FoundationDB

FoundationDB is a multi-model NoSQL database with a shared nothing architecture. It was designed around a "core" database, with additional features supplied in "layers”. It organizes data as an ordered key-value store and employs ACID transactions for all operations. FoundationDB is especially well-suited for read / write workloads but also has excellent performance for write-intensive workloads. Users interact with the database using an API language binding. FoundationDB provides amazing performance on commodity hardware, allowing you to support very heavy loads at low cost. NoSQL database design involves a number of fundamental technical alternatives. FoundationDB is designed to perform transaction processing with high performance at a scale. FoundationDB is horizontally scalable, achieving high performance per node in configurations from a single machine to a large cluster. All reads and writes in FoundationDB are accomplished using transactions. These transactions are fully ACID (Atomic, Consistent, Isolated, and Durable) and span multiple machines with high performance. FoundationDB’s isolation is the highest available; transactions appear to occur sequentially. FoundationDB’s durability is the strongest — all transactions are redundantly stored to disk before they are considered committed. FoundationDB stores each piece of data on multiple servers. If a server containing one of the copies is lost, FoundationDB will automatically heal, finding a new location for the lost copy. For read operations, clients communicate directly to the servers with the replicas, requesting a specific version to ensure a consistent view of the data. Clients can create transactional watches on keys to ensure that they are notified if the value changes. After a watch is registered, FoundationDB efficiently pushes change notifications to clients without polling.