HPCwire: Back to the Future: SGI Returns to Visualization

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April 11, 2008

Back to the Future: SGI Returns to Visualization

by John E. West, for HPCwire

The Virtu VN is a high density, highly scalable visualization system that can fully incorporate leading edge visualization capabilities into SGI's Full Line of Altix®, Altix® XE, and Altix® ICE High Productivity Clusters.

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In the 1980s and early 1990s, if you were doing anything serious in computer graphics you were doing it with SGI gear. Then a series of strategic missteps and the emergence of incredibly powerful, cheap graphics cards for PCs made the company's graphics lines irrelevant, and for nearly a decade they've survived as a server company. The SGI Virtu line announced this week steers SGI back into graphics for what it says is the long haul. But is there a market left to capture?

I spoke to Tom Reed, SGI's Director of Visualization, about the new offering. Tom's take on the Virtu announcement is that the HPC market is finally ready to once again make serious investments in visualization. "For a long time there has been a lot of focus [in HPC] on getting clusters right. Now we've reach a spot were we're on good footing with clusters and we can start addressing other issues in the high performance ecosystem." He added, "Visualization is the long pole in the performance computing tent now."

SGI has made wobbles in and out of the graphics market since the end of their market dominance around the start of this decade, but those efforts have never born fruit. Soon after Bo Ewald returned to the CEO post at SGI he started making public comments about SGI's return to high end graphics. On September 27 last year he remarked to a packed room at IDC's HPC User Forum, "We will be back in the visual supercomputing business," and then he added this quotable quote, "It was really stupid for the company to stop doing visualization types of things."

This week the company confirmed that Bo wasn't just talking off script at public events. Although the company's press release on Tuesday focused on the Virtu VN200 graphics server, the offering also includes a graphics workstation -- the Virtu VS series -- and the Wide Area Visual Environment, or WAVE, to support the remote visualization needs of many customer sites.

First, the VN200. Built around two quad-core Xeons, the VN200 node is the server side of the SGI visual supercomputing equation. These nodes can run SLES, Red Hat, or Windows (as can the VS), and up to five VN200 nodes can be integrated in a single 4U enclosure. Multiple enclosures can be racked together, and the whole thing can be clustered right into your Altix big iron. Graphics are provided by NVIDIA Quadro FX graphics cards, one to a node.

This integration of compute and visualization gear is a key driver in SGI's Virtu strategy. Again according to Reed, "We are ready to re-attach visualization back to computing... to bring visualization back as an integral part of the computing experience." Despite the goal, this is still version 1.0 of the offering. The Virtu nodes don't have NUMAlink capability, so they don't share memory with each other or with the processors in the Altix side of the system. The VN200 is really a clustered graphics solution, all the way down to the node, and data for any cooperative rendering that's done beyond the cores available in a node has to be managed explicitly using distributed memory semantics. Reed did indicate that they are looking to extend the shared memory model to Virtu nodes in the future.

This will be an important differentiator in a space where SGI is competing for graphics cluster business with companies like GraphStream, Verari, HP, and others, all of whom are essentially constructing solutions out of the same parts. Right now SGI says that a big part of their value add in the VN is that they have created a fully integrated solution, where drivers for the graphics cards and the IB ports don't interfere with each other and everything "just works," and VN200 nodes can be integrated with the HPC nodes generating the data.

While SGI hopes its customers start buying VN nodes with all of their Altix gear, the VN customer doesn't have to integrate it with an Altix setup, or even have an Altix at all. VN nodes work just fine as the standalone centerpiece of an enterprise visualization solution.

Another area where improvements will be critical for product differentiation is in the rendering pipeline itself. According to Reed, SGI is going to add in some of VizServer's collaboration technologies, strengthening the remote and collaborative aspects of the offering.

Though not mentioned in the information released for the launch, if you look at the Virtu offering you'll notice that SGI has added a visual workstation to it's lineup, the Virtu VS line of machines. Reed describes the VS line as important only for a few niche customers in some fairly specialized situations, and not a product they expect to focus on for most customers. According to him, "SGI is really not back in the [general purpose] workstation business. These systems are used almost exclusively as platforms for building visualization solutions for customers who need four or more graphics pipes in a single system (driving 4K projection systems, collaborative team rooms, etc)."

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