Enabling Instantaneous Relocation of Virtual Machines with a Lightweight VMM Extension

Hirofuchi, Takahiro; Nakada, Hidemoto; Itoh, Susumu; Sekiguchi, Satoshi

doi:10.1109/ccgrid.2010.42

Cited by 53 publications

(35 citation statements)

References 6 publications

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“…Adaptive pre-paging and dynamic self-ballooning [8] can improve the post-copy performance. Hirofuchi et al [23] through a lightweight extension implement post-copy to KVM. Besides, some researches proposed hybrid live migration [24,25,26 ] approach that use pre-copy and post-copy methods simultaneously.…”

Section: Related Workmentioning

confidence: 99%

ITC-LM: A Smart Iteration-Termination Criterion Based Live Virtual Machine Migration

Zhu

Huang

et al. 2013

Lecture Notes in Computer Science

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Abstract. Live migration of virtual machines (VMs) plays an important role in grids, clouds and datacenters, and has become the cornerstone of resource management in virtualized systems. The efficiency of live migration depends on the downtime, total migration time and total transferred data. However, while migrating a memory-intensive VM, XEN/KVM often do many useless iterations of memory copy in order to reach expected downtime which can never be reached, leading to a great deal of useless data transferring and insufferable total migration time. It consumes mass of network bandwidth and CPU resource when transferring memory from one to another node. Hence, a critical task is to determine the optimal time to terminate the copy iteration for live migration. In this paper, we propose a smart iteration-termination criterion based live migration which is termed as ITC-LM, to self adaptively control when to terminate iteration. We have implemented ITC-LM into KVM/QEMU. The improvement is significant, especially when migrate a memory-intensive VM. The experimental results show that, our approach can decrease 50.33% of total transferred data on average without impairing migration downtime.

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Section: Related Workmentioning

confidence: 99%

ITC-LM: A Smart Iteration-Termination Criterion Based Live Virtual Machine Migration

Zhu

Huang

et al. 2013

Lecture Notes in Computer Science

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“…Reference [5] developed a postcopy live migration mechanism for the paravirtualization mode of Xen, which exploited the swap-in/out code of the Linux kernel for on-demand memory transfer. As described in our previous work [6], we have developed a postcopy live migration mechanism for KVM. We will publish its source code under an open source license [1].…”

Section: Related Workmentioning

confidence: 99%

“…In our previous work [6], we developed a postcopy live migration mechanism for KVM. In contrast with precopy migration, memory pages are transferred after a VM is resumed at a destination host.…”

Section: Postcopy Live Migrationmentioning

confidence: 99%

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Reactive Cloud: Consolidating Virtual Machines with Postcopy Live Migration

Hirofuchi

Nakada

Itoh

et al. 2012

IPSJ Online Transactions

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Dynamic consolidation of virtual machines (VMs) through live migration is a promising technology for IaaS datacenters. VMs are dynamically packed onto fewer server nodes, thereby eliminating excessive power consumption. Existing studies on VM consolidation, however, are based on precopy live migration, which requires dozens of seconds to switch the execution hosts of VMs. It is difficult to optimize VM locations quickly on sudden load changes, resulting in serious violations of VM performance criteria. In this paper, we propose an advanced VM consolidation system exploiting postcopy live migration, which greatly alleviates performance degradation. VM locations are reactively optimized in response to ever-changing resource usage. Sudden overloading of server nodes are promptly resolved by quickly switching the execution hosts of VMs. We have developed a prototype of our consolidation system and evaluated its feasibility through experiments. We confirmed that our consolidation system achieved a higher degree of performance assurance than using precopy migration. Our micro benchmark program, designed for the metric of performance assurance, showed that performance degradation was only 12% or less, even for memory-intensive workloads, which was less than half the level of using precopy live migration. The SPECweb benchmark showed that performance degradation was approximately 10%, which was greatly alleviated from the case of using precopy live migration (21%).

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“…An alternative to pre-copy is live migration based on post-copy [8,9], which first transfers CPU state and resumes the VM on the destination host. Memory pages are then fetched from the source host on demand, in addition to a background copying process to decrease the total migration time and quickly remove the residual dependency on the source host.…”

Section: Background and Related Workmentioning

confidence: 99%

Shrinker: Improving Live Migration of Virtual Clusters over WANs with Distributed Data Deduplication and Content-Based Addressing

Riteau

Morin

Priol

2011

Euro-Par 2011 Parallel Processing

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Abstract. Live virtual machine migration is a powerful feature of virtualization technologies. It enables efficient load balancing, reduces energy consumption through dynamic consolidation, and makes infrastructure maintenance transparent to users. While live migration is available across wide area networks with state of the art systems, it remains expensive to use because of the large amounts of data to transfer, especially when migrating virtual clusters rather than single virtual machine instances. As evidenced by previous research, virtual machines running identical or similar operating systems have significant portions of their memory and storage containing identical data. We propose Shrinker, a live virtual machine migration system leveraging this common data to improve live virtual cluster migration between data centers interconnected by wide area networks. Shrinker detects memory pages and disk blocks duplicated in a virtual cluster to avoid sending multiple times the same content over WAN links. Virtual machine data is retrieved in the destination site with distributed content-based addressing. We implemented a prototype of Shrinker in the KVM hypervisor and present a performance evaluation in a distributed environment. Experiments show that it reduces both total data transferred and total migration time.

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Enabling Instantaneous Relocation of Virtual Machines with a Lightweight VMM Extension

Cited by 53 publications

References 6 publications

ITC-LM: A Smart Iteration-Termination Criterion Based Live Virtual Machine Migration

ITC-LM: A Smart Iteration-Termination Criterion Based Live Virtual Machine Migration

Reactive Cloud: Consolidating Virtual Machines with Postcopy Live Migration

Shrinker: Improving Live Migration of Virtual Clusters over WANs with Distributed Data Deduplication and Content-Based Addressing

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