Hbase 简明教程

$ su
password:
# useradd hadoop
# passwd hadoop
New passwd:
Retype new passwd

$ ssh-keygen -t rsa
$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
$ chmod 0600 ~/.ssh/authorized_keys

ssh localhost

$ cd Downloads/
$ ls
jdk-7u71-linux-x64.gz

$ tar zxf jdk-7u71-linux-x64.gz
$ ls
jdk1.7.0_71 jdk-7u71-linux-x64.gz

$ su
password:
# mv jdk1.7.0_71 /usr/local/
# exit

export JAVA_HOME=/usr/local/jdk1.7.0_71
export PATH= $PATH:$JAVA_HOME/bin

$ source ~/.bashrc

# alternatives --install /usr/bin/java java usr/local/java/bin/java 2

# alternatives --install /usr/bin/javac javac usr/local/java/bin/javac 2

# alternatives --install /usr/bin/jar jar usr/local/java/bin/jar 2


# alternatives --set java usr/local/java/bin/java

# alternatives --set javac usr/local/java/bin/javac

# alternatives --set jar usr/local/java/bin/jar

export HADOOP_HOME=/usr/local/hadoop
export HADOOP_MAPRED_HOME=$HADOOP_HOME
export HADOOP_COMMON_HOME=$HADOOP_HOME
export HADOOP_HDFS_HOME=$HADOOP_HOME
export YARN_HOME=$HADOOP_HOME
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export PATH=$PATH:$HADOOP_HOME/sbin:$HADOOP_HOME/bin
export HADOOP_INSTALL=$HADOOP_HOME

$ source ~/.bashrc

$ cd $HADOOP_HOME/etc/hadoop

export JAVA_HOME=/usr/local/jdk1.7.0_71

<configuration>
   <property>
      <name>fs.default.name</name>
      <value>hdfs://localhost:9000</value>
   </property>
</configuration>

dfs.replication (data replication value) = 1
(In the below given path /hadoop/ is the user name.
hadoopinfra/hdfs/namenode is the directory created by hdfs file system.)

namenode path = //home/hadoop/hadoopinfra/hdfs/namenode
(hadoopinfra/hdfs/datanode is the directory created by hdfs file system.)

datanode path = //home/hadoop/hadoopinfra/hdfs/datanode

<configuration>
   <property>
      <name>dfs.replication</name >
      <value>1</value>
   </property>

   <property>
      <name>dfs.name.dir</name>
      <value>file:///home/hadoop/hadoopinfra/hdfs/namenode</value>
   </property>

   <property>
      <name>dfs.data.dir</name>
      <value>file:///home/hadoop/hadoopinfra/hdfs/datanode</value>
   </property>
</configuration>

<configuration>
   <property>
      <name>yarn.nodemanager.aux-services</name>
      <value>mapreduce_shuffle</value>
   </property>
</configuration>

$ cp mapred-site.xml.template mapred-site.xml

<configuration>
   <property>
      <name>mapreduce.framework.name</name>
      <value>yarn</value>
   </property>
</configuration>

$ cd ~
$ hdfs namenode -format

10/24/14 21:30:55 INFO namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG: host = localhost/192.168.1.11
STARTUP_MSG: args = [-format]
STARTUP_MSG: version = 2.4.1
...
...
10/24/14 21:30:56 INFO common.Storage: Storage directory
/home/hadoop/hadoopinfra/hdfs/namenode has been successfully formatted.
10/24/14 21:30:56 INFO namenode.NNStorageRetentionManager: Going to
retain 1 images with txid >= 0
10/24/14 21:30:56 INFO util.ExitUtil: Exiting with status 0
10/24/14 21:30:56 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at localhost/192.168.1.11
************************************************************/

$ start-dfs.sh

10/24/14 21:37:56
Starting namenodes on [localhost]
localhost: starting namenode, logging to /home/hadoop/hadoop-
2.4.1/logs/hadoop-hadoop-namenode-localhost.out
localhost: starting datanode, logging to /home/hadoop/hadoop-
2.4.1/logs/hadoop-hadoop-datanode-localhost.out
Starting secondary namenodes [0.0.0.0]

