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Posts by Tom Schreiber

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Engineering

If it’s in your catalog, you can query it: The DataLakeCatalog engine in ClickHouse Cloud

Tom Schreiber · Oct 15, 2025

494080434 75bfc47f 9956 43ed 94dd f29e6487a2da

Engineering

How we scaled raw GROUP BY to 100 B+ rows in under a second

Tom Schreiber · Sep 29, 2025

clickhouse vs postgresql update findn

Engineering

You can’t UPDATE what you can’t find: ClickHouse vs PostgreSQL

Al Brown and Tom Schreiber · Aug 13, 2025

fast updates in clickhouse 6s

Engineering

How we made ClickHouse UPDATEs 1,000× faster (Part 3: Benchmarks)

Tom Schreiber · Aug 7, 2025

7x2 patch

Engineering

How we built fast UPDATEs for the ClickHouse column store – Part 2: SQL-style UPDATEs

Tom Schreiber · Jul 24, 2025

467514815 75613b7c 54c0 4a25 a7e4 45cb9bfe83a5

Engineering

How we built fast UPDATEs for the ClickHouse column store – Part 1: Purpose-built engines

Tom Schreiber · Jul 22, 2025

blog shared catalog 000

Engineering

No more disks: the architecture behind stateless compute in ClickHouse Cloud

Tom Schreiber · Jul 9, 2025

7tuned

Engineering

Join me if you can: ClickHouse vs. Databricks vs. Snowflake - Part 2

Al Brown and Tom Schreiber · Jun 25, 2025

Engineering

Join me if you can: ClickHouse vs. Databricks vs. Snowflake - Part 1

Al Brown and Tom Schreiber · Jun 24, 2025

446559747 9d77c836 9abd 458b 95fe 5de1e15bb634

Engineering

Building a Distributed Cache for S3

Tom Schreiber · May 28, 2025

blog chandparquet 202504 fnl

Engineering

ClickHouse and Parquet: A foundation for fast Lakehouse analytics

Tom Schreiber · May 7, 2025

blog chlazymaterialization 202504 v2 1

Engineering

ClickHouse gets lazier (and faster): Introducing lazy materialization

Tom Schreiber · Apr 22, 2025

blog introducingthequeryconditioncache 202503 v1 0

Engineering

Introducing the query condition cache

Tom Schreiber · Mar 28, 2025

blog acceleratingqueriesjsonbluesky 202503 v2

Engineering

Accelerating ClickHouse queries on JSON data for faster Bluesky insights

Tom Schreiber · Mar 19, 2025

blog inputformatmatchup 022025 fnl 1

Engineering

ClickHouse Input format matchup: Which is fastest & most efficient

Tom Schreiber · Feb 26, 2025

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