At Rackspace Technology, we’re constantly upgrading and updating our systems to meet the security and convenience of our customers.

A friend was trying to figure out what the GNU C Library (glibc) does with the round-robin domain name system (DNS) load balancing technique, and information about that is somewhat scarce. He expected it to randomly choose an address out of the multiple at the hostname, but it preferred only one of the addresses. This behavior is poorly documented, so I thought I should write a blog article about it.