Re: Accessing same C-ISAM file from file server *and* clients

>From: uunet!hgoedd.enet.dec.com!eddieleung (Eddie Leung) >Subject: Accessing same C-ISAM file from file server *and* clients >Date: Tue, 2 Mar 1993 03:06:31 GMT >X-Informix-List-Id: <news.2737> > A customer has already already a whole bunch of applications using C-ISAM >v2.1 for DOS. Now they want to put these C-ISAM files onto their >DECsystem 5000/240 running Ultrix. > It is possible to set up file services on the DECsystem so that both the >DOS machines and the DECsystem itself can see exactly the same files with >exactly the same contents, byte by byte. I am sure the C-ISAM applications >on DOS can run as usual. However, I am not sure whether I can use C-ISAM >on Ultrix to access the same C-ISAM files. (Do C-ISAM on DOS and Ultrix >employ exactly the same file format ?) > If anyone has tried it or knows for sure that it can or cannot be done, >I would appreciate your help by E-mail in addition to posting here. I can't answer for the legality of it -- someone would have to scrutinize the licences rather more carefully than I've ever done it. Technically, however, you can indeed access the same files, subject to one major proviso: C-ISAM files store the FLOAT and DOUBLE (SQL SMALLFLOAT and FLOAT) values in a machine dependent way. All other data types (integer, decimal, date, char) are stored in a machine independent format. Yours, Jonathan Leffler (johnl@obelix.informix.com) #include <disclaimer.h>