SG ATLAS software installation

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Dear GIMS, 

We have tested succesfully the procedure for ATLAS software installation. 

First, you should know that atlas software environment can be installed on many kinds of (Linux) machines, not only running SL 3.0.x and LCG 2_4_0.

I guess people from physics departments may be interested in local manual installation via pacman (may be performed by non-root user). Site administrators may skip this because for sites there is a different procedure.

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The page about pacman (software used to install atlas environment) is: http://physics.bu.edu/pacman/

Following the instructions, pacman installs without troubles.

To install pacman, download and then

tar zxvf pacman-latest.tar.gz
cd pacman-latest.tar.gz
cd pacman-3.11/
ls
vi README.html
. setup.sh


By these commands you can upgrade the pacman you just installed:

pacman -get Pacman:Pacman
pacman -update-check

which is useful.

Now you source again 

. setup.sh

and then your proceed to ATLAS installation:

cd ..
mkdir atlasinst
      ^^^^^^^^
Directory where you plan to install


export release=10.0.1
               ^^^^^^
This is the version used in production, newer versions are also available.

export PACMAN_INSTALLATION=DIR_WHERE_YOU_INSTALLED_PACMAN

cd atlasinst/
pacman -get ${ATLAS}:${release}/AtlasRelease-slc3_ia32-opt -trust-all-caches

In theory this command should install the ATLAS environment. 

It downloads several GB of data.

------------------------------------------------
Site administrators follow the procedure I will describe here. It is relevant for sites in EGEE production only. 


The requirement for supporting ATLAS jobs is that you need 1 GB RAM per CPU (so dual machines with 1 GB total are a bit off) and 10 GB of 
scratch space on WNs (I think again it is per CPU or per job). I guess it can be arranged to have always at most one ATLAS job per WN via maui, but I never had such problem.

You can go the web page


https://atlas-install.roma1.infn.it/atlas_install/protected/rai.php

and using your certificate you submit a request for installation. 
Note that using Netscape for this website is not recommended. Konqueror didn't work either. 
In the last few days there was some php error being displayed, but today 
it disappeared. 

The production version of ATLAS environment is 10.0.1. You can install more than one version. Each version requires about 10 GB on the shared 
directory which is used for software installation - usually /opt/exp_soft or /opt/exp_software.

If you have any questions or problems, you can contact the person responsible for software installation and for new sites - Alessandro De Salvo.


Emanouil Atanassov
emanouil@parallel.bas.bg
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