Abstract:According to the current method of constructing Fractional Repetition Codes (FRC), it is found that most of them are distributed storage systems based on isomorphism, but the actual storage systems often need to satisfy the characteristics of heterogeneity. To this end, this study proposes two methods for constructing heterogeneous FRC. One is a heterogeneous FRC constructed based on matrix transformation. This method is used to construct an FRC with a repeatability of 2 and a heterogeneous storage capacity of nodes. Compared with the existing isomorphic FRC constructed by regular graphs, it has the advantages of lower computational complexity and more in line with the real storage system. In addition, this study also proposes a method of constructing FRC using adjustable rings, which FRC is constructed with a repeatability of 2 or 3, which can obtain the FRC of the node storage capacity is isomorphic, and can also get the heterogeneous FRC. Compared with the existing FRC, it is found that the FRC constructed in this study has heterogeneous characteristics in node storage capacity, good repair locality, and low computational complexity of the construction algorithm. It can select parameters in a wide range and the construction structure is simple and intuitive.