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zjilvufe:
顶!但是感觉10*60*1000,比较好,可以避免时间差问题。 ...
memcache过期时间的一点小小的分析 -
zjilvufe:
顶!但是感觉10*60*1000,比较好,可以避免时间差问题。 ...
memcache过期时间的一点小小的分析 -
zjilvufe:
顶!但是感觉10*60*1000,比较好,可以避免时间差问题。 ...
memcache过期时间的一点小小的分析 -
kentkwan:
完全看不出哪里异步新特性了 新开一个线程 servlet3以下 ...
tomcat7和Servlet3之异步特性体验 -
5cai:
D:\install\tomcat-7.0.29\webapp ...
tomcat7和Servlet3之异步特性体验
sqoop http://mirror.bit.edu.cn/apache/sqoop/1.4.1-incubating/sqoop-1.4.1-incubating__hadoop-0.20.tar.gz
mysql http://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-5.1.20.tar.gz/from/http://mysql.ntu.edu.tw/
安装好 sqoop、hbase。
下载jbdc驱动:mysql-connector-java-5.1.20.jar
将 mysql-connector-java-5.2.10.jar 拷贝到sqoop的lib下,同时拷贝hbase,zookeeper的jar到lib下
执行:
./sqoop import --connect jdbc:mysql://10.20.147.3/pm2 --username pm --password ×× --table acookie --hbase-table acookie --column-family acookie --hbase-create-table
12/05/24 14:49:55 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead.
12/05/24 14:49:55 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.
12/05/24 14:49:55 INFO tool.CodeGenTool: Beginning code generation
12/05/24 14:49:55 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `acookie` AS t LIMIT 1
12/05/24 14:49:55 INFO orm.CompilationManager: HADOOP_HOME is /home/hadoop/hadoop-0.20.203.0/bin/..
Note: /tmp/sqoop-hadoop/compile/d75d3a2bf713dd671b174830abc3da31/acookie.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
12/05/24 14:49:56 ERROR orm.CompilationManager: Could not rename /tmp/sqoop-hadoop/compile/d75d3a2bf713dd671b174830abc3da31/acookie.java to /home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/./acookie.java
12/05/24 14:49:56 INFO orm.CompilationManager: Writing jar file: /tmp/sqoop-hadoop/compile/d75d3a2bf713dd671b174830abc3da31/acookie.jar
12/05/24 14:49:56 WARN manager.MySQLManager: It looks like you are importing from mysql.
12/05/24 14:49:56 WARN manager.MySQLManager: This transfer can be faster! Use the --direct
12/05/24 14:49:56 WARN manager.MySQLManager: option to exercise a MySQL-specific fast path.
12/05/24 14:49:56 INFO manager.MySQLManager: Setting zero DATETIME behavior to convertToNull (mysql)
12/05/24 14:50:04 INFO mapreduce.ImportJobBase: Beginning import of acookie
12/05/24 14:50:10 INFO zookeeper.ZooKeeper: Client environment:zookeeper.version=3.3.2-1031432, built on 11/05/2010 05:32 GMT
12/05/24 14:50:10 INFO zookeeper.ZooKeeper: Client environment:host.name=node1
12/05/24 14:50:10 INFO zookeeper.ZooKeeper: Client environment:java.version=1.6.0_18
12/05/24 14:50:10 INFO zookeeper.ZooKeeper: Client environment:java.vendor=Sun Microsystems Inc.
