Define the first traffic path to move and the evidence that will show it works. A migration must preserve more than a reachable endpoint: partner identities, request fields, accepted events, reporting periods and operating responsibilities all need an agreed destination. This guide is a planning framework; migration scope, tools, downtime and recovery depend on the actual systems and partner contracts.
Inventory the current path
Trace one source through its endpoint, parser, routing rules, delivery or tracking events and reports. List dependent databases, caches, scheduled imports and external callbacks, with a responsible owner for each. Record identifiers, field types, timezones, currencies and retention needs. Keep credentials in their approved secret store; an inventory should reference their owner and purpose rather than copy their values into a shared document.
- Traffic contracts: required fields, accepted sources, timeouts, limits and response semantics.
- Data contracts: account and partner mappings, historical records, exports and reporting definitions.
- Operations: service URLs, DNS ownership, dependencies, maintenance contacts and change windows.
Choose the first boundary
Select a source or channel whose eligibility, volume and commercial responsibility can be bounded. Identify how traffic will reach the destination and how it can return to the previous path. Confirm provider approval and compatibility before moving requests. A Nexus module does not imply a ready-made importer for an arbitrary legacy database; field mapping, adapters and historical-data migration require explicit scope and validation.
- Name the traffic cohort, destination, partner approvals and cutover owner.
- Mark dependencies that must move together and those that can remain temporarily.
- Agree on a stop condition and the person authorized to act on it.
Validate before expansion
Rehearse with synthetic or appropriately redacted samples. Cover valid and invalid requests, absent demand, timeouts, repeated tracking events and permission failures. Compare reports for the same cohort, period and definitions; local counts and partner NET imports may update at different times. Do not duplicate live auctions, clicks or billable events merely to compare systems. Any replay or parallel observation needs an agreed method that avoids double delivery and accounting.
- Document the expected outcome and evidence for each test case.
- Reconcile missing, duplicated and late events before accepting the sample.
- Treat interface availability and successful HTTP responses as partial checks, not complete delivery evidence.
Cut over with a bounded observation window
Where the routing and partner setup allow it, begin with a limited traffic cohort and observe it before increasing exposure. Agree on the measurements and tolerances in advance: request errors, timeouts, accepted outcomes and reporting discrepancies for that cohort. Google’s SRE canary guidance explains this general release technique; it is not evidence that Nexus supplies automatic traffic splitting or rollback for your deployment. If traffic cannot be divided safely, agree on a maintenance window and a different acceptance plan.
- Capture the active configuration and approved destination before the switch.
- Keep the earlier path available for the agreed recovery window when technically feasible.
- Compare like-for-like traffic and account for partner reporting delay before increasing exposure.
Plan rollback separately from data recovery
Write down the exact trigger, decision owner and steps to restore the previous traffic route. Also determine what happens to records created after cutover: changing routing alone does not undo new conversions, payments, configuration changes or data transformations. Test backup restoration and any reconciliation procedure before depending on them. Agree on acceptable data loss and recovery time for this migration; this guide provides no default guarantee of zero downtime or reversible database changes.
- Check that the previous service still accepts the required contracts and configuration.
- Decide whether writes must pause and how new, pending and late records will be reconciled.
- Keep recovery artifacts protected and record the outcome of the rehearsal.
Close the handover before retiring the old path
For an illustrative XML migration, the handover might name one publisher source, its approved demand feed, the retained SubID convention and the reports used to compare accepted clicks. Add the actual observation period, discrepancies and sign-off owners when evidence exists. Retire the earlier endpoint only after callbacks, partner imports, access, retention and recovery needs have been resolved. These are planning steps, not a recorded customer migration or an included fixed-price service.
- Confirm operational contacts, monitoring ownership and the escalation procedure.
- Preserve required historical records and remove obsolete access through the agreed process.
- Bring the dependency inventory and acceptance criteria to a scoped deployment or migration enquiry.
This guide describes Nexus product architecture and general AdTech operating concepts. Exact enforcement and integration behavior depends on the enabled revenue engine and agreed deployment configuration.
Published by Nexus Soft.
Content revised
Sources and product scope
Product references describe available controls and their limits. Examples are illustrative.