aioredis
Async Redis client for Python asyncio — provides non-blocking Redis operations in coroutines. aioredis 2.x was merged into redis-py 4.x as the async interface: from redis.asyncio import Redis. aioredis features: async/await Redis commands, connection pools, pub/sub with subscribe()/listen(), pipeline support, Lua scripting, streams, sorted sets, hashes, full Redis command coverage, SSL/TLS support, RESP3 protocol, and sentinel support. Note: standalone aioredis package is deprecated — redis-py 4.x+ is the recommended replacement with from redis.asyncio import Redis.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Always use TLS (ssl=True) in production for Redis connections. Use Redis ACL users (redis 6+) for fine-grained permissions. Never store sensitive data in Redis without encryption at application level — Redis is in-memory and not encrypted at rest by default. Protect connection strings — password in URL is plaintext.
⚡ Reliability
Best When
Async Python applications (FastAPI, aiohttp) needing Redis — redis-py 4.x asyncio interface is the modern replacement for standalone aioredis with full async support and active maintenance.
Avoid When
Synchronous code (use redis-py), non-Redis databases, or if still using aioredis < 2.x (upgrade to redis-py 4.x).
Use Cases
- • Agent async Redis — from redis.asyncio import Redis; r = Redis(host='localhost', decode_responses=True); await r.set('key', 'value'); value = await r.get('key') — modern aioredis usage via redis-py 4.x; agent async operations don't block event loop; same API as sync redis-py but awaitable
- • Agent async connection pool — from redis.asyncio import ConnectionPool, Redis; pool = ConnectionPool(host='localhost', max_connections=20, decode_responses=True); r = Redis(connection_pool=pool); await r.set('session:123', json.dumps(data), ex=3600) — shared connection pool; agent FastAPI app with multiple concurrent requests shares pool; max_connections limits Redis connections
- • Agent async pub/sub — from redis.asyncio import Redis; r = Redis(); async with r.pubsub() as ps: await ps.subscribe('agent_events'); async for message in ps.listen(): if message['type'] == 'message': process(message['data']) — async pub/sub listener; agent subscribes to event channel; listen() yields message dicts with type, channel, data keys
- • Agent async pipeline — from redis.asyncio import Redis; r = Redis(); async with r.pipeline(transaction=True) as pipe: await pipe.get('key1'); await pipe.get('key2'); results = await pipe.execute() — async pipeline batches commands; agent bulk reads execute atomically with MULTI/EXEC; transaction=False for non-atomic batching
- • Agent async cache with TTL — from redis.asyncio import Redis; r = Redis(decode_responses=True); async def get_cached(key, ttl=300): if (cached := await r.get(key)): return json.loads(cached); data = await fetch_from_db(key); await r.setex(key, ttl, json.dumps(data)); return data — async cache-aside pattern; agent checks Redis before database query; setex sets TTL atomically
Not For
- • Sync Python code — use redis-py (redis.Redis) for synchronous code; aioredis requires asyncio
- • Standalone package (aioredis<2) — aioredis was merged into redis-py 4.x; use from redis.asyncio import Redis instead of standalone aioredis
- • Non-Redis data stores — aioredis is Redis-specific; for async PostgreSQL use asyncpg, for async MySQL use aiomysql
Interface
Authentication
Redis AUTH via password= parameter. TLS via ssl=True or ssl_context. ACL users via username= + password= for Redis 6+. No OAuth — Redis-native auth only.
Pricing
aioredis/redis-py is MIT licensed. Free for all use. Redis server itself has various licensing (SSPL for 7.4+).
Agent Metadata
Known Gotchas
- ⚠ aioredis is deprecated — standalone aioredis package (versions < 2.0) is deprecated; modern usage is: from redis.asyncio import Redis (redis-py 4.x+); agent code with 'import aioredis' should migrate to redis.asyncio; pip install redis replaces pip install aioredis
- ⚠ decode_responses=True required for string values — Redis stores bytes by default; without decode_responses=True: await r.get('key') returns b'value' not 'value'; agent code comparing bytes to strings silently fails; set decode_responses=True at connection time for consistent string handling
- ⚠ Connection pool not automatically closed — async with Redis(...) as r: closes the connection but not the pool; agent code in FastAPI lifespan must: await pool.disconnect() on shutdown; leaked pools exhaust Redis connections over time especially in testing
- ⚠ pubsub listen() yields keepalive messages — async for msg in ps.listen() yields {'type': 'subscribe', ...} on subscribe and {'type': 'pong', ...} for keepalives; agent code must filter: if msg['type'] == 'message': process(); otherwise processes internal messages as data
- ⚠ pipeline in transaction mode requires WATCH — async with r.pipeline(transaction=True) as pipe: executes MULTI/EXEC; for optimistic locking: await pipe.watch('key'); value = await r.get('key'); pipe.multi(); pipe.set('key', new_value); await pipe.execute() — pipeline.watch() then get outside pipeline then multi(); common misuse causes transaction without watch
- ⚠ Async context manager required for pubsub — async with r.pubsub() as ps: ensures cleanup; ps = r.pubsub() without async with leaks subscription connections; agent code must use async with for pubsub, or explicitly call await ps.unsubscribe() and await ps.aclose() in finally block
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for aioredis.
Scores are editorial opinions as of 2026-03-06.