论文标题
BERT：可扩展的源云数据中心的路由多播
Bert: Scalable Source Routed Multicast for Cloud Data Centers
论文作者
论文摘要
传统的IP多播路由不适合云数据中心（DC）网络，因为需要支持大量具有较大群体的组。最先进的DC多播路由方法旨在通过例如利用DC拓扑的对称性和DC开关的可编程性来克服可扩展性问题，以紧凑的数据包内包装多播组信息，从而减少了山顶，从而降低了由于需要将流量存储在网络开关的流量。但是，尽管这些范围与多播小组的数量很好，但它们并不与群体大小相关，因此，它们产生了大量的交通控制开销和网络拥塞。在本文中，我们提出了BERT，这是一种可扩展的，源启动的DC多播路由方法，它可以按照多播组的数量和大小很好地缩放，并通过将多播组的成员分为一组集群，并通过聚类将每个集群分为一个集群。与最先进的方法相比，伯特通过大大减少数据包标头大小和额外数据包传输的数量，从而降低了交通控制的开销，这是由于需要在整个开关上压实转发规则。
Traditional IP multicast routing is not suitable for cloud data center (DC) networks due to the need for supporting large numbers of groups with large group sizes. State-of-the-art DC multicast routing approaches aim to overcome the scalability issues by, for instance, taking advantage of the symmetry of DC topologies and the programmability of DC switches to compactly encode multicast group information inside packets, thereby reducing the overhead resulting from the need to store the states of flows at the network switches. However, although these scale well with the number of multicast groups, they do not do so with group sizes, and as a result, they yield substantial traffic control overhead and network congestion. In this paper, we present Bert, a scalable, source-initiated DC multicast routing approach that scales well with both the number and the size of multicast groups, and does so through clustering, by dividing the members of the multicast group into a set of clusters with each cluster employing its own forwarding rules. Compared to the state-of-the-art approach, Bert yields much lesser traffic control overhead by significantly reducing the packet header sizes and the number of extra packet transmissions, resulting from the need for compacting forwarding rules across the switches.
