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

In article <1n2igrINNprp@emory.mathcs.emory.edu> obelix.informix.com!johnl@emory.mathcs.emory.edu (Jonathan Leffler) writes: >> 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 ?) > >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. Um, I think an even more basic proviso is index node size differences. I suspect that the DOS C-ISAM files may have an index node size different from the DEC (perhaps 512 vs. 1K or 2K). >Yours, >Jonathan Leffler (johnl@obelix.informix.com) #include <disclaimer.h> -- Alan Denney aland@informix.com {pyramid|uunet}!infmx!aland Circle number 408 on Usenet Reader Service Card.