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Re: CentOS binary packages, etc.

On Mon, Aug 29, 2016 at 09:11:50AM -0500, Jason Bacon wrote:
> 2)    Roughly how long does it take to do a bulk build of the entire tree on
> a single high-end server?  I was thinking of doing builds on one of our
> production clusters, but I'm leaning against it due to some issues with
> leakage of Yum packages into certain builds.  I think it would be safer to
> do the builds on a dedicated server with a minimal CentOS installation.

Define high-end server :) I have a ~2 year old dual Xeon (8 "real" cores
in total) with 64GB RAM that I use for the clang bulk builds of current.
That can do a full build in about 2 days, give or take. With enough RAM,
you can do a build entirely within tmpfs for the non-persistent data.

I wouldn't worry too much about the base installation in the cluster,
but follow an approach similar to what I am using for all my builds.
Essentially, prepare a reasonable minimalistic CentOS installation,
including gcc and gfortran. Create a tarball from what and use it to
chroots. You'll likely need some additional mount points for /sys, /proc
and /dev, but you will end up with an image that is nicely decoupled
from the actual base installation.

Feel free to contact me (off-list) for further details.


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