecot pop/imap servers) will stay as is. Hopefully dovecot-lda does not fiddle around with the indexes too much, as we then would have to delete this part of the code out. It is not needed as we found out during the last 10 years of delivering mails into the maildirs by atomic rename action while dovecot is presenting them over imap. -- Regards, Stephan