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Speed improvement through SSD hard drives

Posted: Mon Dec 06, 2010 4:26 pm
by j0nes2k
Hello,

I am thinking about getting a new server for my WRF model computations, and I am wondering about the hardware specs I should use for that. Obviously the most important thing is CPU power, but I am wondering what to do about harddrives in general. I know that SSD drives can give a significant performance boost for I/O tasks, so I am thinking about using those drives.

Has anyone already tried this and if so, what were your results compared to normal harddrives? If you did not try this, do you think the WRF performance will be affected by this?

Best regards,
Jonas Kaufmann

Re: Speed improvement through SSD hard drives

Posted: Mon Dec 06, 2010 5:09 pm
by meteoadriatic
I think you will get nothing during WRF run, and little speedup during postprocessing (reading from gribs and writing back to drive).

I have three disks in stripping raid configuration and to be honest, it seems to me that run is not affected by disk I/O speed. WRF performance looks to be function of just processor/ram speed.

For posprocessing, I use ramdrive, so nothing is written to the disk actually.

Re: Speed improvement through SSD hard drives

Posted: Tue Dec 07, 2010 2:12 pm
by j0nes2k
Hello,

thank you for your answer! I think I can save the money and buy a more powerful CPU then :)

Best regards,
Jonas

Re: Speed improvement through SSD hard drives

Posted: Tue Dec 07, 2010 5:59 pm
by meteoadriatic
Yes, I'm pretty much sure that will be faster option :)