Glossary

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Glossary / Evaluation and implementation guide

Columnar Storage

Columnar storage keeps each table column together on disk instead of storing full rows side by side. Analytical queries usually read a few columns across millions of rows, so this layout scans far less data.

Compression also works better, since values in one column repeat and follow patterns.

A practical example

Example: an attribution query reads campaign_id, timestamp, and revenue from two billion events. A columnar warehouse touches only those three columns, while a row-based store would read every field of every row it scans.

What to evaluate before investing

  • Confirm the warehouse stores tables columnar by default, with no per-table tuning needed for event data.
  • Test compression ratios on a sample of your own event exports, not vendor demo numbers.
  • Check whether scanning a narrow column set on a large table bills noticeably less than a full-table scan.

Limitations and tradeoffs

Columnar layouts are poor for transactional writes that update one row at a time, so they complement rather than replace your CRM database.

Plan your next step with MeshLine

Connect this decision to your automation, organic marketing and customer lifecycle management. In a MeshLine demo, discuss your existing tools, the scope you need and how to measure the result.