The Evolocity 1240s take four Linux servers called compute nodes and arranges them into a fault-tolerant configuration that acts as a single computer so downtime is eliminated.
Data is read and written to each computer in a compute node at the same time.
If one member of the cluster fails, one of the other servers takes over immediately. The Evolocity 1240s package contains the servers, the network adapters for joining the servers into a cluster, and software. Each compute module in the system handles a portion of each of the services. So if an individual module fails, only a small portion of overall capacity is lost, and there is never a threat of a single service being lost. The Evolocity 1240s includes Apache Web server software, messaging software Sendmail and Secure Sockets Layer for conducting secure transactions.