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20050114: LDM on 64-bit Linux
- Subject: 20050114: LDM on 64-bit Linux
- Date: Tue, 18 Jan 2005 10:51:28 -0700
Arthur,
> To: address@hidden
> From: "Arthur A. Person" <address@hidden>
> Subject: LDM on 64-bit Linux
> Organization: UCAR/Unidata
> Keywords: 200501131927.j0DJRtv2019574
The above message contained the following:
> I'm exploring the possibility of setting up a 64-bit Linux hardware
> platform here on which to run the LDM and I have a few questions:
>
> 1) Does the LDM build out-of-the-box on 64-bit hardware/64-bit Linux
> (I guess that would be the 2.6 kernel) systems?
Yes. See
http://my.unidata.ucar.edu/content/software/ldm/ldm-6.1.0/basics/platform.html#development
for a list of systems on which we have successfully built and installed
the LDM package.
> 2) Will I be able to use large product queues, as a result (e.g. > 8
> GB)... is there any queue size limit?
Yes. On such a system, longs, pointers, and the "off_t" type are all 64
bits by default, which, basically, means that the product-queue can be
any size you want.
> 3) Have you tested any systems running 64-bit OS/LDM and would you
> have any recommendations for hardware?
The "x86_64" system in the above URL contains dual-processor AMD Opterons.
We don't have a 64-bit Intel Itanium system.
> 4) Any problems/bugs that you are aware of? Can such a system be
> used operationally? Any other considerations?
We have run the LDM on the previously-mentioned 64-bit Linux system.
We've experienced some problems with it under high load but, otherwise,
it's worked OK.
Tom might have more to say.
>
> Thanks.
>
> Art.
>
> Arthur A. Person
> Research Assistant, System Administrator
> Penn State Department of Meteorology
> email: address@hidden, phone: 814-863-1563
Regards,
Steve Emmerson
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