Re: [R] More than doubling performance with snow

Hi Markus, I'm happy to participate in this, as I think I said previously. I won't have time to look carefully at the draft until sometime next week, but I remain puzzled about the high time listed for case 3 with snow/Rmpi. It would be good to understand what is going on there -- the

Re: [R] More than doubling performance with snow

I see. Thank you very much. On Mon, Nov 24, 2008 at 10:12 AM, Stefan Evert [EMAIL PROTECTED] wrote: I'm sorry but I don't quite understand what not running solve() in this process means. I updated the code and it do show that the result from clusterApply() are identical with the result from

Re: [R] More than doubling performance with snow

-- Forwarded message -- From: Hesen Peng [EMAIL PROTECTED] Date: Mon, Nov 24, 2008 at 9:28 AM Subject: Re: [R] More than doubling performance with snow To: Prof Brian Ripley [EMAIL PROTECTED] I'm sorry but I don't quite understand what not running solve() in this process means. I

Re: [R] More than doubling performance with snow

I'm sorry but I don't quite understand what not running solve() in this process means. I updated the code and it do show that the result from clusterApply() are identical with the result from lapply(). Could you please explain more about this? The point is that a parallel processing framework

Re: [R] More than doubling performance with snow

Hi, there is a new mailing list for R and HPC: [EMAIL PROTECTED] This is probably a better list for this question. Do not forget, first of all you have to register: https://stat.ethz.ch/mailman/listinfo/r-sig-hpc In this case the communication overhead is the problem. The data / matrix is to

[R] More than doubling performance with snow

Hey my R buddies, I installed the snow and rpvm package on my Lenovo Thinkpad T400 today. The experiment below gave me a surprise. The time consumed by serial processing was several times larger than that taken by parallel processing. I'm very curious how this happened. Thank you very much.

Re: [R] More than doubling performance with snow

On Sun, 23 Nov 2008, Hesen Peng wrote: Hey my R buddies, I installed the snow and rpvm package on my Lenovo Thinkpad T400 today. The experiment below gave me a surprise. The time consumed by serial processing was several times larger than that taken by parallel processing. I'm very curious how