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The snow package provides support for simple parallel computing on a network of workstations using R. A master R process calls makeCluster to start a cluster of worker processes; the master process then uses functions such as clusterCall and clusterApply to execute R code on the worker processes and collect and return the results on the master. This framework supports many forms of "embarrassingly parallel" computations. Snow can use one of four communications mechanisms: sockets, PVM, MPI, or NetWorkSpaces (NWS). NWS support was provided by Steve Weston. PVM clusters use the rpvm package; MPI clusters use package Rmpi; NWS clusters use package nws. If pvm is used, then pvm must be started, either using a pvm console (e.g the pvm text console or the graphical xpvm console, both available with pvm) or from R using functions provided by rpvm. Similarly, LAM-MPI must be started, e.g. using lamboot, for MPI clusters that use Rmpi and LAM-MPI. If NWS is used, the NetWorkSpaces server must be running. SOCK clusters are the easiest approach for using snow on a single multi-core computer as they require no additional software. WWW: http://cran.r-project.org/web/packages/snow/ |
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accessibility | ||
arabic | ||
archivers | ||
astro | ||
audio | ||
benchmarks | ||
biology | ||
cad | ||
chinese | ||
comms | ||
converters | ||
databases | ||
deskutils | ||
devel | ||
dns | ||
editors | ||
emulators | ||
finance | ||
french | ||
ftp | ||
games | ||
german | ||
graphics | ||
hebrew | ||
hungarian | ||
irc | ||
japanese | ||
java | ||
korean | ||
lang | ||
math | ||
misc | ||
Mk | ||
multimedia | ||
net | ||
net-im | ||
net-mgmt | ||
net-p2p | ||
news | ||
palm | ||
polish | ||
ports-mgmt | ||
portuguese | ||
russian | ||
science | ||
security | ||
shells | ||
sysutils | ||
Templates | ||
textproc | ||
Tools | ||
ukrainian | ||
vietnamese | ||
www | ||
x11 | ||
x11-clocks | ||
x11-drivers | ||
x11-fm | ||
x11-fonts | ||
x11-servers | ||
x11-themes | ||
x11-toolkits | ||
x11-wm | ||
.cvsignore | ||
CHANGES | ||
COPYRIGHT | ||
GIDs | ||
KNOBS | ||
LEGAL | ||
Makefile | ||
MOVED | ||
README | ||
UIDs | ||
UPDATING |
This is the FreeBSD Ports Collection. For an easy to use WEB-based interface to it, please see: http://www.FreeBSD.org/ports For general information on the Ports Collection, please see the FreeBSD Handbook ports section which is available from: http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/ports.html for the latest official version or: The ports(7) manual page (man ports). These will explain how to use ports and packages. If you would like to search for a port, you can do so easily by saying (in /usr/ports): make search name="<name>" or: make search key="<keyword>" which will generate a list of all ports matching <name> or <keyword>. make search also supports wildcards, such as: make search name="gtk*" For information about contributing to FreeBSD ports, please see the Porter's Handbook, available at: http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/porters-handbook/ NOTE: This tree will GROW significantly in size during normal usage! The distribution tar files can and do accumulate in /usr/ports/distfiles, and the individual ports will also use up lots of space in their work subdirectories unless you remember to "make clean" after you're done building a given port. /usr/ports/distfiles can also be periodically cleaned without ill-effect.