National Astronomical Observatory of Japan
National Astronomical Observatory of Japan
National Astronomical Observatory of Japan
National Astronomical Observatory of Japan
Fujitsu
Fujitsu
Fujitsu
Systems Engineering Consultants
Systems Engineering Consultants
出版者
宇宙航空研究開発機構
出版者（英）
Japan Aerospace Exploration Agency (JAXA)
雑誌名
宇宙航空研究開発機構研究開発報告: 宇宙科学情報解析論文誌: 第1号
雑誌名(英)
JAXA Research and Development Report: Journal of Space Science Informatics Japan: Volume 1
Astronomers have built highly sensitive ground-based and space-based telescopes towards solving various issues of the modern astronomy and obtaining new knowledge of the Universe. As the result produced data volume has been explosively increased. In order to utilize these astronomical resources organically, construction of "virtual observatories" have been advanced through federating the astronomical data archives by means of the ICT technology, which easily collect and analyze observed data necessary for astronomical research. It is necessary to introduce parallel processing into the virtual observatory system in order to search and analyze various distributed astronomical data, we have constructed an experimental scalable parallel data retrieval and analysis system by utilizing the Hadoop. We made performance tests of the system, and obtained very useful insights that can be used in the construction of operational systems; data analysis performance increases in proportional to the number of tasks until when the number of tasks do not exceed the number of CPU cores of the computers used; effective performance decreases due to interference among the tasks when the number of tasks exceed the number of CPU cores. The basic concept of this system may be referred to in the construction of "Virtual Observatory" in other science fields.
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
JVO開発における大規模天文データ処理: 全天対応天文データ分散検索・解析機構の試験構築
65236008.pdf
(1.18MB)
