PRDC 2019 is the twenty-fourth event in the series of symposia started in 1989 that are devoted to dependable and fault-tolerant computing. PRDC is recognized as the main event in the Pacific area that covers many dimensions of dependability and fault tolerance, encompassing fundamental theoretical approaches, practical experimental projects, and commercial components and systems. As applications of computing systems have permeated into all aspects of daily life, the dependability of computing systems has become increasingly critical. This symposium provides a forum for countries around the Pacific Rim and other areas of the world to exchange ideas for improving the dependability of computing systems. Topics of interest include (but not limited to): - Software aging and rejuvenation - Safety-critical systems and software - Architecture and system design for dependability - Fault-tolerant algorithms and protocols - Reliability in cloud computing, Internet, and web systems and applications - Cloud computing security and privacy - Software defined networks architectures and protocols - Internet of things architectures, protocols, security and privacy - Dependability issues in artificial intelligence and its applications - Dependability issues in computer networks and communications - Dependability issues in high performance computing - Dependability issues in real-time systems - Dependability issues in databases and transaction processing systems - Dependability issues in cyber-physical systems - Dependability issues in socio-technical systems