If you're going to ship Hypertable as part of a closed-source product,
you'll need to make any modification to Hypertable "per-se" open source.
In other words, all of the porting work you've done will need to be made
open source. As far as application code goes, here is our policy:
1. If you're building a non-database application, then we do not consider
that to be an extension of Hypertable and therefore you can ship your
product close-sourced without fear of GPL violation.
2. If you're building a database application (e.g. FonzyDB) then we do
consider that an extension of Hypertable and you'll need to obtain a
commercial license from Hypertable, Inc.
CEO, Hypertable Inc.