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Forum: Hardware Chat Room
Thread: Linux live image w/BOINC? |
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Thread Status: Active Total posts in this thread: 17
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KerSamson
Master Cruncher Switzerland Joined: Jan 29, 2007 Post Count: 1684 Status: Offline Project Badges: 
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For such a configuration, I would at least use an external SSD USB drive instead of a USB key.
----------------------------------------With 256 threads, even if a checkpoint is stored only every 10 min, it will be a lot of disk load. Yves --- PS: In winter, you can connect the server water-cooling to the central heating system  |
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w0rldtravlr
Cruncher Canada Joined: Nov 29, 2005 Post Count: 20 Status: Offline Project Badges:
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Right I was saying instead of a live image + persistence (kind of like Tails), just install Linux directly to the drive as normal. By drive, I'm not talking about HDD or SSD but the USB flash drive. That way there is no need to worry about losing all updates since the live image was created if you install it and update it. I follow you now. This would also allow me to get rid of PXE boot and all its foibles. Insert flash drive, boot, done. With 256 threads, even if a checkpoint is stored only every 10 min, it will be a lot of disk load. Good point. Some NVMe M.2 -> USB may be in order. Looks like they are not expensive, and I have many many 240GB M.2 drives around. Is that server water-cooled in the server or installed in a rack that has water cooled-doors? Should be an interesting setup. Surprisingly they are 100% air cooled. The room I play with these things in is low density space so no cooled doors. They will definitely will make a warm spot in the row of racks. Here are the technical details... Would probably need a minimum of 256GB memory to run WCG. Might be able to squeak by with 128GB if running OPN1 only on all 256 threads not to mention the slots and swap storage required on the USB drive. I believe they are spec'd with 512GB on the SAS SSD array config and 1TB of RAM on the NVMe storage config. I'll be curious to see how it scales up. The delivery ETA is 3rd week of July right now. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I run 6 cores of 8 + O.S + monitoring program and have never used more than 2.7 Gb total. If that helps any... { Running Ubuntu }
----------------------------------------[Edit 1 times, last edit by Former Member at Jun 28, 2020 7:38:31 PM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
According to the documentation the 6525 doesn't support the 7H12 which is why it is air-cooled. Only supports up to the 7742 processor. Still a nice machine though. I had Dell configure one for me but the $15,000 USD for a bare bones system was too rich for me....
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w0rldtravlr
Cruncher Canada Joined: Nov 29, 2005 Post Count: 20 Status: Offline Project Badges:
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According to the documentation the 6525 doesn't support the 7H12 which is why it is air-cooled. Only supports up to the 7742 processor. I just emailed our Dell rep to confirm as that is 20% difference in clock speeds. The Dell configuration tool lets you build a 6525 with the 7H12 not to mention the build spec we gave them, the PO, and the shipping info all refer to the 7H12. Interestingly, if you spec a 7525 with the 7H12 you're forced to select a 240V PSU. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
It is air-cooled with several restrictions(max # of disks,High Performance fans,ambient temperture restrictions,L-type heatsinks, etc). The document you linked to was from 2019 and there is an updated specs book from 2020 on the website. I assume yours is the R6525 and not the C6525. Putting two of those 7H12 processors in a 1U server seems like you would be asking for trouble or the fans would "howl" constantly if it was being used for HPC.
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w0rldtravlr
Cruncher Canada Joined: Nov 29, 2005 Post Count: 20 Status: Offline Project Badges:
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Now that I've had a chance to run these for a few days.... these are not as difficult to accommodate as expected. They draw 10A @ 120V. Heat is not totally unreasonable, and noise is surprisingly moderate in a 18C room.... Though inlet air temps above 22C causes a rapid escalation of fan speed.
Each host with 2x 7H12 is churning out ~2500 OPN1 per day  . |
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