一、hive创建表
    create database lxl1;
    use lxl1;
    create table test_ec (id1 string,id2 string) ROW FORMAT DELIMITED FIELDS TERMINATED BY ‘,’ STORED AS TEXTFILE;
    create table test_ec1 (id1 string,id2 string) ROW FORMAT DELIMITED FIELDS TERMINATED BY ‘,’ STORED AS TEXTFILE;
    二、HIVE数据目录开启EC策略
    hdfs ec -enablePolicy -policy RS-3-2-1024k
    hdfs ec -setPolicy -path /warehouse/tablespace/managed/hive/lxl1.db/test_ec -policy RS-3-2-1024k
    hdfs ec -setPolicy -path /warehouse/tablespace/managed/hive/lxl1.db/test_ec1 -policy RS-3-2-1024k
    三、查看EC策略开启是否成功：
    hdfs ec -getPolicy -path /warehouse/tablespace/managed/hive/lxl1.db/test_ec
    hdfs ec -getPolicy -path /warehouse/tablespace/managed/hive/lxl1.db/test_ec1

    四、开始验证
    1.节点全正常测试
    image.png
    insert into test_ec values (‘a’,’b’);
    insert into test_ec1 select from test_ec;
    image.png
    正常，无报错
    2.停掉一个节点测试：
    image.png
    insert into test_ec1 select     from test_ec;
    image.png
    正常，无报错
    3.停掉两个节点测试：
    image.png
    insert into test_ec1 select from test_ec;
    image.png
    4.查询数据是否可用
    select     from test_ec1;
    image.png
    数据不可用

    5.启动为3个datenode节点测试：
    insert into test_ec1 select * from test_ec;
    刚开始报错
    image.png
    过一会再次测试
    image.png
    测试成功
    查询数据可用
    image.png