摘要:
Provided are a system and a method for indexing high-dimensional data in parallel in a cluster environment. The system for indexing high-dimensional data in parallel in a cluster environment includes a Spill-tree creation means for creating a Spill-tree using an sampled N-dimensional feature vector, a feature vector division storage means for distributedly storing the N-dimensional feature vector in a terminal node of the Spill-tree, and a local signature creation means for creating and managing a local signature for the N-dimensional feature vector dispersed into each node of the Spill-tree.
摘要:
Provided are a content-based searching method and system for multimedia objects using a high-dimensional feature vector data based on a 2-level signature. The method for searching the high-dimensional data using a signature file includes calculating a first-level query signature and a second-level query signature by using the query feature vector, performing a first filtering operation to obtain a primary candidate cell group by searching a second-level signature file, and performing a secondary filtering operation to obtain a secondary candidate cell group having a high similarity in a primary candidate cell group. Accordingly, the high-dimensional data searching method and system can process a query quickly and accurately and can increase the searching accuracy by using an enhanced signature of the query feature vector.
摘要:
Provided are a content-based searching method and system for multimedia objects using a high-dimensional feature vector data based on a 2-level signature. The method for searching the high-dimensional data using a signature file includes calculating a first-level query signature and a second-level query signature by using the query feature vector, performing a first filtering operation to obtain a primary candidate cell group by searching a second-level signature file, and performing a secondary filtering operation to obtain a secondary candidate cell group having a high similarity in a primary candidate cell group. Accordingly, the high-dimensional data searching method and system can process a query quickly and accurately and can increase the searching accuracy by using an enhanced signature of the query feature vector.
摘要:
Provided is a stream data processing system and method for avoiding duplication of data process. The system including: an evaluation result storing unit for updating and storing a query condition evaluation result; a window evaluating unit for performing window evaluation; a data separating unit for separating data into new data and duplication input data; a reuse result extracting unit for receiving duplication input data from the data separating unit and extracting a query condition evaluation result; a query condition evaluating unit for receiving new data from the data separating unit, performing query condition evaluation and creating a query condition evaluation result; and a result organizing unit for receiving the query condition evaluation result, merging, outputting and transmitting the query condition evaluation result to the evaluation result storing unit.
摘要:
Provided is a stream data processing system and method for avoiding duplication of data process. The system including: an evaluation result storing unit for updating and storing a query condition evaluation result; a window evaluating unit for performing window evaluation; a data separating unit for separating data into new data and duplication input data; a reuse result extracting unit for receiving duplication input data from the data separating unit and extracting a query condition evaluation result; a query condition evaluating unit for receiving new data from the data separating unit, performing query condition evaluation and creating a query condition evaluation result; and a result organizing unit for receiving the query condition evaluation result, merging, outputting and transmitting the query condition evaluation result to the evaluation result storing unit.
摘要:
A cache consistency maintenance procedure to select one of a detection-based cache consistency maintenance procedure optimized for record-based locking and an avoidance-based consistency-based maintenance procedure optimized for table and block-based locking. To support the characteristic of DBMS in which table locking and record locking are consistent to access the same table, the two kinds of the consistency maintenance policies for the same block are processed by a single buffer load process and the two kinds of the consistency maintenance policies are consistent with each other to provide better configuration and performance.
摘要:
Provided are a system and a method for processing integrated queries against an input data stream and data stored in a database using trigger. The system for processing an integrated query against an input data stream and data stored in a database using a trigger, including: a data stream manager for managing a continuously inputted data stream; a trigger result manager for registering a trigger in a database which interworks with the trigger result manager and forming a set of results that are obtained by executing the registered trigger to thereby provide the set of results in real time; and an executer for processing an integrated query against the data stream from the data stream manager and data stored in the database, wherein the integrated query is processed by referring to the set of results from the trigger result manager for the data stored in the database.
摘要:
Provided are a system and method for processing continuous integrated queries on both data stream and stored data using user-defined shared trigger. The system includes a data stream manager for managing data stream inputted from outside; a continuous integrated queries manager for managing the continuous integrated queries inputted from an external application; a trigger manager for managing the user-defined shared trigger inputted from the external application and registering the user-defined shared trigger in an external database; a trigger result manager for forming and managing a trigger result set from a performance result of the user-defined shared trigger registered in the cooperation database; and a continuous integrated queries performer for processing the continuous integrated queries referring to the transmitted data stream and trigger result set.
摘要:
Provided is a system and method for updating a plurality of the same files consistently. The file update system comprises a first and a second data servers formed as pipe line type network for storing an original file and a duplicate file of the original file respectively, and for updating both the original file and the duplicate file in response to an update request, wherein the first and the second data servers mutually exchange file update information, correct the file update information so as to prevent overlapped update due to a plurality of update requests for the same file, and then update the original file or the duplicate file according to the corrected file update information.
摘要:
Provided are a network scheduler and a network scheduling method capable of effectively managing network bandwidths by selectively supporting a work conserving mode to network entities by using an improved token bucket scheme. The network scheduler selectively supports a work conserving mode to network scheduling units (NSUs) serving as network entities by using a token bucket scheme, such that the network scheduler ensures an allocated network bandwidth or enables the NSUs to use a remaining bandwidth. The network scheduler manages the NSUs by classifying the NSUs into a green state, a red state, a yellow state, and a black state according to a token value, a selection/non-selection of the work conserving mode, and an existence/non-existence of the packet request to be processed.