selection new server

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Antonix
Posts: 260
Joined: Fri Oct 16, 2009 8:53 am

selection new server

Post by Antonix » Wed Jun 19, 2013 5:08 pm

what do you think is better selection for WRF run:

4xAMD opteron 63xx 16 core (tot 64 core) 2.6ghz
64 gb ram 1600
hdd sas 300 gb


or

2 x intel E5-2690 2.9 ghz 8 core (tot 16 core)
32 gb ram 1600 mhz
300 gb sas

oib
Posts: 118
Joined: Mon Jan 31, 2011 3:29 pm

Re: selection new server

Post by oib » Mon Jun 24, 2013 12:00 pm

Very interesting question also to me, Antonix.
Hope someone could reply.

What's the reason for SAS HDD? Do this will improve WRF run time?

meteoadriatic
Posts: 1603
Joined: Wed Aug 19, 2009 10:05 am

Re: selection new server

Post by meteoadriatic » Mon Jun 24, 2013 12:05 pm

oib wrote:What's the reason for SAS HDD? Do this will improve WRF run time?
No.

Don't know to answer other questions :)

oib
Posts: 118
Joined: Mon Jan 31, 2011 3:29 pm

Re: selection new server

Post by oib » Mon Jun 24, 2013 12:14 pm

meteoadriatic wrote:
oib wrote:What's the reason for SAS HDD? Do this will improve WRF run time?
No.
Thanks meteoadriatic! I also suspected that ;)

Antonix
Posts: 260
Joined: Fri Oct 16, 2009 8:53 am

Re: selection new server

Post by Antonix » Mon Jun 24, 2013 12:16 pm

I would use the SAS hdd for improved speed and stability.
in WRF does not improve performance but in the post-processing yes
(use of grads very intensive for example extraction of 9000 txt)

meteoadriatic
Posts: 1603
Joined: Wed Aug 19, 2009 10:05 am

Re: selection new server

Post by meteoadriatic » Tue Jun 25, 2013 10:57 am

Antonix wrote:I would use the SAS hdd for improved speed and stability.
in WRF does not improve performance but in the post-processing yes
(use of grads very intensive for example extraction of 9000 txt)
True but you can do postprocessing in ramdisk very easy. I do that all the time, why wear disk heads with lot of movement to read/write small files and slow down creating files... do all job in RAM :)

viewtopic.php?f=5&t=79

oib
Posts: 118
Joined: Mon Jan 31, 2011 3:29 pm

Re: selection new server

Post by oib » Tue Jun 25, 2013 1:13 pm

Hi Antonix,

I have no way to judge the performance of the two servers, but I have a curiosity: what is the price difference of the two servers?

tornado
Posts: 2
Joined: Thu Jul 18, 2013 7:25 pm

Re: selection new server

Post by tornado » Thu Jul 18, 2013 7:35 pm

What I know is that, the bigger the amount of RAM is, the bigger number of grids your domain can have, without suffering. I guess for a small domain, e.g. 100x100 horizontal grids and ~30 vertical levels, 32 or 64 GB of RAM would not make any difference (I didn't test).

I would like to ask about RAID usage of the hard disks for performance on postprocessing purposes: What improvement do you think using RAID5 with 3 SAS disks would make?

oib
Posts: 118
Joined: Mon Jan 31, 2011 3:29 pm

Re: selection new server

Post by oib » Wed Dec 11, 2013 9:57 am

Antonix wrote:what do you think is better selection for WRF run:

4xAMD opteron 63xx 16 core (tot 64 core) 2.6ghz
64 gb ram 1600
hdd sas 300 gb


or

2 x intel E5-2690 2.9 ghz 8 core (tot 16 core)
32 gb ram 1600 mhz
300 gb sas
Hi Antonix,
did you get your new server?
Have you choice 4 x AMD Opteron 63xx or 2 x intel E5-2690 ?
In these days also I'm thinking about that...

oib
Posts: 118
Joined: Mon Jan 31, 2011 3:29 pm

Re: selection new server

Post by oib » Fri Dec 13, 2013 12:33 pm

Please someone can answer this question:

In order to run WRF, buying a server with 4 x AMD Opteron 62xxx/63xx rather than 2 x Intel Xeon E5 could be a waste of money?

The answer should be YES, according to what "golan" says here:
http://forum.wrfforum.com/viewtopic.php ... 443#p19819

It seems like Opteron 62xx/63xx no scaling improvement from 2 to 4 processor :?

Answers will be very appreciated!

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