Abstract
Although resilience is already an established field in system science and many methodologies and approaches are available to deal with it, the unprecedented scales of computing, of the massive data to be managed, new network technologies, and drastically new forms of massive scale applications bring new challenges that need to be addressed. This paper reviews the challenges and approaches of resilience in ultrascale computing systems from multiple perspectives involving and addressing the resilience aspects of hardware-software co-design for ultrascale systems, resilience against security attacks, new approaches and methodologies to resilience in ultrascale systems, applications and case studies.
Highlights
Ultrascale computing is a new computing paradigm that comes naturally from the necessity of computing systems that should be able to handle massive data in possibly very large scale distributed systems, enabling new forms of applications that can serve a very large amount of users and in a timely manner that we have never experienced before.Ultrascale Computing Systems (UCSs) are envisioned as large-scale complex systems joining parallel and distributed computing systems that will be two to three orders of magnitude larger than today’s systems (considering the number of Central Processing Unit (CPU) cores)
While it is obviously difficult to predict future developments in processing architectures with high accuracy, we have identified two major trends that are likely to affect big data processing: the development of many-core devices and hardware/software codesign
Memory elements are probably the hardware components that require the highest degree of fault tolerance: their extremely regular structure implies that transistor density in memories is substantially greater than in any other device
Summary
Ultrascale computing is a new computing paradigm that comes naturally from the necessity of computing systems that should be able to handle massive data in possibly very large scale distributed systems, enabling new forms of applications that can serve a very large amount of users and in a timely manner that we have never experienced before. Many new services and applications will be able to get advantage of ultrascale platforms such as big data analytics, life science genomics and HPC sequencing, high energy physics (such as QCD), scalable robust multiscale and multi-physics methods and diverse applications for analysing large and heterogeneous data sets related to social, financial, and industrial contexts These applications have a need for Ultrascale Computing Systems (UCSs) due to scientific goals to simulate larger problems within a reasonable time period. Faults are the cause of errors (reflected in the state) which without proper handling may lead to failures (wrong and unexpected outcome) Following these definitions, fault tolerance is an ability of a system to behave in a well-defined manner once an error occurs
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