Data Engineering

ClickHouse OLAP in 2026: Sub-Second Aggregations Over Billions of Telemetry Rows

A deep database engineering guide to ClickHouse columnar storage architecture. We examine vectorized SIMD query execution, sparse primary indexing, MergeTree family engines, and real-time analytical dashboard optimization.

Sachin Sharma
Sachin SharmaCreator
Sep 2, 2026
2 min read
ClickHouse OLAP in 2026: Sub-Second Aggregations Over Billions of Telemetry Rows
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A deep database engineering guide to ClickHouse columnar storage architecture. We examine vectorized SIMD query execution, sparse primary indexing, MergeTree family engines, and real-time analytical dashboard optimization.

Sachin Sharma

Sachin Sharma

Software Developer & Mobile Engineer

Building digital experiences at the intersection of design and code. Sharing weekly insights on engineering, productivity, and the future of tech.