Hi Team, We are planning a MongoDB migration from a vendor-managed AWS account to a bank-managed AWS account. The source database has a single collection that contains data for all customers. Initially, we planned to use mongosync for full source-to-target migration. However, the current plan has changed: we need to migrate only around 100 friendly customers first, validate the migration, and then proceed with the full customer migration if everything looks good. Since the data for all customers is stored in the same collection, we are looking for guidance on the best approach to migrate only selected customer records from source to target. We also need to design a rollback plan because, after cutover, users may update data in the target database. Could anyone suggest a practical migration approach for this partial customer migration, including how to handle delta changes, validation, cutover, and rollback back to source if required? Thanks, submitted by /u/debasis_dba [link] [comments]