Speed improvement through SSD hard drives

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j0nes2k
Posts: 56
Joined: Wed Feb 03, 2010 5:06 pm

Speed improvement through SSD hard drives

Post by j0nes2k » Mon Dec 06, 2010 4:26 pm

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

meteoadriatic
Posts: 1601
Joined: Wed Aug 19, 2009 10:05 am

Re: Speed improvement through SSD hard drives

Post by meteoadriatic » Mon Dec 06, 2010 5:09 pm

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.

j0nes2k
Posts: 56
Joined: Wed Feb 03, 2010 5:06 pm

Re: Speed improvement through SSD hard drives

Post by j0nes2k » Tue Dec 07, 2010 2:12 pm

Hello,

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

Best regards,
Jonas

meteoadriatic
Posts: 1601
Joined: Wed Aug 19, 2009 10:05 am

Re: Speed improvement through SSD hard drives

Post by meteoadriatic » Tue Dec 07, 2010 5:59 pm

Yes, I'm pretty much sure that will be faster option :)

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