Abstract
Computer systems are intertwined in many modern human activities and, more importantly, they play key roles in critical domains. As such, it is critically important to assess the dependability of computing systems. Data collected under real workload conditions can provide troves of valuable information about the stresses the systems encounter and their responses to them. Relevant data includes text logs and numeric data from application, system, network, and environmental sensors. The inherent value of reliability and security data is well recognized by practitioners, academia, and industry. Effective analysis deepens our understanding of the systems, ranging from failure causes to the progression of malicious attacks, and in turn enables stronger designs and better monitoring strategies.