From ripley at stats.ox.ac.uk  Sun Dec  5 07:27:10 2004
From: ripley at stats.ox.ac.uk (Prof Brian Ripley)
Date: Sun Dec  5 07:27:19 2004
Subject: [Rd] Re: [R] Running R from CD?
In-Reply-To: <1102191671.12184.45.camel@DreamGate>
References: <20041122004120.67125.qmail@web50306.mail.yahoo.com> 
	<1101112947.3798.6.camel@biol102145.oulu.fi>
	<Pine.LNX.4.61.0411220922490.24431@gannet.stats>
	<Pine.LNX.4.61.0411251032450.25900@gannet.stats> 
	<Pine.LNX.4.61.0412041945110.14294@gannet.stats>
	<1102191671.12184.45.camel@DreamGate>
Message-ID: <Pine.LNX.4.61.0412050622350.26333@gannet.stats>

On Sat, 4 Dec 2004, M. Edward Borasky wrote:

> On Sat, 2004-12-04 at 19:47 +0000, Prof Brian Ripley wrote:
>> This is now solved in R-devel: it runs in the slowest scenario below with
>> a startup time of about 2.5secs and no appreciable delay when running.
>
> I've never had any performance issues in R (or any other packages,
> really) with Dirk Eddelbuettel's Quantian "live" CDs or DVDs, and they
> run the whole OS -- not just the applications -- from a *compressed*
> CD/DVD. The key on Linux is, I think, to have plenty of RAM for I/O
> buffering in addition to what's required for your R datasets -- my
> smallest machine is a 256 MB 933 MHz PIII. I can't comment on the
> Windows kernel, though -- I do Linux performance engineering for a
> living :).

[The part omitted here said, supported by data, that other people did have 
performance issues. In particular the `slowest scenario' was not running 
from a CD, but a USB drive.  Please do not remove the essential parts of 
other people's threads without indication -- it is discourteous to both 
poster and the reader.]

-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595


[Rd] Re: [R] Running R from CD?
Prof Brian Ripley