Dragonfly

Dragonfly is an in-memory data store for modern application workloads. It is compatible with the Redis and Memcached APIs, so existing applications can switch to it without code changes. Its multi-threaded design lets it scale vertically across all the cores of a machine.

The project reports up to 25 times the throughput of legacy in-memory stores, higher cache hit rates with lower tail latency, and up to 80% fewer resources for the same workload. Its README publishes the benchmark setup behind those numbers. It runs with Docker or from source, and a managed Dragonfly Cloud is also offered.

Dragonfly is a drop-in option for teams whose Redis or Memcached setup has outgrown a single thread, without rewriting application code. Its license limits production use, explained below.

Dragonfly uses the Dragonfly Source-Available License, not an open-source license. You can use, modify and build it into your own products at no cost up to 100 vCPUs in production across all your instances; beyond that you need a commercial license. You can't distribute or offer it as a standalone database, cache or similar service.

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dragonflydb/dragonfly

• RedisThe widely used in-memory data store Dragonfly is compatible with.
• MMemcachedOpen-source in-memory caching system.
• Amazon ElastiCacheAWS's managed Redis and Memcached service.