+ Visit NASA.gov + Contact NASA   + Home Collection > NASA  NASA Center > NASA (non Center Specific)  Publication Year > 1971-1980 > 1977  Subject > A-C > Computer Operations And Hardware  Availability Options > Order From CASI > CD-ROM, DVD, Print  Item/Media Type > NASA Report > Contractor Report (CR)  Item/Media Type > Technical Report  Note: Start a new navigation search by selecting a link above     Previous Record | Next Record + Back to Results   + Printer Friendly Title: Spacelab output processing system architectural study Author(s): NONE Abstract: Two different system architectures are presented. The two architectures are derived from two different data flows within the Spacelab Output Processing System. The major differences between these system architectures are in the position of the decommutation function (the first architecture performs decommutation in the latter half of the system and the second architecture performs that function in the front end of the system). In order to be examined, the system was divided into five stand-alone subsystems; Work Assembler, Mass Storage System, Output Processor, Peripheral Pool, and Resource Monitor. The work load of each subsystem was estimated independent of the specific devices to be used. The candidate devices were surveyed from a wide sampling of off-the-shelf devices. Analytical expressions were developed to quantify the projected workload in conjunction with typical devices which would adequately handle the subsystem tasks. All of the study efforts were then directed toward preparing performance and cost curves for each architecture subsystem. NASA Center: NASA (non Center Specific) Publication Date: Dec 8, 1977 Document Source: CASI No Digital Version Available: Go to Tips On Ordering Document ID: 19780008697 Accession ID: 78N16640 Publication Information: Number of Pages = 233 Report Number: NASA-CR-156679 Contract-Grant-Task Number: NAS5-23438 Price Code: A11 Keywords: COMPUTER SYSTEMS DESIGN; COST ANALYSIS; DATA PROCESSING; SPACELAB; DATA STORAGE; PERFORMANCE TESTS; TECHNOLOGY ASSESSMENT; Accessibility: Unclassified; No Copyright; Unlimited; Publicly available; Final Report Updated/Added to NTRS: 2008-06-30 + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007