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/
}}}

Make sure {{{arcproxy}}} tool is available on ARC CE node:
{{{
yum -y install nordugrid-arc-client
}}}

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 apelclient.* TO apel@localhost IDENTIFIED BY 'myverysecureapelpassword';
mysql> quit

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

Edit APEL parser configuration file ({{{/etc/apel/parser.cfg}}}) and specify DB, batch system, and ARC BLAH configuration:
{{{
[db]
hostname = localhost
port = 3306
name = apelclient
username = apel
password = myverysecureapelpassword

[site_info]
site_name = GOCBD-SITE-NAME
lrms_server = some.fqdn.lrms.id

[blah]
enabled = true
dir = /var/log/arc/accounting
filename_prefix = blahp.log
subdirs = false

[batch]
enabled = false
reparse = false
type = PBS
dir = /path/to/torque/server_logs/
filename_prefix = 201
subdirs = false

[logging]
logfile = /var/log/apelparser.log
level = INFO
console = false
}}}