<div dir="ltr">Well, it is certainly the case that very little high-end product is sitting around on shelves. As someone who has placed his share of orders with five to seven figure bottom lines, I can attest to the fact that it is perfectly typical to have to wait for your place in the production queue to come up before you ever see your stuff. However, that actually isn't the point of COTS, at least as it is defined in the FAR. Rather, the point is that the product was engineered by the manufacturer on their own initiative, with the intent of selling it to the general public. It doesn't even matter if, for example, the product is Configure-to-Order, assembled out of COTS parts as specified by customer, it is still COTS, because that ordering and configuration process is set up for sales to the general public, on the manufacturer's initiative.<div>
<br></div><div>Something is *not* COTS if the customer tells the manufacturer what to build, and how to build it, to meet a unique need of the customer, and the manufacturer then has no expectation that there would be any market for it beyond that one customer, or possibly even that they will be granted no rights to sell it to the general public. This process is where those mil-spec hammers and toilet seats came from, and why they were so expensive. The process is far from dead, however -- you can be certain that the military is still ordering stuff -- radios for example -- that are built to unique and even classified specifications. It's just that, under a lot of scrutiny, the government eventually came to its senses and figured out that maybe the hammers that Eastwing sells at the corner hardware store will work just fine, or at least that the procedures that require the use of a hammer can adjusted, at minimal cost, such that those will work. Then again, from another perspective it is perhaps the case that this only became possible when the quality control standards used in commercial manufacturing processes finally rose to a level that one actually *could* depend on a COTS product when the life of a soldier or astronaut depended on it.<div>
<br></div><div>But from this perspective, very little computing equipment in use today is anything but COTS. Perhaps some of the giant web services companies are specifying custom computing devices, but I'd guess that the volumes involved there are high enough that distinction becomes meaningless. It is almost as if the Beowulf community taught the industry and the market something that they more or less learned.</div>
<div><br></div><div>Perhaps the bigger remaining distinction, from an HPC perspective, is between devices built around merchant silicon vs custom or captive designs. While there is still a market for devices built around Power and SPARC processors they are certainly not the focus of HPC cluster computing (I note that less than 10% of the current Top 500 use anything but Intel or AMD CPUs; Power/PowerPC accounts for most of those). Network equipment has remained something of a bastion for products built around custom ASICs, but even that is starting to crumble as designs built around the latest merchant chips such as the Broadcom Trident II, together with protocols such as SPB & TRILL, become competitive with big-iron chassis switch configurations.</div>
</div><div><br></div><div>When I think about the "SOHO" designation, though, I am thinking more in terms of the commoditization of trailing-edge technology. Take a meander down to MicroCenter and you'll find that "SOHO" network switches are still being sold in high volumes with 100 Mbps ports; only the premium models have gigabit ports. As a practical matter, a 100 Mbps switch is perfectly suited to the task of connecting the half dozen workstations of an insurance agent's office to a couple of printers and a 25 megabit Comcast Internet link. This is the kind of application that those magazine writers were thinking of when they coined the term, and it is only incidental that some of that equipment will occasionally be useful to on-a-shoestring level HPC.</div>
<div><br></div><div>--Bob</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Nov 18, 2013 at 10:49 PM, Mark Hahn <span dir="ltr"><<a href="mailto:hahn@mcmaster.ca" target="_blank">hahn@mcmaster.ca</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
interesting stuff about GSA lists.<br>
<div class="im"><br>
> A Netgear 16-port gigabit switch that sells for $200 is both SOHO and COTS.<br>
> A Cisco Nexus 7718 18-slot chassis switch is still COTS but in no way,<br>
> shape, manner or form SOHO.<br>
<br>
</div>I like to treat COTS as more than merely "not bespoke",<br>
but really pret a porter, and the Target end of it too ;)<br>
<br>
that is, I suspect that there are not a bunch of $30k cisco switches<br>
on the shelf of the big distributors, and especially not in any<br>
local resellers or retail outlets. the point is really that a COTS<br>
device is produced in large volume, with low margins.<br>
also, to some degree with conforming to public standards<br>
and being available from multiple vendors.<br>
<br>
for me, beowulf is all about doing supercomputer work with COTS hardware.<br>
<br>
regards, mark hahn.<br>
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