Sybase currently has active-active failover with its HA solution for ASE,
which does pretty much what you describe/
ASE's 'Shared disk clusters' version is one (big) step further and that's in
the works -- expected next year.

HTH,

Rob
-------------------------------------------------------------
Rob Verschoor

Certified Sybase Professional DBA for ASE 12.5/12.0/11.5/11.0
and Replication Server 12.5 / TeamSybase

Author of Sybase books (order online at www.sypron.nl/shop):
"Tips, Tricks & Recipes for Sybase ASE"
"The Complete Sybase Replication Server Quick Reference Guide"
"The Complete Sybase ASE Quick Reference Guide"

mailto:rob@YOUR.SPAM.sypron.nl.NOT.FOR.ME
http://www.sypron.nl
Sypron B.V., P.O.Box 10695, 2501HR Den Haag, The Netherlands
-------------------------------------------------------------

"Joe Weinstein" <joeNOSPAM@bea.com> wrote in message
news:430226bb$1@news.beasys.com...
> Hi all.
> Does Sybase have something like Oracle's RAC,
> perhaps with dual-ported disks, so that if a
> main DBMS goes down, a hot standby is immediately
> ready to take the same traffic, and has quick
> access to the same data, including in-doubt
> (prepared) XA transactions?
>
> Thanks,
> Joe Weinstein at BEA Systems
>