SGI 2200

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MrBill
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SGI 2200

Unread postby MrBill » Thu Feb 16, 2017 8:10 pm

Picked this up with my onyx2. Not sure what this is. says sgi 2200 on the front.

Still getting it all put back together as seen in the pictures, i am kinda stuck because it did not come with the bottom part that raises it off the floor, the vents are flush with the floor.

I was under the impression this machine and my onyx 2 can be linked together via numa link cables, is that possible?
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Re: SGI 2200

Unread postby Raion-Fox » Thu Feb 16, 2017 8:45 pm

I do not believe Onyx2 desksides can be craylinked. I could be wrong though.

Sexy machine though. I want one soo bad. But all of the ones nearby are inordinately costly.
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vishnu
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Re: SGI 2200

Unread postby vishnu » Thu Feb 16, 2017 10:06 pm

Au contraire, the Origin 2200 and the Onyx2 can both be NUMAlinked. :D In a non-standard configuration, SGI eventually NUMAlinked the Origin 2800 to 512 CPUs, though only three such systems were ever made....
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Re: SGI 2200

Unread postby jan-jaap » Thu Feb 16, 2017 11:44 pm

vishnu wrote:Au contraire, the Origin 2200 and the Onyx2 can both be NUMAlinked. :D In a non-standard configuration, SGI eventually NUMAlinked the Origin 2800 to 512 CPUs, though only three such systems were ever made....

This is not true, at least not for the Onyx2 deskside.

You can NUMAlink any (well a large ... ;) ) number of Origin 2K desksides because that's essentially what O2K racks are. For this you use the two available NUMAlink connectors on the front of the O2K deskside.

But the Onyx2 deskside has only one such connector because the second is taken internally by the IR graphics. Onyx2 racks attach a graphics module with a K-town / X-town pair of cards to an Origin 2K compute module and this module has two available NUMAlink connectors to connect to the rest of the system.

With only one NUMAlink connector you cannot build a valid hypercube topology, so it doesn't work. There's lengthy thread from several (at least 5 or 10) years back where people tried just about everything to figure this out but nobody made it work.
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Re: SGI 2200

Unread postby SAQ » Fri Feb 17, 2017 7:29 am

Just a clarification: On an Onyx2 deskside two of the nodeboard slots are taken up by graphics. SGI still needed a bit more space for the graphics to fit. Because there are only two nodeboards they were able to get away with a null router installed in a single router slot, and the second router slot space is used for the graphics interface board. The nodeboards connect to the router ports, the graphics connect to the XIO, and there isn't any way to use the router ports on a full Origin2000 series to connect graphics.
You do have a XTOWN board in the 2200, so if you found a graphics module you could connect it to your 2200 and have graphics plus 4 CPUs. You also have some open XIO slots that need to be blocked so you don't overheat the system.
Probably a parts system - it will work, but for best performance you need a jumper between two of the front router ports to allow for two communication channels between the routers (one channel is internal on the midplane). You can use a CRAYlink cable or find a IR1 bridge board which looks a little nicer.
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Re: SGI 2200

Unread postby MrBill » Fri Feb 17, 2017 7:48 pm

Alright, i am sufficiently confused. Not going to pretend i understand it all, but from what i understand, they can not be linked together due to there not being enough ports on the onyx2.

What if i want to use the machine in a standalone config? If I do as SAQ suggested and connect numa link cables between the front, can i just use the machine as a headless box for batch jobs?

At the very least it can be a parts machine, but i rather it to be put to use and running. Anyone have some of those cray / numalink cables they are willing to part with?
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Re: SGI 2200

Unread postby MrBill » Fri Feb 17, 2017 7:52 pm

I have the PCI cage, i believe that is what goes in the large empty space in the back. I ripped out a fibre channel card too, i can put an air baffle in. It still has 2 more fibre channel cards. seems kind of excessive.
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Re: SGI 2200

Unread postby Raion-Fox » Fri Feb 17, 2017 8:57 pm

It was probably an HBA.

You can use it standalone. I would use it for building software or for hosting networked installs.

Your Deskside Onyx2 does not have the necessary hardware to be craylinked. You CAN numalink multiple O2ks together though.
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Re: SGI 2200

Unread postby SAQ » Sat Feb 18, 2017 8:32 am

I have one that had several optical FC adapters in shoehorns. What I wound up doing was just keeping the adapters in but pulling them out a bit so they correctly direct the airflow but don't take any power.
You can use two of your shoehorns (XIO to PCI adapters) to install GigE cards and have the O2k display on the Onyx. SGI did a very good job of supporting networked graphics.

My point on the CRAYlink was the blanking plates on all positions on the front router boards in his O2k. There should be two of those ports linked to have the full bandwidth even in a single compute module installation. By convention it's the two bottom router ports, but there's no real reason it can't be any of the other ones.

Question for deskside owners - is the null router hardwired onto the midplane of the deskside Onyx2, or is it a slot that could take a full router?
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Re: SGI 2200

Unread postby jan-jaap » Sat Feb 18, 2017 2:18 pm

SAQ wrote:Question for deskside owners - is the null router hardwired onto the midplane of the deskside Onyx2, or is it a slot that could take a full router?

The null router is the size of a full router, and you can put a full router in a deskside Onyx2. I forgot what happens if you do that, either it completely ignores it of it complains about an unsupported config. I think it was covered in the "can I craylink a deskside Onyx2 thread" I referred to earlier.
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Re: SGI 2200

Unread postby vishnu » Sat Feb 18, 2017 10:55 pm

Well you guys are a regular education! :D

Good info, thanks... :mrgreen:
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