Install ARC BLAHP-logger:
{{{
svn co http://trac.grid.org.ua/repos/workarea/arc-misc/arc-blahp-logger /usr/libexec/arc/
mkdir /var/log/arc/accounting/
}}}

Configure ARC to call logger to write BLAHP log. In the {{{/etc/arc.conf}}} add following configuration and restart A-REX:
{{{
authplugin="FINISHED timeout=10,onfailure=pass /usr/libexec/arc/arc-blahp-logger /var/log/arc/accounting/blahp.log- %W %C %I %u ce.fqdn:2811/nordugrid-torque-"
}}}

{{{
yum -y localinstall http://emisoft.web.cern.ch/emisoft/dist/EMI/3/sl6/x86_64/base/emi-release-3.0.0-2.el6.noarch.rpm
yum -y install apel-client apel-parsers
}}}

{{{
yum -y install mysql-server mysql
chkconfig mysqld on
service mysqld start
mysql_secure_installation
mysql -u root -p
mysql> CREATE DATABASE apel;
mysql> GRANT ALL PRIVILEGES ON apel.* TO apel@localhost IDENTIFIED BY 'myverysecureapelpassword';
mysql> quit

mysql -u apel -p apel < /usr/share/apel/client.sql
}}}