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Mitigating Virtualization Failures Through Migration to a Co-Located Hypervisor
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DOI：10.1109/ACCESS.2021.3098644.png)
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Abstract
En 中文
Many organizations are moving their systems to the cloud, where providers consolidate multiple clients using virtualization, which creates challenges to business-critical applications. Research has shown that hypervisors fail, often causing common-mode failures that may abruptly disrupt dozens of virtual machines simultaneously. We hypothesize and empirically show that a significant percentage of virtual machines affected by a hypervisor failure are capable of continuing execution on a new hypervisor. Supported by this observation, we design a technique for recovering from hypervisor failures through efficient virtual machine migration to a co-located hypervisor, which allows virtual machines to continue executing with minimal downtime and which can be transparently applied to existing applications. We evaluate a proof-of-concept implementation using fault injection of hardware and software faults and show that it can recover, on average, 41-46% of all virtual machines, as well as having a mean virtual machine downtime of 3 seconds.
Keywords:
Virtual machine monitors
Cloud computing
Hardware
Virtualization
Virtual machining
Software
Fault tolerant systems
Cloud computing
dependability
fault injection
fault tolerance
virtualization
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