reader0 reader1 reader2 root admin administrator writer0 writer1 writer2 root admin administrator root admin administrator reader3 reader4 reader5 reader6 reader5 reader7 QUERY EXECUTE_CQ STOP_CQ CLOSE_CQ REGION_CREATE REGION_DESTROY GET REGISTER_INTEREST UNREGISTER_INTEREST KEY_SET CONTAINS_KEY PUT DESTROY REGION_CLEAR QUERY EXECUTE_CQ STOP_CQ CLOSE_CQ REGISTER_INTEREST GET UNREGISTER_INTEREST GET