R help - Feb 2007 - Start and Restart R over SSH

Hi,
 
I have some big calculations in R to be done. 
Since I can use R on a server with ssh, i was wondering if I can reopen
a R Shell after exiting ssh.

I don't want to use the batch mode and nohup doesn't work.

I want to use something like
ssh user at server
R
---do something in R and start calculation ---
close ssh but let R remain on the server, doing the calculation

ssh user at server
open the existing R Shell / Process

Has anyone done something similiar?
Can you help me or suggest an other solution ? 

Thank you for your help

Nils

On 2/19/07, Nils H?ller <mail at nhoeller.de>
wrote:
> Hi,
>
> I have some big calculations in R to be done.
> Since I can use R on a server with ssh, i was wondering if I can reopen
> a R Shell after exiting ssh.
>
> I don't want to use the batch mode and nohup doesn't work.
>
> I want to use something like
> ssh user at server
> R
> ---do something in R and start calculation ---
> close ssh but let R remain on the server, doing the calculation
>
> ssh user at server
> open the existing R Shell / Process
>
> Has anyone done something similiar?
> Can you help me or suggest an other solution ?
I don't think it is possible to reattach to a process started in one
ssh session from another ssh session.  However, you can put a session
into the background with the -f flag to ssh.  You haven't told us what
operating system you are starting the ssh connection on and what
system will run the R process.  If I had an X server running on the
local system and the remote system provided X clients like xterm I
would do this by

ssh -X -f user at server xterm

This should spring up an autonomous xterm window on the local machine
after which you can run R in it.

I hope this helps.

Hi,
You can take a look at GNU screen programm:
http://www.gnu.org/software/screen/

Andris Jankevics

On Pirmdiena, 19. Febru?ris 2007 15:56, Nils H?ller
wrote:
> Hi,
>
> I have some big calculations in R to be done.
> Since I can use R on a server with ssh, i was wondering if I can reopen
> a R Shell after exiting ssh.
>
> I don't want to use the batch mode and nohup doesn't work.
>
> I want to use something like
> ssh user at server
> R
> ---do something in R and start calculation ---
> close ssh but let R remain on the server, doing the calculation
>
> ssh user at server
> open the existing R Shell / Process
>
> Has anyone done something similiar?
> Can you help me or suggest an other solution ?
>
> Thank you for your help
>
> Nils
>
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> http://www.R-project.org/posting-guide.html and provide commented, minimal,
> self-contained, reproducible code.

Nils H?ller wrote:
> Hi,
>  
> I have some big calculations in R to be done. 
> Since I can use R on a server with ssh, i was wondering if I can reopen
> a R Shell after exiting ssh.
> 
> I don't want to use the batch mode and nohup doesn't work.
> 
> I want to use something like
> ssh user at server
> R
> ---do something in R and start calculation ---
> close ssh but let R remain on the server, doing the calculation
> 
> ssh user at server
> open the existing R Shell / Process
> 
> Has anyone done something similiar?
> Can you help me or suggest an other solution ? 
> 
Use "screen" http://www.gnu.org/software/screen/

1. Login to remote server
2. Run screen
3. Run R, and the long calculation
4. Detach screen (Ctrl-A, Ctrl-D)
5. Logout

Then you may login to server again, re-attach to the running screen and
carry on!

Best wishes,

Mark
-- 
Specialist Registrar and Clinical research fellow
Department of Neurology
Cardiff & Vale NHS Trust and Cardiff University