On Fri, 1 Apr 2011 16:48:55 +0200 Ondřej Surý <ond...@sury.org> wrote:
> Hi, > > with recent (kinda accidental) upload of 2.4 to debian unstable the > need for automatic conversion from older database format (2.2) to the > new one (2.4) yet again arised. Anyone already has something written > or is willing to help write one? The problem is berkeley db files - which is a big problem, because you actually have to dump with the OLD package - regardless of what version of Cyrus you have. It's the BDB library that's the issue. Otherwise, Cyrus 2.4 should automatically upgrade every other database format on first access. I really, really wanted to have BDB able to handle in-place upgrades as well, but I haven't been able to figure out a way. There is an ->upgrade method on databases, but it says it's destructive and can fail - so you can't just run it during the startup process and hope... unless you take a backup first! Eventually my goal is that you can change the DB type in imapd.conf and restart Cyrus, and it will just work. We're nearly there - it will automatically convert between types (by reading the magic from the top of the file) - but it just can't upgrade BDB. Answer that question, and I can give you a 2.4.x release that upgrades magically! Bron.
