Re: NEED PRODUCT INFORMATION (non advertising)
->From: lunde@cs.tu-berlin.de (Lars Grupe) ->Subject: NEED PRODUCT INFORMATION (non advertising) ->Date: 19 Apr 1993 00:14:39 GMT ->Reply-To: lunde@cs.tu-berlin.de (Lars Grupe) ->Organization: Technical University of Berlin, Germany -> ->I plan to use a CASE-Tool called ASES (from Ariadne/Germany) which offers ->two database interfaces for Informix products: Informix C-ISAM 3.0 -> or Informix SE 4.1. -> ->As I would not have to worry about actually programming C-ISAM I am ->taking it into consideration as a cheap alternative. But I would like ->to know what disadvantages I buy with C-ISAM concerning PORTABILITY ->(DOS/UNIX), CLIENT/SERVER ARCHITECTURE (heterogeneous networks), ->STABILITY, PERFORMANCE and DATA INTEGRITY. -> ->On the other hand C-ISAM offers 'database' functions as well as a C API ->whereas SE is a pure engine which would require ESQL/C (e.g.) to ->be actually used. AM I WRONG ON THAT ONE? And what would be an ESQL/C ->runtime license (runtime for what)? -> ->My last question concerns Informix Net. I often found the example of a ->client running on a DOS PC using a database on a UNIX server. But are other ->combinations possible: DOS client - DOS server (SE) -> UNIX client - DOS server (SE)? -> ->Any response would be greatly apprechiated - EMAIL preferred. -> -> ->----------------------------------------------------------------------------- -> Lars Grupe UID lunde <lunde@cs.tu-berlin.de> -> Technische Universitaet Berlin ->----------------------------------------------------------------------------- Guten Morgen, Lars, I had hoped that someone who knows more about C-ISAM than I do would answer your questions. Since that is not happening, I will try to answer the small part that I know about. I use 4GL, not ESQL/C. Our runtime consists of a set of dynamically linked libraries. These get linked into the executable at run time, rather than at ld time. Since the 4GL gets translated into a form of ESQL/C, I would presume that ESQL/C uses a similar library scheme. Probably the ESQL/C library is smaller, since it does not need to support the 4GL language constructs, just the database stuff. ASES should provide the necessary runtime licenses, but I don't know whether this would be a complete ESQL/C runtime, or a special sub-set that they have licensed from Informix. I would guess that you don't need a complete ESQL/C license, since the ASES product seems to replace that program/DB interface. I have heard of several DOS client - DOS server environments, usually running Novell or some similer NetOS. I don't believe I have ever seen references to a UNIX client - DOS server system. Based on the relative performance of DOS and UNIX servers, I can not imagine why one would do such a thing. Auf Wiederschreiben, Alan +------------------------------+---------------------------------------+ | R. Alan Popiel | Internet: alan@den.mmc.com | | Martin Marietta, LSC | ( Please note: My opinions do not ) | | P.O. Box 179, M/S 5422 | ( represent official Martin policy. ) | | Denver, Colorado 80201-0179 | Voice: 303-977-9998 | +------------------------------+---------------------------------------+