Sqoop是一个用来将Hadoop和关系型数据库中的数据相互转移的工具，可以将一个关系型数据库（例如 ： MySQL ,Oracle
,Postgres等）中的数据导进到Hadoop的HDFS中，也可以将HDFS的数据导进到关系型数据库中。

Sqoop官方版本：http://apache.dataguru.cn/sqoop/1.4.2/

Sqoop CDH版本：http://archive.cloudera.com/cdh/3/sqoop-1.2.0-CDH3B4.tar.gz

Hadoop CDH版本：http://archive.cloudera.com/cdh/3/hadoop-0.20.2-CDH3B4.tar.gz

之前已经安装Hadoop-0.20.2，因sqoop官方版本不支持此版本，但可使用CDH3版本，如上面的下载链接。为了测试方便，可以通过拷贝相应的包到sqoop-1.2.0-CDH3B4/lib下，依然可以使用Hadoop-0.20.2版本。

sqoop版本:
sqoop-1.2.0-CDH3B4

Hadoop版本：0.20.2

mysql版本: 5.6.11

1）解压缩sqoop安装文件

[hadoop@node01 ~]$ tar -xzvf sqoop-1.2.0-CDH3B4.tar.gz

2）sqoop-1.2.0-CDH3B4依赖hadoop-core-0.20.2-CDH3B4.jar，所以你需要下载hadoop-
0.20.2-CDH3B4.tar.gz，解压缩后将hadoop-0.20.2-CDH3B4/hadoop-core-0.20.2-
CDH3B4.jar复制到sqoop-1.2.0-CDH3B4/lib中。

[hadoop@node01
~]$ cp hadoop-core-0.20.2-CDH3B4.jar
sqoop-1.2.0-CDH3B4/lib
[hadoop@node01 ~]$ ls -l
sqoop-1.2.0-CDH3B4/lib/hadoop-core-0.20.2-CDH3B4.jar
-rw-r--r--. 1 hadoop root 3452461
May  9 05:40
sqoop-1.2.0-CDH3B4/lib/hadoop-core-0.20.2-CDH3B4.jar

3）另外，sqoop导入mysql数据运行过程中依赖mysql-connector-java-*.jar，所以你需要下载mysql-connector-java-*.jar并复制到sqoop-1.2.0-CDH3B4/lib中

[hadoop@node01 ~]$ cp mysql-connector-java-5.1.24-bin.jar
sqoop-1.2.0-CDH3B4/lib
[hadoop@node01 ~]$ ls -l
sqoop-1.2.0-CDH3B4/lib/mysql-connector-java-5.1.24-bin.jar

-rw-r--r--. 1 hadoop root 846263
May  9 05:43
sqoop-1.2.0-CDH3B4/lib/mysql-connector-java-5.1.24-bin.jar

4）修改SQOOP的文件configure-sqoop，注释掉hbase和zookeeper检查（除非你准备使用HABASE等HADOOP上的组件），否则在进行hbase和zookeeper检查时，可能会卡在这里。

[hadoop@node01 bin]$ pwd
/home/hadoop/sqoop-1.2.0-CDH3B4/bin
[hadoop@node01 bin]$ vi configure-sqoop

#if [ -z "${HBASE_HOME}" ]; then
#  HBASE_HOME=/usr/lib/hbase

#fi
#if [ -z "${ZOOKEEPER_HOME}" ]; then
#  ZOOKEEPER_HOME=/usr/lib/zookeeper

#fi

#if [ ! -d "${HBASE_HOME}" ]; then
#  echo "Error: $HBASE_HOME does
not exist!"
#  echo 'Please set $HBASE_HOME
to the root of your HBase installation.'
#  exit 1
#fi
#if [ ! -d "${ZOOKEEPER_HOME}" ]; then
#  echo "Error: $ZOOKEEPER_HOME
does not exist!"
#  echo 'Please set
$ZOOKEEPER_HOME to the root of your ZooKeeper
installation.'
#  exit 1
#fi

5）启动Hadoop
[hadoop@node01 bin]$ start-all.sh
[hadoop@node01 bin]$ jps
2732 Jps
2478 NameNode
2665 JobTracker
2600 SecondaryNameNode

6）从MySQL导入数据到HDFS

（1）在MySQL里创建测试数据库sqooptest
[hadoop@node01 ~]$ mysql -u root -p
mysql> create database sqooptest;
Query OK, 1 row affected (0.01 sec)

（2）创建sqoop专有用户
mysql> create user 'sqoop' identified by 'sqoop';
Query OK, 0 rows affected (0.00 sec)

mysql> grant all privileges on *.* to 'sqoop' with grant
option;
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

