87 lines
3.9 KiB
Python
Executable File
87 lines
3.9 KiB
Python
Executable File
#!/usr/bin/python
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"""
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This is a script to submit rabit job using hadoop streaming
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submit the rabit process as mappers of MapReduce
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"""
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import argparse
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import sys
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import os
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import time
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import subprocess
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import rabit_tracker as tracker
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#!!! Set path to hadoop and hadoop streaming jar here
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hadoop_binary = 'hadoop'
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hadoop_streaming_jar = None
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# code
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hadoop_home = os.getenv('HADOOP_HOME')
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if hadoop_home != None:
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if hadoop_binary == None:
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hadoop_binary = hadoop_home + '/bin/hadoop'
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assert os.path.exists(hadoop_binary), "HADDOP_HOME does not contain the hadoop binary"
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if hadoop_streaming_jar == None:
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hadoop_streaming_jar = hadoop_home + '/lib/hadoop-streaming.jar'
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assert os.path.exists(hadoop_streaming_jar), "HADDOP_HOME does not contain the haddop streaming jar"
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if hadoop_binary == None or hadoop_streaming_jar == None:
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print 'Warning: Cannot auto-detect path to hadoop and streaming jar, need to set them via arguments -hs and -hb'
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print '\tTo enable auto-detection, you can set enviroment variable HADOOP_HOME or modify rabit_hadoop.py line 14'
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parser = argparse.ArgumentParser(description='Rabit script to submit rabit jobs using Hadoop Streaming')
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parser.add_argument('-n', '--nworker', required=True, type=int,
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help = 'number of worker proccess to be launched')
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parser.add_argument('-i', '--input', required=True,
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help = 'input path in HDFS')
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parser.add_argument('-o', '--output', required=True,
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help = 'output path in HDFS')
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parser.add_argument('-v', '--verbose', default=0, choices=[0, 1], type=int,
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help = 'print more messages into the console')
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parser.add_argument('-ac', '--auto_file_cache', default=1, choices=[0, 1], type=int,
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help = 'whether automatically cache the files in the command to hadoop localfile, this is on by default')
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parser.add_argument('-f', '--files', nargs = '*',
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help = 'the cached file list in mapreduce,'\
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' the submission script will automatically cache all the files which appears in command.'\
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' You may need this option to cache additional files.'\
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' You can also use it to manually cache files when auto_file_cache is off')
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parser.add_argument('--jobname', help = 'customize jobname in tracker')
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if hadoop_binary == None:
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parser.add_argument('-hb', '--hadoop_binary', required = True,
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help="path-to-hadoop binary folder")
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else:
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parser.add_argument('-hb', '--hadoop_binary', default = hadoop_binary,
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help="path-to-hadoop binary folder")
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if hadoop_streaming_jar == None:
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parser.add_argument('-jar', '--hadoop_streaming_jar', required = True,
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help='path-to hadoop streamimg jar file')
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else:
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parser.add_argument('-jar', '--hadoop_streaming_jar', default = hadoop_streaming_jar,
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help='path-to hadoop streamimg jar file')
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parser.add_argument('command', nargs='+',
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help = 'command for rabit program')
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args = parser.parse_args()
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if args.jobname is None:
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args.jobname = ('Rabit(nworker=%d):' % args.nworker) + args.command[0].split('/')[-1];
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def hadoop_streaming(nworker, worker_args):
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cmd = '%s jar %s -D mapred.map.tasks=%d' % (args.hadoop_binary, args.hadoop_streaming_jar, nworker)
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cmd += ' -D mapred.job.name=%d' % (a)
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cmd += ' -input %s -output %s' % (args.input, args.output)
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cmd += ' -mapper \"%s\" -reducer \"/bin/cat\" ' % (' '.join(args.command + worker_args))
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fset = set()
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if args.auto_file_cache:
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for f in args.command:
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if os.path.exists(f):
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fset.add(f)
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for flst in args.files:
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for f in flst.split('#'):
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fset.add(f)
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for f in fset:
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cmd += ' -file %s' % f
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print cmd
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subprocess.check_call(cmd, shell = True)
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tracker.submit(args.nworker, [], fun_submit = hadoop_streaming, verbose = args.verbose)
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