We outline a small change to the Bitcoin mining protocol that rules out big, public mining pools. It preserves the current investment in Bitcoin by both existing users and by existing miners. It presents a fix to GHash's recent 51% excursion.
LevelDB is a popular data back end and in use at Google, Facebook,
and many startups. In this article we discuss some concurrency
improvements we've made to LevelDB as part of the HyperLevelDB