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Using Apache Kafka from Go Nikolay Stoitsev, Software Engineer

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Trillion+ Messages/Day PBs Data Volume Tens of Thousands Topics

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Message Message Message Message Message Message Topic

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Partition - ordered, immutable sequence Message Message Message Message Message Message Message Message Message Message Message Message Message Message Message Partition 0 Partition 1 Partition 2

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Offset Message Message Message Message Message Partition 0 Offset: 1

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Offset Message Message Message Message Message Partition 0 Offset: 2

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Offset Message Message Message Message Message Partition 0 Offset: 2 Offset: 3 Consumer: 1 Consumer: 2

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Kafka Cluster

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Broker Broker Broker

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Broker Broker Broker P0 P0 P0 P1 P1 P1 P2 P2 P2 Partitioned and Replicated

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Broker Broker Broker P0 P0 P0 P1 P1 P1 P2 P2 P2 Producers Producer Producer

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Consumer Consumer Consumer Consumer Consumer Broker Broker Broker P0 P0 P0 P1 P1 P1 P2 P2 P2 Producers Producer Producer Consumer Group 1 Consumer Group 2

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Latency vs. Durability

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At-most-once cluster for logging

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At-least-one cluster for message bus

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Publishing to lossy kafka for logging

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log.Printf("failed to fetch URL %s", url)

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Structured logging

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https://github.com/uber-go/zap

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import "go.uber.org/zap"

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SugaredLogger

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Logger

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Publishing to lossless kafka

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Avro

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https://github.com/confluentinc/kafka-rest

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*net/http.Client

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Consume from kafka

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https://github.com/Shopify/sarama

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AsyncProducer and SyncProducer

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https://github.com/bsm/sarama-cluster

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Heartbeat

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Handles rebalancing

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Handles coordinator failure

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Thanks! Nikolay Stoitsev