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f1171803b5
Pass the last_replicas from the page_state as the preferred_replicas for query() and save the returned last_replicas as the last_replicas field of the next page_state. The circle is now complete. The first page of any query will pass an empty list as the preferred replicas (having no previous paging_state) so the replicas will be selected according to the load-balancing strategy. Any subsequent page will use the last replicas from the last page as the preferred ones for the current one. Thus if all goes well all pages of a query will hit the same replicas.