（3）生成测试数据
mysql> use sqooptest;
Database changed
mysql> create table tb1 as select
table_schema,table_name,table_type from
information_schema.TABLES;
Query OK, 154 rows affected (0.28 sec)
Records: 154  Duplicates:
0  Warnings: 0

（4）测试sqoop与mysql的连接
[hadoop@node01 ~]$ sqoop list-databases --connect
jdbc:mysql://node01:3306/ --username sqoop --password
sqoop
13/05/09 06:15:01 WARN tool.BaseSqoopTool: Setting your password on
the command-line is insecure. Consider using -P instead.
13/05/09 06:15:01 INFO manager.MySQLManager: Executing SQL
statement: SHOW DATABASES
information_schema
hive
mysql
performance_schema
sqooptest
test

（5）从MySQL导入数据到HDFS
[hadoop@node01 ~]$ sqoop import --connect
jdbc:mysql://node01:3306/sqooptest --username sqoop --password
sqoop --table tb1 -m 1
13/05/09 06:16:39 WARN tool.BaseSqoopTool: Setting your password on
the command-line is insecure. Consider using -P instead.
13/05/09 06:16:39 INFO tool.CodeGenTool: Beginning code
generation
13/05/09 06:16:39 INFO manager.MySQLManager: Executing SQL
statement: SELECT t.* FROM `tb1` AS t LIMIT 1
13/05/09 06:16:39 INFO manager.MySQLManager: Executing SQL
statement: SELECT t.* FROM `tb1` AS t LIMIT 1
13/05/09 06:16:39 INFO orm.CompilationManager: HADOOP_HOME is
/home/hadoop/hadoop-0.20.2/bin/..
13/05/09 06:16:39 INFO orm.CompilationManager: Found hadoop core
jar at:
/home/hadoop/hadoop-0.20.2/bin/../hadoop-0.20.2-core.jar
13/05/09 06:16:42 INFO orm.CompilationManager: Writing jar file:
/tmp/sqoop-hadoop/compile/4175ce59fd53eb3de75875cfd3bd450b/tb1.jar

13/05/09 06:16:42 WARN manager.MySQLManager: It looks like you are
importing from mysql.
13/05/09 06:16:42 WARN manager.MySQLManager: This transfer can be
faster! Use the --direct
13/05/09 06:16:42 WARN manager.MySQLManager: option to exercise a
MySQL-specific fast path.
13/05/09 06:16:42 INFO manager.MySQLManager: Setting zero DATETIME
behavior to convertToNull (mysql)
13/05/09 06:16:42 INFO mapreduce.ImportJobBase: Beginning import of
tb1
13/05/09 06:16:43 INFO manager.MySQLManager: Executing SQL
statement: SELECT t.* FROM `tb1` AS t LIMIT 1
13/05/09 06:16:45 INFO mapred.JobClient: Running job:
job_201305090600_0001
13/05/09 06:16:46 INFO
mapred.JobClient:  map 0% reduce
0%
13/05/09 06:17:01 INFO
mapred.JobClient:  map 100%
reduce 0%
13/05/09 06:17:03 INFO mapred.JobClient: Job complete:
job_201305090600_0001
13/05/09 06:17:03 INFO mapred.JobClient: Counters: 5
13/05/09 06:17:03 INFO mapred.JobClient: 
 Job Counters
13/05/09 06:17:03 INFO mapred.JobClient: 
   Launched map
tasks=1
13/05/09 06:17:03 INFO mapred.JobClient: 
 FileSystemCounters
13/05/09 06:17:03 INFO mapred.JobClient: 
   HDFS_BYTES_WRITTEN=7072

13/05/09 06:17:03 INFO mapred.JobClient: 
 Map-Reduce Framework
13/05/09 06:17:03 INFO mapred.JobClient: 
   Map input
records=154
13/05/09 06:17:03 INFO mapred.JobClient: 
   Spilled
Records=0
13/05/09 06:17:03 INFO mapred.JobClient: 
   Map output
records=154
13/05/09 06:17:03 INFO mapreduce.ImportJobBase: Transferred 6.9062
KB in 19.9871 seconds (353.8277 bytes/sec)
13/05/09 06:17:03 INFO mapreduce.ImportJobBase: Retrieved 154
records.

（6）在HDFS上查看刚刚导入的数据
[hadoop@node01 ~]$ hadoop dfs -ls tb1
Found 2 items
drwxr-xr-x   - hadoop
supergroup    
     0
2013-05-09 06:16 /user/hadoop/tb1/_logs
-rw-r--r--   2 hadoop
supergroup    
  7072 2013-05-09 06:16
/user/hadoop/tb1/part-m-00000

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