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Paper Details

  title = "{I}mproving {TCP}/{IP} {M}ulticasting with {M}essage {S}egmentation",
  author= "Happe, Hans Henrik and Vinter, Brian",
  editor= "Broenink, Jan F. and Roebbers, Herman and Sunter, Johan P. E. and Welch, Peter H. and Wood, David C.",
  pages = "155--163",
  booktitle= "{C}ommunicating {P}rocess {A}rchitectures 2005",
  isbn= "978-1-58603-561-7",
  year= "2005",
  month= "sep",
  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\&\#8217;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 \&\#8211;
     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

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