12/05/24 14:50:10 INFO zookeeper.ZooKeeper: Client environment:java.home=/usr/alibaba/java/jre
12/05/24 14:50:10 INFO zookeeper.ZooKeeper: Client environment:java.class.path=/home/hadoop/hadoop-0.20.203.0/bin/../conf:/usr/alibaba/java/lib/tools.jar:/home/hadoop/hadoop-0.20.203.0/bin/..:/home/hadoop/hadoop-0.20.203.0/bin/../hadoop-core-0.20.203.0.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/aspectjrt-1.6.5.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/aspectjtools-1.6.5.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/commons-beanutils-1.7.0.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/commons-beanutils-core-1.8.0.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/commons-cli-1.2.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/commons-codec-1.4.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/commons-collections-3.2.1.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/commons-configuration-1.6.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/commons-daemon-1.0.1.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/commons-digester-1.8.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/commons-el-1.0.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/commons-httpclient-3.0.1.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/commons-lang-2.4.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/commons-logging-1.1.1.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/commons-logging-api-1.0.4.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/commons-math-2.1.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/commons-net-1.4.1.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/core-3.1.1.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/hsqldb-1.8.0.10.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/jackson-core-asl-1.0.1.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/jackson-mapper-asl-1.0.1.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/jasper-compiler-5.5.12.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/jasper-runtime-5.5.12.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/jets3t-0.6.1.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/jetty-6.1.26.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/jetty-util-6.1.26.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/jsch-0.1.42.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/junit-4.5.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/kfs-0.2.2.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/log4j-1.2.15.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/mockito-all-1.8.5.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/oro-2.0.8.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/servlet-api-2.5-20081211.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/slf4j-api-1.4.3.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/slf4j-log4j12-1.4.3.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/xmlenc-0.52.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/jsp-2.1/jsp-2.1.jar:/home/hadoop/hadoop-0.20.203.0/bin/../lib/jsp-2.1/jsp-api-2.1.jar:/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/../conf::/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/../lib/ant-contrib-1.0b3.jar:/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/../lib/ant-eclipse-1.0-jvm1.2.jar:/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/../lib/avro-1.5.3.jar:/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/../lib/avro-ipc-1.5.3.jar:/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/../lib/avro-mapred-1.5.3.jar:/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/../lib/commons-io-1.4.jar:/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/../lib/hbase-0.90.4.jar:/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/../lib/jackson-core-asl-1.7.3.jar:/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/../lib/jackson-mapper-asl-1.7.3.jar:/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/../lib/jopt-simple-3.2.jar:/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/../lib/mysql-connector-java-5.1.20-bin.jar:/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/../lib/paranamer-2.3.jar:/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/../lib/snappy-java-1.0.3.2.jar:/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/../lib/zookeeper-3.3.2.jar:/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/../sqoop-1.4.1-incubating.jar:/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin/../sqoop-test-1.4.1-incubating.jar:
12/05/24 14:50:10 INFO zookeeper.ZooKeeper: Client environment:java.library.path=/home/hadoop/hadoop-0.20.203.0/bin/../lib/native/Linux-amd64-64
12/05/24 14:50:10 INFO zookeeper.ZooKeeper: Client environment:java.io.tmpdir=/tmp
12/05/24 14:50:10 INFO zookeeper.ZooKeeper: Client environment:java.compiler=<NA>
12/05/24 14:50:10 INFO zookeeper.ZooKeeper: Client environment:os.name=Linux
12/05/24 14:50:10 INFO zookeeper.ZooKeeper: Client environment:os.arch=amd64
12/05/24 14:50:10 INFO zookeeper.ZooKeeper: Client environment:os.version=2.6.18-131.el5.customxen
12/05/24 14:50:10 INFO zookeeper.ZooKeeper: Client environment:user.name=hadoop
12/05/24 14:50:10 INFO zookeeper.ZooKeeper: Client environment:user.home=/home/hadoop
12/05/24 14:50:10 INFO zookeeper.ZooKeeper: Client environment:user.dir=/home/hadoop/sqoop-1.4.1-incubating__hadoop-0.20/bin
12/05/24 14:50:10 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=localhost:2181 sessionTimeout=180000 watcher=hconnection
12/05/24 14:50:10 INFO zookeeper.ClientCnxn: Opening socket connection to server localhost/127.0.0.1:2181
12/05/24 14:50:10 INFO zookeeper.ClientCnxn: Socket connection established to localhost/127.0.0.1:2181, initiating session
12/05/24 14:50:10 INFO zookeeper.ClientCnxn: Session establishment complete on server localhost/127.0.0.1:2181, sessionid = 0x3777b6dcd00029, negotiated timeout = 180000
12/05/24 14:50:10 INFO mapreduce.HBaseImportJob: Creating missing column family acookie
12/05/24 14:50:10 INFO client.HBaseAdmin: Started disable of acookie
12/05/24 14:50:12 INFO client.HBaseAdmin: Disabled acookie
12/05/24 14:50:12 INFO client.HBaseAdmin: Started enable of acookie
12/05/24 14:50:14 INFO client.HBaseAdmin: Enabled table acookie
12/05/24 14:50:15 INFO db.DataDrivenDBInputFormat: BoundingValsQuery: SELECT MIN(`ACOOKIE_ID`), MAX(`ACOOKIE_ID`) FROM `acookie`
12/05/24 14:50:15 WARN db.TextSplitter: Generating splits for a textual index column.
