What is a high-availability system?

A high-availability system is an IT system whose reliability, availability, and performance are appropriately tuned to the specific, usually critical applications of that system. A system is considered high-availability if it is available between 99.999% and 99.9999% of the time. In practice this means it is unavailable for only about 5 minutes across an entire year. In practice this translates into uninterrupted availability of your online store for customers and a guarantee of fault-free operation.