[Halld-offline] GlueX Software build for JLab CentOS 7.7
marki at jlab.org
Fri Dec 6 16:50:37 EST 2019
The JLab Computer Center recently deployed some new farm nodes running
CentOS 7.7. See this announcement
for some of the details.
Our pre-existing build at JLab on the older CentOS 7.2 distribution is
not compatible with the new nodes. It should be, but for a variety of
reasons, it is not. See below for more on this. For this reason, I have
just done a complete, independent build of our software stack on 7.7.
There is also a new version of build_scripts that sets a BMS_OSNAME that
distinguishes between the old CentOS 7 and the new CentOS 7. The new
This will be set automatically if you use Build Scripts to set-up your
environment. In that case no user action is necessary to use the new
nodes. Furthermore, this should have no impact on any builds done
outside of the JLab farm/ifarm cluster.
The main issue causing the conflict is a non-standard version of MySQL
on the 7.2 nodes. That version is built into many of our binary
executables and to make them run under 7.7 would require the same
non-standard MySQL install on the new nodes, which we do not want.
Better to have a complete build in the new, more standard environment.
In addition Python is now coming from /usr/bin, not /apps/bin as it was
under 7.2, and Cmake3 is coming from /usr/bin and not
/apps/cmake/cmake-3.5.1/bin. This is also manifestly in the direction of
a more standard environment. If /apps/bin is in your path on CentOS 7.7
on the ifarm at JLab, you might want to be careful.
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