On Fri, Aug 21, 2015, at 17:58, Michael Menge wrote: > Hi, > > > Quoting Nic Bernstein <n...@onlight.com>: > > > On 08/20/2015 09:07 PM, Bron Gondwana wrote: > >> On Fri, Aug 21, 2015, at 11:42, Nicola Nye wrote: > >>> On Fri, Aug 21, 2015, at 11:35 AM, Bron Gondwana wrote: > >>>> Murder plus replication is a giant ball of suck right now. They > >>>> don't know about each other, and they interact badly :( > >>> So is that a case for documenting "Here be dragons, enter at your > >>> own risk" for the moment? > >>> Does it mean that admins should look at other backup mechanisms to > >>> handle failover and redundancy in a murder environment, because > >>> Cyrus's replication doesn't play nicely with murder? > >>> Or... ? > >> Or we need to fix murder and replication to work together nicely, > >> but that's hard work[tm]. > >> > > > > Ahem, some of us run Murderous Replicas all day long and it works > > well enough... Doesn't it? ;-) > > > > I can write this up, I just wasn't sure if it was still needed. I > > put a big ol' Note: in the replication page saying: > > > > Important > > > > Within a Cyrus /Murder/ > > > > <https://docs.cyrus.foundation/imap/developer/architecture.html#architecture-murder> > > environment, replicas must *not* be configured to invoke > > ctl_mboxlist(8) > > <http://docs.cyrus.foundation/imap/admin/commands/ctl_mboxlist.html> > > on startup (pushing the local mailbox list to the *Mupdate Master*). > > This may only be done on the Master instance. > > > > That's the only real gotcha I know of, but, having said that, I did > > write up a brief set of instructions about this very topic not that > > long ago (IIRC) for user mailing list. I figured I could start with > > that. > > > > > For the initial configuration I second this. But there are IHMO things > to consider on failover. > > > 1. ctl_mboxlist must be used with -m and -a Option on failover > 2. on big installations updating all entries in mailbox.db on the > mupdate server can take some time, on our setup we switch the IP address > of master and replic on failover
At which time you'll absolutely want them to both have the same servername! Bron. -- Bron Gondwana br...@fastmail.fm
