In the past, I have noticed that Syzygy tablebase files did not need to be on a fast disk.
With my 3970x, that is no longer the case.
I have been analyzing some positions at long time control, and I noticed my NPS going from 80M NPS down to 13M NPS. So I looked at the performance monitor and saw my 1TB thumb drive was read saturated at 100%. It is a couple years old, and not stupendously fast. I was getting a few million bytes per second read rate. So I moved the Syzygy files onto a super fast gumstick SSD made for PCIE 4.0, and the NPS shot right back up to 80 million and the I/O saturation below 20% for the m.2 gumstick drive.
My theory about this is as follows:
For sparse positions that only need a few tables, they quickly get cached and you get pretty close to memory speed. But for complex positions that may need dozens of TB files or more, a really fast drive is important.
At any rate, it was a revelation to me.
Interesting 6 man Sygyzy effect with high end hardware
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Dann Corbit
- Posts: 12537
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Interesting 6 man Sygyzy effect with high end hardware
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.