Client Data Residency and Egress Mapping (Delivery)

Client Data Residency and Egress Mapping (Delivery)

1. 01

   Inventory every data source feeding the client warehouse and tag each with its physical region

   List CRM exports, ad platform pulls, product event streams, and third-party enrichment feeds. Record the hosting region for each source, not just the vendor name.

2. 02

   Map each source to the storage tier and region where the client contract permits it to land

   A European retail client may require EU-only residency while a US media client has no restriction. Document the permitted regions per source before any pipeline is built.

3. 03

   Calculate monthly egress volume for every downstream consumer of the warehouse

   Count BI dashboard refreshes, reverse-ETL syncs, and client-facing report exports. Egress is the line item that turns a flat storage quote into a variable bill.

4. 04

   Model the cost of the current topology against at least two alternative storage placements

   Compare a hyperscaler baseline against flat-rate object storage and a distributed S3-compatible option. Include API request fees, not just per-gigabyte storage rates.

5. 05

   Flag any source or consumer that crosses a residency boundary and escalate to the client's legal contact

   Cross-border transfers without a documented legal basis are the failure mode that ends retainers. Get written confirmation before the pipeline goes live.

6. 06

   Write the residency and egress assumptions into the delivery scope document with named owners

   State which team member owns each boundary check and what triggers a re-review, such as a new data source or a client expansion into a new market.

7. 07

   Schedule a quarterly re-map because source regions and client obligations both drift

   A vendor migration or a new state privacy law can invalidate the original map. Put the review on the account calendar rather than relying on memory.