The humble Raspberry Pi has been around for some time and its popularity is growing again with the latest release of the Pi and is a great development platform for the Internet of Things both cost wise and its sheer versatility from basic programming and running Minecraft, to hosting a Docker server.
GCHQ have recently announced the clustering of a 66 node Pi cluster called bramble. They have just pipped the University of Southampton who built a 64 node Pi cluster out of the Pi and Lego.
Some other earlier attempts have seen a 32 Node Cluster Beowulf from the Boise State University.
However it would appear that a 120 node Cluster is currently being developed.
With the 32 node cluster costing roughly the same as a PC, this technology has certainly brought high powered computing into the reach of most people today and the applications going forward are huge for development of solutions.
Bruce Baikie said:
http://megarpi.inf.unibz.it/ has the largest that I have found 300 Pi’s at the Free University of Bolzano
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Max Hemingway said:
Related blog post at: https://maxhemingway.com/2015/04/18/faster-smaller-raspberry-pi-cluster/