1. Role of partition_key

Pulsar's partition_key is similar to Kafka's record key:

• Messages with same key will be routed to same partition (Depends on topic type and routing strategy)
• Affects "Ordering within Device" and "Parallel Throughput"

Recommend default partitioning by device:

{{device_id}}

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2. Throughput Tuning Suggestions

• Confirm platform side backlog first (Can consumer keep up)
• Enable batching for high throughput scenarios (See uplink producer parameters)
• Protect gateway stability with QueuePolicy.dropPolicy=Discard (Telemetry link)

See:

• Pulsar Uplink