home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!ferkel.ucsb.edu!taco!gatech!darwin.sura.net!bogus.sura.net!howland.reston.ans.net!usc!rpi!crdgw1!rdsunx.crd.ge.com!ariel!davidsen
- From: davidsen@ariel.crd.GE.COM (william E Davidsen)
- Newsgroups: comp.arch
- Subject: Re: HOw many PC's make an Amdahl mainframe
- Message-ID: <1993Jan27.193225.19140@crd.ge.com>
- Date: 27 Jan 93 19:32:25 GMT
- References: <1k46ioINNijv@fido.asd.sgi.com> <1993Jan26.215541.9957@adobe.com> <1993Jan27.024351.17902@news.arc.nasa.gov>
- Sender: usenet@crd.ge.com (Required for NNTP)
- Reply-To: davidsen@crd.ge.com (bill davidsen)
- Organization: GE Corporate R&D Center, Schenectady NY
- Lines: 39
- Nntp-Posting-Host: ariel.crd.ge.com
-
- In article <1993Jan27.024351.17902@news.arc.nasa.gov>, lamaster@pioneer.arc.nasa.gov (Hugh LaMaster) writes:
-
- | Actually, though, there are plenty of problems that require the largest
- | available power, and, in the commercial world, there are an increasing
- | number of really big applications (e.g. VISA-type credit cards) which,
- | generally, need an increasing number of transactions-per-second. Anyone
- | tried to buy anything with a VISA card the last week before Christmas?
- | The wait can be rather long. Credit card companies, Airline Reservations,
- | banks with ATM applications, you-name-it. All have increasing needs for
- | systems with expanding transaction rates. A system which can do 2000
- | transactions/sec may indeed be worth a *lot* more than 200 systems which
- | can do 10 trans./sec.
-
- So who's doing the research on this? Obviously there will always be
- problems which need a lot of peak TPS, and I doubt that making bigger
- machines will prove practical for long.
-
- Just as scientific calculation has gone parallel, I would expect some
- distributed TPS to be coming, but I sure see a lot of bigger and bigger
- iron rather than cheap solutions you can put on a network of smaller
- systems. I count vector processors as parallel for this discussion,
- because they bypass the limitation that N operations take N times
- longer than one operation.
-
- Recently we have seen PVM running here, a program which allows a user
- to spread a problem over many machines while flooding the network and
- bringing all the machines in question to a grinding halt. Has someone
- done a similar program for TPS which I've missed?
-
- The solutions I've seen are not seamless, don't scale well, and fail
- to provide database consistency able to meet the standards I see met
- with single machine systems.
-
-
- --
- bill davidsen, GE Corp. R&D Center; Box 8; Schenectady NY 12345
- A terible poker player can have a great hand,
- A obnoxious fool can have a good idea.
- Both are winners, regardless of who has them.
-