Gordon, (Replying to both your mails) Implementing multicast would be difficult since multicasting only works for UDP, and GlusterFS relies on a TCP connection. Moving GlusterFS to use UDP would require extensive changes and would bring many new problems of its own. Regarding the configuration you'd want to conserve bandwidth for some of your machines, you could do something like this (shown for one machine): simple nfs-like glusterfs afr low b/w box --------> /mnt/glusterfs --------> other three boxen high b/w box I don't see how this helps, though. The high b/w box has to send writes to the other three machines anyway, thus robbing them of their bandwidth? Vikas -- Engineer - Z Research http://gluster.com/