The Maryland Advanced Research Computing Center (or MARCC for short) is a shared computing facility located on the Bayview Campus of Johns Hopkins University and funded by a State of Maryland grant. MARCC is jointly managed by Johns Hopkins University and the University of Maryland College Park.
Bluecrab is the main cluster at MARCC with over 19,000 CPU cores and a combined theoretical performance of over 900 TFLOPs. The compute nodes are a combination of Intel Haswell and Ivy Bridge processors and Nvidia K80 GPUs (supporting CUDA compute capability 3.7) connected via FDR-14 Infiniband interconnects. It also features two types of storage: 2 PB Lustre (Terascala) and 15 PB ZFS/Linux.
About 15% of the resources for MARCC/Bluecrab have been reserved for use by the University of Maryland, and the University HPCC Allocations and Advisory Committee (AAC) will allocate these resources among proposals submitted to the committee. The UMD portion of the HPCC is about 6000 kSU per quarter.
More information about MARCC and the Bluecrab HPC cluster can be found at the MARCC web site. The following hardware information is provided for your convenience:
| Description | Processor | Number of nodes |
Cores/node | Total cores | Memory/node GB |
Memory/coreGB | GPUs/node | Interconnect |
|---|---|---|---|---|---|---|---|---|
| std compute node | dual Haswell, 2.5 GHz | 676 | 24 | 16,224 | 128 | 5.3 | 0 | FDR infiniband |
| std compute node (2) | dual Broadwell, 2.6 GHz | 48 | 28 | 1,344 | 128 | 4.6 | 0 | FDR infiniband |
| Dell R920 | quad Ivy Bridge, 3 GHz | 50 | 48 | 2,400 | 1024 | 21.3 | 0 | FDR infiniband |
| Dell R730 | dual Haswell, 2.5 GHz | 48 | 24 | 1,152 | 128 | 5.3 | 2 | FDR infiniband |
| new GPU nodes | dual Broadwell, 2.6 GHz | 24 | 28 | 672 | 128 | 4.6 | 2 | FDR infiniband |
| TOTALS | 846 | 21,792 |
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The MARCC/Bluecrab cluster is maintained
by MARCC staff, not the Division of Information Technology
at the University of Maryland. Therefore, the MARCC website
should always be considered the definitive source of information about MARCC and
the Bluecrab cluster. Any information provided
on this UMD website is provided as a convenience to our users, but we cannot guarantee its
accuracy or currency. In case of discrepency, you should assume the
MARCC website is the correct one.
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