ScyllaDB NoSQL Database

A high-performance NoSQL database built in C++ on the Seastar framework, delivering single-digit millisecond latency at millions of operations per second across petabyte-scale deployments. The database serves enterprise customers including Discord, Comcast, Zillow, Rakuten, Hulu, Ticketmaster, Grab, Fanatics, Medium, and OpenSea, with 15,617 GitHub stars on its open-source core. Comcast migrated from Apache Cassandra achieving 3x throughput improvement while reducing node count by 80 percent, and Discord processes billions of messages daily with the database powering their real-time communication infrastructure. The shard-per-core architecture maps each CPU core to a dedicated set of database shards, eliminating lock contention and achieving linear scalability as cores are added, while the asynchronous I/O engine handles thousands of concurrent requests per thread without blocking. Capabilities include a built-in vector search engine optimized for billion-scale embeddings supporting RAG and agentic AI workflows, compatibility with the Cassandra Query Language and DynamoDB API enabling drop-in migration, time series ingestion for IoT and telemetry workloads, multi-region replication with tunable consistency levels, and a managed cloud service with automatic scaling. Benchmarks document 50 percent lower cost compared to DynamoDB for equivalent throughput, with predictable p99 tail latency maintained even during cluster topology changes and node failures.