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From: Terry Lambert <terry@cs.weber.edu>
Subject: Re: Have anyone tried those products with FreeBSD?
Organization: Utah Valley State College, Orem, Utah
Date: Fri, 13 Jan 1995 04:22:40 GMT
Message-ID: <D2BtHt.8ML@park.uvsc.edu>
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References: <D257EE.vw@store.elvisti.kiev.ua> <1995Jan11.195714.13856@system9.unisys.com>
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alexd@system9.unisys.com (Alex Dumitru) wrote:
]
] Andrew V. Stesin (stesin@elvisti.kiev.ua) wrote:
] : And yet another question. I've hear that there's a commercial DBMS
] : somewhere, available with src, named like 'Vista' or 'Raima'.
] : Maybe someone can share his experience about it, too?
]
] I have worked on a project (in a previous job) that used Raima. It was
] not bad, but as I seem to recall fairly pricey. Not blazingly fast
] either (but this might not have been the products fault).
]
] If you want to get a feel for Raima, compile and play around with
] "typhoon". It looks and feels almost the same. I believe it implements
] about 95% of the Raima calls. Documentation is brief, but they have a
] sample setup that is enough to get you going.
dbVista (from Raiima corp -- I *think* that's the correct spelling)
is an associative database; Typhoon is not.
There are particular applications, like technical support databases,
where you want an associative database. As in "will all the problem
soloutions which match these (n) out of 10 keywords please stand up
in match frequency order, then sorted by hit frequency for each set
of equal numbers of keyword hits".
For Typhoon, this would be an n * n! search, whereas dbVista would
do it in log2(n+1) * (n-1)! ...the only other associative databases
I know of require IBM 3090 hardware or better.
dbVista is a unique little sucker.
Not related to the company, just a happy customer.
Terry Lambert
terry@cs.weber.edu
---
Any opinions in this posting are my own and not those of my present
or previous employers.