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Jiang Wu

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Journal article
Published: 18 July 2017 in Future Internet
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Live migration of virtual machines is an important approach for dynamic resource scheduling in cloud environment. The hybrid-copy algorithm is an excellent algorithm that combines the pre-copy algorithm with the post-copy algorithm to remedy the defects of the pre-copy algorithm and the post-copy algorithm. Currently, the hybrid-copy algorithm only copies all memory pages once in advance. In a write-intensive workload, copy memory pages once may be enough. However, more iterative copy rounds can significantly reduce the page faults in a read-intensive workload. In this paper, we propose a new parameter to decide the appropriate time to stop the iterative copy phase based on real-time situation. We use a Markov model to forecast the memory access pattern. Based on the predicted results and the analysis of the actual situation, the memory page transfer order would be adjusted to reduce the invalid transfers. The novel hybrid-copy algorithm is implemented on the Xen platform. The experimental results demonstrate that our mechanism has good performance both on read-intensive workloads and write-intensive workloads.

ACS Style

Zhou Lei; Exiong Sun; Shengbo Chen; Jiang Wu; Wenfeng Shen. A Novel Hybrid-Copy Algorithm for Live Migration of Virtual Machine. Future Internet 2017, 9, 37 .

AMA Style

Zhou Lei, Exiong Sun, Shengbo Chen, Jiang Wu, Wenfeng Shen. A Novel Hybrid-Copy Algorithm for Live Migration of Virtual Machine. Future Internet. 2017; 9 (3):37.

Chicago/Turabian Style

Zhou Lei; Exiong Sun; Shengbo Chen; Jiang Wu; Wenfeng Shen. 2017. "A Novel Hybrid-Copy Algorithm for Live Migration of Virtual Machine." Future Internet 9, no. 3: 37.

Journal article
Published: 02 June 2017 in Future Internet
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With the rapid development of Internet, the traditional computing environment is making a big migration to the cloud-computing environment. However, cloud computing introduces a set of new security problems. Aiming at the virtual machine (VM) escape attack, we study the traditional attack model and attack scenarios in the cloud-computing environment. In addition, we propose an access control model that can prevent virtual machine escape (PVME) by adapting the BLP (Bell-La Padula) model (an access control model developed by D. Bell and J. LaPadula). Finally, the PVME model has been implemented on full virtualization architecture. The experimental results show that the PVME module can effectively prevent virtual machine escape while only incurring 4% to 8% time overhead.

ACS Style

Jiang Wu; Zhou Lei; Shengbo Chen; Wenfeng Shen. An Access Control Model for Preventing Virtual Machine Escape Attack. Future Internet 2017, 9, 20 .

AMA Style

Jiang Wu, Zhou Lei, Shengbo Chen, Wenfeng Shen. An Access Control Model for Preventing Virtual Machine Escape Attack. Future Internet. 2017; 9 (2):20.

Chicago/Turabian Style

Jiang Wu; Zhou Lei; Shengbo Chen; Wenfeng Shen. 2017. "An Access Control Model for Preventing Virtual Machine Escape Attack." Future Internet 9, no. 2: 20.