[Buildbot-devel] Inefficiency with multiple slaves and slavelock

Fri Jun 23 06:16:31 UTC 2006

Currently I have a setup where say 2 builders(A and B) are attached to the same 2 slaves(C and D) and has a slavelock so that only one build is run on a slave at any given time. So builder A has slaves C,D attached and builder B has slaves C,D attached to it. So if I force a build on builder A, then slave C will start the build as well as obtain the slave lock. Now if I force a build on builder B while builder A is building, then builder B trys to obtain slave C. Since slave C is locked by builder A, it just waits until it is free while slave D is free to do a build. I believe the builder should be able to detect a free slave by going through the slave list and try to obtain the lock. 

-----Original Message-----
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Sent: Thu 6/22/2006 12:10 PM
To: buildbot-devel at lists.sourceforge.net
Subject: Buildbot-devel Digest, Vol 2, Issue 19

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Today's Topics:

   1. Re: OpenWengo Code Camp participation proposal (Julien Gilli)

----------------------------------------------------------------------

Message: 1
Date: Wed, 21 Jun 2006 21:33:06 +0200
From: "Julien Gilli" <julien.gilli at wengo.fr>
Subject: Re: [Buildbot-devel] OpenWengo Code Camp participation
	proposal
To: "Brian Warner" <warner-buildbot at lothar.com>
Cc: buildbot-devel at lists.sourceforge.net
Message-ID:
	<bbad6ebb0606211233rb506263qff39ea0b5cc19c64 at mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

Hello,

On 6/21/06, Brian Warner <warner-buildbot at lothar.com> wrote:
>
> Hi all.. I've been out of town for a few days, sorry I didn't respond to
> this
> earlier.

No problem. I kept sending you e-mails because we were really excited about
sponsoring a buildbot project. I'm really happy that it is now possible :-).

None of Google's SoC students ended up doing a Buildbot project, so the
> field
> is wide open.

Ok, that's not great because it would have been pretty cool to have GSoC
students working on buildbot too, but it eases our task..

The SQL backend is an excellent choice, as everybody wants it
> (starting with me!), SQL is one of those things that a lot of students
> know
> and are taught these days, and it's probably a reasonable scope for
> completion over the summer. Some other projects I mentioned back in my
> 6-May-2006 email include Problem Tracking, better tracking of build
> metrics
> like memory footprint and code size, some sort of code-coverage display,
> better IM clients, and maybe a Trac plugin. A number of these will be a
> lot
> easier to write once the SQL backend is in place.
>
> Also take a look at the sf.net project page in the "Enhancement Request"
> section[1], as there are some good project ideas in there. Some of those
> are
> probably a bit small for a summer project, but they might give you some
> inspiration. Please post any ideas you have here so the user community can
> jump in on which features are in the highest demand.

Ok. What I suggest is that we have some brainstorming sesssion ending
tomorrow 12:00 PM CEST, since it's supposed to be the starting point for
OpenWengo Code Camp. The SQL backend seems to be the starting point for many
interesting things, like being able to query Buildbot's "datas" easily from
anywhere, but I wouldn't like to limit the debate to this.

I don't know which timezone you (Brian) live in, but could we setup a
buildbot IRC channel somewhere and invite everyone here to chat about the
subject that would benefit the most to the project?

What do you think about this?

And of course I'm eager and willing to help out any students who take on one
> of these projects. The better communication we have with anybody writing
> buildbot code, the better the chances we can get that code into the trunk
> where everyone can take advantage of it.
>

Great! Let's go ahead, and hope for a nice contribution to buildbot!

Best regards,
-- 
Julien Gilli
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