Storage network structure based on the Peterson graph and data read-write method thereof

A data read-write method of a storage network structure based on the Peterson graph, in which the said storage network structure based on the Peterson graph includes a primary distributed storage network and a storage network based on the Peterson graph, is characterized of including a method used by applications to write data and a method used by applications to read data, in which the said applications are the entities except the storage network, such as a software, an application program or a client program,

• and the said method used by the applications to write data includes following steps:
• 1) the said applications send a data-write request carrying with the QoS (quality of service) parameters, wherein the said request includes the QoS parameters, the data identity and the data, the said QoS parameters are defined as two metrics, the data reliability metric and the data type metric, each of which may be defined into the several classes;
• 2) the said storage network receives the said data write request, which one central node of the storage network or one node of the distributed storage network receives the said data write request sent by the said applications,
• wherein the said central node refers to a specific server addressed by dns (domain name service) or the alternative addressing method, and all of the data write requests are delivered to this central node;
• 3) the said storage network resolves the said data write request, which includes resolving the QoS parameters into the data reliability metric Rapplication and the data type metric Tapplication;
• and
• 4) the said storage network executes data-writing, which includes the operations of metadata writing and media data writing by the said primary distributed storage network, wherein in case of RDHT<Rapplication, the Peterson graph-based storage network executes both metadata writing and media data writing, and the said RDHT is the reliability metric of the primary distributed storage network,
• wherein the said data read method consists of:
• 1) the step of addressing and locating the metadata, which may be performed simultaneity in the primary distributed storage network and the Peterson graph-based storage network, wherein the first returned response is the result;
• and
• 2) the step of reading the media data, in which after obtaining the metadata, in the case that the media data contains the multiple storage nodes, the performances in terms of the delay and available bandwidth among these storage nodes are compared, and the optimal node is chosen to fulfill media data reading.