MongoCursor::setReadPreference Set the read preference for this query &reftitle.description; public MongoCursorMongoCursor::setReadPreference stringread_preference arraytags &reftitle.parameters; &mongo.setreadpreference.parameters; &reftitle.returnvalues; Returns this cursor. &reftitle.errors; &mongo.setreadpreference.errors; &reftitle.examples; <methodname>MongoCursor::setReadPreference</methodname> tag set array syntax example test->users->find(); // Prefer the nearest server in the "east" data center also used for reporting, // but fall back to a server in the "west" data center $cursor->setReadPreference(MongoClient::RP_NEAREST, array( array('dc' => 'east', 'use' => 'reporting'), array('dc' => 'west'), )); ?> ]]> &reftitle.seealso; The read preferences documentation. MongoCursor::getReadPreference MongoCursorInterface::setReadPreference