Real-Time Analytics Platform · View 08 of 21 · Data

Storage Zones, Tiering and Retention

Every store the platform owns, grouped by who owns it and whether it can be rebuilt — the view that answers what happens if a given store is lost.

Editable source SVG draw.io All views

Rebuildability

Bronze capture is the only zone that cannot be reconstructed from anything else
ADX tables, materialized views, silver and gold are all derivable from bronze
Losing the hot store costs a replay window, not data; losing bronze is terminal

Cost shape

Hot cache is the dominant cost line: 31 days at 3.5 TB/day is roughly 110 TB cached
Shrinking the hot window is the first cost lever and directly trades against query latency
Archive tier at 7 years is cheap; the cost there is rehydration time, not storage

Governance

Purview classifies columns; classification drives masking policy in the serving layer
Retention is expressed as an ADX policy and a blob lifecycle rule, never as a delete job
Customer-managed keys in Key Vault with 12-month rotation across every data zone

◀ Event Data Flow All views Analytics Data Model ▶