On 24 Feb 2017, at 0.08, Mark Moseley moseleymark@gmail.com wrote:
As someone who is about to begin the process of moving from maildir to mdbox on NFS (and therefore just about to start the 'director-ization' of everything) for ~6.5m mailboxes, I'm curious if anyone can share any experiences with it. The list is surprisingly quiet about this subject, and articles on google are mainly just about setting director up. I've yet to stumble across an article about someone's experiences with it.
- How big of a director cluster do you use? I'm going to have millions of mailboxes behind 10 directors.
I wouldn't use more than 10.
I'm guessing that's plenty. It's actually split over two datacenters.
Two datacenters in the same director ring? This is dangerous. if there's a network connectivity problem between them, they split into two separate rings and start redirecting users to different backends.
- Do you have consistent hashing turned on? I can't think of any reason not to have it turned on, but who knows
Definitely turn it on. The setting only exists because of backwards compatibility and will be removed at some point.