[lug] Load-balancing web servers

[Harris, James]

> Is there a way to keep the files synchronized in 
> near-real-time, so the 
> load balancing works seamlessly?  I know I could have a third server 
> that's, say, NFS-mounted by the two web servers, but then I have a 
> single point of failure-- which is the very thing I'm trying 
> to avoid.  
> I looked at a package called DRBD a while back; it's a "network RAID" 
> system but was beta code and I had some problems with it.  
> And I don't 
> think rsync-ing every 10 seconds is a viable solution, either...

Check out http://www.it.uc3m.es/~ptb/nbd/ (Enhanced Network Block Device).
It's supposed to be a much better implementation of network mirroring.