Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!hp4nl!dutrun!dutrun2!dutnak2!johan From: johan@dutnak2.tudelft.nl (Johan Haas) Newsgroups: comp.unix.aix Subject: Can a large RS/6000 easily replace a Convex? Message-ID: Date: 3 Jun 91 14:31:34 GMT Sender: news@dutrun2.tudelft.nl Lines: 27 We are considering to replace our current Convex C1 with a mix of RS/6000 systems instead of upgrading to a Convex C2. I would like to hear if e.g. the model 550 is any good to serve as a machine for, say, 8 PhD. students (like myself). We do a lot of program development, but also do finite difference simulations that run easily 10 hours on our C1. I know that the MIPS/MFLOPS performance of the 550 is superior to that of the Convex, but there are rumours that the multiuser performance of RISC machines is very bad. Is this true? Another issue is the single precision Floating Point performance that --according to a lettr to Unix World-- can be worse than the double precision performance. We do most of our work in single precision. I would appreciate any comments Johan de Haas tel. +31 15 785188 E-mail: johan@dutnak2.tudelft.nl Lab. of Seismics & Acoustics Delft University of Technology P.O Box 5046, 2600 GA Delft, The Netherlands -- Johan de Haas tel. +31 15 785188 E-mail: johan@dutnak2.tudelft.nl Lab. of Seismics & Acoustics Delft University of Technology P.O Box 5046, 2600 GA Delft, The Netherlands