21. Ensuring that the calendars remain in agreement is a form of Byzantine fault tolerance 22. The decoupled nature of an Agile Application permits it to accommodate fault tolerance and scalability. 23. However, that traditional fault tolerance cannot always be achieved. 24. 9 . " Reflections on the History of Operating Systems Research in Fault Tolerance ". 25. The result is fault tolerance at a cost of a 50 % expansion of data. 26. This allows for more sharing of disk space among proxies, and for higher fault tolerance . 27. NonStop systems have more often been bought to meet scaling requirements than for extreme fault tolerance . 28. Some spacecraft such as the SpaceX Dragon flight system consider Byzantine fault tolerance in their design. 29. These can be used to pool storage from many disks while providing fault tolerance and redundancy. 30. Data within the grid can be replicated to achieve fault tolerance and protect against data loss.