$ start-yarn.sh

starting yarn daemons
starting resourcemanager, logging to /home/hadoop/hadoop-
2.4.1/logs/yarn-hadoop-resourcemanager-localhost.out
localhost: starting nodemanager, logging to /home/hadoop/hadoop-
2.4.1/logs/yarn-hadoop-nodemanager-localhost.out

http://localhost:50070

http://localhost:8088/

$cd usr/local/
$wget http://www.interior-dsgn.com/apache/hbase/stable/hbase-0.98.8-
hadoop2-bin.tar.gz
$tar -zxvf hbase-0.98.8-hadoop2-bin.tar.gz

$su
$password: enter your password here
mv hbase-0.99.1/* Hbase/

cd /usr/local/Hbase/conf
gedit hbase-env.sh

export JAVA_HOME=/usr/lib/jvm/java-1.7.0

#cd /usr/local/HBase/
#cd conf
# gedit hbase-site.xml

<configuration>
   //Here you have to set the path where you want HBase to store its files.
   <property>
      <name>hbase.rootdir</name>
      <value>file:/home/hadoop/HBase/HFiles</value>
   </property>

   //Here you have to set the path where you want HBase to store its built in zookeeper  files.
   <property>
      <name>hbase.zookeeper.property.dataDir</name>
      <value>/home/hadoop/zookeeper</value>
   </property>
</configuration>

$cd /usr/local/HBase/bin
$./start-hbase.sh

starting master, logging to /usr/local/HBase/bin/../logs/hbase-tpmaster-localhost.localdomain.out

<property>
   <name>hbase.cluster.distributed</name>
   <value>true</value>
</property>

<property>
   <name>hbase.rootdir</name>
   <value>hdfs://localhost:8030/hbase</value>
</property>

$cd /usr/local/HBase
$bin/start-hbase.sh

$ ./bin/hadoop fs -ls /hbase

Found 7 items
drwxr-xr-x - hbase users 0 2014-06-25 18:58 /hbase/.tmp
drwxr-xr-x - hbase users 0 2014-06-25 21:49 /hbase/WALs
drwxr-xr-x - hbase users 0 2014-06-25 18:48 /hbase/corrupt
drwxr-xr-x - hbase users 0 2014-06-25 18:58 /hbase/data
-rw-r--r-- 3 hbase users 42 2014-06-25 18:41 /hbase/hbase.id
-rw-r--r-- 3 hbase users 7 2014-06-25 18:41 /hbase/hbase.version
drwxr-xr-x - hbase users 0 2014-06-25 21:49 /hbase/oldWALs

$cd $HADOOP_HOME/sbin
$start-all.sh

$cd /usr/local/HBase
$./bin/start-hbase.sh

$./bin/local-master-backup.sh start 2 (number signifies specific
server.)

$./bin/./local-regionservers.sh start 3

$cd bin
$./hbase shell

2014-12-09 14:24:27,526 INFO [main] Configuration.deprecation:
hadoop.native.lib is deprecated. Instead, use io.native.lib.available
HBase Shell; enter 'help<RETURN>' for list of supported commands.
Type "exit<RETURN>" to leave the HBase Shell
Version 0.98.8-hadoop2, r6cfc8d064754251365e070a10a82eb169956d5fe, Fri
Nov 14 18:26:29 PST 2014

hbase(main):001:0>

$ gedit ~/.bashrc

export CLASSPATH = $CLASSPATH://home/hadoop/hbase/lib/*

hbase(main):002:0> create 'emp', 'personal data', 'professional data'

0 row(s) in 1.1300 seconds
=> Hbase::Table - emp

hbase(main):002:0> list
TABLE
emp
2 row(s) in 0.0340 seconds

Configuration conf = HBaseConfiguration.create();
HBaseAdmin admin = new HBaseAdmin(conf);

//creating table descriptor
HTableDescriptor table = new HTableDescriptor(toBytes("Table name"));

//creating column family descriptor
HColumnDescriptor family = new HColumnDescriptor(toBytes("column family"));

//adding coloumn family to HTable
table.addFamily(family);

admin.createTable(table);

import java.io.IOException;

import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.TableName;

import org.apache.hadoop.conf.Configuration;

public class CreateTable {

   public static void main(String[] args) throws IOException {

      // Instantiating configuration class
      Configuration con = HBaseConfiguration.create();

      // Instantiating HbaseAdmin class
      HBaseAdmin admin = new HBaseAdmin(con);

      // Instantiating table descriptor class
      HTableDescriptor tableDescriptor = new
      HTableDescriptor(TableName.valueOf("emp"));

