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What Lynn does » History » Version 48

Joe Boyd, 12/10/2019 09:44 AM

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h1. What Lynn does
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{{TOC}}
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h2. Build "third party" ups products as needed for art and larsoft 
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<pre>
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For immediate term using old methods Chris Green will have to take care of this,  Jim A should be the one to tell these people this but in the future using SPACK here are some examples of people that could maybe take these pieces
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  * ROOT: Philippe / Physics and Data Simulation.
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  * GENIE: Robert Hatcher / Neutrino Simulation.
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  * GEANT4: Krzysztof / Physics and Detector Simulation.
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  * PostGresQL, Psycopg,  SQLite, MySQL, MariaDB: Scientific Database Applications.
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  * nucondb, ifbeam, ifdhc, ifdh-art, etc. (and unique dependencies): Compute
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    Services Tools.
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  * PyTorch, libtorch, TensorFlow, Eigen, Caffe (legacy): Algorithms for
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    Reconstruction and Analysis.
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</pre>
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* We have a [[build-framework:|defined procedure]] that uses a number of scriptlets found in the ssibuildshims product.
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* Each product has a tiny redmine repository for the build and bootstrap scripts.
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** Scripts include autobuild.sh, bootstrap.sh, build_xxx.sh, and usually ups/xxx.table, where xxx is the product name.
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** We sometimes need patch files.
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** Other scripts are occasionally included, such as bootstrap_datasets.sh for geant4.
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** We tag these repositories with the product version.
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* To ensure reproducible builds, we only build from tagged releases.  In rare cases, we use a commit hash.
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* We require that the source code be captured in a source code tarball for reproducible builds.
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* We bootstrap and run local test builds for the supported compiler options.  This is a rapid turnaround development step.
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** Whenever possible, we run unit tests as part of the build procedure and require that these tests pass.
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* Once everything looks good, the source code tarball is uploaded to SciSoft.
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* Also provide help to people attempting to make their own ups products.
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h2.  Build art releases after they are tagged.
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<pre>
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SciSoft team would take this over
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critic distribution includes everything
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</pre>
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* Kyle sends around an email to the SciSoft Team when a release is tagged.
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* Update information in build-framework/CMakeLists.txt
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** There are multiple branches for different product configurations
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* Run cmake to get the new build configuration files.
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* Check the new config files.
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** Always compare against the previous release.
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* If they are OK, use copyToSciSoft to install ONLY the appropriate build configuration files on SciSoft.  There are html files for each release that also need to be installed.
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** canvas
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** art
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** gallery
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** critic
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* Start a Jenkins build
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** https://buildmaster.fnal.gov/buildmaster/view/Art/job/critic-all/
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** The build needs two iterations.  First for python 2 (the LABEL field is empty) and then a second pass with LABEL set to py3.
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* Sometimes there are problems with the build.
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** Investigate and fix.
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** A local test build is sometimes helpful, depending on the problem.
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* Once the build has completed successfully, download the tarballs locally and then upload them to SciSoft.
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** Work in an empty directory
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** copyFromJenkins -N -q c2 -q c7 -q e17 -q e19 critic-all
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** copyToSciSoft *
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h2. Update other products to use the appropriate release of art (SciSoft team or experiments, see bullet notes)
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* artdaq_core (This should go to the artdaq group -- Eric Flumerfelt, Lynn says we just need a tag)
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** Owned by the artdaq group
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** This product is designed to build against several different releases of art, as reflected in the generated table file.
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** If the head of develop matches the latest tag, then use git flow to tag against the head of develop.  Otherwise make a release branch against the latest tag and edit product deps.
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** We only edit ups/product_deps to make a new release.
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* ifdh_art (SciSoft)
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** This is the ifdh service developed by Marc Mengel at the request of the art team.
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** ifdh_art can build against several different releases of art.
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** ifdh_art is updated when libwda or ifdhc is updated or if it needs to recognize a new release of art.
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* nutools (Robert Hatcher?)
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** This product is owned by NOvA
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** However, larsoft uses it extensively and sometimes makes contributions to the code.
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** Any changes beyond those required by a new release of art, genie, or geant4 must be approved.
