[R] ff for 64-bit windows and 64-bit R

[Jens Oehlschlägel]

Lawrence,

My understanding is that only a minor change is needed in ff's C++ layer in order to remove the 64bit compiler warnings/errors. 
The C++ layer is maintained by Daniel Adler, who can give you an outlook if/when he plans to attack this. 

Until a 64bit version of ff is available, you might consider using the 32bit win version of R and ff on a 64bit win machine: while 32bit R itself has limited memory access, ff can handle larger objects faster because it benefits from *all* RAM via filesystem-caching. 

Jens



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Von: "Hunsicker, Lawrence" <lawrence-hunsicker at uiowa.edu>
Gesendet: May 13, 2010 3:32:25 PM
An: Jens.Oehlschlaegel at truecluster.com
Betreff: ff for 64-bit windows and 64-bit R


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Jens:
I am running R on a 64 bit PC, 64 bit Windows 7, and 64 bit R.  I have to handle rather large data sets, and I need the 64 bit environment to run some of my analyses.  Use of ff has been recommended to me to help with some of the memory problems, but I am told that ff has not yet been ported to a 64-bit Windows environment.  I have access, of course, to the native code, but I am not the world’s best compiler operator.  Do you have any plans to port ff to a 64-bit Windows and R environment?  Is there anything that I can do to encourage this?  I would be happy to make a contribution to the “ff project” if such a thing exists.
Let me know your plans.
[L. G. Hunsicker, M.D.]
Professor, Internal Medicine
U. Iowa College of Medicine
Phone:  (319) 356-4763
Fax:  (319) 356-7488
lawrence-hunsicker at uiowa.edu