Key Value Store (8)

• Docs (Docs) reference
  cache, JSON, streams and vector-search guides; source-available core, paid Software and Cloud tiers
  Caching Database Administration #
• Valkey (valkey.io) tool
  BSD-licensed Redis fork under the Linux Foundation: caching, queues or primary key/value store
  Caching High Availability #
• memcached - a distributed memory object caching system (memcached.org) tool
  in-memory key-value cache for database, API and render results to offload web backends; free and open source
  Caching Web Application #
• Apache Cassandra | Apache Cassandra Documentation (Apache Cassandra) tool
  Masterless wide-column NoSQL store: linear scaling, multi-datacenter replication, Apache-2.0
  Database Administration High Availability Wide Column Store #
• ScyllaDB For Real-Time AI (ScyllaDB) tool
  Cassandra- and DynamoDB-compatible wide-column store in C++ for low-latency, high-throughput workloads
  Wide Column Store #
• Arango Contextual Data Platform (Arango) tool
  graph-native multi-model store (document, key-value, search) pitched as an AI context layer, commercial
  Document Database Graph Database #
• etcd (etcd) tool
  Raft-replicated strongly consistent key-value store with watches and key TTLs; backs Kubernetes
  High Availability Kubernetes #
• Documentation versions (etcd) reference
  distributed key-value store holding Kubernetes cluster state; versioned documentation index
  High Availability Kubernetes #