On Mar 21, 2006, at 11:41 AM, Jesus Cea wrote:

> You do need a way to avoid multiple copies of an already copied
> object.
> Yes, you can use a file on disk for keep that info around.

Yes, I forgot about that.

>
> Still, if I do a garbage collection of a 5 Gigabytes filestorage, I
> will
> need a temporal 5 gigabytes copyspace on disk. And remember, my
> storage
> is about 480 gigabytes, currently. No way I could do a garbage
> collection in the way currently durus backend works :-p : performance,
> time use, disk bandwidth and I can't afford a 480 mbytes temporal
> file...
>
> So the reference counters in the BerkeleyDB backend :-)

I understand.  And, the fact that your application works is impressive.
--

I asked about references between mailboxes before because I was
wondering if
you would benefit from using a separate database for each user, or maybe
some partition by groups of users would be practical.
I was also wondering if your message bodies are ever edited.
Is it important to keep them in the database?