Is it possible to create and load records into a database then create a
secondary database(s)?
How would you recommend populating the secondary databases?
Should I scan through the database and update every record (with the
original value) to create the secondary database(s)?
Thanks

There is an option that allows you to tell BDB to do that automatically
for you. In Java, it's:

secondaryConfig.setAllowPopulate(true);

In C/C++ there mus be something similar...

Best,
Boris

Yes, this is possible. Just create an empty secondary database and
pass the DB_CREATE flag to the DB->associate call.

Regards,
Michael.

Is it possible to pass parameters to the call-back function used with
associate()?
How would you recommend creating a call back function for database
layouts that are dynamic (layouts that are not in a structure)?
Thanks

The database handle is passed to the callback, so you can hang
additional information from the DB->app_private field.

I'm not sure exactly what you're asking here, but the main thing to be
aware of is that your callback must return the same secondary for a
given (primary key, data) pair every time it is called. You can't
assume that the callback will only be called the first time the data is
inserted. For example, when you overwrite or delete a record, the
callback is called with the original values, and must return the
original secondary key.

Regards,
Michael.