Conventional networks as ethernet can be
used in clustering but one can think to use the same technology
of LAN ( network cards and protocols) in clusters expectating
high performance but it may be a trap.
LAN protocols were not developed with the high performance
aim. They have too many levels ,filled with algotiritms
for routing, security, QoS, etc, that are not necessary in
critical applications. All this levels, in the way they are implemented
(for all application proposes), can degradete the performance of the
application.
Another problem found is about the network
interfaces. Which ones are better, how much they are better and ,
the most important, the features it has that can help one to
reachthe desired performance.
To assure the best performance and
features we can use myrinet cards. Myrinet
cards possesses a high
tecnology based
on
gigabit ethernet. However,
the standard protocol stack delivered with Myrinet is not always an
adequate alternative, whereas different parallel applications
communicate
in quite a different ways. A family of communication abstractions with
specific members to deal with particular application requirement is far
more adequate.
Keywords: mcp myrinet mpi parallelism tcp/ip high-speed
networks
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