12/05/24 14:50:15 WARN db.TextSplitter: If your database sorts in a case-insensitive order, this may result in a partial import or duplicate records.
12/05/24 14:50:15 WARN db.TextSplitter: You are strongly encouraged to choose an integral split column.
12/05/24 14:50:16 INFO mapred.JobClient: Running job: job_201205231120_0008
12/05/24 14:50:17 INFO mapred.JobClient: map 0% reduce 0%
12/05/24 14:50:34 INFO mapred.JobClient: map 16% reduce 0%
12/05/24 14:50:37 INFO mapred.JobClient: map 33% reduce 0%
12/05/24 14:50:38 INFO mapred.JobClient: map 66% reduce 0%
12/05/24 14:50:40 INFO mapred.JobClient: map 83% reduce 0%
12/05/24 14:50:43 INFO mapred.JobClient: map 100% reduce 0%
12/05/24 14:50:48 INFO mapred.JobClient: Job complete: job_201205231120_0008
12/05/24 14:50:48 INFO mapred.JobClient: Counters: 13
12/05/24 14:50:48 INFO mapred.JobClient: Job Counters
12/05/24 14:50:48 INFO mapred.JobClient: SLOTS_MILLIS_MAPS=35523
12/05/24 14:50:48 INFO mapred.JobClient: Total time spent by all reduces waiting after reserving slots (ms)=0
12/05/24 14:50:48 INFO mapred.JobClient: Total time spent by all maps waiting after reserving slots (ms)=0
12/05/24 14:50:48 INFO mapred.JobClient: Launched map tasks=6
12/05/24 14:50:48 INFO mapred.JobClient: SLOTS_MILLIS_REDUCES=0
12/05/24 14:50:48 INFO mapred.JobClient: File Output Format Counters
12/05/24 14:50:48 INFO mapred.JobClient: Bytes Written=0
12/05/24 14:50:48 INFO mapred.JobClient: FileSystemCounters
12/05/24 14:50:48 INFO mapred.JobClient: HDFS_BYTES_READ=877
12/05/24 14:50:48 INFO mapred.JobClient: FILE_BYTES_WRITTEN=226202
12/05/24 14:50:48 INFO mapred.JobClient: File Input Format Counters
12/05/24 14:50:48 INFO mapred.JobClient: Bytes Read=0
12/05/24 14:50:48 INFO mapred.JobClient: Map-Reduce Framework
12/05/24 14:50:48 INFO mapred.JobClient: Map input records=72
12/05/24 14:50:48 INFO mapred.JobClient: Spilled Records=0
12/05/24 14:50:48 INFO mapred.JobClient: Map output records=72
12/05/24 14:50:48 INFO mapred.JobClient: SPLIT_RAW_BYTES=877
12/05/24 14:50:48 INFO mapreduce.ImportJobBase: Transferred 0 bytes in 33.7181 seconds (0 bytes/sec)
12/05/24 14:50:48 INFO mapreduce.ImportJobBase: Retrieved 72 records.
