Before installing QCG-Computing make sure that software listed in the next subsections is installed. You may also read distribution specific notes available for:

Dependend libraries

  1. libxml2 >= 2.6.27
  2. openssl >= 0.9.7
  3. unixODBC >= 2.2.0
  4. Python (with the lxml package) >= 2.4

Note: If you are installing the libraries from binary packages check if those libraries were installed in devel versions (i.e. with headers files).


QCG-Core library

 QCG-Core is an utility and interoperability layer for the the basics QCG services (QCG-Computing and QCG-Notification in particular). As the GSI (Grid Security Infrastructure) is used to secure the transport layer you must compile the QCG-Core library with GSI support. After successful gridFTP installation (we recommend to use version 4.x or 5.x of Globus Toolkit) all you need to do is to check if the GLOBUS_LOCATION environment variable is set correctly (and the $GLOBUS_LOCATION/etc/ file sourced). You must also choose globus flavor that you wish to compile with (e.g. gcc64dbg for a 64bit machine or gcc32dbg if you are installing the QCG-Core on a 32bit machine):

tar xzf qcg-core-*.tar.gz 
cd qcg-core-*
./configure  --with-globus-flavor=gcc64dbg
sudo make install

Note: You may need to pass some additional options to ./configure script, if some of the dependencies are installed in non-standard locations (type ./configure --help for more info)

QCG-Computing service

After downloading the  source package the QCG-Computing installation can be done in a few steps, e.g:

tar xzf qcg-comp-*.tar.gz 
cd qcg-comp-*
./configure  --with-qcg-core=/opt/qcg/
sudo make install


Before you start create a new system user (e.g. qcg-comp) that will be used by the service (and only the QCG-Computing service) to run in unprivileged mode:

useradd -d  /opt/qcg/var/log/qcg-comp/ -M  qcg-comp

Installation path

Please note that the source packages install QCG into /opt/qcg by default while the other documentation pages assumes that all commands are in standard system paths.