diff --git a/judge/scripts/grader-batch b/judge/scripts/grader-batch
deleted file mode 100755
--- a/judge/scripts/grader-batch
+++ /dev/null
@@ -1,135 +0,0 @@
-#!/usr/bin/ruby
-
-require 'optparse'
-
-def config
-  Grader::Configuration.get_instance
-end
-
-def log_file_name
-  if !File.exists?(config.log_dir)
-    raise "Log directory does not exist: #{config.log_dir}"
-  end
-  config.log_dir + 
-    "/#{GRADER_ENV}.#{Process.pid}"
-end
-
-def log(str)
-  if config.talkative
-    puts str
-  end
-  if config.logging
-    fp = File.open(log_file_name,"a")
-    fp.puts("GRADER: #{Time.new.strftime("%H:%M")} #{str}")
-    fp.close
-  end
-end
-
-def parse_arguments(args)
-  options = {
-    :environment => 'grading',
-    :problems => [],
-    :submissions => []
-  }
-  opts = OptionParser.new do |opts|
-    opts.banner = <<BANNER
-grader-batch - the grader for batch grading..
-Usage: grader-batch [options]
-BANNER
-
-    opts.on("-e", "--env", "Set environment: grading (*), exam, etc.") do |env|
-      options[:environment] = env
-    end
-
-    opts.on("--prob p1,p2,p3", Array, "Grade problems p1, p2, and p3.") do |prob_list|
-      options[:problems] += prob_list
-    end
-    
-    opts.on("--sub s1,s2,s3", Array, "Grade submissions specified by ids") do |submission_list|
-      options[:submissions] += submission_list
-    end
-    
-    # help
-    opts.on_tail("-h", "--help", "Show this message") do
-      puts opts
-      exit
-    end
-  end
-
-  opts.parse!
-  return options
-end
-
-
-#########################################
-# main program
-#########################################
-
-options = parse_arguments(ARGV)
-
-# reading environment and options
-GRADER_ENV = options[:environment]
-puts "environment: #{GRADER_ENV}"
-require File.join(File.dirname(__FILE__),'config/environment')
-
-# reading rails environment
-log 'Reading rails environment'
-
-RAILS_ENV = config.rails_env
-require RAILS_ROOT + '/config/environment'
-
-# register grader process
-if config.report_grader
-  grader_proc = GraderProcess.register(config.grader_hostname,
-                                       Process.pid,
-                                       GRADER_ENV)
-else
-  grader_proc = nil
-end
-
-#set loggin environment
-ENV['GRADER_LOGGING'] = log_file_name
-
-# register exit handler to report inactive, and terminated
-at_exit do
-  if grader_proc!=nil
-    grader_proc.report_inactive 
-    grader_proc.terminate
-  end
-end
-
-# grading
-
-engine = Grader::Engine.new
-runner = Grader::Runner.new(engine, grader_proc)
-
-# grade problems
-options[:problems].each do |prob_name|
-  grader_proc.report_active if grader_proc!=nil
-  prob = Problem.find_by_name(prob_name)
-  if prob==nil
-    puts "cannot find problem: #{prob_name}"
-  else
-    runner.grade_problem(prob)
-  end
-  grader_proc.report_inactive if grader_proc!=nil
-end
-
-# grade submissions
-options[:submissions].each do |sub_id|
-  grader_proc.report_active if grader_proc!=nil
-  puts "Grading #{sub_id}"
-  begin
-    submission = Submission.find(sub_id.to_i)
-  rescue ActiveRecord::RecordNotFound
-    puts "Record not found"
-    submission = nil
-  end
-
-  if submission!=nil
-    runner.grade_submission(submission)
-  end
-  grader_proc.report_inactive if grader_proc!=nil
-end
-
-puts "Done."