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학술대회 Lightweight Live Migration for High Availability Cluster Service
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Bo Jiang, Binoy Ravindran, 김창수
International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS) 2010 (LNCS 6366), v.6366, pp.420-434
10MS3500, 저비용 대규모 글로벌 인터넷 서비스 솔루션 개발, 남궁한
High availability is a critical feature for service clusters and cloud computing, and is often considered more valuable than performance. One commonly used technique to enhance the availability is live migration, which replicates services based on virtualization technology. However, continuous live migration with checkpointing will introduce significant overhead. In this paper, we present a lightweight live migration (LLM) mechanism to integrate whole-system migration and input replay efforts, which aims at reducing the overhead while providing comparable availability. LLM migrates service requests from network clients at high frequency during the interval of checkpointing system updates. Once a failure happens to the primary machine, the backup machine will continue the service based on the virtual machine image and network inputs at their respective last migration rounds. We implemented LLM based on Xen and compared it with Remus - a state-of-the-art effort that enhances the availability by checkpointing system status updates. Our experimental evaluations show that LLM clearly outperforms Remus in terms of network delay and overhead. For certain types of applications, LLM may also be a better alternative in terms of downtime than Remus. In addition, LLM achieves transaction level consistency like Remus. © 2010 Springer-Verlag.
KSP 제안 키워드
Cloud Computing, High Frequency(HF), High availability, Live migration, Network delay, Service requests, Status updates, System migration, Virtual machine(VM), Virtualization technologies, state-of-The-Art