• A resource of the Texas Learning and Computation Center TLC² website
• Location: Philip G. Hoffman Hall

• Cluster currently runs RedHat Enterprise Linux 3 for the ia64 architecture
• View current running jobs: http://sierra.tlc2.uh.edu/gemonitor/
• Hardware:

• Myrinet network: high performance cluster interconnect
• Gigabit Ethernet network: storage traffic, some management, and connectivity outside the cluster with Globus
• Fast Ethernet: strictly NIS, multicast traffic and management and is not available for job runs

• 61 node Itanium2 cluster with a peak capacity of 472 Gflops and 256 GB of total memory
• Cluster interconnect: is Clusteredge from Scali
• Cluster configuration: 56 dual processor nodes with 900 MHz processors, 2 nodes with 1.3 GHz processors, and 2 nodes with 1.5 GHz Itanium2 processors
• Each dual processor node is configured with 4 GB of memory and has a system bus bandwidth of 6.4 GB/sec and a 8.5 MB/sec memory bandwidth
• Nodes have a 36 GB 10,000 rpm SCSI disk and three 64-bit 133 MHz PCI buses
• 900 MHz nodes have a peak capacity of 7.2 Gflops, the 1.3 GHz nodes 10.4 GFlops, and the 1.5 GHz nodes 12 GFlops
• Quad processor node has four 1.5 GHz Itanium2 processors and 16 GB of memory, with a system bus bandwidth of 6.4 GB/sec and a memory bandwidth of 12.8 GB/sec. This node has two 36 GB 10,000 rpm SCSI disks and three 64-bit 133 MHz PCI buses and a peak capacity of 16 Gflops
• Clusteredge interconnect has been demonstrated to achieve a bandwidth of up to 382 MB/sec per node with a latency of about 4 microseconds at the application level (MPI)
• Cluster is currently running CentOS 4.4

• AMD Opteron cluster from Microway consisting of 20 nodes:
• View current running jobs for the Opteron Medusa Cluster: http://medusa.tlc2.uh.edu/ganglia/addons/rocks/queue.php
• 16 dual AMD Opteron(tm) Processor 246 systems, each with 4GB of ram
• 4 quad AMD Opteron(tm) Processor 842 systems, each with 16GB of ram
• Cluster nodes are connected with both an Infiniband and gigabit interconnect
• Cluster runs Rocks 4.1

• 10 node, 20 processor cluster: 70GHz Xeon /400MHz Dual processors Front Side Bus, Dell Precision 530 Minitower, 1 GB, Rambus Memory,nVIDIA GeForce 2 GTS, 32MB DDR, Drive:3.5", 1.44MB, Floppy Drive, 20/48X,IDE,CD-ROM, 20GB Hard Drive, IDE (ATA-100),7.2 RPM, Intel Pro 1000 Gigabit Copper Ethernet card., 12 port 3Com Gigabit Ethernet copper switch. Red Hat Linux 7.2, BSD
• 11 node, 29 processor cluster: Three quad processor Intel Pentium III Xeon 550 MHz nodes, 512 MB main memory, 18 GB 10,000 rpm SCSI hard drive, CD-ROM, Seven PCI connectors: 2x64-bit/66MHz, 2x64-bit/33MHz and 3x32-bit/33MHz, 10/100 fast Ethernet network card. Eight dual processor Intel Pentium III 500 MHz nodes, 256 MB main memory, Diamond Stealth III S540 AGP 32MB Graphics Card, 20.4 GB 7,200 rpm IDE hard drive, 6x DVD, five 32-bit/33 MHz PCI ports, 2 USB ports, Creative Labs Sound blaster Live! audio card, 10/100 fast Ethernet network card. One single processor Intel Pentium III 500 MHz node, 256 MB main memory, Diamond Stealth III S540 AGP 32MB Graphics card, 20.4 GB 7,200 rpm IDE hard drive, 6x DVD, five 32-bit/33 MHz PCI ports, 2 USB ports, Creative Labs Sound blaster Live! audio card, 10/100 fast Ethernet network card. Red Hat Linux 7.1

There are 22.8 Tera Bytes of raw storage available to our clusters, including 7.6 TB of SCSI RAID storage and 15.2 TB of Lustre/NFS storage. In addition, Distributed Storage Network project provides 37.7 TB of raw storage to several research centers at the University of Houston.