去hbase shell下,list查询,可以看到表已经建立,scan一下or
get 'acookie','7JzGBSJKrh0CAccdAHmqwaeu'
COLUMN CELL
acookie:ALIIM_ID timestamp=1337842232403, value=cnalichnmyetptest19
acookie:CREATOR timestamp=1337842232403, value=sys
acookie:GMT_CREATE timestamp=1337842232403, value=2011-01-26 13:34:15.0
acookie:GMT_MODIFIED timestamp=1337842232403, value=2011-01-26 16:11:01.0
acookie:MODIFIER timestamp=1337842232403, value=sys
acookie:corp_name timestamp=1337842232403, value=\xE4\xB8\xAD\xE5\x9B\xBDmyetptest19&\xE8\x9C\xBB\xE8\x84\xB2\
xE9\x9C\x81\xE6\x92\xAC\xE6\x9C\x89\xE9\x99\x90\xE5\x85\xAC\xE5\x8F\xB8
acookie:email timestamp=1337842232403, value=myetptest19@dfasf.com
acookie:gender timestamp=1337842232403, value=M
acookie:phone timestamp=1337842232403, value=86_0571_ 45683158
acookie:user_name timestamp=1337842232403, value=\xE5\xB7\xA1\xE5\x9C\x8A\xE7\x8A\x81
10 row(s) in 0.0410 seconds
附网上的导入命令参考:
Sqoop Import Examples:
Sqoop Import :- Import data from a relational database management system (RDBMS) such as MySQL or Oracle into the Hadoop Distributed File System (HDFS) and its subprojects (Hive, HBase).
Import the data (MySQL table) to HBase:
Case 1: If table have primary key and import all the column of MySQL table into HBase table.
$ bin/sqoop import --connect jdbc:mysql://localhost/db1 --username root --password root --table tableName --hbase-table hbase_tableName --column-family hbase_table_col1 --hbase-create-table
Case 2: If table have primary key and import only few columns of MySQL table into HBase table.
$ bin/sqoop import --connect jdbc:mysql://localhost/db1 --username root --password root --table tableName --hbase-table hbase_tableName --columns column1,column2 --column-family hbase_table_col1 --hbase-create-table
Note : Column names specified in --columns attribute must contain the primary key column.
Case 3: If table doesn't have primary key then choose one column as a hbase-row-key. Import all the column of MySQL table into HBase table.
$ bin/sqoop import --connect jdbc:mysql://localhost/db1 --username root --password root --table tableName --hbase-table hbase_tableName --column-family hbase_table_col1 --hbase-row-key column1 --hbase-create-table
Case 4: If table doesn't have primary key then choose one column as a hbase-row-key. Import only few columns of MySQL table into HBase table.
$ bin/sqoop import --connect jdbc:mysql://localhost/db1 --username root --password root --table tableName --hbase-table hbase_tableName --columns column1,column2 --column-family hbase_table_col --hbase-row-key column1 --hbase-create-table
Note: Column name specified in hbase-row-key atribute must be in columns list. Otherwise command will execute successfully but no records are inserted into hbase.
Note : The value of primary key column or column specified in --hbase-row-key attribute become the HBase row value. If MySQL table doesn't have primary key or column specified in --hbase-row-key attribute doesn't have unique value then there is a lost of few records.
Example : Let us consider a MySQL table test_table which have two columns name,address. The table test_table doesn't have primary key or unique key column.
Records of test_table:
________________
name address
----------------
abc 123
sqw 345
abc 125
sdf 1234
aql 23dw
Run the following command to import test_table data into HBase:
$ bin/sqoop import --connect jdbc:mysql://localhost/db1 --username root --password root --table test_table --hbase-table hbase_test_table --column-family test_table_col1 --hbase-row-key name --hbase-create-table
Only 4 records are visible into HBase table instead of 5. In above example two rows have same value 'abc' of name column and value of this column is used as a HBase row key value. If record having value 'abc' of name column come then thoes record will inserted into HBase table. Next time, another record having the same value 'abc' of name column come then thoes column will overwrite the value previous column.
Above problem also occured if table have composite primary key because the one column from composite key is used as a HBase row key.
Import the data (MySQL table) to Hive
Case 1: Import MySQL table into Hive if table have primary key.
bin/sqoop-import --connect jdbc:mysql://localhost:3306/db1 -username root -password password --table tableName --hive-table tableName --create-hive-table --hive-import --hive-home path/to/hive_home
Case 2: Import MySQL table into Hive if table doesn't have primary key.
