Network environment adaptive coding method and system for ubiquitous storage system

The invention belongs to the technical field of computer storage, and particularly relates to a network environment adaptive coding method and system for a ubiquitous storage system. The method comprises the following steps: S1, expanding erasure code parameters on the basis of RS erasure codes; s2, modeling by adopting a finite discrete time Markov chain, and carrying out a data restoration process; s3, the bandwidth overhead proportion and the data loss rate occupied in the data restoration process are estimated, and the optimal restoration bandwidth overhead and slow node distribution are obtained; s4, adaptively adjusting erasure code parameters according to a network environment through an EAP algorithm to obtain optimal erasure code parameters for maintaining expected persistence; and S5, through an ORP algorithm, according to the condition of the current node jitter rate and the slow node proportion of the ubiquitous storage system, obtaining the optimal erasure code parameter which has the lowest repa