Multi-Site Fault Tolerance
This is the highest level of protection a workload can get as it provides fault tolerant availability at two different geographic locations. With this type of fault tolerance, there is zero end-user impact and no loss of state or data, but the redundant workloads are hosted in different sites (the sites can be in different rooms or floors of the same building, or in separate buildings on a campus, or even in different cities). This ensures your applications continue to run even if one of the sites fails due to power issues, flooding, etc. Naturally, there is a higher network cost to this type of solution, but when only the highest levels of no downtime will do this is the best solution available. In regulated industries like pharmaceuticals, manufacturing and financial services, a site-wide downtime can lead to breakdowns in a distributed supply chain, placing process compliance at risk, which compounds your downtime costs. That's why multi-site fault tolerance is the best availability option to ensure that all in-flight data is safely replicated and remains available at all times.