ZippyDB offers a lot of flexibility to applications in terms of tunable durability, consistency, availability, and latency guarantees, which has made the service a popular choice within Facebook for storing both ephemeral and nonephemeral small key-value data. Since we first deployed ZippyDB in 2013, this key-value store has expanded rapidly, and today, ZippyDB serves a number of use cases, ranging from metadata for a distributed filesystem, counting events for both internal and external purposes, to product data that’s used for various app features. ZippyDB is the largest strongly consistent, geographically distributed key-value store at Facebook.
