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The Syracuse University Gravitation and Relativity (Sugar) Computing Cluster
 To support our research in data analysis and numerical
relativity, the Syracuse group has constructed a 320 CPU node parallel
computer called the SUGAR cluster.
The specifications of the cluster are:
- Head nodes: 6 Sun X2200-M2 computers, each containing two Dual-Core
AMD Opteron 2.6 GHz processors (four CPU cores per node). These machines were
generously provided by Sun Microsystems
through a Sun
Academic Excellence Grant. Three of these nodes (dataserver, condor and
gravity) run essential cluster support services including the LIGO Data Replicator,
management of Condor (the cluster
batch system), and critical services such as DNS, DHCP and HTTP. Two
nodes (sugar and antares) provide compute nodes with large amounts of RAM for
interactive use and for job submission. The remaining node (metaserver) is used
for development of cluster metadata services.
- Compute nodes: Eighty Dell
PowerEdge 860 servers each with one quad core Intel 2.4 GHz Xeon CPU and 8 Gb
of RAM provide a total of 320 CPU cores and 640 Gb of RAM for the cluster. 78 of these machines are
compute nodes, accessible using Condor and two (sugar-dev1 and sugar-dev2) are accessible via
secure shell login for interactive processing.
- Storage nodes: Cluster storage is provided by four Sun X4500 file servers, each
with 24 Tb of disk storage. These file servers are NFS mounted on the head and
compute nodes and serve user home directories and gravitational wave
detector data.
- Switch: The compute nodes and head nodes are connected via copper
gigabit ethernet (1000baseT) to a HP Procurve 5412zl switch. The storage nodes connect to this switch via 10Gpbs fiber-optic ethernet.
To learn more about the cluster, you can visit the Sugar Wiki Pages. or view the current cluster usage.
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