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Several options are supported (mainly for \code{makePSOCKcluster}):
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Several options are supported (mainly for \code{makePSOCKcluster}):
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\describe{
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\describe{
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\item{\code{master}}{The host name of the master, as known to the
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\item{\code{master}}{The host name of the master, as known to the
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workers. This may not be the same as it is known to the master,
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workers. This may not be the same as it is known to the master,
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and on private subnets it may be necessary to specify this as a
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and on private subnets it may be necessary to specify this as a
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numeric IP address. For example, Mac OS X is likely to detect a
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numeric IP address. For example, OS X is likely to detect a
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machine as \samp{somename.local}, a name known only to itself.}
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machine as \samp{somename.local}, a name known only to itself.}
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\item{\code{port}}{The port number for the socket connection,
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\item{\code{port}}{The port number for the socket connection,
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default taken from the environment variable \env{R_PARALLEL_PORT},
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default taken from the environment variable \env{R_PARALLEL_PORT},
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then a randomly chosen port in the range \code{11000:11999}.}
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then a randomly chosen port in the range \code{11000:11999}.}
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\item{\code{timeout}}{The timeout in seconds for that port. Default
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\item{\code{timeout}}{The timeout in seconds for that port. Default
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