MongoClient::setReadPreference Set the read preference for this connection &mongo.noalternative.method.note; &reftitle.description; public boolMongoClient::setReadPreference stringread_preference arraytags &reftitle.parameters; &mongo.setreadpreference.parameters; &reftitle.returnvalues; &mongo.setreadpreference.returnvalues; &reftitle.errors; &mongo.setreadpreference.errors; &reftitle.examples; <methodname>MongoClient::setReadPreference</methodname> tag set array syntax example setReadPreference(MongoClient::RP_NEAREST, array( array('dc' => 'east', 'use' => 'reporting'), array('dc' => 'west'), )); ?> ]]> &reftitle.seealso; The read preferences documentation. MongoClient::getReadPreference