[Halld-offline] Offline Software Meeting Minutes, January 6, 2016
marki at jlab.org
Fri Jan 8 14:57:57 EST 2016
Find the minutes at
GlueX Offline Meeting, January 6, 2016
* *CMU*: Curtis Meyer
* *FIU*: Mahmoud Kamel
* *JLab*: Amber Boehnlein, Eugene Chudakov, Mark Ito (chair), David
Lawrence, Paul Mattione, Dmitry Romanov, Nathan Sparks, Simon
Taylor, Beni Zihlmann
* *NU*: Sean Dobbs
* *UConn*: James McIntyre
* New sim-recon release: 1.8.0
It came out on December 11. I uses the latest versions of JANA and CCDB.
* ifarm1101 out of the rotation
This was the last of the CentOS 6.2 ifarm nodes. Logins have been
Review ofminutes from December 9
Sean raised the issue of deleting old pull-request builds last time.
Mark implemented auto-deletion of builds older than a month via cron job.
HEP Software Foundation
Amber gave a summary of an effort to collect information and encourage
collaboration on software systems among high-energy and nuclear physics
collaborations. The approach is community-based. Seeher slides
<https://halldweb.jlab.org/talks/2016/SciCompNews.pptx>for details. The
Foundation has a website athttp://hepsoftwarefoundation.org/. The
"knowledge base" is hosted athttp://hepsoftware.org/and Amber has
already added GlueX. More links are planned.
She highlighted the Packaging Working Group, which is collecting
information on systems for software distribution within collaborations.
She encouraged interested parties to subscribe to the mailing list,
hep-sf-packaging-wg at googlegroups.com .
She also told us about Exascale-2015, a project aiming at a machine of
hundreds of petaflops. There will be a workshop this summer to discuss
nuclear physics applications including experimental tasks.
Paul gave the report. He showed us results from the most recent
launches, just before the holidays. He did a launch on Spring 15 and
Fall 15 data sets. He pointed us to theRun Browser, Run 4319
an example. One can clearly pi zeros in the BCAL.
The transition from the old offline monitoring database to the RCDB is
in progress. Some info in the browser is compromised as a result. Dmitry
pointed out some of the features of the RCDB data viewer
David has succeeded in build a new version of the CPP simulation using
Geant 4.10.2 and Clang 3.7.0. He reports that the problem with
multi-threaded processing he had seen with previous Geant versions has
been fixed. Event rate scales with number of threads. He sees some small
differences between multi-threaded enabled code run with one thread
versus single-threaded code.
He has added a new generator to sim-recon. It produces muon pairs with a
coherent photon beam, including polarization effects. The pair
productions code was adopted from Geant4 and the coherent photon
generator adopted from Richard Jones's code.
Upgrade Xerces C++ from 3.1.1 to 3.1.2
Version 3.1.2 of the Xerces C++ librarycame out last March
<https://xerces.apache.org/xerces-c/releases_plan.html>. Mark flashed
Mark has built it on all of he platforms and tested it on RHEL7 with the
b1pi test suite. Nathan has been using this version for his work for
months now. We will upgrade to this version in the near future.
More generally, we had a discussion on how to handle future version
upgrades for the low-level software packages that we rely on. Upgrades
can be disruptive since they force everyone to build a new version of
the package itself and recompile all packages that depend on it.
During the discussion we spent some time on the plan for going from GCC
4.4 to 4.8. GCC 4.4 is the default on RHEL/CentOS 6, which appears to be
common throughout the collaboration. The latest Geant4 and ROOT6 both
require 4.8 at least.
Curtis suggested we poll the collaboration about which compilers people
are using at their home institutions.
As far as implementing a change, David suggested making decisions at
Offline meetings, issuing an announcement in advance of any change
giving people time to object.
Review ofrecent pull requests
We skimmed through the list going back to early December.
Data Challenge 3
Mark has generated the fake raw data using recent software, 5000 files
of 10 GB each. This was done just before the break.
Future Commissioning Simulations
Mark generated a hundred jobs using Tegan's new BCAL code at Sean's
request. Sean will look over the results.
New HDPM Documentation
Nathan has transitioned to using the GitHub built-in wiki for Hall D
Package Manager documentation. Find it
* This page was last modified on 8 January 2016, at 14:55.
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