Solid Software

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introduction

Here is the information hub for the SoLID software for physics study.

Physics event generation is a collection of independent software packages.

Detector simulation is based on Geant4 based simulation framework GEMC http://gemc.jlab.org

The instruction for installation and how to use do event generation, simulation and reconstruction are listed below.

quick demo

This is the quickest way to run the simulation in graphic mode on jlab ifarm machine with the official installation. Use it to get a feeling how it works.

ssh -XY your_lab_username@ifarm          (login with Xwindow forwarding enabled)
xclock &                                 (test if Xwindow forwarding works)                                            
source /group/solid/solid_svn/set_solid        (setup env with official installation framework and official repo)
cd $SoLID_GEMC/script                      (enter the official repo script dir)
solid_gemc solid_SIDIS_He3_full.gcard          (two graphic windows should appear, one has control and one shows the detector)
solid_gemc solid_SIDIS_He3_full.gcard -USE_GUI=0 (batch mode, information shows in terminal)

If you have any problem or it runs very slow, go to Solid_Software#on_ifarm

How to use it

general instruction

We have a unified framework of installing GEMC and all their dependences

all SoLID software based on the framework is in SoLID repository

You need both the framework and SoLID repository to use the software

  • installation of framework
    • The framework use environmental variable JLAB_ROOT to control installation path and JLAB_VERSION to control version
    • See detailed instruction for installation of framework
  • installation of SoLID repository
    • SoLID repository is in SVN, everyone has read right, only jlab account within "solid" group can write
    • checkout by "svn co https://jlabsvn.jlab.org/svnroot/solid solid_svn"
    • access its WebSVN interface at https://jlabsvn.jlab.org/solid
    • two ways to get auto notification about any change to SVN, use a graphic SVN client ("kdesvn" is good) or use RSS feed on the Websvn interface
    • it directory structure
      • "evgen", some event generators, (the others are in other repositories, see event generation section for details)
      • "solid_gemc", GEMC 1.x related files for SoLID simulation
      • "solid_gemc2", GEMC 2.x related files for SoLID simulation
      • "subsystem" for individual subsystems
      • "study" for studies involving different subsystems
    • warning as of 2018 if you are trying to check out a SVN repo at anywhere under /lustre disk after login into ifarm (alias to ifarm1401 and ifarm1402), it will fail with an error due a SVN 1.7 client and NFS 3 conflict. Computer Center knows the problem and is looking into a long term solution. The temp solution is to do any SVN operation from ifarm1101 which has SVN 1.6

default version and official location

(as in 2017/05)

The default framework version is JLAB_VERSION=1.3

The default system for the default framework is CentOS7.2.1511-x86_64 on ifarm.jlab.org (alias to ifarm1401 and ifarm1402)

Linux_CentOS6.5-x86_64-gcc4.4.7 and Linux_RedHat6.9-x86_64-gcc4.4.7 are also supported for older system

(The framework was tested on many platforms, but for our use, it's only fully tested on systems similar to jlab ifarm system)

The official framework installation on jlab ifarm and jlab internal computers is at /group/solid/apps/jlab_root

The official SoLID repository checkout is at /group/solid/solid_svn, it will be be kept in sync with latest SVN.

(You should have your own checkout if you want to make any changes)

step by step guide

This is a step by step guide to setup and run simulation etc.

make sure you meet the requirement before you do anything

requirement

Do following before installation, updating and running the code

  • check "echo $SHELL" to check if you are using tcsh shell. If it's not your default shell after login, first open a clean terminal and run "tcsh". In general, bash would work, but tcsh is default at jlab and what the instruction uses.
  • clean your env variables. For example, remove your environment variable setup in your login script like .cshrc and .login or disable them temporally by "mv .cshrc cshrc" and "mv .login login". This is to avoid conflict from other software environment variables. Vice versa, don't put our environment variables into your login script either, set it up every time you login a terminal instead
  • If you are running it in graphical mode on remote machines, make sure to turn on X11 forwarding by "ssh -X" or "ssh -Y" when connecting to remote machines. If you local computer is windows, you need to turn on X11 forwarding in putty's option and have a Xwindow server like Xming or VcXsrv running. test if "xclock" or "xterm" will work first

on ifarm

This allow users to run it on ifarm and test code before submitting jobs to jlab farm. You don't need to install the framework and you can choose to use official repo or your own repo.

