Implementing a Distributed NoSQL Database in a Persistent Distributed Ledger Service

IOTA uses Scylla to store unlimited amounts of data generated by IoT devices on the IOTA network. Scylla is an open source NoSQL database that provides shared-nothing architecture and LSM-based storage optimized for IOTA's needs. Key features of using Scylla include its ability to handle unlimited amounts of time series data from devices, dynamically add or remove nodes from the Scylla cluster supporting IOTA, and power the IOTA Tangle Explorer.