Newsgroups: comp.parallel
From: Becker@informatik.uni-stuttgart.de (Wolfgang Becker)
Subject: Re: Tandem anyone
Organization: IPVR, University of Stuttgart, Germany
Date: 29 May 1995 15:25:20 GMT
Message-ID: <3qcp10$22f@usenet.srv.cis.pitt.edu>

> pisacksn@ix.netcom.com (7 Apr 1995 21:51:56 GMT):
> Are there any users of tandems in this news group, or can someone
> point  me to where there are users.

The research group at the IPVR in Stuttgart is using Tandem systems.

In general, Tandem provides parallel database servers for commercial
use.  Parallelization is usually done automatically by the query
optimizer of SQL/MP on query level. Data distribution can be done by
key range partitioning, and dynamic redistribution is performed during
parallel hash join operations. 

Tandem systems are loosely coupled, highly scalable systems based on
MIPS, using a proprietary distributed operating system with efficient
message passing.  However, UNIX, TCP/IP etc. are also available. Up to
now, Tandem focussed on the commercial DB market rather than on the
more scientific high performance computing market. Contact
zeller_hansjorg@tandem.com or sammer_harald@tandem.com for parallel
computing aspects. 

In Stuttgart, we develop load balancing and multimedia
storage/retrieval, which are (partially) based on Tandem systems.


Hope it helps, Wolfgang


