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Recommended SSD for a compute node Log Out | Topics | Search
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John Keller
Unregistered guest
Posted on Monday, May 28, 2012 - 4:03 am:   

In planning an 8-processor compute node (mainly for Gaussian), what size of SSD would you recommend? How about a 16-proc node?
Normally, I would just slap a 1-TB drive in there, but I doubt 1-TB is fully utilized. SSD's are way more expensive, so I would like to go less than that, say 480-GB?
JR Schmidt
Moderator
Username: Schmidt

Post Number: 254
Registered: 11-2006
Posted on Monday, May 28, 2012 - 1:32 pm:   

We did check on comparison on SSD vs. spinning disk for computational chemistry, and we found NEGLIGIBLE results. I would say avoid an SSD, save the money, and get a big scratch disk. Just make sure it spins at 7k or 10k RPM, not 5.4k. As long as it is 1TB+ you should rarely, if even, have an issues.

The only the an SSD might help you as if you were running many independent (non-parallel) jobs at the same time on the same compute node. But even here, I would do some benchmarking before you stick that much money into an SSD.

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