What Valkey Does
- Full Redis compatibility — commands, protocol, data formats
- Data structures — strings, hashes, lists, sets, sorted sets, streams, bitmaps, HyperLogLog
- Persistence — RDB snapshots, AOF, hybrid
- Replication — primary-replica with automatic failover
- Cluster — hash-slot based sharding (16384 slots)
- Pub/Sub — channels and patterns
- Lua scripting — embedded Lua engine
- Streams — log-based data structure with consumer groups
- Modules — loadable module API (like Redis Modules)
- ACL — fine-grained access control
Architecture
Same as Redis: single-threaded event loop with io-threads for I/O (multi-threaded I/O available). Data stored in memory with optional disk persistence. Cluster mode splits keyspace across nodes using consistent hashing (16384 slots).
Self-Hosting
version: "3"
services:
valkey:
image: valkey/valkey:8
ports: ["6379:6379"]
volumes:
- valkey-data:/data
command: valkey-server --save 60 1000 --appendonly yes
volumes:
valkey-data:Key Features
- BSD 3-Clause (truly open source)
- Full Redis command compatibility
- Cluster and replication
- Persistence (RDB + AOF)
- Module API
- Streams with consumer groups
- ACL system
- Linux Foundation governance
- Active community development
- Drop-in Redis replacement
Comparison
| Store | License | Threads | Origin |
|---|---|---|---|
| Valkey | BSD 3-Clause | Single + IO threads | Redis fork |
| Redis | RSALv2 + SSPL | Single + IO threads | Original |
| DragonflyDB | BSL 1.1 | Multi (shared-nothing) | New codebase |
| KeyDB | BSD 3-Clause | Multi (shared) | Redis fork |
| Garnet | MIT | Multi | Microsoft new |
常见问题 FAQ
Q: 和 Redis 有什么区别？ A: 功能基本一致（从 Redis 7.2 分叉）。Valkey 保持 BSD 开源，Redis 改成了 RSALv2+SSPL（限制商用托管）。Valkey 8 开始有独立新功能。
Q: 能直接替换 Redis 吗？ A: 可以。Valkey 兼容 Redis 协议和数据文件。AWS ElastiCache/MemoryDB 已经默认切换到 Valkey。
Q: 谁在支持？ A: Linux Foundation 下的顶级项目。AWS、Google Cloud、Oracle、Snap、Ericsson 等公司贡献代码。多位前 Redis 核心开发者参与。
来源与致谢 Sources
- Docs: https://valkey.io/docs
- GitHub: https://github.com/valkey-io/valkey
- License: BSD 3-Clause