Re: database market share 2003

"Data Goob" <datagoob_at_hotmail.com> wrote in message news:<pT2uc.541$Oi.400_at_fe44.usenetserver.com>...
> The problem is Oracles' distributed lock manager.
>
> Take note, the DLM conzept actually came from IBM, and interestingly
> enough, Ingres for Linux will be using it. Look at who is pushing
> the DLM, it's OpenDLM from IBM!
>
> http://www.eweek.com/article2/0,1759,1599317,00.asp
> http://oss.software.ibm.com/dlm/

Did you read this? It clearly states the DLM concept is modelled after the VAX version. What it doesn't say is that Rdb was the reason for that, and Oracle improved upon it. Later, Oracle bought Rdb, with all of it's attendent intellectual property. Link doesn't seem to have been updated since 9/11/01...

> http://sourceforge.net/projects/opendlm
> http://opendlm.sourceforge.net/
>
> Oracle came about, if we look at history, from Larry seizing the dbms
> opportunity that IBM did not. So, it could be said that Oracle is a
> delta of DB2 on the mainframe, in its own incantation, pushed into UNIX.

Which is about as accurate as saying X windows are a delta of Windows 3.1.

jg

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