大数据学习教程SD版第十一篇【Sqoop】

Sqoop 数据迁移工具

转换成 MapReduce 程序 执行，只有Mapper任务

SqlToHadoop InputFormat OutputFormat

1. 下载并解压安装包
2. 修改配置文件

sqoop-env.sh

#Set path to where bin/hadoop is available
export HADOOP_COMMON_HOME=/opt/module/hadoop-2.7.1
#Set path to where hadoop-*-core.jar is available
export HADOOP_MAPRED_HOME=/opt/module/hadoop-2.7.1
#set the path to where bin/hbase is available
export Hbase_HOME=/opt/module/hbase-1.3.1
#Set the path to where bin/hive is available
export HIVE_HOME=/opt/module/hive-3.1.2
#Set the path for where zookeper config dir is
export ZOOCFGDIR=/opt/module/zookeeper-3.5.7

3. 拷贝jdbc驱动包到lib下
4. 启动测试

bin/sqoop help

# connect mysql
bin/sqoop list-databases --connect jdbc:mysql://hadoop102:3306 --username root --password 000000

1. 全量导入

bin/sqoop import --connect jdbc:mysql://hadoop102:3306/datax --username root --password 000000 --table test1 --target-dir /sqoop/import/test1 --delete-target-dir --as-parquetfile -m 1

2. 查询导入

bin/sqoop import  --connect jdbc:mysql://hadoop102:3306/datax --username root --password 000000 --target-dir /sqoop/import/test2 --delete-target-dir -m 1 -e 'select id,name from test1 where id > 1001 and $CONDITIONS' --fields-terminated-by ','

3. 增量导入

– where 指定为每天更新的时间字段即可

bin/sqoop import --connect jdbc:mysql://hadoop102:3306/datax --username root --password 000000 --table test1 --target-dir /sqoop/import/test3 --delete-target-dir --as-parquetfile -m 1 --where 'id=1001'

#  hive target table 会自动创建
bin/sqoop import --connect jdbc:mysql://hadoop102:3306/datax --username root --password 000000 --table test1 -m 1 --hive-import --hive-overwrite --create-hive-table -hive-table test.hive_test1

# sqoop1.4.6 与 hbase1.3.1不兼容，不能自动创建表
bin/sqoop import --connect jdbc:mysql://hadoop102:3306/datax --username root --password 000000 --table test1 -m 1 --hbase-table hbase_test1 --column-family info --hbase-create-table --hbase-row-key id 

bin/sqoop export --connect jdbc:mysql://hadoop102:3306/datax --username root --password 000000 --table test1 -m 1 --export-dir /sqoop/import/test2 --input-fields-terminated-by ','

mysql2hdfs.opt

import 
--connect 
jdbc:mysql://hadoop102:3306/datax 
--username 
root 
--password
000000 
--table 
test1 
--target-dir 
/sqoop/import/test4
--delete-target-dir 
--as-parquetfile 
-m 
1

启动

bin/sqoop --options-file opt/mysql2hdfs.opt