Architecture

• Clients communicate using a client library, which allows them to make calls such as the following

c_lib.put("john_doe", "balance", "0");
auto val = c_lib.get("john_doe", "balance")

• Client request are routed to single master
• The master applies a hash function, routing the request to the correct shard
• The master answers messages one at a time, as fast as it can hash to each shard
• Only one message per shard can be serviced at any one time. Additional requests are queued