Josh Rubin wrote:
> I hope this question isn't too dumb, but why does backuppc need to use
> hard links?
> Of course, nobody wants to change a widely used program in a way that
> breaks everything,
> so this is really a question about some new, future program.
> Isn't the pool just a form of hash table that could be implemented lots
> of ways?
Creating a link is an atomic operation in the fileystem. With anything
else you would have to add the overhead of some locking mechanism (with
the potential for deadlocks) to be sure that the equivalent to the link
and the count of them stayed in sync. And, not too surprisingly it
turns out that filesystem operations are actually a pretty good way to
deal with storing files - it might not be impossible to do it better but
it wouldn't be easy.
--
Les Mikesell
lesmikes...@gmail.com
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