Toshihiko Kashiyama
Hitachi
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Publication
Featured researches published by Toshihiko Kashiyama.
international conference on conceptual structures | 2011
Toshihiko Kashiyama; Tomohiro Hanai; Yoshio Suzuki; Ken Naono
Abstract Aiming to solve the performance-degradation problem when multiple computing nodes are in use in mission-critical batch systems (so-called “grid-batch” systems), a new performance-prediction method that focuses on metadata management for file input/output (I/O) control and performance degradation in case of concurrent I/O streams is proposed. To enhance the accuracy of the prediction, this I/O-performance prediction method models metadata management time as a function of number of files and models performance degradation as a probabilistic function of sequential I/O throughput and random I/O throughput. According to an evaluation of the proposed method, the difference between actual and estimated execution time is 14.0%. In contrast, as for the storage/network-based conventional method, the difference is 36.5%. These results demonstrate that the target prediction error, namely, within 20%, was accomplished with the proposed method, which can therefore be considered effective in predicting the performance of grid-batch systems.
Archive | 2006
Yoshifumi Takamoto; Takao Nakajima; Toshihiko Kashiyama
Archive | 2007
Toshihiko Kashiyama; Itaru Nishizawa
Archive | 2009
Tsuneyuki Imaki; Itaru Nishizawa; Toshihiko Kashiyama
Archive | 2008
Toshihiko Kashiyama; Itaru Nishizawa; Tsuneyuki Imaki
Archive | 2008
Itaru Nishizawa; Tsuneyuki Imaki; Toshihiko Kashiyama
Archive | 2009
Toshihiko Kashiyama; Itaru Nishizawa; Tsuneyuki Imaki
Archive | 2008
Norihiko Moriwaki; Nobuo Sato; Tsuneyuki Imaki; Toshihiko Kashiyama; Itaru Nishizawa; Masashi Egi
Archive | 2006
Tsuneyuki Imaki; Toshihiko Kashiyama; Itaru Nishizawa; 常之 今木; 俊彦 樫山; 格 西澤
Archive | 2006
Toshihiko Kashiyama; Itaru Nishizawa; Tsuneyuki Imaki