Harold Overview
| Manufacturer | SGI |
|---|---|
| Model | Altix ICE 8200 |
| Theoretical Peak | 109.3 TFlops |
| Cores | 10,752 2.8 GHz Intel Nehalem |
| Memory | 32 TB |
| Local System Disk | 600 TB |
| Operating System | SLES 10 SPA |
| Internal Network | 4X DDR Infiniband |
Harold is comprised of five different types of nodes: compute, analysis, storage, login, and management. All nodes contain 2 Intel Xeon Nehalem-EP quad-core processors, 8 MB of Level 2 cache and 24 GB of ECC-protected memory. All nodes have 2.8 GHz processors. The 1344 compute nodes total 10,752 cores and 32 TB of memory with a peak system performance of 120 Teraflops. All compute nodes have a high-speed Infiniband interconnect which offers 4 Gbps bandwidth into and out of each node. The interconnect is non-blocking and supports MPI communications. The storage nodes provide the cluster with an aggregate of 600 TB total disk space, divided among 5 files systems that are globally accessible and offer scalable parallel performance the Lustre file system.
All nodes share a gigabit Ethernet network which provides a high-performance communications conduit between the storage nodes and the compute and login nodes. A 10 gigabit Ethernet connects to the ARL DSRC backbone network, providing a high-performance path to the mass storage archival system. In addition, all nodes have access to the Defense Research and Engineering Network (DREN).
Login nodes
All logins to Harold must be done using the designated login nodes: harold-l[1-8]