DATA ACCESS METHOD FOR NETWORK SYSTEM, NETWORK SYSTEM AND RECORDING MEDIUM

PROBLEM TO BE SOLVED: To provide a data access method capable of shortening latency. SOLUTION: Data are speculatively read out of a memory unit(MU) 30a inside a present node device 100a parallel with the read of tag information out of a tag memory 310. When the read tag information shows the absence of speculative read data in all cache memories 20a and 20b, these speculative read data are sent to a processor 10a inside the present node device 100a. When the read tag information shows the presence of speculative read data in the cache memory 20a or 20b, on the other hand, data existent in this cache memory 20a or 20b are acquired and sent to the processor 10a inside the present node device 100a and the speculative read data are abandoned.