joe

I am interested in a comparison between Rdb and Mimer, primarily on
Alpha but also on VAX. (I suspect that the differences between Rdb and
Mimer are greater than the differences between Alpha and VAX for the
same product.) I have some familiarity with Rdb, but none (yet) with
Mimer.

In particular, I would be interested in hearing from people who have
switched from Rdb to Mimer (or vice versa), whether or not the switch
was worth the trouble, and/or from folks familiar with both.

If you don't want to reply to the newsgroup, then email me after
removing the obvious capital-letter spam-blocker. Any information
provided (even by Rdb engineers) will be treated with the utmost
discretion.

Among others, I am interested in the following points:

o performance, especially for CPU-intensive queries on a large
(several TB) database with many concurrent users

o differences in SQL (in particular, what non-standard SQL commands
would I have to rewrite if moving from Rdb to Mimer)

o using Mimer in a cluster (this is relatively straightforward with
Rdb)

o is the lock-avoidance strategy of Mimer all it is cracked up to
be?

o pricing (commercial licenses, support, upgrades)

o ease of backup (for a few-TB database)


Thanks,

Joe

john smith

For this kind of need, you also might want to contact Jim Starkey, principal
author of Interbase, now available in open source as Firebird.

The original Interbase was first released on VMS. The VMS code is still in
Firebird but has not been built on VMS in some time, but Jim might be
interested in your situation.

Interbase/Firebird is a very cool product. I last used v4.x on VMS.

--
OpenVMS - The often imitated but never advertised operating system.

tom m

You might also want to look into Ingres. The opensource version should be
available on VMS (Alpha only) within the next few months. Do***entation for
R3 can be found at http://www.opensource.ca.com.