"Our MySQL Galera implementation contains all configuration data for PingOne. Various subsystems contribute or retrieve information from this geographically dispersed relational database." writes Mike Ward, Site Reliability Engineer at Ping Identity.

"Hurricane Sandy unfortunately battered the East Coast, but it couldn't bring us down even though PingOne lost a datacenter. As a result of our distributed architecture, the majority of PingOne customers knew Sandy only as a video clip on the nightly news.
As one Ping employee put it, “Yup...Still Up”.

Why PingOne's heart doesn't skip a beat: MySQL Galera