analytics-dictionary / term / data infrastructure

Data replication

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

Written by Reflective Data experts · updated Oct 5, 2026

In analytics it usually means copying operational databases into a warehouse so that analysis does not slow the live application. Methods range from full table copies to change data capture.

Choose the method by table size and how fresh the copy needs to be.

Change data capture (CDC)Data ingestion Data warehouse

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Google Analytics Parallel Tracking

Parallel Tracking sends a second copy of your GA4 hits to your own data pipeline, so…

fivetran.md

Fivetran

Fivetran is a managed ELT service with connectors for many SaaS tools and databases.

apache-airflow.md

Apache Airflow

Apache Airflow is an open-source platform for authoring, scheduling and monitoring data workflows.

microsoft-azure.md

Microsoft Azure

Azure is Microsoft cloud platform, with data services such as Synapse, Data Lake Storage and Fabric.

data-latency.md

Data latency

Data latency is the delay between something happening and it being available for analysis.

data-retention.md

Data retention

Data retention policies define how long different data is kept before it is deleted or archived.

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