      // Adding column families to table descriptor
      tableDescriptor.addFamily(new HColumnDescriptor("personal"));
      tableDescriptor.addFamily(new HColumnDescriptor("professional"));

      // Execute the table through admin
      admin.createTable(tableDescriptor);
      System.out.println(" Table created ");
   }
}

$javac CreateTable.java
$java CreateTable

Table created

//creating a configuration object
Configuration conf = HBaseConfiguration.create();

//Creating HBaseAdmin object
HBaseAdmin admin = new HBaseAdmin(conf);

//Getting all the list of tables using HBaseAdmin object
HTableDescriptor[] tableDescriptor = admin.listTables();

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.MasterNotRunningException;
import org.apache.hadoop.hbase.client.HBaseAdmin;

public class ListTables {

   public static void main(String args[])throws MasterNotRunningException, IOException{

      // Instantiating a configuration class
      Configuration conf = HBaseConfiguration.create();

      // Instantiating HBaseAdmin class
      HBaseAdmin admin = new HBaseAdmin(conf);

      // Getting all the list of tables using HBaseAdmin object
      HTableDescriptor[] tableDescriptor = admin.listTables();

      // printing all the table names.
      for (int i=0; i<tableDescriptor.length;i++ ){
         System.out.println(tableDescriptor[i].getNameAsString());
      }

   }
}

$javac ListTables.java
$java ListTables

User
emp

hbase(main):025:0> disable 'emp'
0 row(s) in 1.2760 seconds

hbase(main):028:0> scan 'emp'
ROW         COLUMN + CELL
ERROR: emp is disabled.

hbase> is_disabled 'table name'

hbase(main):031:0> is_disabled 'emp'
true
0 row(s) in 0.0440 seconds

hbase> disable_all 'r.*'

hbase(main):002:07> disable_all 'raj.*'
raja
rajani
rajendra
rajesh
raju
Disable the above 5 tables (y/n)?
y
5 tables successfully disabled

// Creating configuration object
Configuration conf = HBaseConfiguration.create();

// Creating HBaseAdmin object
HBaseAdmin admin = new HBaseAdmin(conf);

Boolean b = admin.isTableDisabled("emp");

if(!b){
   admin.disableTable("emp");
   System.out.println("Table disabled");
}

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.MasterNotRunningException;
import org.apache.hadoop.hbase.client.HBaseAdmin;

public class DisableTable{

   public static void main(String args[]) throws MasterNotRunningException, IOException{

      // Instantiating configuration class
      Configuration conf = HBaseConfiguration.create();

      // Instantiating HBaseAdmin class
      HBaseAdmin admin = new HBaseAdmin(conf);

      // Verifying weather the table is disabled
      Boolean bool = admin.isTableDisabled("emp");
      System.out.println(bool);

      // Disabling the table using HBaseAdmin object
      if(!bool){
         admin.disableTable("emp");
         System.out.println("Table disabled");
      }
   }
}

$javac DisableTable.java
$java DsiableTable

false
Table disabled

hbase(main):005:0> enable 'emp'
0 row(s) in 0.4580 seconds

hbase(main):006:0> scan 'emp'

   ROW                        COLUMN + CELL

1 column = personal data:city, timestamp = 1417516501, value = hyderabad

1 column = personal data:name, timestamp = 1417525058, value = ramu

1 column = professional data:designation, timestamp = 1417532601, value = manager

1 column = professional data:salary, timestamp = 1417524244109, value = 50000

2 column = personal data:city, timestamp = 1417524574905, value = chennai

2 column = personal data:name, timestamp = 1417524556125, value = ravi

2 column = professional data:designation, timestamp = 14175292204, value = sr:engg

2 column = professional data:salary, timestamp = 1417524604221, value = 30000

3 column = personal data:city, timestamp = 1417524681780, value = delhi

3 column = personal data:name, timestamp = 1417524672067, value = rajesh

3 column = professional data:designation, timestamp = 14175246987, value = jr:engg

3 column = professional data:salary, timestamp = 1417524702514, value = 25000

3 row(s) in 0.0400 seconds

// Creating configuration object
Configuration conf = HBaseConfiguration.create();

// Creating HBaseAdmin object
HBaseAdmin admin = new HBaseAdmin(conf);

Boolean bool = admin.isTableEnabled("emp");

if(!bool){
   admin.enableTable("emp");
   System.out.println("Table enabled");
}

