Hive 配置

下载hive 现在的版本是0.10, 打算是吧元数据存在mysql 里面的.

1.设置 hive_home 环境

2.在 /hive_home/conf 下 添加配置文件

<configuration>
<property>  
        <name>hive.metastore.local</name>  
        <value>true</value>  
        <description>controls whether to connect to remove metastore server or open a new metastore server in Hive Client JVM</description>
</property>
<!--   mysql 的东西  -->
<property>  
        <name>javax.jdo.option.ConnectionURL</name>  
        <value>jdbc:mysql://10.158.166.3:3306/hive</value>  
        <description>JDBC connect string for a JDBC metastore</description>
</property>
<property>  
        <name>javax.jdo.option.ConnectionDriverName</name>  
        <value>com.mysql.jdbc.Driver</value>  
        <description>Driver class name for a JDBC metastore</description>
</property>
<property>  
        <name>javax.jdo.option.ConnectionUserName</name>  
        <value>root</value>  
        <description>username to use against metastore database</description>
</property>
<property>  
        <name>javax.jdo.option.ConnectionPassword</name>  
        <value>root</value>  
        <description>password to use against metastore database</description>
</property>


<!--   web 页面的东西  -->
<property>
  <name>hive.hwi.listen.host</name>
  <value>0.0.0.0</value>
  <description>This is the host address the Hive Web Interface will listen on</description>
</property>

<property>
  <name>hive.hwi.listen.port</name>
  <value>9999</value>
  <description>This is the port the Hive Web Interface will listen on</description>
</property>

<!--   hwi war包位置  -->
<property>
  <name>hive.hwi.war.file</name>
  <value>lib/hive-hwi-0.10.0.war</value>
  <description>This is the WAR file with the jsp content for Hive Web Interface</description>
</property>


<!--   HDFS 中所放的位置  -->
<property> 
  <name>hive.metastore.warehouse.dir</name> 
  <value>/home/hive/warehouse</value> 
  <description>location of default database for the warehouse</description> 
</property>
<!--   配置log 路径  -->
<property> 
  <name>hive.querylog.location</name> 
  <value>/u01/hive/logs</value> 
  <description>location of log</description> 
</property>
</configuration>

3.去mysql 建数据库.hive.  字符集必须用拉丁的.否则会报错的.

4.命令行 输入 hive 进入.

5.如果是远程开发的. 还要打开远程端口.

nohup hive --service hiveserver 

nohup hive --service hwi

nohup  是linux 后台继续的命令.

成功后 就可以用 http://10.221.62.68:9999/hwi/ web访问.

6.hiveserver 的默认端口是10000

使用hive的官方例子.

package org.apache.hadoop.examples.hive;

import java.sql.SQLException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.sql.DriverManager;

public class HiveJdbcClient {
	private static String driverName = "org.apache.hadoop.hive.jdbc.HiveDriver";

	/**
	 * @param args
	 * @throws SQLException
	 */
	public static void main(String[] args) throws SQLException {
		try {
			Class.forName(driverName);
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			System.exit(1);
		}
		Connection con = DriverManager.getConnection(
				"jdbc:hive://10.221.62.68:10000/hive", "", "");
		Statement stmt = con.createStatement();
		
		//drop
		String tableName = "testHiveDriverTable";
		stmt.executeQuery("drop table " + tableName);
		
		
		//create
		ResultSet res = stmt.executeQuery("create table " + tableName
				+ " (key int, value string)");
		
		// show tables
		String sql = "show tables '" + tableName + "'";
		System.out.println("Running: " + sql);
		res = stmt.executeQuery(sql);
		if (res.next()) {
			System.out.println(res.getString(1));
		}
		// describe table
		sql = "describe " + tableName;
		System.out.println("Running: " + sql);
		res = stmt.executeQuery(sql);
		while (res.next()) {
			System.out.println(res.getString(1) + "\t" + res.getString(2));
		}

		// load data into table
		// NOTE: filepath has to be local to the hive server
		// NOTE: /tmp/a.txt is a ctrl-A separated file with two fields per line
		String filepath = "/tmp/a.txt";
		sql = "load data local inpath '" + filepath + "' into table "
				+ tableName;
		System.out.println("Running: " + sql);
		res = stmt.executeQuery(sql);

		// select * query
		sql = "select * from " + tableName;
		System.out.println("Running: " + sql);
		res = stmt.executeQuery(sql);
		while (res.next()) {
			System.out.println(String.valueOf(res.getInt(1)) + "\t"
					+ res.getString(2));
		}

		// regular hive query
		sql = "select count(1) from " + tableName;
		System.out.println("Running: " + sql);
		res = stmt.executeQuery(sql);
		while (res.next()) {
			System.out.println(res.getString(1));
		}
	}
}

 改下ip 就可以运行了.

如果 hiveserver  没有起来的话 是会报connection的错.