[R] cluster/snow question

[Markus Schmidberger]

Hi Tolga,

in SNOW you have to start a cluster with the command

 > library(snow)
 > cluster <- makeCluster(#nodes)

The object "cluster" is a list with an object for each node and each 
object again is a list with all informations (rank, comm, tags)
The size of the cluster is the length of the list.

 > #nodes == length(cluster)

E.g. the rank for node one you can get by
 > cluster[[1]]$rank

Best
Markus

tolga.i.uzuner at jpmorgan.com schrieb:
> Dear R Users,
>
> I am attempting to use the snow package for clustering. Is there a way to 
> identfy, in the environment of each node, a rank for that node and also, 
> the total size of the cluster ? 
>
> By way of analogy, I am looking for the functions in snow equivalent to 
> mpi.comm.rank() and mpi.comm.size() from RMPI, in case that makes things 
> clearer.
>
> Thanks in advance,
> Tolga
>
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-- 
Dipl.-Tech. Math. Markus Schmidberger

Ludwig-Maximilians-Universität München
IBE - Institut für medizinische Informationsverarbeitung,
Biometrie und Epidemiologie
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