Project Overview:

Longhorn Project Overview Project Program: –NSF XD Vis Purpose: –Provide remote interactive visualization and data analysis services to the national science community Project Duration: –August 1, 2009 – July 31, 2012 Partners and Roles: –Kelly Gaither (TACC, PI) –Valerio Pascucci, Chuck Hansen (University of Utah, co-PI) –David Ebert (Purdue University, co-PI) –John Clyne (NCAR, co-PI) –Hank Childs (UC Davis/LBL, Software) –Linda Akli (SURA, MSI Outreach)

Longhorn Configuration :

Longhorn First NSF XD Visualization Resource 256 Dell Dual Socket, Quad Core Intel Nehalem Nodes –240 with 48 GB shared memory/node (6 GB/core) –16 with 144 GB shared memory/node (18 GB/core) –73 GB Local Disk –2 Nvidia GPUs/Node (FX 5800 – 4GB 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 256 Nodes, 2048 Cores, 512 GPUs, 14.5 TB Memory

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

Longhorn Usage Modalities: Remote/Interactive Visualization –Highest priority jobs –Remote/Interactive capabilities facilitated through VNC –Run on 3 hour queue limit boundary GPGPU jobs –Run on a lower priority than the remote/interactive jobs –Run on a 12 hour queue limit boundary CPU jobs with higher memory requirements –Run on lowest priority when neither remote/interactive nor GPGPU jobs are waiting in the queue –Run on a 12 hour queue limit boundary

Longhorn Queue Structure Example: qsub -q normal -P vis

Software Available on Longhorn Programming APIs: OpenGL, vtk (Not natively parallel) –OpenGL – low level primitives, useful for programming at a relatively low level with respect to graphics –VTK (Visualization Toolkit) – open source software system for 3D computer graphics, image processing, and visualization –IDL Visualization Turnkey Systems –VisIt – free open source parallel visualization and graphical analysis tool –ParaView – free open source general purpose parallel visualization system –VAPOR – free flow visualization package developed out of NCAR –EnSight – commercial turnkey parallel visualization package targeted at CFD visualization –Amira – commercial turnkey visualization package targeted at visualizing scanned medical data (CAT scan, MRI, etc..)

Accessing Longhorn:

Connecting to Longhorn Using VNC longhorn laptop or workstation qsub /share/sge/default/pe_scripts/job.vnc touch ~/vncserver.out tail –f ~/vncserver.out contains vnc port info after job launches longhorn laptop or workstation ssh –L VNC server on vis node ivis[1-7|big] longhorn laptop or workstation vncviewer localhost:: automatic port forwarding to vis node establishes secure tunnel to longhorn vnc port localhost connection forwarded to longhorn via ssh tunnel Without SSH Tunneling: With SSH Tunneling: (1 ) (2 )

Longhorn Visualization Portal portal.longhorn.tacc.utexas.edu Developed to provide easy access to Longhorn and abstract away complexities involved with command line access Developed in conjunction with TeraGrid user portal and employs a fraction of TGUP developers to ensure continuity Used for all in-person Longhorn training

Longhorn Visualization Portal portal.longhorn.tacc.utexas.edu Specify type of session Specify resolution of vnc session Specify number of nodes needed and the wayness of the nodes Provides graphic of machine load

Longhorn Visualization Portal portal.longhorn.tacc.utexas.edu Vnc session opens up in java enabled browser Behaves as if user had gotten a remote desktop into Longhorn.

Longhorn Visualization Portal portal.longhorn.tacc.utexas.edu 3453 Jobs Submitted through Portal All Vis Training on Longhorn Submits through the Longhorn Portal 8/ /2009 2/2010 7/2010 8/ /2010

Longhorn Documentation and Training:

Longhorn User Guides and Training Dates: user-guide

Training Statistics: 1/4/2010 – 12/31/ People Trained In Person 8/ /2009 2/2010 7/2010 8/ /2010

Longhorn Usage Statistics:

Usage on Longhorn: 1/4/2010 – 1/18/ active projects 48,457 jobs run on the system 5,456,155 SUs expended on the system 8/ /2009 2/2010 7/2010 8/ /2010

Usage by Job Type: 1/4/2010 – 1/18/2011 Numbers at Top Indicate Snapshot in Time