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NASA真的是用NetBSD吗？
Yes, it's true, There's at least a couple of ongoing projects at nasa are based on Netbsd, some of which are:
1. NetBSD is being used at NASA's Numerical Aerospace Simulation facility for a reason. Their main platforms are Alpha systems with lots of RAM and diskspace (terabyte and up), and they need a good, stable, codebase on which they can build custom projects. NetBSD was also the first free OS to make a y2k statement. See our testimonials for more success stories!
2. William Studenmund of Veridian MRJ Technology Solutions and NASA/Ames Research Center presented a Data Migration File System (DMFS) for NetBSD, which he developed with collaborators at NASA/Ames. The research was presented at the FREENIX track of the USENIX Technical Conference in San Diego on 21 June 2000.
The system, called NAStore 3, was designed to provide convenient mass storage for the Numerical Aerospace Simulation facility at NASA/Ames. Its purpose is to automatically migrate files from disk to tape as they cease to be accessed, and to transparently restore them to disk when a program tries to open them. It consists of three main components:
3. TCP in satellite networks (NASA Lewis) (top)
NASA Lewis Research Center - Satellite Networks and Architectures Branch use NetBSD almost exclusively in their investigation of TCP for use in satellite networks. They are currently examining several proposed modifications to the Transmission Control Protocol (TCP) protocol. Extensions are being tested in an attempt to improve satellite communication. However, the extensions are also being tested in terrestrial environments. Among the extensions being tested are restransmission mechanisms based on selective acknowledgements (e.g., FACK TCP) and TCP with larger initial windows. They are currently testing the mechanisms' performance benefits and their fairness to other traffic. They are also working with the Internet Engineering Task Force (IETF)'s TCP Over Satellite and TCP Implementations Working Groups.
4. Space Acceleration Measurement System II (SAMS-II) (top)
SAMS-II Project - Space Acceleration Measurement System II
NASA will be measuring the microgravity environment on the International Space Station using a distributed system, consisting of:
RTS (Remote Triaxial Systems)
Several PC104 ISA boxes running NetBSD 1.2.1 or 1.3.2.
ICU (Interium Control Unit
An IBM ThinkPad 760XD as a temporary main box.
The first RTS was scheduled to be delivered in September 1998, for launch to the space station in Jan. 2000.
More information can be found in some mail to the port-i386 mailing list, which also has some more details on the hardware.
5. NetBSD is being used as a cross-development platform for i960 and 68k router code and in satellite-based bulk data delivery systems. While on the subject of satellites, NASA will be measuring the microgravity environment on the International Space Station using a distributed system consisting of several PC104 ISA boxes running NetBSD 1.2.1 or 1.3.2. This is just one of the research projects currently using NetBSD.
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I have no idea what these things exactly are though.  |
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发表于 2003-04-11 20:02