$ bin/sqoop-import --connect jdbc:mysql://localhost:3306/db1 -username root -password password --table tableName --hive-table tableName --create-hive-table --hive-import --hive-home path/to/hive_home --split-by column_name
or
$ bin/sqoop-import --connect jdbc:mysql://localhost:3306/db1 -username root -password password --table tableName --hive-table tableName --create-hive-table --hive-import --hive-home path/to/hive_home -m 1
Import the data (MySQL table) to HDFS
Case 1: Import MySQL table into HDFS if table have primary key.
$ bin/sqoop import -connect jdbc:mysql://localhost:3306/db1 -username root -password password --table tableName --target-dir /user/ankit/tableName
Case 2: Import MySQL table into HDFS if table doesn't have primary key.
$ bin/sqoop import -connect jdbc:mysql://localhost:3306/db1 -username root -password password --table tableName --target-dir /user/ankit/tableName -m 1
Sqoop Export Examples:
Sqoop Export: export the HDFS and its subproject (Hive, HBase) data back into an RDBMS.
Export Hive table back to an RDBMS:
By default, Hive will stored data using ^A as a field delimiter and \n as a row delimiter.
$ bin/sqoop export --connect jdbc:mysql://localhost/test_db --table tableName --export-dir /user/hive/warehouse/tableName --username root --password password -m 1 --input-fields-terminated-by '\001'
where '\001' is octal representation of ^A.
发表评论
-
原子循环计数器
2016-01-22 16:27 892现实当中很多场景,需要进行轮训服务,比如轮训在10个日志文件 ... -
从字节码视角看java字符串的拼接
2016-01-22 16:21 1718搞java的都知道,string直接用+拼接的时候,java ... -
更快的AtomicInteger
2014-04-25 08:48 1388之前看了java8的longadder实现,最近又看到一篇 ... -
JAVA多线程和并发基础面试问答(转)
2014-02-11 16:04 900多线程和并发问题是Java技术面试中面试官比较喜欢问的问题之 ... -
AQS(同步器) 转
2013-10-22 19:22 1744Java.util.concurrent.locks.Abs ... -
Java对象占用内存大小
2013-08-02 11:44 17261new Object()将占用多少bytes的内存空间? ... -
tomcat7 servlet 3异步请求AsyncContext AsyncListener超时问题
2013-06-04 13:44 6628最近在用tomcat来搞servlet异步化请求,当然异步 ... -
java线程状态
2013-01-28 16:29 0NEW 至今尚未启动的线程的状态。 ... -
Hive与HBase
2012-05-23 14:22 4269hive是基于Hadoop的一个数据仓库工具,可以将结构化的 ... -
hadoop Map/Reduce 初试
2012-04-06 14:04 1995安装好了hadoop集群环境,详细见(hadoop安装),当然 ... -
hbase安装
2012-03-01 15:07 5234hbase依赖于hadoop环境, ... -
hadoop安装
2012-03-01 14:28 2228最近研究hbase,hbase依赖hadoop,当然需要安装一 ... -
Sun Hotspot JDK JVM参数设置调优--转载
2011-01-28 15:11 4545对于有2块CPU和2GB内存及更佳配置的服务器,Sun ... -
mysql sql利用索引
2010-07-15 20:14 1320select id,title from user limit ... -
Mysql之执行计划 查看索引利用情况 explain
2010-07-13 09:30 6588查看表索引 show index from table ... -
tomcat和jboss部署的区别
2010-01-25 19:54 4312开发环境图方便就直接使用了tomcat,但今天搭建测试环境 ... -
redhat下couchdb的安装
2009-12-11 19:19 3613CouchDB是用Erlang开发的面向文档的数据库系统,最近 ... -
org.springframework.beans.InvalidPropertyException
2009-11-26 13:34 4188今天使用spring的时候,突然发现原来spring也有点 ... -
oracle.jdbc.pool.OracleDataSource
2009-11-12 13:50 5380Oracle自带的JDBC放在了oracle.jdbc中 ... -
JVM调优
2009-10-12 14:53 4203从JRE1.3开始, GC都采用了 ...
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使用Sqoop将数据从MySQL导入HBase**: - 在MySQL中更新或添加数据后,使用Sqoop连接到MySQL并指定要导入的表。 - 设置HBase的连接信息,包括Zookeeper地址、表名等。 - 使用Sqoop的`--create-hbase-table`选项...
