We have an uptime on over 99,99% (during a calendar year). At livebackend.info you can follow our uptime and sign up to receive a SMS or email if/when we have instability or a service window.
Our systems are hosted on a redundant and autoscaleable environment. Redundancy means that we always have more than one server that handles traffic in the case of a physical breakdown of a server the traffic will be redirected away from it.
Autoscaling means that we can quickly and without delay allocate more ressources when there is a need for it. This is possible because our datacenter provides a huge machine park where we are allocated the ressources that we need along the way.
With redundancy and autoscaling it is possible for us to handle major ticket sales without breaking a sweat. The customers will therefore not experience instability, slow loading times or downtime.