Multiple-category large-flow parallel measuring method under high speed network environment

The invention relates to a multiple-category large-flow parallel measuring method under high speed network environment. The method comprises the following steps: 1) port mirror is set on a network device so that all the network messages passing through the device are copied and sent to a network monitoring front-end processor; 2) the front-end processor adopts TS-LRU algorithm and 1 hierarchical structure, each hierarchy contains constant storage units; the first hierarchy is used to store fine grain steam, when the storage units are not enough, one fine grain steam is selected through LRU strategy to eliminate; the other n-numbered hierarchies are used to store steam types to be measured, each hierarchy stores one kind of steams, the fine grain steams eliminated by the first hierarchy can be separately classified in the corresponding steams of the n-numbered hierarchies, when the storage units are not enough, one steam is selected through LRU-Size strategy to eliminate; and 3) when each measurement period en