用MR生成HFile文件格式后，数据批量导入HBase

环境hadoop cdh5.4.7 hbase1.0.0

测试数据：

topsid  uid roler_num typ
10 111111 255 0

在Hbase 创建t2数据库： create 't2','info'。创建数据库t2， columnFamily：info

import java.io.IOException;
import java.net.URI;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
import org.apache.hadoop.hbase.mapreduce.HFileOutputFormat2;
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.input.TextInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;

public class HFileCreate {

    static class HFileImportMapper2 extends
            Mapper<LongWritable, Text, ImmutableBytesWritable, KeyValue> {
        protected SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
        protected final String CF_KQ = "info";
        protected final int ONE = 1;

        @Override
        protected void map(LongWritable key, Text value, Context context)
                throws IOException, InterruptedException {
            String line = value.toString();
            System.out.println("line : " + line);
            String[] datas = line.split("\\s+");
            // row格式为:yyyyMMdd-sid-uid-role_num-timestamp-typ
            String row =
                     datas[0] + "-" + datas[1] + "-" + datas[2] + "-"
                     + "-" + datas[3];
            ImmutableBytesWritable rowkey = new ImmutableBytesWritable(
                    Bytes.toBytes(row));
            KeyValue kv = new KeyValue(Bytes.toBytes(row),
                    this.CF_KQ.getBytes(), datas[3].getBytes(),
                    Bytes.toBytes(this.ONE));
            context.write(rowkey, kv);
        }
    }

    public static void main(String[] args) {
        Configuration conf = new Configuration();
        conf.addResource("hbase-site.xml");
        String tableName = "t2";
        String input  = "hdfs://node11:9000/datas/t3";
        String output = "hdfs://node11:9000/datas/out12";
        System.out.println("table : " + tableName);
        HTable table;
        try {
            // 运行前，删除已存在的中间输出目录
            try {
                FileSystem fs = FileSystem.get(URI.create(output), conf);
                fs.delete(new Path(output), true);
                fs.close();
            } catch (IOException e1) {
                e1.printStackTrace();
            }

            table = new HTable(conf, tableName.getBytes());
            Job job = new Job(conf);
            job.setJobName("Generate HFile");

            job.setJarByClass(HFileCreate.class);
            job.setInputFormatClass(TextInputFormat.class);
            job.setMapperClass(HFileImportMapper2.class);
            FileInputFormat.setInputPaths(job, input);

            job.getConfiguration().set("mapred.mapoutput.key.class",
                    "org.apache.hadoop.hbase.io.ImmutableBytesWritable");
            job.getConfiguration().set("mapred.mapoutput.value.class",
                    "org.apache.hadoop.hbase.KeyValue");

            FileOutputFormat.setOutputPath(job, new Path(output));

            HFileOutputFormat2.configureIncrementalLoad(job, table);
            try {
                job.waitForCompletion(true);
            } catch (InterruptedException e) {
                e.printStackTrace();
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

}

输出目录要有带columnFamily的文件HFile才生成成功：

4、需要先配置自己HBase_HOME 在配置文件中自己查看。

echo $HBase_HOME

5、我的配置:export HBASE_HOME=/home/hbase-1.0.0-cdh5.4.7

输入：

HADOOP_CLASSPATH=`${HBASE_HOME}/bin/hbase classpath` hadoop jar ${HBASE_HOME}/lib/hbase-server-1.0.0-cdh5.4.7.jar

例如我的：

HADOOP_CLASSPATH=`${HBASE_HOME}/bin/hbase classpath` hadoop jar /home/hbase-1.0.0-cdh5.4.7/lib/hbase-server-1.0.0-cdh5.4.7.jar completebulkload  /datas/out12  t2

一般执行到这步就 成功导入。

6、查询HBase

7、HBase-site.xml

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!--
/**
 *
 * 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.
 */
-->
<configuration>
      <property>
  <name>hbase.rootdir</name>
  <value>hdfs://node11:9000/hbase</value>
</property>
<property>
  <name>hbase.cluster.distributed</name>
  <value>true</value>
</property>
<property>
  <name>hbase.zookeeper.quorum</name>
  <value>node11</value>
</property>
<property>
  <name>dfs.replication</name>
  <value>1</value>
</property>

<property>
  <name>hbase.regionserver.wal.codec</name>
  <value>org.apache.hadoop.hbase.regionserver.wal.IndexedWALEditCodec</value>
</property>

<property>
  <name>hbase.region.server.rpc.scheduler.factory.class</name>
  <value>org.apache.hadoop.hbase.ipc.PhoenixRpcSchedulerFactory</value>
  <description>Factory to create the Phoenix RPC Scheduler that uses separate queues for index and metadata updates</description>
</property>

<property>
  <name>hbase.rpc.controllerfactory.class</name>
  <value>org.apache.hadoop.hbase.ipc.controller.ServerRpcControllerFactory</value>
  <description>Factory to create the Phoenix RPC Scheduler that uses separate queues for index and metadata updates</description>
</property>

<property>
  <name>hbase.coprocessor.regionserver.classes</name>
  <value>org.apache.hadoop.hbase.regionserver.LocalIndexMerger</value>
</property>

<property>
  <name>hbase.master.loadbalancer.class</name>
  <value>org.apache.phoenix.hbase.index.balancer.IndexLoadBalancer</value>
</property>
<property>
  <name>hbase.coprocessor.master.classes</name>
  <value>org.apache.phoenix.hbase.index.master.IndexMasterObserver</value>
</property>                   

</configuration>