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From: drk@athena.mit.edu (David R Kohr)
Newsgroups: comp.realtime
Subject: Re: real-time multicomputer systems
Message-ID: <1990Jun4.143545.29951@athena.mit.edu>
Date: 4 Jun 90 14:35:45 GMT
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Monty Norwood's discussion of the contiguous disk file facility in 
Harris' Nighthawk multiprocessor system got me wondering about how other
people out there handle the recording of massive amounts of instrumentation
data which occurs in short but dense bursts.  

The project I'm on here at Lincoln involves recording radar data at a rate 
of 13 Mb./sec. in the current version of the system, for a period of a 
minute or two; we may ultimately produce a system which records up to
40 Mb./sec.  We had to buy a very expensive digital tape recorder from
AMPEX Corporation to handle this rate, and have lots of specialized
hardware built and tied together with a custom high-speed data bus, to
feed the AMPEX recorder quickly enough.  But this system was essentially
designed three years ago, and I have been wondering if there are other
alternatives available nowadays for handling this kind of data rate.

--
David R. Kohr     M.I.T. Lincoln Laboratory      Group 45 ("Radars 'R' Us")
    email:    DRK@ATHENA.MIT.EDU (preferred)  or  KOHR@LL.LL.MIT.EDU
    phone:    (617)981-0775 (work)	      or  (617)527-3908 (home)