Adaptive Checkpoint Interval Algorithm Considering Task Deadline And Lifetime Reliability For Real-Time System

Checkpointing mechanism is used to tolerate the impact of transient faults by rollback operation. Recently, it has also been used as a mechanism to enhance system's lifetime by identifying and tolerating permanent fault(5,19,10,12). However, equidistant checkpoint interval may cause task deadline violation in the system. Here, we propose an adaptive checkpoint interval placement algorithm (ADeLiRACI) that meets all tasks deadline. The checkpoint intervals are adjusted to minimize the impact of stresses and permanent faults on the running hosts. This novel mechanism allows greater applicability in real time systems with hard deadline such as weather prediction, financial transactions etc. We compare the estimated completion time for increasing fault-rate in the system against five existing algorithms. For all applications, ADeLiRACI is able to meet the hard deadline along with enhancing lifetime reliability of the system. (C) 2015 The Authors. Published by Elsevier B.V.