[devel at bb.net] Parallel substantiation of latent build slaves

[Christopher J. Morrone]

Hello,

We are using buildbot in AWS using EC2 latent slaves.  Overall, we are
quite happy with buildbot.  One area that we would like to improve is
the substantiation of the latent slaves.  Right now, it looks like the
slaves are all substantiated completely sequentially, and that can be
very time consuming.

With our setup, we currently have five builders, each with three EC2
latent slaves that are not shared with the other builders.  It would
seem like the latent slaves could be substantiated in parallel, and the
code at the latent slave level looks like it was designed to allow that.
 But somewhere in the higher levels of buildbot the substantions are
sequentialized.

I have googled around and searched the builbot bug tracker, but I
haven't been able to find any reference to this topic.  If I've failed
to locate the right bug or conversation, please point me in the right
direction.

Is there any plan to work on this?  If not, does anyone have any
suggestions for me about what areas in buildbot I would need to work on
make substantiation happen in parallel?

Thanks,
Chris