* Re: [gentoo-dev] Distribuited build
@ 2002-06-09 21:17 99% ` Marko Mikulicic
0 siblings, 0 replies; 1+ results
From: Marko Mikulicic @ 2002-06-09 21:17 UTC (permalink / raw
To: gentoo-dev
Paul de Vrieze wrote:
> On Sunday 09 June 2002 22:31, Marko Mikulicic wrote
>
>
> While I didn't test it yet, openmosix could be a solution for better
> utilization of your computing power. Parallel dependencies are sometimes
> difficult (cross dependencies), also it would require tweaks to emerge
>
Well, I delibertely left out openmosix because it is automatically
supported with make -j n. However there is a big issue with it:
Openmosix process migration can distribute the load of a single system
through a cluster but if you install n packages they are build in
sequence so that only compiles from a single build get eventually
distributed. And it's even worst when some packages have parallel build
disabled.
Moreover openmosix is not applicable in a etherogeneous network, whith
freebsd, linux, win32, tru64, linux-alpha machines, while distcc can
execute cross-compilers on every architecture (windows too).
and openmosix requires all to run a special kernel, administrative
issues,.... I think that something lighter is needed, for it to be
really useful. I have access to a LAN with 16 PIV 1.5Gh but with any
kindof linux distros, versions, libraries, users. The only
administrative power I have is to run niced jobs and a good amount of
ram.
However the problem is not openmosix vs. distcc, while both are
completely transparent with portage and both have the same problem:
sequential builds.
As for cross dependencies, how does portage handle the now? There could
a queue for each pending build where dependent build are added.
RDEPEND does not conflict with paralell builds.
I agree this would require tweaks to emerge. I think it's not
urgent in portage1, but it could go in portage2, which with it's added
performance could resolve this kind of dependence in acceptable time.
What do you think ?
Marko
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2002-06-09 20:31 [gentoo-dev] Distribuited build Marko Mikulicic
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2002-06-09 21:17 99% ` Marko Mikulicic
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