HPC/Hardware Details

Carbon Cluster User Information

User nodes

1U Twin node chassis (Supermicro).

• Carbon has two major hardware node types, named gen1 and gen2.
• Node characteristics

Node names, types	Node generation	Node extra properties	Node count	Cores per node (max. ppn)	Cores total, by type	Account charge rate	CPU model	CPUs per node	CPU nominal clock (GHz)	Mem. per node (GB)	Mem. per core (GB)	GPU model	GPU per node	VRAM per GPU (GB)	Disk per node (GB)	Year added	Note
Login
login5…6	gen7a	gpus=2	2	16	32	1.0	Xeon Silver 4125	2	2.50	192	12	Tesla V100	2	32	250	2019
Compute
n421…460	gen5		40	16	640	1.0	Xeon E5-2650 v4	2	2.10	128	8				250	2017
n461…476	gen6		16	16	256	1.0	Xeon Silver 4110	2	2.10	96	6				1000	2018
n477…512	gen6		36	16	576	1.0	Xeon Silver 4110	2	2.10	192	12				1000	2018
n513…534	gen7	gpus=2	22	32	704	1.5	Xeon Gold 6226R	2	2.90	192	6	Tesla V100S	2	32	250	2020
n541…580	gen8		20	64	2560	1.0	Xeon Gold 6430	2	2.10	1024	16				420	2024
Total			134		4736								48

• All nodes are dual-socket (4 cores/CPU, 8 cores/node).
• Compute time on gen1 nodes is charged at a 50% discount of walltime. Depending on cores used and memory throughput demanded, these nodes may actually be about on par with gen2 (low memory throughput) or up to about 2–3 times slower.

Infrastructure nodes

• 2 Management nodes
• 2 Lustre MDS
• 4 Lustre OSS
• dual socket, quad core (Intel Xeon E5345, 2.33 GHz)
• pairwise failover

Storage

• Lustre parallel file system
• 42 TB effective (84 TB raw RAID-10)
• 2 NexSAN SATAbeast
• 160–250 GB local disk per compute node
• NFS
  • for user applications and cluster management
  • highly-available server based on DRBD

Interconnect

• Infiniband 4x DDR (Mellanox, onboard ) – MPI and Lustre
• Ethernet 1 GB/s – node access and management
• Ethernet 10 Gb/s – crosslinks and uplink
• FibreChannel – storage backends

Power

• UPS (2) – carries infrastructure nodes and network switches
• PDUs – switched and metered
• Power consumption at typical load: 118 kW