Hello, Ann,

> Thinking about it some more, I think we'd be better off restricting the
> primary header to a single page and giving an error if someone attempts
> to add a clumplet that won't fit.

I haven't thought of this option. Given this restriction I surely can
safely use header clumplets to store difference file name. This is why
I like to discuss things in fb-devel and ib-architect. Combined wisdom
of gurus living there makes elegant solutions to all problems. :)

> I talked over the problem with Jim, describing the difference file
> technique for stabilizing the database so it can be backed up with
> system utilities. His reactions were "Hmm... not a bad idea" - which is

The best thing is that what I described already works at least on
Linux CS. Other platforms are not tested yet. Now I'm finalizing
first version of incremental backup utility.

> high praise - and "You know, that scheme could be used to distribute a
> read-only database with a read-write wrapper."

This is a matter of 30 minutes work to add DPB parameter for
difference file name and allow auto-creation of difference file
if it was specified via DPB parameter. Hey folks, do you need
this feature ?

> Ann

Nickolay Samofatov