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@@ -55,7 +55,7 @@
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   opts.on("-s", "--servers NUM", "Number of servers to start",
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                                  "set a value >1 to start a cluster")             { |num| options[:servers] = num.to_i }
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-  opts.on("-o", "--only", "Send command to only one server of the cluster")       { |only| options[:only] = only }
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+  opts.on("-o", "--only NUM", "Send command to only one server of the cluster")   { |only| options[:only] = only }
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   opts.on("-C", "--config PATH", "Load options from a config file")               { |file| options[:config] = file }
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   opts.separator ""

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@@ -1,8 +1,8 @@
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 module Thin
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   # Control a set of servers.
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   # * Generate start and stop commands and run them.
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-  # * Inject the port number in the pid and log filenames.
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-  # Servers are started throught the +thin+ commandline script.
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+  # * Inject the port or socket number in the pid and log filenames.
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+  # Servers are started throught the +thin+ command-line script.
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   class Cluster
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     include Logging
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