2025 – 2026 · 25% ↓ Query latency · 100% parity
NS1 → NS2 Data Migration
Moved SQL and ETL for a national institutional supplier. Full parity. Lower latency.
Overview
Built at Aretove. Moved complex SQL and Talend jobs from NS1 to NS2 and proved the numbers still matched. Client name stays generic.
Challenge
Legacy Talend workflows and hand-tuned queries. Cutover had to be parity first, speed second.
Approach
Rewrite and test for parity, then cut latency, then retire old Talend paths on Azure SQL.
Outcome
100% parity. About 25% lower query latency on the new stack.
TalendAzure SQLETL
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