9 October 2018

The next generation DAS, DAS-6, will get funding! For details, see the DAS Achievements page. DAS-6 is expected to become operational in the second half of 2020.

2 Jan 2017

DAS-5/VU has been extended with 4 TitanX-Pascal GPUs.

May, 2016

IEEE Computer publishes paper about 20 years of Distributed ASCI Supercomputer. See the DAS Achievements page.

28 Sep 2015

DAS-5/VU has been extended with 16 GTX TitanX GPUs.

DAS-5 Connectivity

An important innovative aspect of the DAS-5 system is the wide-area communications infrastructure between the clusters. Each cluster has 1Gbps of connectivity to the regular Internet through its local University and then on to SURFnet. To satisfy higher demands in bandwidth, transparency and latency, however, we will collaborates with SURFnet to enable DAS-5 to use dedicated lightpaths across SURFnet's DWDM backbone between clusters.

DAS-5 Local Network Architecture

For external connectivity, each cluster has a LAN connection to the local university and a direct WAN connection to SURFnet. The head node and the cluster nodes connect to the LAN with Ethernet interfaces: 1 Gbit/s Ethernet for the cluster nodes and 10 Gbit/s Ethernet for the head node. We are particularly interested in the WAN connectivity to the SURFnet7 network, as it provides lightpaths through the optical infrastructure. The WAN connections will go via a special OpenFlow-capable Ethernet switch.