BIG DATA STATISTICS AT DATA-BLOCK LEVEL

摘要

System and method for storing statistical data of records stored in a distributed file system. In one aspect a statistical data block is allocated in a memory of a data node for storing statistical data of records stored in a storage disk of the data node. Each data block of the plurality of data blocks in the data node has a respective entry in the statistical data block, which is collocated with data blocks on the data node. Statistical data of records stored in the distributed file system are collected, and written to statistical data block in the memory of the data node.