1.注意win下直接复制进linux 改一下–等
csharp;gutter:true;
sqoop-list-databases --connect jdbc:mysql://122.206.79.212:3306/ --username root -P</p>
<pre><code>
先看一下是什么数据库，发现有些数据库，可以查询数据库就可以导入，很奇怪。<details><summary>[En]</summary>First take a look at what database, found that some databases, can query the database can be imported, very strange.</details>
2.导入到hdfs
;gutter:true;
sqoop import –connect jdbc:mysql://122.206.79.212:3306/dating –username root –password 123456 –table t_rec_top –driver com.mysql.jdbc.Driver
数据库端口号、帐户名、密码，那张表不需要添加驱动程序，那么它就不指定导入到HDFS的位置，必须有一个默认位置。
[En]
The database port number, account name, password, that table does not need to add a driver, then it does not specify where to import to hdfs, there must be a default location.
您可以看到，只有映射任务，而没有减去任务
[En]
You can see that there are only map tasks but no reduce tasks
csharp;gutter:true;
Warning: /home/hxsyl/Spark_Relvant/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/../hcatalog does not exist! HCatalog jobs will fail.</p>
<p>Please set $HCAT_HOME to the root of your HCatalog installation.</p>
<p>Warning: /home/hxsyl/Spark_Relvant/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/../accumulo does not exist! Accumulo imports will fail.</p>
<p>Please set $ACCUMULO_HOME to the root of your Accumulo installation.</p>
<p>17/03/15 11:05:12 INFO sqoop.Sqoop: Running Sqoop version: 1.4.6
17/03/15 11:05:12 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead.</p>
<p>17/03/15 11:05:12 WARN sqoop.ConnFactory: Parameter --driver is set to an explicit driver however appropriate connection manager is not being set (via --connection-manager). Sqoop is going to fall back to org.apache.sqoop.manager.GenericJdbcManager. Please specify explicitly which connection manager should be used next time.</p>
<p>17/03/15 11:05:12 INFO manager.SqlManager: Using default fetchSize of 1000
17/03/15 11:05:12 INFO tool.CodeGenTool: Beginning code generation
17/03/15 11:05:13 INFO manager.SqlManager: Executing SQL statement: SELECT t.<em> FROM t_rec_top AS t WHERE 1=0
17/03/15 11:05:13 INFO manager.SqlManager: Executing SQL statement: SELECT t.</em> FROM t_rec_top AS t WHERE 1=0
17/03/15 11:05:13 INFO orm.CompilationManager: HADOOP_MAPRED_HOME is /home/hxsyl/Spark_Relvant/hadoop-2.6.4/share/hadoop/mapreduce
Note: /tmp/sqoop-hxsyl/compile/ddeeb02cdbd25cddc2662317b89c80f1/t_rec_top.java uses or overrides a deprecated API.</p>
<p>Note: Recompile with -Xlint:deprecation for details.</p>
<p>17/03/15 11:05:18 INFO orm.CompilationManager: Writing jar file: /tmp/sqoop-hxsyl/compile/ddeeb02cdbd25cddc2662317b89c80f1/t_rec_top.jar
17/03/15 11:05:18 INFO mapreduce.ImportJobBase: Beginning import of t_rec_top
SLF4J: Class path contains multiple SLF4J bindings.</p>
<p>SLF4J: Found binding in [jar:file:/home/hxsyl/Spark_Relvant/hadoop-2.6.4/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/home/hxsyl/Spark_Relvant/hbase-1.2.4/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.</p>
<p>SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
17/03/15 11:05:19 INFO Configuration.deprecation: mapred.jar is deprecated. Instead, use mapreduce.job.jar
17/03/15 11:05:19 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM t_rec_top AS t WHERE 1=0
17/03/15 11:05:21 INFO Configuration.deprecation: mapred.map.tasks is deprecated. Instead, use mapreduce.job.maps
17/03/15 11:05:21 INFO client.RMProxy: Connecting to ResourceManager at CentOSMaster/192.168.58.180:8032
17/03/15 11:05:28 INFO db.DBInputFormat: Using read commited transaction isolation
17/03/15 11:05:28 INFO db.DataDrivenDBInputFormat: BoundingValsQuery: SELECT MIN(id), MAX(id) FROM t_rec_top
17/03/15 11:05:28 INFO mapreduce.JobSubmitter: number of splits:1
17/03/15 11:05:29 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1489547007191_0001
17/03/15 11:05:30 INFO impl.YarnClientImpl: Submitted application application_1489547007191_0001
17/03/15 11:05:31 INFO mapreduce.Job: The url to track the job: http://CentOSMaster:8088/proxy/application_1489547007191_0001/
17/03/15 11:05:31 INFO mapreduce.Job: Running job: job_1489547007191_0001
17/03/15 11:05:48 INFO mapreduce.Job: Job job_1489547007191_0001 running in uber mode : false
17/03/15 11:05:48 INFO mapreduce.Job: map 0% reduce 0%
17/03/15 11:06:06 INFO mapreduce.Job: map 100% reduce 0%
17/03/15 11:06:07 INFO mapreduce.Job: Job job_1489547007191_0001 completed successfully
17/03/15 11:06:07 INFO mapreduce.Job: Counters: 30
File System Counters
FILE: Number of bytes read=0
FILE: Number of bytes written=127058
FILE: Number of read operations=0
FILE: Number of large read operations=0
FILE: Number of write operations=0
HDFS: Number of bytes read=99
HDFS: Number of bytes written=21
HDFS: Number of read operations=4
HDFS: Number of large read operations=0
HDFS: Number of write operations=2
Job Counters
Launched map tasks=1
Other local map tasks=1
Total time spent by all maps in occupied slots (ms)=13150
Total time spent by all reduces in occupied slots (ms)=0
Total time spent by all map tasks (ms)=13150
Total vcore-milliseconds taken by all map tasks=13150
Total megabyte-milliseconds taken by all map tasks=13465600
Map-Reduce Framework
Map input records=1
Map output records=1
Input split bytes=99
Spilled Records=0
Failed Shuffles=0
Merged Map outputs=0
GC time elapsed (ms)=183
CPU time spent (ms)=1200
Physical memory (bytes) snapshot=107761664
Virtual memory (bytes) snapshot=2069635072
Total committed heap usage (bytes)=30474240
File Input Format Counters
Bytes Read=0
File Output Format Counters
Bytes Written=21
17/03/15 11:06:07 INFO mapreduce.ImportJobBase: Transferred 21 bytes in 46.7701 seconds (0.449 bytes/sec)
17/03/15 11:06:07 INFO mapreduce.ImportJobBase: Retrieved 1 records.</p>
<pre><code>
创建一个user/yonhumig的目录，其中t_rec_top里就是我们的数据，不过没有标头，可以看出只是以m，表示map任务就结束了
wc00是配置文件
;collapse:true;;gutter:true;
"AS 1
"License"); 1
${yarn.nodemanager.local-dirs}/usercache/${user}/appcache/application_${appid}. 1
(the 1
–> 3
2.0 1
Original: https://www.cnblogs.com/hxsyl/p/6553033.html
Author: 加拿大小哥哥
Title: Sqoop导入到hdfs
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