I want to know how “Resumable Initial Sync” works. Fault Tolerance Starting in MongoDB 4.4, a secondary performing initial sync can attempt to resume the sync process if interrupted by a transient (i.e. temporary) network error, collection drop, or collection rename. The sync source must also r…

Hi @Kim_Hakseon You can find some more technical details in the Data Cloning section of the Replication Internals documentation and should answer your question. Dan