Path: utzoo!attcan!uunet!cs.utexas.edu!sun-barr!ames!pasteur!zooey.Berkeley.EDU!c162-aj
From: c162-aj@zooey.Berkeley.EDU (Mark Christiansen)
Newsgroups: comp.databases
Subject: Re: Ingres vs Sybase
Message-ID: <13680@pasteur.Berkeley.EDU>
Date: 12 May 89 17:52:51 GMT
References: <4306@elecvax.eecs.unsw.oz> <2350@canisius.UUCP>
Sender: news@pasteur.Berkeley.EDU
Reply-To: c162-aj@zooey.Berkeley.EDU.UUCP (Mark Christiansen)
Organization: University of California, Berkeley
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A magazine/newspaper called Computerworld has many very good articles
comparing and describibg various databases. 
	As for some recent light research that I have done on Sybase,
they are (as of the articles read from 1988) the only database with
government security clearance, data integrity (ie. non null primary
keys, and matching foreign keys, etc), and they have an excellent
data backup.
	The DB may be proted from one VAX on a network to another
if the original 'goes down' and the DB also uses a mirror disk
access system where it saves to different places on the disk, or
different drives simultaneously to protect lose of data to disk
crashes (or limits the lose at least).
	DataServer (the DBMS for Sybase) also using a multi-threaded
access to relations so that many users may be using the exact same
info without integrity conflict (ie. one writer, but many readers)
and DataServer also can shovel many users into a small area.
Somewhere on the order of 50 users to 1 Meg (don't have the articles
in front of me) which leaves massive room for caching resulting in less
I/O.
	This is all in addition to the fact that Sybase is an amazing
start-up company, only 5 1/2 years old with product for only 3 1/2, and
also their remarkable DataTools that use bitmapped or character 
terminals automatically from the same server.
	Any other info or corrections to this enthusiastic but not
too researched posting is welcome.
					Mark