| #!/bin/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. |
| |
| # A simple wrapper script around hadoop which enables the use of qfs easily. |
| # Using the hadoop command with qfs requires users to specify overrides for |
| # various parameters (e.g. fs.defaultFS) which can become cumbersome to do on |
| # the command line every time. The goal here is to provide a clean user |
| # experience in using hadoop and qfs. |
| |
| export JAVA_LIBRARY_PATH=/usr/lib/qfs |
| |
| QFS_OPTS=" -Dfs.qfs.impl=com.quantcast.qfs.hadoop.QuantcastFileSystem" |
| QFS_OPTS="$QFS_OPTS -Dfs.defaultFS=qfs://<%= scope['qfs::common::metaserver_host'] %>:<%= scope['qfs::common::metaserver_client_port'] %>" |
| QFS_OPTS="$QFS_OPTS -Dfs.qfs.metaServerHost=<%= scope['qfs::common::metaserver_host'] %>" |
| QFS_OPTS="$QFS_OPTS -Dfs.qfs.metaServerPort=<%= scope['qfs::common::metaserver_port'] %>" |
| |
| usage() { |
| echo " |
| usage: $0 <options> |
| $0 is a simple wrapper around the standard hadoop command that allows for an |
| easy interface with qfs. A subset of the standard hadoop commands are |
| supported (where it makes sense). For all other commands, use the hadoop |
| command directly. |
| |
| Commands: |
| fs query the qfs filesystem |
| jar <jar> <main class> submit a job to hadoop that uses qfs |
| Note: the main class is required |
| distcp <srcurl> <desturl> copy file or directories recursively |
| Note: supports copy into qfs from hdfs |
| " |
| exit 1 |
| } |
| |
| if [ $# == 0 ]; then |
| usage |
| fi |
| |
| COMMAND=$1 |
| shift |
| |
| case $COMMAND in |
| # usage flags |
| --help|-h) |
| usage |
| ;; |
| fs|distcp) |
| hadoop $COMMAND $QFS_OPTS "$@" |
| ;; |
| jar) |
| if [ $# -lt 2 ]; then |
| echo "$COMMAND: jar file and main class are required" |
| usage |
| fi |
| |
| JAR_FILE=$1 |
| MAIN_CLASS=$2 |
| shift 2 |
| hadoop $COMMAND $JAR_FILE $MAIN_CLASS $QFS_OPTS "$@" |
| ;; |
| *) |
| echo "$COMMAND: unsupported -- try using the hadoop command directly" |
| usage |
| ;; |
| esac |