Lazy Shadowing - An Adaptive, Power-Aware, Resiliency Framework for Extreme Scale Computing
The major goal of the project was to examine the problem of resilience in exascale systems via mechanisms that minimize the impact of server crashes resulting from both permanent faults and transient errors or subtle time-dependent bugs in hardware or software. Shadowing was proposed as the main technique for accomplishing this in the proposal, wherein some replicas of the application are run at much lower power and opportunistically speeded up during periods of low activity of the main or when the main fails. A related goal of the project was to detect the errors early so that program crashes could be avoided or the scope of the rollbacks could be limited.
97 MATHEMATICS AND COMPUTING↗