Enhancing Storage System Availability on Multi-Core Architectures with Recovery-Conscious Scheduling

In this paper we develop a recovery conscious framework for multi-core architectures and a suite of techniques for improving the resiliency and recovery efficiency of highly concurrent embedded storage software systems. Our techniques aim at providing continuous availability and performance during recovery while minimizing the time to recovery and the need for rearchitecting the system (legacy code). The main contributions of our recovery conscious framework include (1) a task-level recovery model, which consists of mechanisms for classifying storage tasks into recovery groups and dividing the overall system resources into recovery-oriented resource pools, and (2) the development of recovery-conscious scheduling, which enforces some serializability of failuredependent tasks in order to reduce the ripple effect of software failure and improve the availability of the system. We present three alternative recoveryconscious scheduling algorithms; each represents one way to trade-off bet...

• Type: Conference
• Year: 2008
• Where: FAST
• Authors: Sangeetha Seshadri, Lawrence Chiu, Cornel Constantinescu, Subashini Balachandran, Clem Dickey, Ling Liu, Paul Muench
• Keywords: FAST 2008, Operating System, Recovery Conscious Framework, Recovery Conscious Scheduling, Scheduling Algorithms