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SLCHOOSED(1)          User Contributed Perl Documentation         SLCHOOSED(1)


NAME

       slchoosed - Distributed load chooser for Perl Schedule::Load


SYNOPSIS

       slchoosed [ --help ] [ --port=port ] [ --dhost=host ] [ --version ]


DESCRIPTION

       slchoosed will start a daemon to choose machines for the Schedule::Load
       package.  Slchoosed creates two processes, so that if second process
       exits, the first may restart it automatically.

       slchoosed is run on one host in the network.  This host is specified in
       the SLCHOOSED_HOST environment variable, which may also specify
       additional cold standby hosts in case the first host goes down.
       Slchoosed collects connections from the slreportd reporters, and
       maintains a internal database of the entire network.  User clients also
       connect to the chooser, which then gets updated information from the
       reporters, and returns the information to the user client.  As the
       chooser has the entire network state, it can also choose the best host
       across all CPUs in the network.

       It will take 30-60 seconds for the reporting hosts to be rediscovered
       when the chooser first starts.


ARGUMENTS

       --help
           Displays this message and program version and exits.

       --dhost
           Specifies the daemon host name that slchoosed uses.  May be
           specified multiple times to specify backup hosts.  Defaults to
           SLCHOOSED_HOST environment variable, which contains colon separated
           host names.  When slchoosed starts, any hosts listed AFTER the
           current host are assumed to be backup hosts, and are sent a reset
           so that this host may takeover the choosing task.

       --nofork
           For debugging, prevents the daemon from creating additional
           processes and from going into the background.  This allows messages
           to appear on stdout, and ctrl-C to stop the daemon.

       --port
           Specifies the port number that slchoosed uses.  Defaults to
           SLCHOOSED_PORT environment variable or slchoosed service, or 1752.

       --version
           Displays program version and exits.


DISTRIBUTION

       The latest version is available from CPAN and from
       <http://www.veripool.org/>.

       Copyright 1998-2011 by Wilson Snyder.  This package is free software;
       you can redistribute it and/or modify it under the terms of either the
       GNU Lesser General Public License Version 3 or the Perl Artistic
       License Version 2.0.


AUTHORS

       Wilson Snyder <wsnyder@wsnyder.org>


SEE ALSO

       slchoosed_watchd, slreportd, Schedule::Load, Schedule::Load::Chooser

perl v5.20.2                      2011-01-02                      SLCHOOSED(1)

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