Gravic recently published the article, A Modern Look at Reliability, Availability, and Scalability, in the May/June issue of The Connection. Availability and reliability are complimentary measures, and they each deserve equal consideration for mission-critical applications. Enterprises want both 100% availability and 100% reliability but can never achieve 100% for either. Availability is the proportion of time that an application or system is running and properly operating, and is measured in “9’s.” This article explores data integrity as a measurement of reliability, what affects data integrity, and what level of data integrity is needed. In short, businesses with mission-critical applications must seek to drive their Recovery Point Objective (RPO), Recovery Time Objective (RTO), Integrity Point Objective (IPO), and Integrity Time Objective (ITO) all to zero. Next, this series will explore ways to improve reliability, measure IPO and ITO, and explore several new architectures that will yield superior results for mission-critical systems.