Checking Whether the Source Database Collections Contain TTL Indexes
During MongoDB migration, due to inconsistency of time zones and clocks between source and destination databases, migrating TTL indexes will cause data inconsistency. DRS checks whether the source database contains collections with TTL indexes. If yes, delete the TTL indexes or do not migrate the collections with TTL indexes.
Item to Be Confirmed
If the objects to be migrated contain TTL indexes, due to inconsistency of time zones and clocks between source and destination databases, migrating TTL indexes will cause data inconsistency.
Handling Suggestion
If data consistency is required, delete TTL indexes. Alternatively, do not migrate the collections containing TTL indexes.
Run the following command to delete an index:
run the db.Collection name.dropIndex(Index name)
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