该代码是采用后缀匹配的经典结构化p2p模型，和chord相比具有更大的灵活性，是使用最多的经典模型之一，和pastry相似-The suffix code is used to match the structure of the classical model of p2p, and compared chord with greater flexibility, is to use one of the most classic model, and the pastry is simila