an interesting choice for low cost hardware load balancing appliances is coyote point http://www.coyotepoint.com/products/?gclid=CI6ri9jQu6cCFQbc4Aodmi1V4Q however for my purpose open and free HAProxy remains best choice!! On Sun, Mar 6, 2011 at 9:22 PM, Charles Polisher <cpolish at surewest.net> wrote: > m.roth at 5-cent.us wrote: > >> A warning: round robin can be problematical. > > Amen. Consider what happens with round-robin DNS when one host > stops working. Round-robin DNS will hand out the address of the > failed host just as often as it did when it was all working. > Some clients (applications) will attempt to use another one > of the IP addresses they get from the DNS, some won't. > > A load balancer checks the health of the hosts and doesn't^Wshouldn't > route traffic to hosts that aren't serving requests. > > There are other considerations for round-robin DNS. As > you'll want to make the TTL's very small, you must expect > much more DNS traffic, so expect more load on the DNS. > > -- > Charles Polisher > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > -- GPG me!! gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B