1.从HBase读取数据
2.将数据写入HBase
3.结合以上两种，用于数据迁移
关联jar包
问题：hadoop环境变量中缺少hbase的jar包
方法一：
全部copy进去
可能会引起jar包之间的冲突
方法二：
将需要的hbase的jar包放入Hadoop的运行环境变量中
export HBASE_HOME=/opt/moduels/hbase-0.98.6-hadoop2
export HADOOP_CLASSPATH=$HADOOP_CLASSPATH:$HBASE_HOME/bin/hbase mapredcp
检验
/opt/moduels/hadoop-2.5.0/bin/yarn jar lib/hbase-server-0.98.6-hadoop2.jar rowcounter ns1:t1
模拟场景
场景构建
表一：
create 'stu_info','info','addinfo','work'
put 'stu_info','20180219_14001','info:name','tom'
put 'stu_info','20180219_14001','info:age','18'
put 'stu_info','20180219_14001','info:sex','male'
put 'stu_info','20180219_14001','addinfo:height','180'
put 'stu_info','20180219_14001','work:job','worker'
put 'stu_info','20180219_14002','info:name','rose'
put 'stu_info','20180219_14002','info:age','22'
put 'stu_info','20180219_14002','info:sex','female'
put 'stu_info','20180219_14002','addinfo:height','175'
put 'stu_info','20180219_14003','info:name','lee'
put 'stu_info','20180219_14003','info:age','22'
put 'stu_info','20180219_14004','info:name','tony'
put 'stu_info','20180219_14004','info:age','18'
put 'stu_info','20180219_14005','info:name','jim'
put 'stu_info','20180219_14005','info:age','19'
put 'stu_info','20180219_14006','info:name','xiaoming'
put 'stu_info','20180219_14006','info:age','20'
put 'stu_info','20180219_14006','addinfo:height','200'
表二：
create 'stu_result','info'
环境变量
修改hadoop下hadoop——env.sh文件
export HADOOP_CLASSPATH=$HADOOP_CLASSPATH:/opt/moduels/hbase-0.98.6-hadoop2/lib/*
