通过Hive外部表迁移Kudu数据表

通过Hive外部表迁移Kudu数据表

由于数据量越来越大，服务器难以支撑所以迁移到云上，记录下迁移kudu表的过程

1、导出数据为csv文件：

`impala-shell -q "select * from vs_kudu_xxx_days" -B --output_delimiter=","  -o /opt/vs_kudu_xxx_days_0131.csv

2、scp csv文件到云服务器

3、创建hive临时表

CREATE TABLE `vs_hive_xxx_days_temp` (
  `id` string,
  `aaa_count` int,
  `avg_time` bigint,
  `leave_time` string,
  resident_amount int
) ROW FORMAT DELIMITED 
FIELDS TERMINATED BY ',' 
STORED AS TEXTFILE;

4、将csv文件导入hive外部表

load data local inpath '/opt/vs_kudu_xxx_days_0131.csv' into table vs_hive_xxx_days_temp;

3、4两步可以直接通过上传csv到HDFS然后建外部表指定csv位置方式实现，相同效果

5、将csv文件导入hive外部表

load data local inpath '/opt/vs_kudu_xxx_days_0131.csv' into table vs_hive_xxx_days_temp;

6、创建新的kudu表

CREATE TABLE `vs_kudu_xxx_days` (
  id string,
  `aaa_count` int,