if you can't ssh into ifarm, ask jlab computer center helpdesk@jlab.org to allow your account access ifarm
(additional requirement for graphic mode)
If you want to run it on ifarm in graphic mode, see help at [graphic mode on ifarm] first. 
If you want to run it on ifarm in batch mode without graphic, simply ssh into ifarm, then go to next step
(use official installation of framework with official repo which you can't modify)
source /group/solid/solid_svn/set_solid        
(use official installation of framework with your repo so that you can make changes) 
cd your_choice_of_solid_repo_path
svn co https://jlabsvn.jlab.org/svnroot/solid solid_svn  (checkout the repo)
cd solid_svn
cp set_solid set_solid_mine                         (create your copy of env script)    
edit set_solid_mine by following the instruction within, you only need to change $SoLID_GEMC
source set_solid_mine  (setup env with your repo)
cd $SoLID_GEMC/source/$GEMC_VERSION    (enter the source dir for solid_gemc)
scons OPT=1                          (compile solid_gemc) 
source set_solid_mine                  (optional step if solid_gemc can't be found in default PATH. if it does work for the first time, try it in a clean terminal)
(now you can run it)
cd $SoLID_GEMC/script                        (enter the script dir) 
solid_gemc solid_SIDIS_He3_full.gcard            (graphic mode, one windows has control and the other shows the detector)
solid_gemc solid_SIDIS_He3_full.gcard -USE_GUI=0 (batch mode, information shows in terminal)

on jlab internal machine

If your machine is on jlab internal network, you can use the pre-compiled framework shared over jlab network.

more /etc/redhat-release       (check if your machine is supported Solid_Software#default_version_and_official_location, otherwise you need to change or update to the support system)
                               
ls /group/solid/apps/jlab_root (check if you can access the pre-compiled framework)
(if you don't have access, you have two choices
   1. ask jlab computer center helpdesk@jlab.org to add it for your machine 
   2. use sshfs  (install fuse_sshfs after turn on EPEL repo by following instruction here)
      su -l
      mkdir /group
      chown your_jlab_username.your_jlab_group /group
      exit
      sshfs -o workaround=all ifarm:/u/group /group
 )     
(use official installation of framework with your repo so that you can make changes) 
cd your_choice_of_solid_repo_path
svn co https://jlabsvn.jlab.org/svnroot/solid solid_svn  (checkout the repo)
cd solid_svn
cp set_solid set_solid_mine                         (create your copy of env script)    
edit set_solid_mine by following the instruction within, you only need to change SoLID_GEMC
source set_solid_mine  (setup env with your repo)
cd $SoLID_GEMC/source/$GEMC_VERSION    (enter the source dir for solid_gemc)
scons OPT=1                          (compile solid_gemc) 
source set_solid_mine                  (optional step if solid_gemc can't be found in default PATH. if it does work for the first time, try it in a clean terminal)
(now you can run it)
cd $SoLID_GEMC/script                        (enter the script dir) 
solid_gemc solid_SIDIS_He3_full.gcard            (graphic mode, one windows has control and the other shows the detector)
solid_gemc solid_SIDIS_He3_full.gcard -USE_GUI=0 (batch mode, information shows in terminal)

If you have any problem running official installation of framework, double check if your system is supported. It could be some needed packages were not installed on your local machine and you need to install them as root. refer to "prepare for installation" at [1]

If you have any problem running official installation of framework, go to Solid_Software#on_any_machine

on any machine

This gives you maximum freedom to use your installation of framework and your repo

install the default version of framework by following installation instruction at installation of framework
cd your_choice_of_solid_repo_path
svn co https://jlabsvn.jlab.org/svnroot/solid solid_svn  (checkout the repo)
cd solid_svn
cp set_solid set_solid_mine                         (create your copy of env script)    
edit set_solid_mine by following the instruction within, you need to change SoLID_GEMC and JLAB_ROOT
source set_solid_mine  (setup env with your repo)
Check if the version you installed need these fixes by following Jlab_software_tmp_fix
cd $SoLID_GEMC/source/$GEMC_VERSION    (enter the source dir for solid_gemc)
scons OPT=1                          (compile solid_gemc) 
source set_solid_mine                  (optional step if solid_gemc can't be found in default PATH. if it does work for the first time, try it in a clean terminal)
(now you can run it)
cd $SoLID_GEMC/script                        (enter the script dir) 
solid_gemc solid_SIDIS_He3_full.gcard            (graphic mode, one windows has control and the other shows the detector)
solid_gemc solid_SIDIS_He3_full.gcard -USE_GUI=0 (batch mode, information shows in terminal)

