NAME

       xr - Crossroads Load Balancer & Fail Over Utility

SYNOPSIS

       xr   [--verbose]   [--web-interface  XRSERVER:PORT]  --server  tcp:XRSERVER:PORT  --backend  BACKEND:PORT
       [--backend BACKEND:PORT] ...

DESCRIPTION

       This manual page briefly documents XR, the Crossroads Load Balancer & Fail Over Utility.

       XR is an open source load balancer and fail over utility for TCP based services. It is a dae mon  running
       in  user  space, and features extensive configurability, polling of back ends using wake up calls, status
       reporting, many algorithms to select the 'right' back end for a reques t (and user-defined algorithms for
       very special cases), and much more.

       XR  is  service-independent:  it  is  usable  for  any TCP service, such as HTTP(S), SSH, SMTP, dat abase
       connections. In the case of HTTP balancing, XR handles multiple host balancing, and can  provide  session
       stickiness for back end processes that need sessions, but aren't session-awa re of other back ends.

       XR furthermore features a management web interface and can be run as a stand-alone daemon, or via inetd.

       Execute 'xr -h' to get a complete list of available command-line parameters.

EXAMPLE

       xr  --verbose --server tcp:0:80 --backend 10.1.1.1:80 --backend 10.1.1.2:80 --backend 10.1.1. 3:80 --web-
       interface 0:8001

       This instructs XR to listen to port 80 and to dispatch traffic to  the  servers  10.1.1.1,  10.1.1.2  and
       10.1.1.2, port 80. A web interface for the balancer is started on port 8001.

       Direct  your  browser  to  the  server running XR. You will see the pages served by one of the three back
       ends. The console where XR is started, will show what's going on (due to the presence of --verbose).

       Direct your browser to the server running XR, but port 8001. You will see the web interface, which  shows
       the status, and where you can alter some settings.

SEE ALSO

       xrctl(1)

AUTHOR

       XR was written by Karel Kubat <karel@kubat.nl>. Web page: http://crossroads.e-tunity.com

       This man page was written by Frederik Dannemare <frederik@dannemare.net>.