Methods and apparatuses for data storage and retrieval have been provided. More specifically, a hash table is provided. The hash table comprises a first level slot array with a constant number of slots and at least one second level slot array with a variant number of slots. Each slot of the first level slot array is associated with a hash code range, and each slot of the first level slot array is linked to at most one second level slot array. Various operations, such as PUT, GET, RANGE_SEARCH of the hash table have been described. Moreover, a hash method has been provided for network management information to use the proposed hash table.