Version 3.0.0 of the QCG-Computing service introduced some major changes in files and configuration layout, namely:
 * the layout of the directories adheres now general packages guidances, i.e. service is not installed anymore in `/opt/plgrid` but in standard paths (whit a few minor exceptions):
   * configuration is now stored in `/etc/qcg/qcg-comp/`,
   * logs can be found in `/var/log/qcg/qcg-comp/`,
   * the service and client binaries can be found in `/usr/sbin/` and `/usr/bin` respectively.
 * the 5.X Globus packages from EPEL/IGE repository are used (instead of providing it qcg-dep packaged),
 * the service can use the host certificate and key from standard location (i.e. /etc/grid-security),
 * the service can listen on standard 443 (HTTPs port).
 This guide aims to help with migration from 2.X version.

= Stop the services =
{{{
/etc/init.d/qcg-compd stop
/etc/init.d/qcg-ntfd stop
}}}
= Update the qcg-comp packges =
{{{
yum clean all
yum update qcg-comp qcg-comp-client
}}}