on container

SoLID container

Coordinate System

SoLID uses the coordinate system below in lab frame for event generator output, detector arrangement and reconstruction

electron beam goes along +z axis and at x=0,y=0
The solenoid coil center at the origin (x=0,y=0,z=0),axis along electron beam
y axis is vertical and +y pointing up relative to the ground
x axis is horizontal and +x pointing left when riding the electron beam
+x axis has phi angle 0 deg,  +y axis has phi angle 90 deg
phi angle coverage is from -180 to 180 which can be obtain by atan2(y,x)*180/Pi or TVector3.Phi()*180/Pi

Physics Event Generation

Detector Simulation

Event Reconstruction

Study

Info

emaillist

proxy

To access outside site from ifarm

    setenv http_proxy http://jprox.jlab.org:8081 
    setenv https_proxy https://jprox.jlab.org:8081

linux group

SoLID Linux group is "12gev_solid"

check your account groups by command "groups username" or "id username"

Please ask Ole <ole at jlab.org> to add your jlab account to the group if you want to use SoLID related computing resource at jlab.

Batch Farm Project

jobs should go to the 'solid' project

disk space and access rule

Disk Space

/group/solid long term, has backup 200GB for shared code, only write to here when you ask SoLID software coordinator
/mss/halla/solid permanent, on tape no limit
/work/halla/solid long term, but has NO backup 5TB for small size file, not for data
/cache/halla/solid write through cache for mss, short term  ??? quota ??? reserved for large size file with auto backup to tape
/volatile/halla/solid short term 30TB quota 15TB reserved for large size file which you can afford to lose any time

check status under "File System" at https://scicomp.jlab.org (used space is not very up2date, try to run "jvolatile info a-solid" to get latest size)

reference https://scicomp.jlab.org/docs/node/6 and https://scicomp.jlab.org/docs/node/28

Auto deletion rule

On cache and volatile, there are expected to have an expiration date of six months. Also older files will be auto deleted once quota is exceeded.

This is not a problem for cache because all files are backup on tape.

But this quota exceeding auto deletion is very dangerous for volatile because files will be deleted with no warning even when they are not very old to make room refer to [2]

tape use rule

mkdir sure your files below to group 12gev_solid group before backup

jput and jmirror are always safe to use for backup to tape directly.

Be very careful if you are plan to use write through cache by putting file on cache first and rely on auto back to happen because this take time for the back to happen and some file won't be backup automatically. read this

tape location /mss/halla/solid/ is organized as following
"backup" for special backup
"sim" for SoLID full simulation
"physics"  and its sub dir for files shared among various physics programs
"subsystem"  and its sub dir for files shared among various subsystems
"user", for any one's personal SoLID related file
Ask Zhiwen Zhao if you want add new dir
Ask computer center if you want to move files or dir around
use a command like this to find out the size of certain dir on tape, the output is a number in GB
find /mss/halla/solid/backup/ -type f -exec grep size= {} \; | awk -F= '{ a+= $2 } END {print a/1024^3}'

file ownership

You must belong to the group 12gev_solid for access, ask "Ole at jlab.org" to add you.

To avoid disk quota problems, please make sure that all files that you place in the SoLID directories are owned by Linux group 12gev_solid. If you've already created files that have the wrong group, just change the group ID of your directory and all its files and subdirectories to the correct one. You only should have to do this once:

chgrp -R 12gev_solid your-directory

To make this happen automatically for all newly created files in this directory, set the sgid bit on it:

chmod g+s your-directory

Better yet, set this bit for all subdirectories as well:

find your-directory -type d -exec chmod g+s {} \;

Again, you should only have to do this once.

Additionally, to reduce the chance of file access problems, every time you log in and before starting work in SoLID disk areas, switch your effective group ID to 12gev_solid:

newgrp 12gev_solid

Exit from the shell when done; that will return you to where you were before issuing the newgrp command.

old simulation software (for record keeping only, don't use it!)

  • SoLID GEMC 1.x (simulation in GEANT4 with GEMC 1.x, used for later proposals and pCDR in 2014)