Improving TCP/IP Multicasting with Message Segmentation
Authors: Happe, Hans Henrik, Vinter, Brian
Abstract:Multicasting is a very important operation in high performance parallel applications. Making this operation efficient in supercomputers has been a topic of great concern. Much effort has gone into designing special interconnects to support the operation. Today’s huge deployment of NoWs (Network of Workstations) has created a high demand for efficient software-based multicast solutions. These systems are often based on low-cost Ethernet interconnects without direct support for group communication. Basically TCP/IP is the only widely supported method of fast reliable communication, though it is possible to improve Ethernet performance at many levels – i.e., by-passing the operating system or using physical broadcasting. Low-level improvements are not likely to be accepted in production environments, which leaves TCP/IP as the best overall choice for group communication. In this paper we describe a TCP/IP based multicasting algorithm that uses message segmentation in order to lower the propagation delay. Experiments have shown that TCP is very inefficient when a node has many active connections. With this in mind we have designed the algorithm so that it has a worst-case propagation path length of O(log n) with a minimum of connections per node. We compare our algorithm with the binomial tree algorithm often used in TCP/IP MPI implementations.
Communicating Process Architectures 2005, Jan F. Broenink, Herman Roebbers, Johan P. E. Sunter, Peter H. Welch, David C. Wood, 2005, pp 155 - 163 published by IOS Press, AmsterdamFiles: PDF
This record in other formats:Web page: BibTEX, Refer
Plain text: BibTEX, Refer
If you have any comments on this database, including inaccuracies, requests to remove or add information, or suggestions for improvement, the WoTUG web team are happy to hear of them. We will do our best to resolve problems to everyone's satisfaction.
Copyright for the papers presented in this database normally resides with the authors; please contact them directly for more information. Addresses are normally presented in the full paper.
Pages © WoTUG, or the indicated author. All Rights Reserved.
Comments on these web pages should be addressed to: www at wotug.org