R help - Apr 2012 - Parallel writes in R

R-helpers:

I'm curious what support R has for parallel writes to a binary file?
If I want to use snow to have each node write different "rows" of a
flat binary file (possibly out of sequence), are there any
tricks/issues I should be aware of?

--j

-- 
Jonathan A. Greenberg, PhD
Assistant Professor
Department of Geography
University of Illinois at Urbana-Champaign
607 South Mathews Avenue, MC 150
Urbana, IL 61801
Phone: 415-763-5476
AIM: jgrn307, MSN: jgrn307 at hotmail.com, Gchat: jgrn307, Skype: jgrn3007
http://www.geog.illinois.edu/people/JonathanGreenberg.html

On 02.04.2012 21:35, Jonathan Greenberg wrote:
> R-helpers:
>
> I'm curious what support R has for parallel writes to a binary file?
> If I want to use snow to have each node write different "rows" of
a
> flat binary file (possibly out of sequence), are there any
> tricks/issues I should be aware of?
This is a very hard task, since you have to synchonice the nodes. 
Typically it is more advisable to collect the rows by the master and 
write the whole file from there.

Uwe Ligges

>
> --j
>