[Discuss] Mirroring of files to all nodes in a cluster

[darose at darose.net (David Rosenstrauch)]

I'm looking for a Linux utility that will allow me to mirror/replicate a 
directory tree onto each and every node in a cluster, so that the data 
will reside on the local disk on each machine.  However, I'm not seeing 
anything that quite fits that bill.  So far I've found:

* DRBD
* Gluster FS

However, each one doesn't seem to achieve what I want in some key way:

* DRBD seems to only really work for 2-node master/slave replica type 
setups.  However I'm going to have a master and multiple slaves (at 
least 3 right now, and almost certainly more in the future).  It doesn't 
sound like DRBD supports that.

* Gluster seems to be a distributed file system.  I.e., the data gets 
sharded and spread across the multiple nodes in the cluster.  However, 
this would mean that there is not a complete local copy on each node.

Anyone have a recommendation for tool that will achieve what I want?  
Obviously homegrown rsync scripts running on each node would be an 
option here, but I was hoping to not have to roll my own solution for 
this.  Also, of course, if I'm mistaken about either DRBD or Gluster's 
capabilities, please feel free to correct.

Thanks,

DR