[Swift-devel] Torus rank

[Emalayan Vairavanathan]

Great. Thank you Zhao.



________________________________
 From: Zhao Zhang <zhaozhang at uchicago.edu>
To: Emalayan Vairavanathan <svemalayan at yahoo.com> 
Cc: Kazutomo Yoshii <kazutomo at mcs.anl.gov>; "swift-devel at ci.uchicago.edu" <swift-devel at ci.uchicago.edu>; MosaStore <mosastore at googlegroups.com> 
Sent: Tuesday, 6 March 2012 12:41 PM
Subject: Re: [Swift-devel] Torus rank
 
Hi, Emalayan

Emalayan Vairavanathan wrote:
> Hi Kaz,
>
> I found the following about tours rank from
> http://wiki.mcs.anl.gov/zeptoos/index.php/FAQ and want to double check
> with you still this information valid. 
>
>
>       Torus rank:-
>
>
>       A torus rank is a number identifying a compute node within a
>       whole partition. In a way, it is much "nicer" than a pset rank
>       since it is unique within a job and it also starts from 0.
>
> - A shell script can easily calculate it from other fields:
> TORUS_RANK=`echo $BG_PSETORG | awk "{print \\$1 + \\$2 * $BG_XSIZE + \
>             \\$3 * $BG_XSIZE * $BG_YSIZE}"
>
> It would be great if you can make sure that the tours rank is unique
> within a partition and always starts from zero regardless of the
> following.
>
>  - Partition size (fraction of pset / multiple of psets / both )
>  - Platform (Surveyor / Intrepid)
>  - Kernel profiles.
>
yes, this is true regardless of partition size, platform, and ZeptoOS
kernel profiles(zeptoos, zepto-vn-eval, and the one you use for mosa).

best
zhao
>
> (Note: I am asking this in order to figure out a easy way to deploy
> MosaStore at BG/P at large scale. I did few tests with different
> partition size in Surveyor and it seems the tours rank is unique and
> always starts from zero.)
>
> Thank you
> Emalayan
>
>
>  
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