7x faster Iceberg ingestion, how we redesigned OLake's writer
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OLake is our open-source tool for ingesting Database & Kafka data into Apache Iceberg. We recently redesigned the write pipeline and saw ~7x throughput improvements. Sharing the architecture decisions, trade-offs, and benchmarks.
HN · launched Dec 5, 2025 · 5 upvotes (top 90%) · 0 views
Niche: specialized algorithms and computing libraries · 230 launches, 4 in the last 7 days ▼ -73% · Explore this niche →
Category and tags
- Horizontal
- Data infrastructure
- B2B
- Not AI
- Commercial product
Visit website ↗ Source listing ↗
More like this: all 230 launches in specialized algorithms and computing libraries →
Could you build this?
No Redesigning an ultra-high-throughput ingestion pipeline for Apache Iceberg and Kafka requires deep database internals, concurrency engineering, and low-level data lake format expertise.
What it would actually take: The system requires an optimized Go or Rust engine interfacing directly with Apache Iceberg metadata specifications, parquet writing, and Kafka/CDC consumers. The core challenge lies in high-concurrency buffering, zero-copy serialization, atomic multi-partition commits, and exactly-once semantics without introducing file-compaction thrashing. This demands senior distributed systems and data engineering expertise.
Discussion
1 comment analyzed.
Competitors mentioned: Apache Airflow, Kafka, dbt, Fivetran
Concerns raised: Memory usage scaling (44-59 GB on 128 GB VM), Benchmark fairness (comparing against unnamed alternative tools), Production stability at scale, Real-world constraint handling
Feature requests: S3/GCS/HDFS ingestion optimization details, Schema evolution best practices documentation, Multi-source parallel ingestion, Dead letter queue handling for failed records
Competitors
Other products that read as similar to this one : 72 launches clear the similarity bar, closest 8 shown.
Attention rank: #71 of 73 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 37 days after the earliest competitor.
- Penca · hn · 2026-07-31 · 14 upvotes · similarity 0.47
- Public Apache Iceberg datasets via a REST catalog · hn · 2026-01-15 · 13 upvotes · similarity 0.42
- kafuck · github · 2026-11-10 · 66 upvotes · similarity 0.40
- DuckDB for Kafka Stream Processing · hn · 2025-12-08 · 77 upvotes · similarity 0.39
- IceGate · hn · 2026-04-13 · 15 upvotes · similarity 0.39
- KDBS · ph · 2026-10-16 · 1 upvotes · similarity 0.39
- Optimize Databricks SQL · hn · 2025-10-29 · 6 upvotes · similarity 0.39
- Walrus · hn · 2025-12-01 · 160 upvotes · similarity 0.38
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