金田の論文

Kanada, Y., and Tarui, T., 10th International Conference on Networks (ICN 2011), 2011-1-24.

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要約: Two network-virtualization architectures, namely, network segmentation and network paging, were investigated. They are analogical to two memory-virtualization architectures: segmentation and paging. Network paging, which is relatively new and is based on a type of network-address translation (NAT), is focused on. This architecture requires smaller packet size and has several more advantages over the conventional architecture (i.e., network segmentation). Intranet- and extranet- type communication methods based on this architecture are described. An address translators is placed at each edge router in the WAN and used to evaluate client-server communication under wide-area virtual-machine (VM) live migration as a case of extranet-type communication.

研究テーマ紹介: ネットワーク仮想化

Kanada, Y., and Tarui, T., 25th International Conference on Information Networking (ICOIN 2011), 2011-1-28, http://dx.doi.org/10.1109/icoin.2011.5723191

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要約: In cloud-computing environments, migration of virtual machines (VMs) between data centers can solve many problems such as load balancing and power saving. One of the difficulties in wide-area migration, however, is the “address-warping” problem, in which the address of the VM warps from the source server to the destination server. This confuses or complicates the status of the WAN, and the LANs connected to the WAN. We propose two solutions to this problem. One is to switch an address-translation rule, and the other is to switch multiple virtual networks. The former is analogous to paging in memory virtualization, and the latter is analogous to segmentation. The “network-paging” based method is described and our evaluation results are shown. It took less than 100 ms in average to switch from the source to the destination server using this method.

研究テーマ紹介: ポリシーにもとづくネットワーキング