HPC/Hardware Details: Difference between revisions
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* gen3 nodes have one Tesla C2075 GPU each - GPU usage it is not charged separately. | * gen3 nodes have one Tesla C2075 GPU each - GPU usage it is not charged separately. | ||
* '''Virtual memory usage''' on nodes may reach up to about 2 × the physical memory size. Your processes running under PBS may allocate that much vmem but cannot practically use it all for reasons of swap space size and bandwidth. If a node acitvely uses swap for more than a few minutes (which drastically slows down compute performance), the job will be killed. | * '''Virtual memory usage''' on nodes may reach up to about 2 × the physical memory size. Your processes running under PBS may allocate that much vmem but cannot practically use it all for reasons of swap space size and bandwidth. If a node acitvely uses swap for more than a few minutes (which drastically slows down compute performance), the job will be killed. | ||
<!-- https://www.osc.edu/documentation/knowledge_base/out_of_memory_oom_or_excessive_memory_usage --> | |||
== Storage == | == Storage == | ||
Revision as of 17:56, May 27, 2014
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User nodes
- Carbon has several major hardware node types, named gen1 through gen3.
- 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 | ||||||||||||||
- Compute time on gen1 nodes is charged at 40% of actual 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.
- gen3 nodes have one Tesla C2075 GPU each - GPU usage it is not charged separately.
- Virtual memory usage on nodes may reach up to about 2 × the physical memory size. Your processes running under PBS may allocate that much vmem but cannot practically use it all for reasons of swap space size and bandwidth. If a node acitvely uses swap for more than a few minutes (which drastically slows down compute performance), the job will be killed.
Storage
- Lustre parallel file system for /home and /sandbox
- ≈100 TB total
- local disk per compute node, 160–250 GB
Interconnect
- Infiniband DDR/QDR (for gen3) – used for parallel communication and storage
- Ethernet 1 GB/s – used for general node access and management
Power
- Power consumption at typical load: ≈125 kW