sqoop安装及使用
安装
下载地址:
http://archive.cloudera.com/cdh5/cdh/5/sqoop-1.4.6-cdh5.5.2.tar.gz
下载 sqoop-1.4.6-cdh5.5.2.tar.gz
解压后命名为sqoop-1.4.6
修改环境变量:
export SQOOP_HOME=/home/xuyao/下载/sqoop-1.4.6
export PATH= $PATH:$SQOOP_HOME/bin
export HIVE_CONF_DIR=/home/xuyao/下载/hive-2.0.1/conf
export HADOOP_CLASSPATH=$HADOOP_CLASSPATH:$HIVE_HOME/lib/*
修改sqoop-env.sh:
export HADOOP_COMMON_HOME=/home/xuyao/下载/hadoop-2.6.5
export HADOOP_MAPRED_HOME=/home/xuyao/下载/hadoop-2.6.5
export HIVE_HOME=/home/xuyao/下载/hive-2.0.1
修改bin/configure-sqoop:注释掉HCAT_HOME、ACCUMULO_HOME、ZOOKEEPER_HOME的检查。
## Moved to be a runtime check in sqoop.
#if [ ! -d "${HCAT_HOME}" ]; then
# echo "Warning: $HCAT_HOME does not exist! HCatalog jobs will fail."
# echo 'Please set $HCAT_HOME to the root of your HCatalog installation.'
#fi
#if [ ! -d "${ACCUMULO_HOME}" ]; then
# echo "Warning: $ACCUMULO_HOME does not exist! Accumulo imports will fail."
# echo 'Please set $ACCUMULO_HOME to the root of your Accumulo installation.'
#fi
#if [ ! -d "${ZOOKEEPER_HOME}" ]; then
# echo "Warning: $ZOOKEEPER_HOME does not exist! Accumulo imports will fail."
# echo 'Please set $ZOOKEEPER_HOME to the root of your Zookeeper installation.'
#fi
命令行输入sqoop help后:
将mysql-connector-java-5.1.40-bin.jar复制到sqoop的lib下面。
安装mysql:
sudo apt-get update
sudo apt-get install mysql-server mysql-client
在弹出的对话框中设置root的密码,就123好了。
sudo netstat -tap | grep mysql
检查是否有端口在监听
mysql -u root -p
输入密码123
create database mydatabase;
use mydatabase;
create table student
(
id int not null,
name varchar(50) not null,
age int not null,
primary key (id)
);
insert into student values(1,'zhangsan',20);
insert into student values(2,'lisi',21);
insert into student values(3,'wangwu',22);
select * from student;
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启动Hadoop,yarn
start-dfs.sh
start-yarn.sh
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导入
将mysql导入HDFS中:
sqoop import --connect jdbc:mysql://localhost/mydatabase --username root --password 123 --table student -m 1
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-m 表示启动N个map来并行导入数据,默认是4个,最好不要将数字设置为高于集群的节点数
默认放在/user/用户名/
查看:
hadoop fs -cat /user/xuyao/student/part-m-00000
在hive中建立表,注意用逗号:
Create Table student (id Int, name String, age Int) Row format delimited fields terminated By ',';
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将HDFS中的这个表导入HIVE中:
load data inpath '/user/xuyao/student' into table student;
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查看:
select * from student;
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还有种非常方便的把上面的过程结合起来的,但是会出现BUG,目前还没解决:
sqoop import --connect jdbc:mysql://localhost/mydatabase --username root --password 123 --table student -m 1 --hive-import
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导出
在mysql中建立:
Create Table dept (deptno Int,dname varchar(50));
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导出:
sqoop export --connect jdbc:mysql://localhost/mydatabase --username root --password 123 --table dept --export-dir /xy/hive/warehouse/dept --input-fields-terminated-by '\t'
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查看mysql:
select * from dept;
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