生成HFile以及入库到HBase

1. MapReduce 生成 HFile

package insert.tools.hfile;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
import org.apache.hadoop.hbase.mapreduce.KeyValueSortReducer;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;

public class TestHFileToHBase {

public static class TestHFileToHBaseMapper extends Mapper {

@Override
protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
String[] values = value.toString().split("/t", 2);
byte[] row = Bytes.toBytes(values[0]);
ImmutableBytesWritable k = new ImmutableBytesWritable(row);
KeyValue kvProtocol = new KeyValue(row, "PROTOCOLID".getBytes(), "PROTOCOLID".getBytes(), values[1]
.getBytes());
context.write(k, kvProtocol);

// KeyValue kvSrcip = new KeyValue(row, "SRCIP".getBytes(),
// "SRCIP".getBytes(), values[1].getBytes());
// context.write(k, kvSrcip);
// HFileOutputFormat.getRecordWriter
}

}

public static void main(String[] args) throws IOException, InterruptedException, ClassNotFoundException {
Configuration conf = HBaseConfiguration.create();
Job job = new Job(conf, "TestHFileToHBase");
job.setJarByClass(TestHFileToHBase.class);

job.setOutputKeyClass(ImmutableBytesWritable.class);
job.setOutputValueClass(KeyValue.class);

job.setMapperClass(TestHFileToHBaseMapper.class);
job.setReducerClass(KeyValueSortReducer.class);
// job.setOutputFormatClass(org.apache.hadoop.hbase.mapreduce.HFileOutputFormat.class);
job.setOutputFormatClass(HFileOutputFormat.class);
// job.setNumReduceTasks(4);
// job.setPartitionerClass(org.apache.hadoop.hbase.mapreduce.SimpleTotalOrderPartitioner.class);

// HBaseAdmin admin = new HBaseAdmin(conf);
// HTable table = new HTable(conf, "hua");

HFileOutputFormat.configureIncrementalLoad(job, table);

FileInputFormat.addInputPath(job, new Path(args[0]));
FileOutputFormat.setOutputPath(job, new Path(args[1]));

System.exit(job.waitForCompletion(true) ? 0 : 1);
}

}

2. HFile 入库到HBase
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.mapreduce.LoadIncrementalHFiles;
import org.apache.hadoop.hbase.util.Bytes;

public class TestLoadIncrementalHFileToHBase {

// private static final byte[] TABLE = Bytes.toBytes("hua");
// private static final byte[] QUALIFIER = Bytes.toBytes("PROTOCOLID");
// private static final byte[] FAMILY = Bytes.toBytes("PROTOCOLID");

public static void main(String[] args) throws IOException {
Configuration conf = HBaseConfiguration.create();
// byte[] TABLE = Bytes.toBytes("hua");
byte[] TABLE = Bytes.toBytes(args[0]);
HTable table = new HTable(TABLE);
LoadIncrementalHFiles loader = new LoadIncrementalHFiles(conf);
loader.doBulkLoad(new Path(args[1]), table);
// loader.doBulkLoad(new Path("/hua/testHFileResult/"), table);
}

}

 http://blog.csdn.net/dajuezhao/article/details/6365053