Legacy ETL modernization with recovered business rules and controlled retirement

The inventory covers pipelines, jobs, scripts, SQL, procedures, notebooks, files, control tables, schedules, parameters, secrets, source and target structures, reports, models, consumers, service levels, incidents, costs, and owners. It connects job dependencies, data movement, triggers, shared code, identities, critical windows, quality checks, and manual recovery steps.

BluePi combines code analysis, runtime logs, schedules, data samples, control records, incident history, report outputs, and operator interviews.

• Mappings, filters, joins, aggregations, and calculations
• Incremental, full-load, history, correction, and delete behavior
• Reference data, control tables, parameters, and calendar assumptions
• Null, default, rounding, and precision rules
• Error handling, retries, restart position, and backfill
• Manual adjustments, accepted exceptions, and known defects

Each pipeline receives a retire, consolidate, translate, refactor, replace, rebuild, or defer treatment. The target contract defines inputs, outputs, keys, grain, schema, semantics, incremental behavior, orchestration, checkpoints, quality, failure handling, recovery, service targets, access, deployment, rollback, and owners.

SmartMigrate can assist with supported inventory, parsing, dependency analysis, complexity scoring, and conversion. Generated output retains the source reference, parsed behavior, target output, tool and rule version, warnings, unsupported constructs, confidence, review state, engineer decision, exception owner, and retest result. Engineers own business meaning, target design, orchestration, performance, security, and exceptions.

Layered validation covers mappings and rules, data reconciliation, semantics and consumer outputs, orchestration and recovery, performance, service behavior, security, operations, and cost.

Where required, source and target run in parallel with aligned inputs, source position, schedules, parameters, and comparison windows. Each run records source output, target output, tolerance, difference, known exception, owner, resolution, and retest. Exit criteria define coverage, acceptable differences, critical-window behavior, user approval, and comparable-run requirements.

The cutover runbook covers source and target freeze, final source position, data load, schedule and trigger transfer, checkpoint and control-table transfer, final reconciliation, approval, routing and credential changes, monitoring, rollback, point of no return, communication, and incident response.

Legacy jobs retire only after downstream dependencies move, retention needs are resolved, schedules and credentials are disabled, duplicate writes are prevented, consumers are notified, and the decision is recorded. Repositories, mappings, behavior records, exceptions, tests, evidence, runbooks, dashboards, deployment paths, and support ownership transfer to the target team.