[ZODB-Dev] Using BerkeleyDB

[Richard Jones]

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[Apologies in advance - this will probably come across as a little 
rambling and this is the only vaguely relevant list I could find to 
send this message to...]

I'm on the hunt for an undo-less store to use in a new Zope app. I 
can't find a reference to a FileStorage-based one (I might have made 
that up in my own head) so I'm looking at the BerkeleyDB-based one.

I grabbed the latest bsddb3Storage-2.0beta2 and then hit another brick 
wall. I get the feeling that I'm being far too enthusiastic an early 
adopter...

I spent yesterday unravelling the new ZConfig-based configuration Zope 
and ZEO schemas (which resulted in a script that dumps the ZConfig 
schema to HTML - see 
http://mechanicalcat.net/cgi-bin/log/2003/06/02#zconfig_fooling for 
info if you're interested).

Some issues with the README that comes with bsddb3Storage-2.0beta2:

1. it has a section on "Requirements" which gives instructions on how 
to build PyBSDDB, but not how to build bsddb3Storage ...

2. in the section "Using bsddb3Storage with Zope", you refer to 
"docs/custom_zodb.py" - it's not in the tar file. It's also not the way 
to configure at the moment, but I'll assume that there's a migration 
still to be done. Given the missing file, I can't see how to configure 
the thing at all. The ZConfig schema dumper has helped a little, but 
the vars could use descriptions ;)

3. the Zope2.7 CVS's ZODB ZConfig schema refers to "BDBStorage" - but 
bsddb3Storage-2.0beta2 installs itself as "bsddb3Storage".

Having said that, I poked around the ZODB3 CVS for a while using 
viewcvs, and it appears that BDBStorage is in there. I get the feeling 
that it's going to replace  bsddb3Storage? If so, are there any hints 
as to using it?


     Richard
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