[Buildbot-devel] Nine: support for upgrades

[Dustin J. Mitchell]

At the moment, the plan is that upgrades to nine will lose all build
data - we aren't writing any code to try to unpickle existing builds
and import that data into the database as part of the normal
upgrade-master process.  One major advantage is that we don't need to
keep all of the old classes around in the codebase to support
unpickling.

This might make a nice, distinct project for someone to work on, though.

I'd like to gauge reactions to the idea of losing all build history on
upgrade to 0.9.0 - is that a showstopper to ever upgrading, or an
acceptable cost?

Dustin