[Halld-offline] Offline Software Meeting Minutes, January 20, 2016
marki at jlab.org
Mon Jan 25 14:52:28 EST 2016
Please find the minutes below and at
GlueX Offline Meeting, January 20, 2016, Minutes
* *CMU*: Naomi Jarvis, Mike Staib
* *FIU*: Mahmoud Kamel
* *JLab*: Mark Ito (chair), David Lawrence, Paul Mattione, Dmitry
Romanov, Nathan Sparks, Sascha Somov, Justin Stevens, Simon Taylor,
* *NU*: Sean Dobbs
* *UConn*: James McIntyre
1. *DL1Trigger added*. David led us throughhis email
Trigger bits from both the GTP and the front panel of the TS are now
produced from a JANA factory. Sascha will put together a list of
quasi-permanent trigger bit assignments.
2. *Upgrade to Xerces-C++ done*. Mark flashed hisemail
last Thursday. Builds of JANA, HDDS, and sim-recon against both
3.1.1 and 3.1.2 are available, but the default is 3.1.2.
* Nathan asked about using Xerces-C++ from the various Linux
distributions rather than building our own. Beni reported
difficulty doing this under Ubuntu. CentOS6 is at 3.0.1,
relatively old. We do have the build-our-own thing under control
as well. We concluded there is no pressure to switch, but it is
something to keep in mind.
3. *Compiler Survey Responses In*. Mark told us that most sites report
that they are using GCC 4.4. As a result we should probably delay
allowing developers to use language features only supported by more
4. *Sim-recon 1.9.0 tagged on GitHub*. Mark made the announcement.
Notably it includes the new "curving shower" BCAL code from Tegan.
5. *Paper-based Software Review*. Mark and David reported that Chip
Watson and Graham Heyes are thinking about having a software review
where only written reports will be circulated, no visiting
committee. They have asked for documentation about how we are doing
with respect to previous review recommendations and significant
updates on software progress. They would also like us to update our
computing resource requirement estimates.
6. *Corrupted files on Lustre*. From the Computer Center website:
Due to a hardware failure over the weekend, a small subset of files on
the scientific computing Lustre system were lost. This affects files in
/work, /cache, and /volatile. If your data is affected, file access
attempts will return the error "Cannot send after transport endpoint
shutdown". The scientific computing group is working on automatically
removing the affected files. Users who see this message in the meantime
should remove the files with the "unlink" command, after which each file
can be manually recreated. The Scientific Computing group is working
with the vendor on a long term stability fix for the affected file servers.
Review ofminutes from January 6
Marksent out the proposal
gaps in the sequence of run numbers*to the Collaboration. There was not
a lot of discussion generated. The group putting together sim1 have
decided to go ahead on the assumption that a run 10,000 start is a good
guess for the Spring.
Mark canvased the group for those wishing to give a talk. He expects to
hear from those interested.
RCDB vs. CCDB for Offline Reconstruction/Analysis
Mark introduced the issue of whether the offline analysis should get
constants directly from the RCDB or whether we should copy the constants
to the CCDB and access them from there. There are good arguments on both
sides. Seehis slides
After much discussion, we settled on a two-prong approach:
1. Dmitry will write a C++ API for the RCDB. This is likely essential
for some online applications, but will not become part of sim-recon
2. We will also write some scripts to copy data from the RCDB to the
CCDB and see if any fundamental difficulties reveal themselves.
* This page was last modified on 25 January 2016, at 14:50.
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