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ClickHouse Kafka engine pipeline: the Kafka engine table events_queue is created successfully, messages pile up in front of it, and 0 rows reach the MergeTree table events
Database Infra

ClickHouse Kafka Engine: Secure Setup and 5 Silent Failures

Tested in November 2026 on ClickHouse 26.8 LTS and Kafka 3.9.1 (AutoMQ 1.7.4), AWS us-east-1 ยท A ClickHouse Kafka engine โ€ฆ

Dr. Somya Hallan Nov 10, 2026 35 mins read
Kafka replication factor 1 tested: disk-based Kafka shows Leader: none, S3-backed Kafka lost 0 acknowledged messages
Database Infra

Kafka Replication Factor: We Stopped Brokers at 1, 2 and 3

Set the Kafka replication factor too low and one lost disk takes your data with it. Set it too high โ€ฆ

Dr. Somya Hallan Nov 6, 2026 32 mins read
Kafka alternatives: drop-in replacements vs full rewrites
Database Infra

Kafka Alternatives: Drop-In Replacements vs Full Rewrites

Pick the wrong Kafka alternative and you rewrite every producer and consumer you own. Pick a drop-in replacement and you โ€ฆ

Dr. Somya Hallan Nov 5, 2026 24 mins read
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