[Buildbot-devel] Concurrent builds on different slaves

[Jean-Paul Calderone]

Hey,

I've just added a new slave to my existing master configuration.  I tried
to configure the slave to run all the builds another slave which already
existed is running.

Before I had something like this in my master.cfg:

    oneCPULock = SlaveLock('cpu-1', maxCount=1)

    slave = {
        'slavenames': ['slave-foo'],
        'locks': [oneCPULock]}

    builderA = slave.copy()
    builderA.update({
              'name': "name-bar",
              'builddir': "dir-bar",
              'factory': SomeBuildFactory(),
              'category': 'supported'})
    builders.append(builderA)

    builderB = slave.copy()
    builderB.update({
              'name': "name-bar",
              'builddir': "dir-bar",
              'factory': SomeBuildFactory(),
              'category': 'supported'})
    builders.append(builderB)

Naively, I thought I could add my new slave by changing the definition of
`slave´ to this:

    slave = {
        'slavenames': ['slave-foo', 'slave-bar'],
        'locks': [oneCPULock]}

However, when I do this, builds across the two builders seem to end up
serialized instead of parallelised.  However, just to make things complicated,
*some* builds will run in parallel.  I cannot discern what pattern these
builds follow, though.

What's up?

Jean-Paul