Unfortunately unlikely. Shared nothing architecture works with messaging. So threads send each other messages like "give me the contents of that key" or "update

Unfortunately unlikely. Shared nothing architecture works with messaging. So threads send each other messages like "give me the contents of that key" or "update this key". Operations like SET/GET will require a single message hop. Operations like RENAME require 2 hops. Transactions and Lua scripts will require number of hops as number of operations in the transactions. When it's in the same process - the latency penalty in negligible. But between different machines - you will feel it. But who knows, AWS already have very cool UDP-like protocol with very low latency... if this will become the standard inside cloud environments maybe we can create a truly distributed memory store that spans multiple machines transparently.