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远程提交Map/Reduce任务

日期：2013-10-08点击：784收藏

1. 将开发好MR代码打包成jar。添加到distributed cache中。

Xml代码

bin/hadoop fs -copyFromLocal /root/stat-analysis-mapred-1.0-SNAPSHOT.jar /user/root/lib

bin/hadoop fs -copyFromLocal /root/stat-analysis-mapred-1.0-SNAPSHOT.jar /user/root/lib

2. 在服务器端创建和你客户端一模一样的用户。创建目录 /tmp/hadoop-root/stagging/用户

3. 客户端提交job的代码

Java代码

Configuration conf = HBaseConfiguration.create();
conf.set("hbase.zookeeper.quorum", "node.tracker1");
conf.set("fs.default.name", "hdfs://node.tracker1:9000/hbase");
conf.set("mapred.job.tracker", "node.tracker1:9001");
Job job = new Job(conf, "Hbase_FreqCounter1");
job.setJarByClass(FreqCounter1.class);
Scan scan = new Scan();
String columns = "details"; // comma seperated
scan.addFamily(Bytes.toBytes(columns));
scan.setFilter(new FirstKeyOnlyFilter());
TableMapReduceUtil.initTableMapperJob("access_logs", scan, Mapper1.class, ImmutableBytesWritable.class,
IntWritable.class, job);
TableMapReduceUtil.initTableReducerJob("summary_user", Reducer1.class, job);
/ TableMapReduceUtil.addDependencyJars(job);
DistributedCache.addFileToClassPath(new Path("hdfs://node.tracker1:9000/user/root/lib/stat-analysis-mapred-1.0-SNAPSHOT.jar"),job.getConfiguration());
job.submit();

 Configuration conf = HBaseConfiguration.create(); conf.set("hbase.zookeeper.quorum", "node.tracker1"); conf.set("fs.default.name", "hdfs://node.tracker1:9000/hbase"); conf.set("mapred.job.tracker", "node.tracker1:9001"); Job job = new Job(conf, "Hbase_FreqCounter1"); job.setJarByClass(FreqCounter1.class); Scan scan = new Scan(); String columns = "details"; // comma seperated scan.addFamily(Bytes.toBytes(columns)); scan.setFilter(new FirstKeyOnlyFilter()); TableMapReduceUtil.initTableMapperJob("access_logs", scan, Mapper1.class, ImmutableBytesWritable.class, IntWritable.class, job); TableMapReduceUtil.initTableReducerJob("summary_user", Reducer1.class, job); // TableMapReduceUtil.addDependencyJars(job); DistributedCache.addFileToClassPath(new Path("hdfs://node.tracker1:9000/user/root/lib/stat-analysis-mapred-1.0-SNAPSHOT.jar"),job.getConfiguration()); job.submit();

4.运行java application，登陆node的MR管理页面，可以看到