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22 lines
1.2 KiB
Plaintext
22 lines
1.2 KiB
Plaintext
The snow package provides support for simple parallel computing on a
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network of workstations using R. A master R process calls makeCluster
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to start a cluster of worker processes; the master process then uses
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functions such as clusterCall and clusterApply to execute R code on
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the worker processes and collect and return the results on the master.
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This framework supports many forms of "embarrassingly parallel"
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computations.
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Snow can use one of four communications mechanisms: sockets, PVM, MPI,
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or NetWorkSpaces (NWS). NWS support was provided by Steve Weston.
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PVM clusters use the rpvm package; MPI clusters use package Rmpi; NWS
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clusters use package nws. If pvm is used, then pvm must be started,
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either using a pvm console (e.g the pvm text console or the graphical
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xpvm console, both available with pvm) or from R using functions
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provided by rpvm. Similarly, LAM-MPI must be started, e.g. using
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lamboot, for MPI clusters that use Rmpi and LAM-MPI. If NWS is used,
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the NetWorkSpaces server must be running. SOCK clusters are the
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easiest approach for using snow on a single multi-core computer as
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they require no additional software.
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WWW: https://cran.r-project.org/web/packages/snow/
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