analytics-dictionary / term / data infrastructure

Backfill

A backfill loads or reprocesses historical data, for example after adding a new source or fixing a bug.

Written by Reflective Data experts · updated Oct 5, 2026

Good pipelines make backfills safe: running one twice should not duplicate data. Source APIs often limit how far back or how fast you can pull history.

Plan backfills before launching a pipeline so reports have history from day one.

Data ingestion Data pipeline Idempotency

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Data

Data is recorded information, such as numbers, text or events, that can be stored and analysed.

pii.md

Personally identifiable information (PII)

PII is any data that can identify a person, such as a name, email address, phone…

data-replication.md

Data replication

Data replication copies data from one system to another, to keep a second copy up to…

real-time-analytics.md

Real-time analytics

Real-time analytics analyses data within seconds or minutes of it being generated.

data-observability.md

Data observability

Data observability is monitoring the health of data and pipelines, so problems are found before users…

materialized-view.md

Materialized view

A materialized view stores the precomputed result of a query, so reports read it quickly instead…

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