A new communications algorithm and multilayer full-mesh topology promise
power savings Fujitsu has developed an approach to cluster
supercomputers that reduces the number of network switches by 40
percent without sacrificing performance.
The approach centers on using a new communications algorithm that
efficiently controls data transmissions as well as deploying a
multilayer full-mesh topology in the arrangement of the network.
Compared to a three-layer «fat-tree» network topology, which employs a
tree-like structure of connections, the multilayer full-mesh topology
eliminates a layer of switches through more efficient mapping.
Meanwhile, scheduling data transfers avoids data collisions along the
same paths when each server is communicating with every other server.
A cluster supercomputer system of 6,000 servers could use hundreds or
thousands of network switches, with the networking accounting for 20
percent of the system's electricity needs.
When applied to a system of several thousand units, the new approach
reduces network switches by 40 percent while maintaining the level of
performance of a conventional system.
«As a result, cost reductions can be achieved across the board, from
number of components used and power consumption to installation space
and maintenance» a Fujitsu spokesman wrote in an email.
The technology could speed the use of powerful supercomputers used for
the analysis of earthquakes and weather data as well as drug
discovery, according to Fujitsu. Cluster supercomputers have been used
to design everything from smartphones to cars.
Fujitsu Laboratories is presenting the technology later this month at
the Summer United Workshops on Parallel in Japan.
The lab plans to produce a practical version of the approach and
continue research into reducing the number of network switches in
cluster supercomputers.
Source: http://www.infoworld.com