Re: Dual-way replication?, What gets replicated?
[EMAIL PROTECTED] wrote: Balthasar Cevc wrote: 1. Is it possible to have a server be master and client at the same time - with the effect of being able to use 2 servers at the same time for IMAP connections? Not at the moment. David's code (and proxy) are fairly simple because they don't allow for shared mailboxes. If you can guarantee that a client will never have to leave one server, then a simple proxy like Perdition would suffice. I plan to allow for backends in a Murder to replicate one another. -- Kenneth Murchison Systems Programmer Carnegie Mellon University Cyrus Home Page: http://asg.web.cmu.edu/cyrus Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
Re: Dual-way replication?, What gets replicated?
Hi Ken, hi Wolfgang, thanx for your quick answers! Baltasar _ former 03 gmbh _ infanteriestraße 19 haus 6 eg _ 80797 muenchen _ [EMAIL PROTECTED] _ www.former03.de _ fon 0941.206.6952 _ fax 089.322112.11 _ mobil 0176.232.20.822 Cyrus Home Page: http://asg.web.cmu.edu/cyrus Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
Re: Dual-way replication?, What gets replicated?
Balthasar Cevc wrote: 1. Is it possible to have a server be master and client at the same time - with the effect of being able to use 2 servers at the same time for IMAP connections? Hi Balthasar, the setup at David Carter's site uses two machines: one acting as master for half of the users, te other one as slave. The roles for the other half of users are reversed. To make it work, there needs to be - something telling the client where to connect - something telling the MTA where to deliver I am currently testing David's imapproxy changed to get user/server association from a mysql db. Since my MTA calls deliver from a script anyway, it was no problem to obtain the correct server for delivery from the mysql db as well. In case of a failure, the db needs to be updated to send all users to the working server. For recovery, as well as while redistributing users, one user at a time would be blocked (cannot login, and mta cannot deliver) while it is synced Wolfgang Hamann Cyrus Home Page: http://asg.web.cmu.edu/cyrus Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
Re: Dual-way replication?, What gets replicated?
former03 | Baltasar Cevc wrote: Hi everybody, thanx to everybody who contributed for this great piece of server software (and the nice support on the mailing list); explicitly thanx to Ken for everything and David for the replication code! Two questions, as I'm not able to jump into the code deeply enough to answer them myself... 1. Is it possible to have a server be master and client at the same time - with the effect of being able to use 2 servers at the same time for IMAP connections? Not (easily) with the current code, unless you have a way external to Cyrus to keep track of which server is the master for a given mailbox. You can NOT serve mailboxes/messages from a machine which is replicated. I plan to add code, probably using MUPDATE, which will allow load balancing across multiple replicated servers. 2. What gets replicated. Is it just messages? Or also the sieve things? I've seen some sieve routines in the replication code, however, as it's all in the imap directory, I am not sure... Anything related to IMAP and Sieve (mailboxes, mailbox annotations, messages, message flags, Sieve scripts, etc). Any non-critical data such as deliver.db or tls_sessions.db is not replicated. -- Kenneth Murchison Project Cyrus Developer/Maintainer Carnegie Mellon University Cyrus Home Page: http://asg.web.cmu.edu/cyrus Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
Dual-way replication?, What gets replicated?
Hi everybody, thanx to everybody who contributed for this great piece of server software (and the nice support on the mailing list); explicitly thanx to Ken for everything and David for the replication code! Two questions, as I'm not able to jump into the code deeply enough to answer them myself... 1. Is it possible to have a server be master and client at the same time - with the effect of being able to use 2 servers at the same time for IMAP connections? 2. What gets replicated. Is it just messages? Or also the sieve things? I've seen some sieve routines in the replication code, however, as it's all in the imap directory, I am not sure... Thanx! Baltasar _ former 03 gmbh _ infanteriestraße 19 haus 6 eg _ 80797 muenchen _ [EMAIL PROTECTED] _ www.former03.de _ fon 0941.206.6952 _ fax 089.322112.11 _ mobil 0176.232.20.822 Cyrus Home Page: http://asg.web.cmu.edu/cyrus Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
