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ALMI: An Application Level Multicast Infrastructure (2001)
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| Citations: | 335 - 11 self |
BibTeX
@MISC{Pendarakis01almi:an,
author = {Dimitrios Pendarakis and Dinesh Verma and Sherlia Shi and Marcel Waldvogel},
title = {ALMI: An Application Level Multicast Infrastructure},
year = {2001}
}
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Abstract
The IP multicast model allows scalable and efficient multi-party communication, particularly for groups of large size. However, deployment of IP multicast requires substantial infrastructure modifications and is hampered by a host of unresolved open problems. To circumvent this situation, we have designed and implemented ALMI, an application level group communication middleware, which allows accelerated application deployment and simplified network configuration, without the need of network infrastructure support. ALMI is tailored toward support of multicast groups of relatively small size (several I Os of members) with many to many semantics. Session participants are connected via a vir- tual multicast tree, which consists of unicast connections between end hosts and is formed as a minimum spanning tree (MST) using application-specific performance metric. Using simulation, we show that the performance penalties, introduced by this shift of multicast to end systems, is a relatively small increase in traffic load and that ALMI multicast trees approach the efficiency of IP multicast trees. We have also implemented ALMi as a Java based middleware package and performed experiments over the Internet. Experimental results show that ALMI is able to cope with network dynamics and keep the mul- ticast tree efficient.
Keyphrases
application level multicast infrastructure small increase unicast connection application deployment traffic load mul ticast tree efficient almi multicast tree efficient multi-party communication vir tual multicast tree minimum spanning tree session participant performance penalty ip multicast model network infrastructure support network configuration application level group communication middleware application-specific performance end host substantial infrastructure modification ip multicast tree ip multicast network dynamic unresolved open problem multicast group middleware package large size experimental result many semantics small size
