Abstract: A method for performing multi-caching on data sources of a same type and different types by using a cluster-based processing system is provided. The method includes steps of: a big data cluster management device (a) determining whether a result set, corresponding to a query result, is present as first cache data in master or worker nodes, (b) if specific part of the result set is absent, (i) establishing an execution plan (ii) acquiring a first subset in the master or the worker nodes, (iii) acquiring a second subset in none of the master and the worker nodes, and (iv) applying joint operation thereto, and (c) applying data processing operation and output operation thereto thus acquiring the result set as the query result.

Abstract: A method for performing multi-caching on data sources of a same type and different types by using a cluster-based processing system is provided. The method includes steps of: a big data cluster management device (a) determining whether a result set, corresponding to a query result, is present as first cache data in master or worker nodes, (b) if specific part of the result set is absent, (i) establishing an execution plan (ii) acquiring a first subset in the master or the worker nodes, (iii) acquiring a second subset in none of the master and the worker nodes, and (iv) applying joint operation thereto, and (c) applying data processing operation and output operation thereto thus acquiring the result set as the query result.

Abstract: A method for outputting a result of one or more operations using data sources of different types is provided. The method includes steps of: (a) when a user query is acquired, a device (i) acquiring data elements respectively from the data sources of different types by referring to the user query, and (ii) performing main joint operations on the data elements, to thereby generate data set; and (b) the device performing data processing operations and output operations on the data set, to thereby generate an answer for the user query. It has an effect of providing the method for outputting the result of the operations using the data sources of the different types by referring to each of languages corresponding to each of the data sources.