Technology to reduce network switches in cluster supercomputers by 40 percent
Fujitsu Laboratories today announced that it has developed a technology that reduces the number of network switches used in a cluster supercomputer system comprised of several thousand units by 40% while maintaining the same level of network performance. Existing cluster supercomputers typically use a "fat tree" network topology, in which, for example, 6,000 servers would require about 800 switches, or possibly more than 2,000 switches, with network performance that needs redundancy and other features. Networks account for up to about 20% of the power consumed by a supercomputer system, which means there are high expectations for a new network technology that can maintain good network performance with fewer switches. Fujitsu Laboratories has used a multi-layer full mesh topology in combination with a newly developed communications algorithm that controls transmission sequences to avoid data collisions. This means that, even in all-to-all communications, which are prone to bottlenecks during application execution,...
