Definitions

modules:

each SC module is one repository except kdepim, it will be split into kdepim and kdepim-runtime.
each extragear application is one repository.
kdereview and playground are implemented with individual repos and/or branches?
tarballs stay the same as it is now

split:

each SC application is one repository.
kdelibs, and kdepimlibs are one repo each kdepim will be split into kdepim and kdepim-runtime. kdebase can be split on workspace/runtime/apps, where optionally apps could be split further
extragear and review/playground as above.
tarballs stay the same as it is now

Comparison

Pros for each option (cons are rephrased as a pro for the other one) Note: no mention of the magnitude of each point has been made yet.

svn2git

modules:

some work has already been done on creating module repos
moves within modules can be ignored

split:

existing rules can be used with minor changes for "self contained" applications

Reviewboard

modules:

less projects to choose from when submitting a patch? [web only, not an issue with post-review]
no namespacing issue

split:

if something moves to another module, no changes are needed
ability to autocreate (and possibly assign) a review group per app, instead of per module

comments:

the reviewer groups won't be affected

Redmine

modules:

no namespacing issue

split:

source code links are automatically available on each applicaton page, instead of the module page

gitolite

modules:

no namespacing issue

split:

easier to find projects (git.kde.org/APPNAME.git instead of git.kde.org/SOMEMODULE.git)

git

modules:

projects can keep their interdependencies, module-wide libraries and so on
less server space

split:

moving a project (eg. to unmaintained) moves its whole history

user workflow

modules:

keeps a sense of community by having a whole module kept together
increases passive testing of trunk (more people to notice if the build's broken)
lower barrier to hacking on other projects in the module
easier to refactor a module [rare]
less downloading & disk space for those who want entire modules

split:

less downloading & disk space for people who only want a small part of a module
easier to get started on one little app?
easier to avoid being exposed to unstable versions of other projects [I think that's a bit selfish though]

comments:

kdesrc-build, build-tool and mr make it easy to handle large numbers of repos, although there's still room for improvement on userfriendliness.

releases

modules:

closer to what we have with svn??

split:

Social Workflows

This section tries to put together some personas for the way developers works. We will then try to ensure that the desired workflows are supported as well as can be achieved in the new setup.

the focused developer (e.g. "I work on Kate. Just Kate.")

Developers following this pattern will most likely find having a module that only contains the application they work on most convenient. This would allow them to easily update their application without pulling in changes from elsewhere in the software stack. That said, for development against the latest versions of the core, they will also need to be able to convenient update kdelibs and kdebase.

the fast paced application development team (e.g. "We release a new version of Amarok every 6 weeks.")
hybrid SC-but-also-individual-releases-with-focus-on-specific-targets (e.g. "Marble is part of the KDE Edu module, but also is targetting smart phones in an agressive manner.")
fast paced development driven by external requirements (e.g. "KDE PIM is in practice primarily developed according to the needs and schedules of paying clients.")
tight knit community that co-maintains a set of components/applications (e.g. "All applications in KDE Games are worked on communally by whomever is currently active in the KDE Games team at the time.")

A team like this will most likely find that a single repo holding the entire module would be most convenient. This would make (for example) applying a fix or new caching model across all applications easier.

set of components that share local libraries and only make sense when released together (e.g. "kdebase-workspace hosts several local, non-BIC libraries shared between KDM, KWin, Plasma-* shells and contains all the base plugins required for a reasonably functioning KDE Workspace.")
downstream kde packagers
KDE bleeding edge users/testers

The situation here should be much the same as before. People using scripts like kdesvnbuild will be able to download and update kde as before. The scripts themselves however will need to be modified to address any new organisation.

Broad cross-module committers (e.g. dfaure and laurent)