What is your approach to a complex ServiceNow migration?
I’d like to hear from architects and practitioners who have worked on large ServiceNow migrations.
Suppose an organization is migrating from one ServiceNow instance to another with:
> Large CMDB
> Multiple integrations
> Custom applications
> Discovery and Service Mapping
> Complex CI relationships and dependencies
> Significant historical data
How would you approach the migration?
> Would you migrate everything or selectively migrate data?
> Would you clean the CMDB before migration or after?
> Would you migrate foundation data first?
> How would you preserve CI relationships and references?
> What approach or tools would you use for large-volume data migration?
>How would you validate source vs. target data?
> How would you handle integrations during cutover?
> What would your rollback strategy look like?
Most importantly, what is one migration mistake you would never repeat?
I’m particularly interested in real project experiences and lessons learned, rather than only the theoretical approach.
