Question 1

How do I enable async support in redis-rs with tokio?

Accepted Answer

Add the 'tokio-comp' feature flag in your Cargo.toml: `redis = { version = "1.2", features = ["tokio-comp"] }`. Then, use the AsyncCommands or AsyncTypedCommands traits for non-blocking operations, and connections are cheaply cloneable for concurrent use.

Question 2

What's the difference between redis-rs and async-redis crates?

Accepted Answer

redis-rs is the mainstream, feature-rich client with sync and async support, while async-redis is a lesser-known alternative focused solely on async. redis-rs offers more comprehensive features like TLS, clustering, and JSON, but async-redis might be simpler for pure async use cases without extra dependencies.

Question 3

How to configure TLS for secure connections in redis-rs?

Accepted Answer

Enable the 'tls-native-tls' or 'tls-rustls' feature, and for rustls, install a crypto provider like `rustls::crypto::aws_lc_rs::default_provider().install_default()`. Use 'rediss://' URLs, and append '#insecure' for testing without certificate validation.

Question 4

Does redis-rs work with Redis Sentinel for high availability?

Accepted Answer

No, redis-rs does not natively support Redis Sentinel; it focuses on Redis Cluster for high availability. For Sentinel, you'd need to implement custom logic or use a different client that includes Sentinel support.

Question 5

How to use RedisJSON with redis-rs for storing JSON data?

Accepted Answer

Enable the 'json' feature and import the JsonCommands trait. Use methods like `json_set` to store JSON, but note that deserialization requires serde_json or the redis-macros crate for automatic handling, adding extra dependencies.

Question 6

Best practices for connection pooling in redis-rs async applications?

Accepted Answer

For async, use MultiplexedConnection which is cheaply cloneable and thread-safe, so a single connection suffices. Enable the 'connection-manager' feature for automatic reconnections, and avoid blocking commands on shared connections to prevent stalls.

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