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Conference ulysse::rdb_vms_competition

Title:	DEC Rdb against the World

Moderator:	HERON::GODFRIND

Created:	Fri Jun 12 1987
Last Modified:	Thu Feb 23 1995
Last Successful Update:	Fri Jun 06 1997
Number of topics:	1348
Total number of notes:	5438

642.0. "Ingres 2pc support" by WARNUT::BRYAN () Tue May 08 1990 19:19

    Does Ingres have its own implementation of 2pc ?
    
    I've just returned from an Ingres seminar and their presenter swore
    blind that it did and had done so for about 3 months. He even explained
    how it worked, it sounded just like ddtm. He was referring to Ingres v6.3.
    
    I've seen or heard nothing of this until today. I knew Ingres did offer
    some distributed query facilities, can't remember the details, but
    not fully fledged 2pc. Is this guy being serious ?

T.R	Title	User	Personal Name	Date	Lines
642.1	Sort Of	BANZAI::BOOTH	What am I?...An Oracle?	`Tue May 08 1990 19:26`	5
	Ingres can support the 2PC PROTOCOL. That is, you can code the 2PC. But there is NO ENFORCEMENT. In other words, you can write the code, but if anything goes wrong, no corrective action will be taken. ---- Michael Booth
642.2	Why DECdtm is different	MOVIES::JJOHNSON	Acorn would be shipping now	`Mon May 14 1990 00:31`	20
	I haven't heard anything about Ingres' 2pc capabilities, but I think it is worthwhile to point out a major differentiator for DECdtm (aka DDTM) over virtually all of the competition: It is designed to not be limited to any specific database manager. Already it is supported by 3 (Rdb, DBMS, and RMS Journaling). Both TP monitors are working on their support of it. And we're pursing an aggresive development plan to have a stable, published interface for resource managers bundled into VMS within the next 18 months. It was designed with a view that 2pc acted as 'glue' between operations of differing resource managers. We've done the initial work and proven the basic concept. Now we're cleaning up some rough edges we've found and working towards publication of the interfaces. This model simply cannot be pursued efficiently by a 2pc implementation based within a single resource manager. fwiw, Jim.
642.3	VAX RALLY support for DECdtm.	4GL::KIRK	Roger Mellie, the man on the tellie!	`Mon May 14 1990 20:53`	9
	> It is designed to not be limited to any specific database manager. > Already it is supported by 3 (Rdb, DBMS, and RMS Journaling). Both TP > monitors are working on their support of it. And we're pursing an > aggresive development plan to have a stable, published interface for > resource managers bundled into VMS within the next 18 months. VAX RALLY is planning to support DECdtm in V2.2. Richard
642.4	Sort of, again...	NOVA::STEINER		`Sat May 19 1990 21:04`	4
	Ingres is about 1/2 way there. They announced 2PC with 6.3 but it will be the 2PC support in Ingres Star that will complete the picture and that is not out. Don't know the timing on that.
642.5	A little more	HAMPS::STEPHEN_I	Iain Stephen	`Tue Jun 12 1990 19:00`	18
	I was at Ingres last week to hear their proposed sollution to keeping a 'hot backup' database on a second VAX Cluster. They drew a picture looked just like ACMS and queues plus Rdb/VMS. However, they were very general about how it would work. Things like "It's written in C and SQL"' "Our European Development people have put it together" etc., etc. I was impressed with everything else but this section of the bid. This reminded me of the Oracle salesman with his overhead projector as his development workbench ! Iain.