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	QsNet - Wikipedia, the free encyclopedia
		QsNet is a high speed interconnect designed by Quadrics used in HPC clusters, particularly Linux Beowulf Clusters.
		Although it can be used with TCP/IP; like SCI, Myrinet and Infiniband it is usually used with a communication API such as MPI or SHMEM called from a parallel program.
		As of 2003, there are two generations of QsNet.
	en.wikipedia.org /wiki/QsNet (245 words)

	QsNet II - Wikipedia, the free encyclopedia
		Quadrics QsNetII interconnect like its predecessor QsNet uses a 'fat tree' topology, QsNetII scales up to 4096 nodes, each node might have multiple CPUs so that systems of >10,000 CPUs to be constructed.
		Multiple, parallel QsNet networks can be employed in a system to maintain the compute to communications ratio where high CPU count SMP nodes are employed.
		The fat tree topology is resilient with large amounts of redundancy in the higher levels of the switch.
	en.wikipedia.org /wiki/QsNet_II (315 words)

	GRIDtoday: Quadrics Delivers Interconnects For Grid Clusters
		The Itanium 2 processor is the second in the Itanium processor family, a line of enterprise-class processors from Intel that brings the performance and volume economics of Intel Architecture to the most data-intensive business- critical and technical computing applications.
		QsNet enables large clusters of these processing units to be connected together.
		QsNet product families are based on internally developed ASICs, firmware and software technologies, and offer customers high performance, scalability and flexibility.
	www.gridtoday.com /02/1021/100587.html (513 words)

	QsNet
		QsNet is the main (and only) product of Quadrics, a company that initially started in the 1990s as the British firm Meiko that made parallel systems called the Computer Surface 1 and 2.
		QsNet proved to be a very fast and reliable network and since about two years QsNet is also offered for cluster systems.
		The structure, protocols, etc., are very similar to those of the former QsNet but much faster: where in [30] a speed of 300 MB/s for an MPI Ping-Pong experiment was measured while QsNet II has a link speed of 1.3 GB/s.
	www.top500.org /ORSC/2004/qsnet.html (553 words)

	QsNet (Site not responding. Last check: 2007-10-18)
		QsNet, from Quadrics Supercomputers World Ltd. (based at the former Meiko premises in Bristol) is a high bandwidth, ultra low latency network interconnect.
		QsNet is constructed from two QSW-designed sub-systems: a network interface comprising one or more network adapters in each node and a high performance multi-rail data network that connects the nodes together.
		QsNet combines high network performance with the flexibility to support a wide range of parallel programming models.
	tyne.dl.ac.uk /ReDRESS/Beowulf/beowulf_doc/node18.html (228 words)

	Quadrics . Support . Linux Open Source
		The source code for the QsNet kernel modules is released under the GNU General Public License.
		The kernel device drivers and modules to support the QsNet hardware are provided as pre-built binary kernel RPMs for the currently supported RedHat Linux kernels for the ia32 architecture.
		The QsNet source code supplied here, other than code which is directly derived from GNU products, is licenced under the Quadrics QsNet Licence.
	web1.quadrics.com /website/newpages/03LinuxOpensource.html (1563 words)

	Add new comment \| Linux Journal
		QsNet enables large clusters to be connected together with extremely high bandwidth and ultra-low latency.
		Quadrics' solution combines the performance of QsNet with a software environment that enables clusters spanning thousands of processors to be used, administered and run effectively.
		QsNet software is currently used in many of the world's fastest computers.
	www.linuxjournal.com /comment/reply/7933 (401 words)

	Parallel Programming Libraries and Tools
		QsNet MPI is a version of the Argonne National Laboratory's MPI implementation, MPICH, with functionality added to enable it to run natively over the Quadrics QsNet, a very high-bandwidth, ultra low-latency network interconnect.
		To compile against the QsNet MPI you should use one of the compilation wrappers included with it.
		To run code that was compiled against the QsNet MPI you need to use the command /usr/global/bin/qmpirun in your PBS job submission script.
	gears.aset.psu.edu /hpc/software/parlib/qsnet (509 words)

	GRIDtoday: Quadrics DELIVERS INTERCONNECTS FOR GRID CLUSTERS
		Using Quadrics' QsNet high bandwidth, low latency interconnect, Penn State has built Lion-XL, a nearly 1.0 Teraflop machine, with standard components that offer the computation speeds comparable to specialized, and much more expensive, high-performance computers.
		Quadrics is using these grid clusters to gain further endorsement of its QsNet products (which have, and still are, used in proprietary grid cluster SMP systems) as the leading high-performance network supplier for commodity based grid clusters as well.
		QsNet performance, for the Dell Xeon nodes ranges from 1.8 us latency to over 320 Mbytes/sec bandwidth.
	www.gridtoday.com /03/0210/101059.html (698 words)

	[No title] (Site not responding. Last check: 2007-10-18)
		The Quadrics interconnection network (QsNet) contributes two important innovations to the field of high-performance interconnects: (1) integration of the virtual-address spaces of individual nodes into a single, global, virtual-address space and (2) network fault tolerance via link-level and end-to-end protocols that can detect faults and automatically re-transmit packets.
		QsNet achieves these feats by extending the native operating system in the nodes with a network operating system and specialized hardware support in the network interface.
		As these and other important features of QsNet can be found in the InfiniBand specification, QsNet can be viewed as a precursor to InfiniBand.
	www.cs.huji.ac.il /~etcs/pubs/abstracts/petrini02:qsnet-micro.txt (158 words)

