CFP: 4th Workshop on Resiliency in High Performance Computing (Resilience) in Clusters, Clouds, and Grids in conjunction with the 17th International European Conference on Parallel and Distributed Computing (Euro-Par 2011) Bordeaux France, August 29 - September 2nd, 2011 Clusters, Clouds, and Grids are three different computational paradigms with the intent or potential to support High Performance Computing (HPC). Currently, they consist of hardware, management, and usage models particular to different computational regimes, e.g., high performance cluster systems designed to support tightly coupled scientific simulation codes typically utilize high-speed interconnects and commercial cloud systems designed to support software as a service (SAS) do not. However, in order to support HPC, all must at least utilize large numbers of resources and hence effective HPC in any of these paradigms must address the issue of resiliency at large-scale. Recent trends in HPC systems have clearly indicated that future increases in performance, in excess of those resulting from improvements in single- processor performance, will be achieved through corresponding increases in system scale, i.e., using a significantly larger component count. As the raw computational performance of these HPC systems increases from today's tera- and peta-scale to next-generation multi peta-scale capability and beyond, their number of computational, networking, and storage components will grow from the ten-to-one-hundred thousand compute nodes of today's systems to several hundreds of thousands of compute nodes and more in the foreseeable future. This substantial growth in system scale, and the resulting component count, poses a challenge for HPC system and application software with respect to fault tolerance and resilience. Furthermore, recent experiences on extreme-scale HPC systems with non-recoverable soft errors, i.e., bit flips in memory, cache, registers, and logic added another major source of concern. The probability of such errors not only grows with system size, but also with increasing architectural vulnerability caused by employing accelerators, such as FPGAs and GPUs, and by shrinking nanometer technology. Reactive fault tolerance technologies, such as checkpoint/restart, are unable to handle high failure rates due to associated overheads, while proactive resiliency technologies, such as migration, simply fail as random soft errors can't be predicted. Moreover, soft errors may even remain undetected resulting in silent data corruption. Important Web sites: Resilience 2011 at http://xcr.cenit.latech.edu/resilience2011 Euro-Par 2011 at http://europar2011.bordeaux.inria.fr Prior conferences Web sites: Resilience 2010 at http://xcr.cenit.latech.edu/resilience2010 Resilience 2009 at http://xcr.cenit.latech.edu/resilience2009 Resilience 2008 at http://xcr.cenit.latech.edu/resilience2008 Important dates: Paper submission deadline on June 5, 2011 Notification deadline on July 4, 2011 Resilience Workshop on August 30, 2011 Euro-Par conference on August 29 - September 2nd, 2011 Camera ready deadline is after the workshop Topics of interest include, but are not limited to: Reports on current HPC system and application resiliency HPC resiliency metrics and standards HPC system and application resiliency analysis HPC system and application-level fault handling and anticipation HPC system and application health monitoring Resiliency for HPC file and storage systems System-level checkpoint/restart for HPC System-level migration for HPC Algorithm-based resiliency fundamentals for HPC (not Hadoop) Fault tolerant MPI concepts and solutions Soft error detection and recovery in HPC systems HPC system and application log analysis Statistical methods to identify failure root causes Fault injection studies in HPC environments High availability solutions for HPC systems Reliability and availability analysis Hardware for fault detection and recovery Resource management for system resiliency and availability