[R-sig-hpc] snow and foreach memory issue?

Zhang, Ivan ivan.zhang at bankofamerica.com
Fri Dec 11 21:11:11 CET 2009

Thanks for your pointer, 

What my concern is that if I do decide to scale this, when I use method
1 vs. 2,

one of them is significantly worse in terms of memory management, not
sure how I could have written it differently that would have made a


-----Original Message-----
From: Dirk Eddelbuettel [mailto:edd at debian.org] 
Sent: Friday, December 11, 2009 3:05 PM
To: Zhang, Ivan
Cc: r-sig-hpc at r-project.org
Subject: Re: [R-sig-hpc] snow and foreach memory issue?

On 11 December 2009 at 14:35, Zhang, Ivan wrote:
| I have a question regarding ram usage of snow and foreach. 
| I am running windows XP with 4 gb ram and intel quadcore 2.66.

That is not a lot of ram and your main problem. You will be much happier
a 64bit OS (which typically means Linux or OS X, but can be Windows if
want to become a REvo customer) and more ram -- which you need to share
all your cores.

Martin Morgan made this an explicit point in our 'parallel R' survey
available ram is likely to be a binding constraint.  


Three out of two people have difficulties with fractions.

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