# Best practices: Pub/Sub and Enhanced I/O Multiplexing
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When using Valkey or Redis OSS version 7 or later, we recommend using [sharded Pub/Sub](https://valkey.io/topics/pubsub/). You also improve throughput and latency using [enhanced I/O multiplexing](https://aws.amazon.com/memorydb/features/#Ultra-fast_performance), which is automatically available when using Valkey or Redis OSS version 7 or later and requires no client changes. It is ideal for pub/sub workloads, which often are throughput-bound with multiple client connections.