From pgilbert at bank-banque-canada.ca  Thu Feb 14 16:14:05 2008
From: pgilbert at bank-banque-canada.ca (Paul Gilbert)
Date: Thu, 14 Feb 2008 10:14:05 -0500
Subject: [Rd] Vector binding on harddisk
In-Reply-To: <47B426BE.9010606@gmx.net>
References: <47B426BE.9010606@gmx.net>
Message-ID: <47B45ABD.4010304@bank-banque-canada.ca>



_ wrote:
> Hi all,
> Using big vectors (more than 4GB) is unfortunately not possible under 
> Windows or other OS's if not enough RAM exists.

This is NOT true. It is not limited by RAM, but rather by RAM and swap 
space.  With 500G hard disks at about $100, the more serious limitation 
is a 32bit OS.  Speed is a different consideration, but I doubt that 
taking over what the OS is suppose to do will be the real answer.

Paul

> Could it be possible to implement an a new data type in R, like a 
> vector, but instead holding the information in memory, the data lies on 
> an file. If data is accessed, the data type vector get the information 
> automatically from the file.
> There is a package out there (named ff) but the accessed boundary have 
> to be declared by the user this is a disadvantage.
> 
> Greetings.
> 
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
====================================================================================

La version fran?aise suit le texte anglais.

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[Rd] Vector binding on harddisk
Paul Gilbert