	Linux Networx Quadrics QsNet (Site not responding. Last check: 2007-10-18)
		On the 20th Top500 list of the worlds most powerful supercomputers, 3 of the TOP 5 systems use QsNet as their high speed interconnect, including Linux Networx installed MCR at Lawrence Livermore National Labs.
		QsNet is a high bandwidth, ultra low latency interconnect for high performance scalable systems.
		QsNet hardware is just one part of a complete family of products for building high performance clusters.
	www.linuxnetworx.com /products/quadrics.php (177 words)

	The Quadrics Network (QsNET)
		QsNET is the interconnect that will be used in the 30 TeraOps ASCI Q-machine.
		From the architectural point of view, the Q-machine can be described as a cluster of Shared Memory Multiprocessors (SMP), which is expected to the deliver a peak performance in excess of 30 TeraOps (with approximately 15000 processors).
		Experimental results conducted on 64-node AlphaServer cluster with 256 processors indicate that the time to complete the hardware-based barrier synchronization on the whole network is as low as 6 mus, with very good scalability.
	personales.upv.es /~scoll/projects/quadrics.html (997 words)

	Qsockets
		Instead, it was decided to use the existing QsNet interconnect as the data path into the compute nodes, and use a set of new machines as gateways between GigE and QsNet.
		An additional advantage of using QsNet is that we can take advantage of its remote DMA functionality to reduce memory bus and CPU overhead relative to standard GigE interfaces.
		Each gateway machine is physically connected to one QsNet switch port; this port number indicates which gateway machine is to be used.
	www.psc.edu /publications/tech_reports/qsockets/qsockets.html (2585 words)

	[No title]
		QsNet provides a high-capability solution, offering low-latency, high-bandwidth and scalability for building Linux cluster systems.
		QsNet offers a highly integrated PCI connection for use in servers based on either PCI or PCI-X providing superior performance.
		Future Quadrics products, based on the Quadrics next generation PCI-X ASIC for QsNet II, will continue to address the capability required for high performance computing (HPC).
	amd.com /de-de/Corporate/VirtualPressRoom/0,,51_104_550~62556,00.html (510 words)

	Quadrics Number One in capability cluster computing in the Top500 (Site not responding. Last check: 2007-10-18)
		With the advent of the next generation of QsNet later this year we anticipate further gains in this sector as performance, reliability and scalability become overriding factors in the large cluster configurations", commented John Taylor, Technical Marketing of Quadrics.
		The system was built by LNXI and comprises Intel Xeon nodes, a customised QsNet network and a high performance filesystem.
		It was the first system to deploy the federated QsNet network and comprises 2 rails of Quadrics QsNet.
	www.hoise.com /primeur/03/articles/monthly/AE-PR-07-03-90.html (568 words)

	Supercomputing Online - Homepage for the World’s Supercomputing Professionals
		The number 6 and 7 are based on Alphas again, the Pittsburgh Supercomputing Center (Dual-Rail QsNet) and the French Atomic Authority (Commissariat a l'Energie Atomique, CEA.
		The Pacific Northwest Laboratory (Dual-Rail QsNet) on rank 61 with 256 processors.
		Thus IDC paints the same picture that Quadrics QsNet based clusters are strong in the high-end category.
	www.supercomputingonline.com /article.php?sid=2944 (649 words)

	Quadrics . Support . Linux Software
		Please see the QsNet Linux Open Source page for full details and links to open source tarballs and supported binary rpms.
		Quadrics release of the FLEXlm license manager from Macrovision which is required if you are running RMS with a permanent license.
		Qsnet Linux Open Source page to download the QSNETKERNEL product.
	web1.quadrics.com /website/newpages/03LinuxSoftware.html (1229 words)

	Quadrics Top in Top 500 and IDC Rating (Site not responding. Last check: 2007-10-18)
		Here 5 of the leading 15 systems use Quadrics QsNet, although IDC deleted the second machine of Los Alamos National Lab, as both are identical.
		The fastest clusters, based on Hewlett-Packard Alpha processors, follow directly the NEC Earth Simulator and can be found on rank 2 and 3, the ASCI Q machines at Los Alamos National Laboratory.
		The British Petroleum Houston, rank 42, and the Pacific Northwest Laboratory (Dual-Rail QsNet) on rank 61.
	www.hoise.com /primeur/03/articles/monthly/UH-PR-01-03-1.html (396 words)

	The Quadrics Network (QsNet): High-Performance Clustering Technology (ResearchIndex) (Site not responding. Last check: 2007-10-18)
		Please bear with us while we fix the problem.
		Abstract: The Quadrics interconnection network (QsNet) contributes two novel innovations to the field of highperformance interconnects: (1) integration of the virtualaddress spaces of individual nodes into a single, global, virtual-address space and (2) network fault tolerance via link-level and end-to-end protocols that can detect faults and automatically re-transmit packets.
		QsNet achieves these feats by extending the native operating system in the nodes with a network operating system and specialized...
	citeseer.ist.psu.edu /480642.html (335 words)

	ARMCI - Aggregate Remote Memory Copy Interface
		It employs Elan3 and MPICH QsNet libraries provided by Quadrics.
		It employs Elan4 and MPICH QsNet libraries provided by Quadrics.
		Linux cluster with dual 2.4 GHz Pentium-4 nodes, Infiniband interconnect located at Los Alamos National Laboratory.
	www.emsl.pnl.gov /docs/parsoft/armci/performance.htm (282 words)

	QsNet explained (Site not responding. Last check: 2007-10-18)
		Such systems are usually called Federated Networks As of 2003, there are two generations of QsNet.
		In 2004 Quadrics started releasing small to medium switch stand-alone switch configurations called QsNetII E-Series, these configurations range from the 8 to the 128-way systems.
		* Quadrics website * Quadrics QsNet Page * Quadrics 8-way
	www.wordspider.net /qs/qsnet.html (274 words)

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