====== ANL XrootD Setup (By Doug + SC & ES corrections) ======

=====Steps (While logged in as root)=====

  - Fetch the yum repo for either [[http://www.xrootd.org/binaries/xrootd-stable-slc5.repo | SL5]] or [[http://www.xrootd.org/binaries/xrootd-stable-slc6.repo | SL6]].
  - Put the appropriate repo into the /etc/yum.repos.d/ directory.
  - Edit the appropriate repo with any text editor.
  - Add the line (end of file)<code>priority=25</code>
  - Install Yum priorities<code>yum install yum-priorities</code>
  - Install the the various xrootd rpms's<code>yum install xrootd-libs.x86_64 xrootd-server.x86_64 xrootd-client.x86_64 xrootd-fuse.x86_64 xrootd-debuginfo.x86_64</code>
  - Create a data directory to be mounted, such as <code>mkdir /dataxrd</code>
  - Change ownership of mount point<code>chown xrootd:xrootd /dataxrd</code>
  - Create the xrootd data area:<code>mkdir /dataxrd/atlas</code>
  - Change the ownership of the xrootd data area <code>chown xrootd:xrootd /dataxrd/atlas</code>
  - Run the service command to setup xootd<code>/sbin/service xrootd setup</code>
  - Copy the xrootd configuration file and auth file over from atlas50<code>
scp root@atlas50:/etc/xrootd/xrootd-clustered.cfg  /etc/xrootd/xrootd-clustered.cfg
scp root@atlas50:/etc/xrootd/auth_file  /etc/xrootd/auth_file</code>
  - Look inside of xrootd-clustered.cfg to see that the following lines exists:<code>
# change to follow your local convention if different
set localroot = /dataxrd
oss.localroot $(localroot)</code>
  - Open the xrootd port in the iptables 1094 (In /etc/sysconfig/iptables)<code>-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 1094 -j ACCEPT</code>
  - Restart iptables<code>service iptables restart</code>
  - Startup Xrootd on the machine<code>/sbin/service xrootd start
/sbin/service cmsd start</code>
  - Remember that the log files are located here:<code>
/var/log/xrootd/xrootd.log
/var/log/xrootd/cmsd.log</code>

=====Testing=====

To test that the redirector sees the machine you just set up.  It must be done on a machine with xrootd client libs installed.
  - Test that the machine works. You should see its ip address<code>xrd <this machine> locateall /atlas</code>
  - Find out if you can see this machine from the redirector<code>xrd atlashn1 locateall /atlas</code>

===== Example of the usage =====

<code>
xrdcp test.txt  xroot://aschead01.hep.anl.gov:1094//atlas/chakanau/test/text.txt
</code>

Remove the directory:

<code>
rmdir xroot://aschead01.hep.anl.gov:1094//atlas/chakanau/test
</code>