Re: [Groff] Proper Small Caps.

[Doug McIlroy]

>  I am very interested in your opinion on what is best, given the trade off 
> between how many days to keep, how many to do each day (6, I think) and how 
> much space there is on the drive.

I wonder whether it would be practical to gradually thin nbackup coverage
going back in time, to make older files available without taking up
more storage. A natural thing to do would be to coalesce groups of adjacent
dumps when they get to a certain age, keeping just one version of each file
that changed more than once.

I find from poking around that each dump covers somewhat more
than 24 hours, so there is a lot of duplication to profit from.
I don't know, though, how storage is allocated for dumps. That
could make it hard to recycle storage for thinning. And of
course thinning would take time, too.

Incidentally, the reason I stumbled on the 7-day limit is
that I left some untested code changes just before a 10-day
vacation, and they were wrong. Questionable practice not to
keep a working copy. Will I every learn?

Doug