Re: Configuration Management for Ada on Unix

[st92j0gw@dunx1.ocs.drexel.edu (Chris Papademetrious)]

pautet@email.enst.fr (Laurent Pautet) wrote:
>Maybe I am wrong, but I think SCCS is very unefficient because it
>stores patches between Version (N+1) - Version (N) and when you want
>to access to version N, internally SCCS retrieves version 0 and
>applies all the patches to obtain version N. RCS stores the last
>version (rather than the first one) and differences between Version
>(N) - Version (N+1).

 This inefficiency has a nice advantage, though.  Let's say you have
three modifications, A, B, and C, which affect the original version of
a program.  Using the method which stores only *modifications* to the
base file, you can selectively create a version which incorporates
only the modifications A and C, while leaving out those in B.  With
the way RCS works, the changes in B are inherently a part of C, and
cannot be bypassed.

 This can be VERY handy when many people make changes often to a large
body of source files.

>-- Laurent
 
 - Chris