
CCGrid '11
129
InfiniBand Over SONET: Obsidian Longbows RDMA
throughput measurements over USN
Linux
host
ORNL
700 miles
Linux
host
Chicago
CDCI
Seattle
CDCI
Sunnyvale
CDCI
ORNL
CDCI
longbow
IB/S
longbow
IB/S
3300 miles 4300 miles
ORNL loop -0.2 mile: 7.48Gbps
IB 4x: 8Gbps (full speed)
Host-to-host local switch:7.5Gbps
IB 4x
ORNL-Chicago loop – 1400 miles: 7.47Gbps
ORNL- Chicago - Seattle loop – 6600 miles: 7.37Gbps
ORNL – Chicago – Seattle - Sunnyvale loop – 8600 miles: 7.34Gbps
OC192
Quad-core
Dual socket
Hosts:
Dual-socket Quad-core 2 GHz AMD
Opteron, 4GB memory, 8-lane PCI-
Express slot, Dual-port Voltaire 4x
SDR HCA
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