Longhorn Project TACC s XD Visualization Resource
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1 Longhorn Project TACC s XD Visualization Resource DOE Computer Graphics Forum April 14, 2010
2 Longhorn Visualization and Data Analysis In November 2008, NSF accepted proposals for the Extreme Digital Resources for Science and Engineering The Longhorn project was proposed as a next generation response to TeraGrid s growing visualization and data analysis needs
3 Spur - Visualization System 128 cores, 1 TB distributed memory, 32 GPUs spur.tacc.utexas.edu login node, no GPUs don t run apps here! ivisbig.ranger Sun Fire X4600 server 8 AMD Opteron dual-core 3 GHz 256 GB memory 4 NVIDIA FX5600 GPUs ivis[1-7].ranger Sun Fire X4440 server 4 AMD Opteron quad-core 2.3 GHz 128 GB memory 4 NVIDIA FX5600 GPUs
4 Spur / Ranger topology spur vis queue Vis nodes ivis[1-7 big] $HOME login3.ranger login4.ranger normal development <etc> queues HPC nodes ixxx-xxx $WORK $SCRATCH Login Nodes Compute Nodes File System
5 Connecting to Spur laptop or workstation ssh spur qsub /share/sge/default/pe_scripts/job.vnc touch ~/vncserver.out tail f ~/vncserver.out contains vnc port info after job launches ssh L <port>:spur.tacc.utexas.edu:<port> <user>@spur.tacc.utexas.edu laptop or spur workstation establishes secure tunnel to spur vnc port laptop or workstation vncviewer localhost::<port> localhost connection forwarded to spur via ssh tunnel spur automatic port forwarding to vis node VNC server on vis node ivis[1-7 big]
6 Spur Usage
7 XD Vis Requirements Analysis Surveyed members of the science community via personal interviews and surveys Received ~60 individual responses
8 XD Vis Requirements Analysis Requirement % Users Requested User Support and Consulting 96% Large-Scale DAV Tools/Resources 39% Remote/Collaborative DAV Services 27% Computational Steering 10% In-simulation DAV Tools 6% Tools for 3D Measurement and Query 6% Tools for Multiple Length and Time 6% Scales (DAV = Data Analysis/Visualization)
9 Longhorn Configuration (256 Nodes, 2048 Cores, 512 GPUs, 14.5 TG Aggregate Memory) 256 Dell Quad Core Intel Nehalem Nodes 240 Nodes Dual socket, quad core per socket: 8 cores/node 48 GB shared memory/node (6 GB/core) 73 GB Local Disk 2 Nvidia GPUs/node (FX GB RAM) 16 Nodes Dual socket, quad core per socket: 8 cores/node 144 GB shared memory/node (18 GB/core) 73 GB Local Disk 2 Nvidia GPUs/node (FX GB RAM) ~14.5 TB aggregate memory QDR InfiniBand Interconnect Direct Connection to Ranger s Lustre Parallel File System 10G Connection to 210 TB Local Lustre Parallel File System Jobs launched through SGE
10 Longhorn s Lustre File System ($SCRATCH) OSS s on Longhorn are built on Dell Nehalem Servers Connected to MD10000 Storage Vaults 15 Drives Total Configured into 2 Raid5 pairs with a Wandering Spare Peak Throughput Speed of the File System is 5.86 GB/sec Peak Aggregate Speed of the File System is 5.43 GB/sec
11 Longhorn Partners and Roles: TACC (Kelly Gaither PI) Longhorn machine deployment User support Visualization and Data Analysis portal development Software/Tool development NCAR (John Clyne CoPI) User support VAPOR Enhancements University of Utah (Valerio Pascucci CoPI, Chuck Hansen) User support Software Integration of RTRT and topological analysis
12 Longhorn Partners and Roles: Purdue University (David Ebert CoPI) User support Integration of visual analytics software UC Davis (Hank Childs Chief Software Integration Architect) Directly facilitate tools being integrated into the VisIt software suite SURA (Linda Akli MSI Outreach/Broadening Participation)
13 Longhorn Usage Modalities: Remote/Interactive Visualization Highest priority jobs Remote/Interactive capabilities facilitated through VNC Run on 4 hour time limit GPGPU jobs Run on a lower priority than the remote/interactive jobs Run on 12 hour time limit CPU jobs with higher memory requirements Run on lowest priority when neither remote/interactive nor GPGPU jobs are waiting in the queue Run 12 hour time limit
14 Longhorn User Portal
15 Longhorn Queue Structure qsub -q normal -P vis
16 Longhorn Usage
17 Longhorn Usage
18 Longhorn Usage
19 Longhorn Usage Field of Science Since Production Field of Science Last 30 Days Field of Science Last 7 Days
20 Sampling of Current Projects Computational Study of Earth and Planetary Materials Simulation of Quantum Systems Visualization and Analysis of Turbulent Flow A probabilistic Molecular Dynamics Optimized for the GPU Visualization of Nano-Microscopy MURI on Biologically-Inspired Autonomous Sea Vehicles: Towards a Mission Configurable Stealth Underwater Batoid Adaptive Multiscale Simulations
21 Visualizing and Analyzing Large- Scale Turbulent Flow Detect, track, classify, and visualize features in large-scale turbulent flow. Collaborative effort between TACC, VACET and domain scientists. Paper submitted to IEEE Vis Thanks to Cyrus Harrison for developing connected components code in VisIt. Thanks to Hank Childs for developing chord length distribution code and visualization. Thanks to Wes Bethel for facilitating VisIt calculated connected components on a 4K^3 turbulence data in parallel using TACC's Longhorn machine. 2 million components were the collaboration! initially identified and then the map expression was used to select only the components that had total volume greater than 15. Data courtesy of P.K. Yeung & and Diego Donzis
22 Questions? Kelly Gaither
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