But I do remember reading much of the source (trying to figure out why it didn't work) and thinking "this is pretty nice code".
An old thread about this: https://news.ycombinator.com/item?id=29290095.
They phased out BDB before DynamoDB was launched. Some time between 2007 and 2010. By the time DynamoDB launched as a product in 2012(?), BDB was gone.
Berkeley DBs were the go-to online databases for a long time at Amazon, at least until I left at the turn of the century. We had Oracle databases too, but they weren't used in production, they were just another source of truth for the BDBs.
But when I discovered Tokyo Cabinet and Tokyo Tyrant I almost literally fell in love. We used it for things that would have been impossible without it at the time.
Still worth checking it out: https://github.com/hthetiot/Tokyo-Cabinet
There's no shortage of embeddable key-value stores with C bindings like leveldb, rocksdb, or even gdbm, and all of them have worked better for me.
https://github.com/mechanicker/cramp
Later in ~2011, used BDB for indexing filesystem metadata at a large storage vendor for enhancing data management in a storage cluster.
Clean API with language bindings makes it easy to integrate with different languages.