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h2. Build mu distributions ( mu2e should take this over)
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* The mu distribution is basically an art distribution with a few additional products.
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* The distribution is built when requested.
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* Found on a branch of build-framework
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h2. Build nutools releases and the nu or nulite distributions. (Erica will talk to Laura Fields about Robert Hatcher doing this)
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* Both NOvA and LArSoft can drive the need for a new release of nutools.
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** NOvA uses the full nu distribution.
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** LArSoft now uses the nulite distribution which ignores packages that are NOvA specific.
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* nutools has been split into modular components.
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** This was a staged deployment.  As of nutools v3_05_00, only the CRY interface remains in nutools.
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** The nutools suite now contains nusimdata, nugen, nug4, nuevdb, nurandom, and nutools.
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** The build configure scripts are now generated from templates in nutools/bundle.
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h2. LArSoft release management (SciSoft team plus experiment activity on patch releases)
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* Note that the move to github and pull requests will change this workflow.
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* Advise and collect information for each weekly release.
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** I am often the first point of contact for code changes.
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** Sometimes push back about proposed changes.
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* Send notices that the release is about to start.
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* Make a test build with larsoft and all the experiment code.
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** From long experience, if there is more than one set of feature branches to merge, each set must be tested sequentially.
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** While this could be done via CI, it is currently more efficient to test on woof.  Especially since overlapping feature branches must sometimes be tested.
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** We do encourage anyone submitting a feature branch to run the CI themselves.
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* We work on a temporary release branch.
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* Once the tests are complete and successful, update the release versions for those packages which will be changing and then tag.
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* The tag is merged with master, but not with develop. 
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** Merging with develop before the tagged release is available on cvmfs causes all kinds of problems. 
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* Build on Jenkins.  Sometimes we find problems during this step.  We move the tag if necessary when resolving problems.
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* Once the build is complete, we finalize the release.
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** pull the tarballs from Jenkins and upload them to SciSoft
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** install the release on cvmfs
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** For macOS building, we install the c2 build on /grid/fermiapp/products/larsoft
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** make a cross package tag
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** make release notes
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** final merge with develop
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** send an announcement
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* The procedure is described in detail at [[larsoft:How_to_tag_and_build_a_LArSoft_vx_yy_zz_release]]
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** Although it is tempting to take shortcuts, the procedure is designed to allow the release manager to recover from various problems that may arise.  Taking shortcuts removes those safeguards.
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h2.  support various infrastructure products (SciSoft team)
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* cetbuildtools and mrb
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** both products were originally developed by me, but have significant contributions from others
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** We have provided cetmodules for use within spack and are contemplating a move across the board from cetbuildtools to cetmodules.  Details need to be considered.
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* larreltools
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** Replaces laradmin
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** Contains scripts used to build regular and patch releases of larsoft
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* larutils
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** The larsoft build scripts used on Jenkins reside in larutils
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* artutilscripts
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** The build scripts used when building art, nutools, etc. on Jenkins reside in artutilscripts. 
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** This is also where buildFW, pullProducts, copyFromJenkins, copyToSciSoft, etc. are found.
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* laradmin
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** This is now only of archival interest
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** It contains the record of various larsoft migrations.
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h2. SciSoft
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* approve requests for read-write access
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** The possibility exists for someone to accidentally remove or overwrite products.
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** For this reason, we use nfs4 groups to limit read-write access to necessary directories.
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** Some members of the SciSoft team have read-write access to all of SciSoft.
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* copy files to pnfs for archiving
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** There is a procedure, but it is slow and not automatic.
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h2. spack
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* I attempt to help with the spack development, but this takes a back seat to the other efforts.
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h2. heppdt (mu2e should take this over, Kutschke)
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* This is a legacy product that was spun off as a C++ replacement for part of the original stdhep.
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* It is still in use by mu2e.
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h2. Mailing lists
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* owner/manager of several mailing lists
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** many are unused and can be retired
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h2. CLHEP maintenance and support (someone at CERN)
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* I have been the main point person for CLHEP bug fixes.
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* Support will be passed to CERN.
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h2. system management
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* Still provide backup support for oink.  Rare that I do anything.
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* detsim.fnal.gov
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** Now supported by CCD