GnuPG-based login performance issue

[daniele-athome]

I already tested with mixed Kontalk 2.x and 3.x servers on the same host that concurrent accesses to the same keyring causes crashes, so using multiple contexts on the same keyring won't work.
Also, when keyrings get big (as in very big), GnuPG performance degrades like hell.

Crazy thing to make concurrent calls to GnuPG

Waiting to implement an efficient GnuPG library implementation...

Since GnuPG is currently used as a key/value storage (where keys are fingerprints), the key space can be splitted (e.g. 16 GnuPG home directories for each first hex digit of the fingerprint; for what is worth, every even number from 2 to 16 will do).
By using multiple keyrings, fingerprint key space can be splitted in many parts and GnuPG operations can happen on multiple contexts simultaneously.

• configuration parameter for number of partitions
• splitted keyring implementation, transparent to the caller (make an interface to the standard gnupg-for-java methods)
• shell script for converting unified keyring to splitted keyring

[daniele-athome]

Closed with 95b7089.