NAME
proofd - PROOF (The Parallel ROOT Facility)
DESCRIPTION
Using PROOF (The Parallel ROOT Facility) one can analyze trees in
parallel on a cluster of computers. The PROOF system consists of the
proofd(1) from-end program which is started via inetd(8).
proofd takes care of user authentication and overlays itself then with
the desired version of the proofserv(1) executable.
The proofserv(1) is a basically the same as the ROOT interactive module
root(1), except that it reads its commands from a socket instead of
from the terminal.
Since it is a remote server it will not do graphics and therefore is
not linked with any graphics libraries (Motif, X11, etc.).
SETTING UP PROOF
Since you need to handle sensitive system files, you need to have root
(the user, not the program!) privileges. Also, it’s recommended that
you read the appropiate man(1) pages first. These are inetd(8) (the
internet daemon), sysklogd(8) and syslog(3) (the system logger daemon),
and init(8) (the SYSV process control initializer).
In other words:
Be very VERY carefull when installing proofd
There, I said it. And ofcourse, no warrenties what so ever.
1 Make sure every node has ROOT installed. We’ll assume you
installed the ROOT applications in <bindir> (e.g. /usr/bin) and
the PROOF configuration files in files in <proofdir>/etc (e.g.
/usr/share/root/etc).
2 The TCP port 1094 was allocated by IANA, ( www.iana.org ), to
rootd, so add to /etc/services the lines:
proofd 1093/tcp
rootd 1094/tcp
3 On each node, add to /etc/inetd.conf the lines:
proofd stream tcp nowait root <bindir>/proofd proofd <proofdir>/proof
rootd stream tcp nowait root <bindir>/rootd rootd -i
You can substitute the <proofdir> with any directory that holds
your PROOF configuration, for example /etc/root/proof. However,
it should be shared among all nodes in the cluster.
4 Restart inetd or force it to re-read the config file:
kill -1 <inetd pid>
If you use SYSV init(8) scripts, you can probaly just do
/etc/init.d/inetd restart
or whatever is appropiate for your system.
5 On the master node, add to /etc/syslog.conf the line:
local5,local6.debug <proofdir>/log/proof.log
and all slave nodes:
local5,local6.debug @<master hostname>
where <master hostname> is domain name of the master node. All
PROOF syslog messages will be collected on the master node.
Just make one node in the cluster the master, all others are
slaves.
6 On all nodes, change the below lines in /etc/syslog.conf,
*.info;mail.none;news.none;authpriv.none /var/log/messages
to:
*.info;local5,local6,mail.none;news.none;authpriv.none /var/log/messages
7 Create an empty <proofdir>/log/proof.log:
echo "" > <proofdir>/log/proof.log
8 Restart syslogd or force it to re-read the config file:
kill -1 <syslogd pid>.
If you use SYSV init(8) scripts, you can probaly just do
/etc/init.d/sysklogd restart
or whatever is appropiate for your system.
9 Edit <proofdir>/etc/proof.conf to reflect your cluster
configuration. See the example proof.conf file for more
information.
If you installed ROOT using some precompiled package (for example a
Redhat Linux or a Debian GNU/Linux package), steps 2 to 4 may already
be done for you.
If you’re running Linux, Steps 5 to 7 can be somewhat automated using
the script proof-facility in <proofdir> of your distribution. This
script uses syslog-facility(1), from the Linux syslog(1) distribution,
and may run on other platforms as well - but no warrenties mind you!
Step 9 is completly up to the user.
EXAMPLE
That’s it. To test PROOF try the following:
root [1] gROOT->Proof("<master hostname>")
root [2] gPROOF->Print()
<shows information on the master and all active slave servers>
root [3] .q
FILES
<proofdir>
The location of your PROOF data. In binary packages, like for
Redhat LinuxI or Debian GNU/Linux, this will probably be
/usr/share/root/proof. If you got a binary tar(1)-ball from the
ROOT website, or a build it yourself without the static paths
option, then this directory could be ROOTSYS/proof. However, you
may set it to something else when starting your server.
<proofdir>/etc
This directory holds all the configuration files for your
cluster(s).
<proofdir>/etc/<cluster>.conf
This is the cluster named <cluster> configuration file. See
<proofdir>/etc/<cluster>.conf.sample for an example.
<proofdir>/etc/motd
This is Message-Of-The-Day file. See <proofdir>/etc/motd.sample
for an example.
<proofdir>/etc/noproof
If this file is present, all PROOF services will be diabled. See
<proofdir>/etc/noproof.sample for an example.
<proofdir>/etc/proof.conf
This is the PROOF configuration file. See
<proofdir>/etc/proof.conf.sample for an example.
~/.rootnetrc.conf
Configuration file for network access. Here you specify login
names and pass word, so it MUST be read/write-able only by the
user. See <proofdir>/etc/rootnetrc.conf.sample for an example.
<proofdir>/log
This directory holds the log files from the master and slaves.
<proofdir>/log/proof.log Syslog(1) log file for PROOF.
SEE ALSO
proofserv(1) , root(1) , rootd(1)
More information can be found at the ROOT website: http://root.cern.ch
ORIGINAL AUTHORS
The ROOT team (see web page above):
Rene Brun and Fons Rademakers
COPYRIGHT
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
USA
AUTHOR
This manual page was written by Christian Holm Christensen
<cholm@nbi.dk>, for the Debian GNU/Linux system (but may be used by
others).