Computing power to answer NASA's complex science and engineering questions
Pleiades is a distributed-memory SGI/HPE ICE cluster connected with InfiniBand in a dual-plane hypercube technology. Originally deployed in 2008, Pleiades has been expanded many times and is one of the world's most powerful supercomputers.
The system contains the following types of Intel Xeon processors: E5-2680v4 (Broadwell), E5-2680v3 (Haswell), E5-2680v2 (Ivy Bridge), and E5-2670 (Sandy Bridge). Pleiades is named after the astronomical open star cluster of the same name.
Broadwell Nodes | Haswell Nodes | Ivy Bridge Nodes | Sandy Bridge Nodes | |
---|---|---|---|---|
Number of Nodes | 2,016 | 2,052 | 5,256 | 944 |
Processors per Node | 2 fourteen-core processors per node | 2 twelve-core processors per node | 2 ten-core processors per node | 2 eight-core processors per node |
Node Types | Intel Xeon E5-2680v4 processors | Intel Xeon E5-2680v3 processors | Intel Xeon E5-2680v2 processors | Intel Xeon E5-2670 processors |
Processor Speed | 2.4 GHz | 2.5 GHz | 2.8 GHz | 2.6 GHz |
Cache | 35 MB for 14 cores | 30 MB for 12 cores | 25 MB for 10 cores | 20 MB for 8 cores |
Memory Type | DDR4 FB-DIMMs | DDR4 FB-DIMMs | DDR3 FB-DIMMs | DDR3 FB-DIMMs |
Memory Size | 4.6 GB per core, 128 GB per node | 5.3 GB per core, 128 GB per node | 3.2 GB per core, 64 GB per node (plus 3 bigmem nodes with 128 GB per node) | 2 GB per core, 32 GB per node |
Host Channel Adapter | InfiniBand FDR host channel adapter and switches | InfiniBand FDR host channel adapter and switches | InfiniBand FDR host channel adapter and switches | InfiniBand FDR host channel adapter and switches |
Sandy Bridge + GPU Nodes | Skylake + GPU Nodes | Cascade Lake + GPU Nodes | |
---|---|---|---|
Number of Nodes | 64 | 19 | 38 |
Processors per Node | Two 8-core host processors and one GPU coprocessor (2,880 CUDA cores) | Two 18-core host processors; four GPU coprocessors (for 17 nodes); eight GPU coprocessors (for 2 nodes) | Two 24-core host processors and four GPU coprocessors (5,120 CUDA cores) |
Node Types | Intel Xeon E5-2670 (host); NVIDIA Tesla K40 (GPU) | Intel Xeon Gold 6154 (host); NVIDIA Tesla V100-SXM2-32GB (GPU) | Intel Xeon Platinum 8268 (host); NVIDIA Tesla V100-SXM2-32GB (GPU) |
Processor Speed | 2.6 GHz (host); 745 MHz (GPU) | 3.0 GHz (host); 1,290 MHz (GPU) | 2.9 GHz (host); 1,290 MHz (GPU) |
Cache | 20 MB for 8 cores (host) | 27.5 MB shared non-inclusive by 20 cores | 35.75 MB shared non-inclusive by 24 cores |
Memory Type | DDR3 FB-DIMMS (host); GDDR5 (GPU) | DDR4 FB-DIMMS (host); HBM2 (GPU) | DDR4 FB-DIMMS (host); HBM2 (GPU) |
Memory Size | 64 GB per node (host); 12 GB per GPU card | 384 GB per node (host); 32 GB per GPU card | 384 GB per node (host); 32 GB per GPU card |
Host Channel Adapter | InfiniBand FDR host channel adapter and switches (host) | InfiniBand EDR host channel adapter and switches (host) | InfiniBand EDR host channel adapter and switches (host) |
8 Front-End Nodes | PBS server pbpspl1 | PBS server pbspl3 | |
---|---|---|---|
Number of Processors | 2 eight-core processors per node | 2 16-core processors per node | 2 16-core processors per node |
Processor Types | Xeon E5-2670 (Sandy Bridge) processors | AMD EPYC 7320P processors | AMD EPYC 7320P processors |
Processor Speed | 2.6 GHz | 4 GHz | 4 GHz |
Memory | 64 GB per node | 72 GB per node | 16 GB per node |
Connection | 10 Gigabit and 1 Gigabit Ethernet connection | N/A | N/A |
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