Data transmission method for content-based data center network

Abstract

The invention belongs to a content data network technology, and discloses a data transmission method of a content-centric datacenter network. The method is characterized in that an NDN (Named Data Network) based content-centric routing and forwarding strategy is used; multicast characteristics and expandability of the CCDN (content-centric datacenter network) are guaranteed only by storing a complete PIT (Pending Interest Table) and part of an FIB (forwarding information base), by adopting a Hybrid Content and Location routing strategy and by taking limited storage resources and datacenter network topology of a datacenter switch into consideration; and different from an on-path caching strategy of the NDN, an off-path mechanism that a host provides data caching is adopted by taking large data volume characteristic of the datacenter network and host storage capacity of redundancy into consideration. According to multistage topological characteristics, of the datacenter network, such as Fat-Tree, the CCDN guarantees Distance-aware Content based Forwarding through FIB learning, average path length of data transmission is decreased, and network throughput is improved. By the aid of the adaptive forwarding strategy, the CCDN can still provide accurate and efficient data forwarding in network failure.

Description

technical field [0001] Data center network. Background technique [0002] Data centers are an important part of cloud computing services, and today's network bandwidth has become the main bottleneck affecting data center performance. Most of the existing solutions focus on increasing the number of links and link bandwidth. For example, switch-centric new topology: Fat-Tree (fat tree), VL2 (virtual link layer); host-centric topology: BCube (a high-performance data center topology), DCell (a A recursively defined data center topology); and an optical link strategy: c-Through (a hybrid packet-switched and circuit-switched topology). However, these solutions also bring huge hardware overhead and energy consumption overhead. [0003] The caching mechanism can effectively improve the available bandwidth capability without occupying any network resources. However, the existing IP-based routing strategy cannot be effectively applied to the content-based caching mechanism. NDN (...

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Problems solved by technology

However, the existing IP-based routing strategy cannot be effectively applied to the content-based caching mechanism

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