Data transmission method of content-centric datacenter network

A technology of data center network and data transmission method, which is applied in the direction of data exchange network, digital transmission system, transmission system, etc., can solve the problem that the content-based cache mechanism cannot be effectively applied, and achieve the reduction of average path length, multi-available bandwidth, The effect of improving the total throughput

Inactive Publication Date: 2013-06-26
TSINGHUA UNIV
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However, the existing IP-based routing strategy cannot be

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  • Data transmission method of content-centric datacenter network
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  • Data transmission method of content-centric datacenter network

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[0064] Considering that the data transmission volume of the data center network is huge, and the storage resources of the switch are limited. Different from the on-path (implemented on the transmission path) mechanism of caching on the switch in the traditional NDN (Named Data Network, content data network), we adopt the off-path (not implemented on the transmission path) mechanism of the host to provide caching . After the host finishes reading the data, it decides whether to cache according to the remaining storage space. If the storage space is not enough, you can still decide whether to replace the "old" cache content according to the cache replacement policy.

[0065] Due to the huge data content in the data center and many content names generated, we let the switch only store the complete PIT (Pending Interest Table, a list of request packets waiting for a reply), and do not need to store the complete FIB (routing and forwarding table). For a switch, Interest (request ...

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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. Such as 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 (Named ...

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Application Information

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IPC IPC(8): H04L12/733H04L12/741H04L12/861
Inventor 李丹祝铭刘莹朱晶吴建平
Owner TSINGHUA UNIV
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