| 摘要 |
A data reading method and device. The data reading method comprises: during a process of scanning an index clustering table, scanning leaf nodes and recording page numbers of the leaf nodes (S10); and merging I/O requests of the leaf nodes with consecutive page numbers into one I/O request (S11). Because data of multiple leaf nodes in physically consecutive storage locations is read by means of one I/O request, the data volume read by each I/O request is increased, thereby fully utilizing the overall disk throughput. In addition, to read data of the same storage volume, the number of I/O requests that need to be initiated can be reduced, thereby avoiding the limitation of the disk IOPS parameter, and effectively improving the data reading efficiency. |
