+−⟲ client chubby tablet server1 tablename -> metadata tablet location root tablet location (tableName, row key, column ....) tableName Root tablet metadata tablet location tablet server2 tabletN: [start row key, end row key] ->. tablet location metadata tablet row key tablet location 2.根据row key找到所属tablet分配的server tablet server3 memtable + sstable列表 tablet 1.根据表名找到这个表的metadata tablet column family,column等信息 数据 3.根据row key, column key等查询指定的数据