Giga view parallel image server performance analysis

Professionals in various fields such as medical imaging, biology and civil engineering require rapid access to huge amounts of uncompressed pixmap image data. Multi-media interfaces further increase the need for large image databases. In order to fulfill these requirements, the GigaView parallel image server architecture relies on arrays of intelligent disk nodes, each disk node being composed of one processor and one disk. This contribution analyzes through simulation and experimentation the behavior of the GigaView under single and multiple requests, and compares it to the behavior of RAID servers. It evaluates image visualization window access times under various parameters such as load factors and the number of cooperating disk nodes. Under single request, the GigaView image server can be modeled as a single high-throughput low-latency secondary storage device. Under multiple requests, the notions of utilization and maximum sustainable throughput define accurately the behavior of the GigaView

Performances of Multiprocessor Multidisk Architectures for Continuous Media Storage

Multimedia interfaces increase the need for large image databases# capable of storing and reading streams of data with strict synchronicity and isochronicity requirements. In order to ful#ll these requirements# we consider a parallel image server architecture which relies on arrays of intelligent disk nodes# each disk node being composed of one processor and one or more disks. This contribution analyzes through bottleneck performance evaluation and simulation the behavior of twomulti#processor multi#disk architectures # a point#to#point architecture and a shared#bus architecture similar to currentmultiprocessor workstation architectures. We compare the two ar# chitectures on the basis of twomultimedia algorithms # the compute#bound frame resizing by resampling and the data#bound disk#to#client stream transfer. The results suggest that the shared bus is a potential bottleneck despite its very high hardware throughput #400Mbytes#s# and that an architecture with addressable local mem# ori..

Aeronautical engineering: A continuing bibliography with indexes (supplement 301)

This bibliography lists 1291 reports, articles, and other documents introduced into the NASA scientific and technical information system in Feb. 1994. Subject coverage includes: design, construction and testing of aircraft and aircraft engines; aircraft components, equipment, and systems; ground support systems; and theoretical and applied aspects of aerodynamics and general fluid dynamics