When search affinity is disabled, search head can search across all indexers across multiple sites.
But primaries on respective indexer information is provided to search head by indexer itself. If this is the case how search head searches primary copy only once eventhough it is present on two sites. How search head manages to search specific primary copy only one time if it is present on other site as well.
Is there any mechanism like S.H gets primary copy details from both sites indexers at first, then it will make decision which primary to search and accordingly intiate search on indexers?