Computer Science – Performance
Scientific paper
Jul 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aspc..442..405s&link_type=abstract
Astronomical Data Analysis Software and Systems XX. ASP Conference Proceedings, Vol. 442, proceedings of a Conference held at Se
Computer Science
Performance
Scientific paper
Scientific computing is increasingly revolving around massive amounts of data. In astronomy, observations and numerical simulations are on the verge of generating many Petabytes of data. This new, data-centric computing requires a new look at computing architectures and strategies. The talk will revisit Amdahl's Law establishing the relation between CPU and I/O in a balanced computer system, and use this to analyze current computing architectures and workloads. We will discuss how existing hardware can be used to build systems that are much closer to an ideal Amdahl machine. Scaling existing architectures to the yearly doubling of data will soon require excessive amounts of electrical power. We have deployed various scientific test cases, mostly drawn from astronomy, over different architectures and compare performance and scaling laws. We discuss an inexpensive, yet high performance multi-petabyte system currently under construction at JHU.
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