MainPage:Nuclear:Summer2018:Software and Computing

⇐ Back to the Main_Page

Hall A/C Software and Computing Studies for Kaon LT and DVCS

Salina Ali & Callum Walton

Network Server Setup at CUA

To-do

• Setup master server

• Install CentOS7 (open source)
• Install root 6.10.06 (most recent version)
• Install PODD software: analyzer 1.6.3 (most recent version) for Hall A and Hall C in different build directories

• Link for Hall A analyzer 1.6.3 Redmine pg, install '.gz' format and untar.
• Link for Hall C analyzer 1.6.3 Redmine pg, install '.gz' format and untar.

• Create a "setup" script like gohana and gohcana with correct environment variables set in path

• Have local root files available either on own computer or file servers to test network server communication with readability

Building and using root 6.10.06 on Linux CentOS7 (Salina)

ROOT is a software used in experimental nuclear physics for data analysis and is C++ based. For more info go here. The commands in this section are written in terminal after the $, so don't type the $ while typing your command in the terminal.

• You can download root two ways: from pre-compiled binaries suited for your OS, or using cmake and building root from the source code. For the source code and pre-compiled binaries go to: root version 6.12.06. These instructions are for the installation from the source.
• Either install the source code (.tar.gz) or use "git clone" to clone the root repository to your directory
• In your terminal, first go to your /usr/local/ directory by doing $ cd /usr/local/
• Then do $ git clone http://github.com/root-project/root.git
• Then go to root directory in /usr/local like $ cd root
• Then do $ git checkout -b v6-12-06 v6-12-06

• Remember to name the unpacked source file, like root-6-12 or whatever, so you wont get confused with other versions or the build directory later.. do this anyway if you don't.
• The "root" or "root-6.12.06" is a directory with all the cmake stuff in it, which will be used to build the source.

• Now you need to make a build directory in /usr/local/ by doing $ mkdir build

• Since you are trying to compile and link the "build" directory to the source, you need this other build directory. This will look like /usr/local/build/

• Now go to your build directory if you weren't already in it $ cd /usr/local/build/ and link to root via cmake by $ cmake /path/to/source/ or $ cmake /usr/local/root/

• Note: if your source isn't in a directory named "root" then change it to the source directory name e.g. if it was named root6-12-06 then do $ cmake /usr/local/root6-12-06/

• Now build it: $ cmake --build . -- -jN

• where N is the number of cores available to speed up the building. This will take a while regardless of the short cut.

• After the install is done, and nothing is broken/no error messages, test if root is working by going to your build directory and doing

• (for bash shell) $ . bin/thisroot.sh
• (for csh shell) $ source /usr/local/build/bin/thisroot.sh

• Start a root interactive session by doing $ root
• You should probably change the directory name of "build" to root6.12.06 or just root. So now root will be in /usr/local/root/ or /usr/local/root6.12.06
• For a more permanent change, edit the login file, either .bash_profile on Mac OS X or .bashrc on linux by doing

• For text editor vim: vim ~/.bash_profile OR vim ~/.bashrc
• For text editor emacs: emacs ~/.bash_profile OR emacs ~/.bashrc

• Then add the lines, usually toward the bottom (applies to both bash_profile on mac and linux):

$ export ROOTSYS=/usr/local/root $ export PATH=$ROOTSYS/bin:$PATH $ export PYTHONDIR=$ROOTSYS/bindings/pyroot

Installing analyzer

• https://hallcweb.jlab.org/wiki/index.php/ROOT_Analyzer/Compiling

Computing using PODD/Hall A & C analyzer

Link for information for Hall C Analyzer: hcana info Link for information for Hall A analyzer: Hall A analyzer info

Computing Workshop at JLab from June 25-26, 2018: Hall A/C Computing Workshop Info and Registration