Multi-Datacenter Cassandra on 32 Raspberry Pi’s

At Datastax, interns Daniel Chin and Dolphin built a 32-node DataStax Enterprise cluster running on Raspberry Pi's to demonstrate the fault tolerance of Cassandra. The display features a Big Red Button in their lobby that simulates taking down an entire data center. They designed the hardware using Solidworks, sourced materials from McMaster Carr, and used ethernet cables for network connectivity. Each Raspberry Pi runs at factory settings with vnodes enabled to manage resources efficiently. The cluster is set up as a two-datacenter DSE 4.5 cluster with OpsCenter 5.0 running to show the status of all nodes. Despite its limited hardware capabilities, this unique demonstration aims to excite people about Cassandra's always on capabilities.