Noboru Iwamatsu

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IaaS clouds have attracted much attention, and OpenStack has become a de facto standard software for building open-source IaaS clouds. However, the performance and scalability of OpenStack services still have room for improvement. This study focused on the admission control of API requests to improve performance. We revealed the basic effect of admission(More)
Big data analysis and a data storing applications require a huge volume of storage and a high I/O performance. Applications can achieve high levels of performance and cost efficiency by exploiting the high I/O performances of direct attached storages (DAS) such as internal HDDs. With the size of stored data ever increasing, it will be difficult to replace(More)
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