承接上节课，现在说说导出教程

检查连接

先看看有没有可用的connection 连接，如果没有就要根据上节课的方法创建一个

sqoop:000>  show connector --all
1 connector(s) to show:
Connector with id 1:
  Name: generic-jdbc-connector
 Class: org.apache.sqoop.connector.jdbc.GenericJdbcConnector
  Version: 1.99.3-cdh5.0.1
  Supported job types: [EXPORT, IMPORT]
    Connection form 1:

后面还有很长的输出我就不贴了，如果有就继续往下做

准备数据

mysql数据表准备

先在mysql 里面建立一个表 employee

CREATE TABLE `employee` (
  `id` int(11) NOT NULL,
  `name` varchar(20) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8; 

hadoop文件准备

在hadoop里面建立数据文件

先建立一个文件 part-m-00000

内容是

1,'michael'

把他们放到hadoop里面

# hdfs dfs -mkdir /user/alex
# hdfs dfs -put part-m-00000 /user/alex/
# hdfs dfs -ls /user/alex
Found 1 items
-rw-r--r--   2 root supergroup         20 2014-11-27 18:26 /user/alex/part-m-00000

导出

create job --xid 1 --type export

接下来按照提示输入

sqoop:000> create job --xid 1 --type export
Creating job for connection with id 1
Please fill following values to create new job object
Name: export to employee

Database configuration

Schema name:
Table name: employee
Table SQL statement:
Table column names:
Stage table name:
Clear stage table: 

Input configuration

Input directory: /user/alex

Throttling resources

Extractors:
Loaders:
New job was successfully created with validation status FINE  and persistent id 3

执行这个任务

sqoop:000> start job --jid 3
Submission details
Job ID: 3
Server URL: http://localhost:12000/sqoop/
Created by: root
Creation date: 2014-11-27 18:29:27 CST
Lastly updated by: root
External ID: job_1406097234796_0008
	http://xmseapp01:8088/proxy/application_1406097234796_0008/
2014-11-27 18:29:27 CST: BOOTING  - Progress is not available

然后等一会儿，再去看mysql的employee表就有一条michael 的记录了

下节课说下sqoop跟Hbase之间的通讯

后面还有很长的输出我就不贴了，如果有就继续往下做