- 导入数据:使用Sqoop命令,指定HBase的表名和列族,将MySQL数据导入HBase。 3. **MySQL到Hive**: - 配置Hive:创建与MySQL表结构匹配的Hive表。 - 导入数据:使用Sqoop将MySQL数据导入Hive,数据会自动创建为...
利用sqoop把mysql数据导入到hbase中,建立phoenix与hbase的映射,用phoenix jdbc操作hbase!达到sql操作nosql!
通过 Sqoop导出到Hbase,需要先将数据导入HDFS,再用Hbase的Import命令将数据加载到Hbase表中。 - Hadoop MapReduce:可以编写自定义的MapReduce作业,将RDBMS数据读取、转换并写入Hbase。这种方法灵活性高,但开发...
3. Sqoop会生成MapReduce作业,执行数据导入过程,将数据从MySQL导入到HDFS。 ### 三、数据导出:HDFS->MySQL 1. 数据导出是逆向操作,使用`sqoop export`命令,指定HDFS中数据的路径,数据库连接参数,以及要写入...
本实验主要介绍了 HBase 数据迁移与数据备份和恢复的方法,包括使用 Sqoop 将 MySQL 数据导入到 HBase、将文本文件批量导入 HBase、使用 Hadoop DistCp 实现 HBase 的冷备份和热备份。 一、使用 Sqoop 将 MySQL ...
1.对文本文件形式的原始数据集进行...5.使用Sqoop将数据从MySQL导入HBase 6.使用HBase Java API把数据从本地导入到HBase中 7.使用R对MySQL中的数据进行可视化分析 内含三份报告和数据集,报告中有源码,是用spark做的
本压缩包"hadop安装文件.rar"提供了关于Hadoop及其相关组件(如Hive、HBase、Sqoop和MySQL)的安装步骤,这对于初学者和系统管理员来说是一份宝贵的资源。 首先,我们来详细了解一下Hadoop。Hadoop由Apache软件基金...
7. **Sqoop MySQL数据导入**:使用Sqoop将MySQL中的数据导入到Hive表中。 8. **R语言可视化分析**:利用R语言绘制图表,直观展示数据分析结果。 通过完成以上任务,不仅可以掌握各工具的具体操作步骤,还能深入理解...
在将 mysql 数据库中的表导入到 HDFS 中时,需要启动 hadoop,登录 mysql 数据库,查看 hive 数据库中有哪些表,然后使用 sqoop 命令将 hive 数据库中的表导入到 HDFS 中。最后,查看是否导入 HDFS 中。 Sqoop ...
使用Spark框架进行网站用户购物分析 目的 1、熟悉Linux系统、MySQL、Spark、HBase、...5、使用Sqoop将数据从MySQL导入HBase 6、使用HBase Java API把数据从本地导入到HBase中 7、使用R对MySQL中的数据进行可视化分析
最初的设计方案是通过 Sqoop 将数据从 PostgreSQL 导入到 Kafka,再通过存储程序将 Kafka 的数据保存至 Hive 或 HBase 中。然而,在实施过程中遇到了 Sqoop 版本兼容性问题: - **Sqoop1**:适用于命令行模式执行。...
本文将详细介绍如何在Hadoop2.6伪分布环境中安装配置Sqoop1.4.6,并进行简单的测试,包括启动Sqoop、MySQL服务以及如何实现从MySQL导入数据到HDFS和从HDFS导出数据到MySQL。 #### 安装环境准备 在开始之前,请确保...
综上所述,这个分布式数据库课程设计项目通过整合 Hbase、Hive、MySQL、Sqoop 等工具,实现了从数据采集、存储、分析到可视化的全流程,展现了大数据处理的一般流程和关键技术。通过实际操作,学习者可以深入理解和...
一旦数据在Hive中准备就绪,可以将其导入到一个关系型数据库(如MySQL、PostgreSQL等),因为这些数据库通常提供将数据导出为CSV、文本或HTML格式的功能。 以下是这个过程的详细步骤: 1. **HBase条件查询**:使用...