[R-sig-hpc] R SOCKet-based cluster

[Fg Nu]

Hi,

[I posted this to SO (http://stackoverflow.com/q/16786136/1414455), but am also posting this here.]

I am trying to establish a SOCKet cluster using the R `snow` package.

I have access to 5 machines with the IP addresses:
xxx.xxx.xx.x1
xxx.xxx.xx.x2
xxx.xxx.xx.x3
xxx.xxx.xx.x4
xxx.xxx.xx.x5

[As in this question][1], I have successfully copied the public key over to those machines so that password-less authentication works. From within R, this works

    library(parallel)
    library(snowfall)
    for (i in seq.int(5)) system(print(paste('ssh ', 'root at xxx.xxx.xx.x', i, ' date',
                                      sep = '')))

However, this hangs.

    sockCluster = makeSOCKcluster(c('root at xxx.xxx.xx.x1', 
                      'root at xxx.xxx.xx.x2',
                      'root at xxx.xxx.xx.x3',
                      'root at xxx.xxx.xx.x4',
                      'root at xxx.xxx.xx.x5'))

 What am I missing?


  [1]: http://superuser.com/q/600658/133750


Thanks,

Fg