From e5c4cd8a5e188592f8786a265c0cd073c69ac886 Mon Sep 17 00:00:00 2001
From: Matei Zaharia <matei@eecs.berkeley.edu>
Date: Tue, 1 Feb 2011 15:11:08 -0800
Subject: Made examples and core subprojects

---
 core/lib/hadoop-0.20.0/bin/slaves.sh | 68 ++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100755 core/lib/hadoop-0.20.0/bin/slaves.sh

(limited to 'core/lib/hadoop-0.20.0/bin/slaves.sh')

diff --git a/core/lib/hadoop-0.20.0/bin/slaves.sh b/core/lib/hadoop-0.20.0/bin/slaves.sh
new file mode 100755
index 0000000000..fc9f720be7
--- /dev/null
+++ b/core/lib/hadoop-0.20.0/bin/slaves.sh
@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+# Run a shell command on all slave hosts.
+#
+# Environment Variables
+#
+#   HADOOP_SLAVES    File naming remote hosts.
+#     Default is ${HADOOP_CONF_DIR}/slaves.
+#   HADOOP_CONF_DIR  Alternate conf dir. Default is ${HADOOP_HOME}/conf.
+#   HADOOP_SLAVE_SLEEP Seconds to sleep between spawning remote commands.
+#   HADOOP_SSH_OPTS Options passed to ssh when running remote commands.
+##
+
+usage="Usage: slaves.sh [--config confdir] command..."
+
+# if no args specified, show usage
+if [ $# -le 0 ]; then
+  echo $usage
+  exit 1
+fi
+
+bin=`dirname "$0"`
+bin=`cd "$bin"; pwd`
+
+. "$bin"/hadoop-config.sh
+
+# If the slaves file is specified in the command line,
+# then it takes precedence over the definition in 
+# hadoop-env.sh. Save it here.
+HOSTLIST=$HADOOP_SLAVES
+
+if [ -f "${HADOOP_CONF_DIR}/hadoop-env.sh" ]; then
+  . "${HADOOP_CONF_DIR}/hadoop-env.sh"
+fi
+
+if [ "$HOSTLIST" = "" ]; then
+  if [ "$HADOOP_SLAVES" = "" ]; then
+    export HOSTLIST="${HADOOP_CONF_DIR}/slaves"
+  else
+    export HOSTLIST="${HADOOP_SLAVES}"
+  fi
+fi
+
+for slave in `cat "$HOSTLIST"|sed  "s/#.*$//;/^$/d"`; do
+ ssh $HADOOP_SSH_OPTS $slave $"${@// /\\ }" \
+   2>&1 | sed "s/^/$slave: /" &
+ if [ "$HADOOP_SLAVE_SLEEP" != "" ]; then
+   sleep $HADOOP_SLAVE_SLEEP
+ fi
+done
+
+wait
-- 
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