Overview
JNE Express needed to relocate production database workloads from a legacy data center to a new facility. Some servers shared the same endian format as the target hardware; others required a cross-endian migration. Either way, downtime had to be kept to a tight cut-off window during low-traffic hours.
Approach
Same-endian path — Oracle Data Guard switchover
- Created Oracle Data Guard (ODG) with the old DC as primary and the new DC as standby.
- Verified that ODG was fully synchronized and gap-free before initiating the switchover.
Cross-endian path — Data Pump migration
- For databases moving from big-endian to little-endian platforms, executed migration via Data Pump export/import.
- Handled data lag during the export-import window with scheduled jobs and procedural catch-up.
Cut-off and validation
- After confirming zero lag, performed the production cut-off and DB switchover to the new data center.
- Verified connectivity and access from every dependent service.
- Ran stress tests and load tests against the new environment.
- Delivered post-migration documentation and evaluation reports.
Outcome
Both migration paths completed within their cut-off windows. The new data center took over production traffic without data loss, and performance benchmarks met or exceeded the baseline.