The image above shows the physical topology of our test cluster. The cluster comprises 12 machines, connected with 4 switches. All links are 10G. Below is detailed information about the hardware configuration of switches and each host on the network.

Switch Configuration

All top-of-rack switches are Arista 7124fx models. The aggregation switch is either an Arista 7124fx or an Arista 7050. The configuration on all switches is idential. All ports are configured as "trunk-mode" accepting VLAN tagged packets on VLAN-ID 2. Unless otherwise noted, Ethernet Flow Control and ECN are dissabled.

Host Hardware Configuration

Host Name IP Architecture Cores Threads Speed (GHz) Memory (GBs) Network Adapter
H1 Freestyle 10.10.0.13 Gainstown 4 8 2.26 12 Melanox X3
H2 Hammerthrow 10.10.0.7 Gainstown 4 8 2.26 12 Intel X520
H3 Backstroke 10.10.0.10 Gainstown 4 8 2.26 12 Chelsio T420-CR
H4 Tigger 10.10.0.11 MagnyCours 48 48 1.9 64 Intel X520
H5 Uriel 10.10.0.12 Valencia 12 12 3.1 32 Chelsio T420-CR
H6 Michael 10.10.0.9 SandyBridge 12 24 1.9 32 Melanox X3
H7 Nikola 07 10.10.0.6 IvyBridge-EP 6 12 3.5 64 Intel X520
H7 Quorum301 10.10.0.6 SandyBridge 16 32 3.1 128 Intel X520
H8 Quorum201 10.10.0.1 SandyBridge 4 8 3.3 128 Intel X520
H9 Quorum208 10.10.0.2 SandyBridge 4 8 3.3 128 Intel X520
H10 Quorum205 10.10.0.3 SandyBridge 4 8 3.3 128 Intel X520
H11 Quorum206 10.10.0.4 SandyBridge 4 8 3.3 128 Intel X520
H12 Quorum207 10.10.0.5 SandyBridge 4 8 3.3 128 Intel X520