Looking for GnuPG-compatible library for server application

[Nicholas Cole]

> But to be honest: I am not sure if gpg2 (with the mandatory gpg-agent
> instance to handle private keys) is suitable at all for a server
> environment where there are some 20'000 *private* keys (and counting).
> - From our experience gpg2 does not scale well with increasing number of
> private keys (although I have to admit that the project uses a very
> early GnuPG-2.1 implementation and not the latest from the unstable branch).

Pure curiosity on my part, I'll freely confess. But what sort of
application requires a server to handle 20,000 private keys?

Would there be any way to sensibly generate different keyrings, so
that gpg2 only ever had to deal with smaller groups of keys?

Nicholas