[R-sig-hpc] error: object '.doSnowGlobals' not found?

[Stefan Thomas]

Hi Rajendra Kumar,

I think you are trying to start a SOCKS cluster (same machine) in a MPI 
environment (distributed machines).
Have you tried

cl<-makeCluster(type="MPI",4)

after creating and setting the orte-hostfile?

best
stef

Am 08.08.2014 um 07:13 schrieb Rajendra Kumar:
> Dear R HPC Users,
>
> I'm trying to parallelize a code on 4 nodes(type = "SOCK"). Here is my code.
>
>
>      library(itertools)
>      library(foreach)
>      library(doParallel)
>      library(parallel)
>
>      workers <- ip address of 4 nodes
>      cl = makePSOCKcluster(workers, master="ip address of master")
>      registerDoParallel(cl)
>
>      z <- read.csv("ProcessedData.csv", header=TRUE, as.is=TRUE)
>      z <- as.matrix(z)
>
>
>      system.time({
>        chunks <- getDoParWorkers()
>        b <- foreach (these = isplitIndices(nrow(z),
>                                            chunks=chunks),
>                      .combine = c) %dopar% {
>                        a <- rep(0, length(these))
>                        for (i in 1:length(these)) {
>                          a[i] <- mean(z[these[i],])
>                        }
>                        a
>                      }
>      })
>
>
>
>
>
> I get this error..4 nodes produced errors; first error: object
> '.doSnowGlobals' not found. This code runs fine if I'm using doMC i.e using
> the same machine's cores. But when I try to use other computers for
> parallel computing I get the above error. When I change it to
> registerDoSNOW the error persists.
>
> Does snow and DoSNOW work in a cluster? I could create nodes on the
> localhost using snow but not on the cluster. Anyone out there using snow?
>
> Thanks in advance.
>
> With Warm Regards,
> Rajendra Kumar M
> Graduate Student.
>
> School of Medical Science & Technology,
> IIT Kharagpur,
> West Bengal-721302.
>
> 	[[alternative HTML version deleted]]
>
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