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.MasterNotRunningException;
import org.apache.hadoop.hbase.client.HBaseAdmin;

public class EnableTable{

   public static void main(String args[]) throws MasterNotRunningException, IOException{

      // Instantiating configuration class
      Configuration conf = HBaseConfiguration.create();

      // Instantiating HBaseAdmin class
      HBaseAdmin admin = new HBaseAdmin(conf);

      // Verifying whether the table is disabled
      Boolean bool = admin.isTableEnabled("emp");
      System.out.println(bool);

      // Enabling the table using HBaseAdmin object
      if(!bool){
         admin.enableTable("emp");
         System.out.println("Table Enabled");
      }
   }
}

$javac EnableTable.java
$java EnableTable

false
Table Enabled

hbase> alter 't1', NAME ⇒ 'f1', VERSIONS ⇒ 5

hbase(main):003:0> alter 'emp', NAME ⇒ 'personal data', VERSIONS ⇒ 5
Updating all regions with the new schema...
0/1 regions updated.
1/1 regions updated.
Done.
0 row(s) in 2.3050 seconds

hbase>alter 't1', READONLY(option)

hbase(main):006:0> alter 'emp', READONLY
Updating all regions with the new schema...
0/1 regions updated.
1/1 regions updated.
Done.
0 row(s) in 2.2140 seconds

hbase> alter 't1', METHOD ⇒ 'table_att_unset', NAME ⇒ 'MAX_FILESIZE'

hbase> alter ‘ table name ’, ‘delete’ ⇒ ‘ column family ’

hbase(main):006:0> scan 'employee'

   ROW                   COLUMN+CELL

row1 column = personal:city, timestamp = 1418193767, value = hyderabad

row1 column = personal:name, timestamp = 1418193806767, value = raju

row1 column = professional:designation, timestamp = 1418193767, value = manager

row1 column = professional:salary, timestamp = 1418193806767, value = 50000

1 row(s) in 0.0160 seconds

hbase(main):007:0> alter 'employee','delete'⇒'professional'
Updating all regions with the new schema...
0/1 regions updated.
1/1 regions updated.
Done.
0 row(s) in 2.2380 seconds

hbase(main):003:0> scan 'employee'
   ROW             COLUMN + CELL
row1 column = personal:city, timestamp = 14181936767, value = hyderabad

row1 column = personal:name, timestamp = 1418193806767, value = raju

1 row(s) in 0.0830 seconds

// Instantiating configuration object
Configuration conf = HBaseConfiguration.create();

// Instantiating HBaseAdmin class
HBaseAdmin admin = new HBaseAdmin(conf);

// Instantiating columnDescriptor object

HColumnDescriptor columnDescriptor = new
HColumnDescriptor("contactDetails");

// Adding column family
admin.addColumn("employee", new HColumnDescriptor("columnDescriptor"));

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.MasterNotRunningException;
import org.apache.hadoop.hbase.client.HBaseAdmin;

public class AddColoumn{

   public static void main(String args[]) throws MasterNotRunningException, IOException{

      // Instantiating configuration class.
      Configuration conf = HBaseConfiguration.create();

      // Instantiating HBaseAdmin class.
      HBaseAdmin admin = new HBaseAdmin(conf);

      // Instantiating columnDescriptor class
      HColumnDescriptor columnDescriptor = new HColumnDescriptor("contactDetails");

      // Adding column family
      admin.addColumn("employee", columnDescriptor);
      System.out.println("coloumn added");
   }
}

$javac AddColumn.java
$java AddColumn

//if "/home/home/hadoop/hbase " is your Hbase home folder then.

$javac -cp /home/hadoop/hbase/lib/*: Demo.java

column added

// Instantiating configuration object
Configuration conf = HBaseConfiguration.create();

// Instantiating HBaseAdmin class
HBaseAdmin admin = new HBaseAdmin(conf);

// Deleting column family
admin.deleteColumn("employee", "contactDetails");

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.MasterNotRunningException;
import org.apache.hadoop.hbase.client.HBaseAdmin;

public class DeleteColoumn{

   public static void main(String args[]) throws MasterNotRunningException, IOException{

      // Instantiating configuration class.
      Configuration conf = HBaseConfiguration.create();

      // Instantiating HBaseAdmin class.
      HBaseAdmin admin = new HBaseAdmin(conf);

      // Deleting a column family
      admin.deleteColumn("employee","contactDetails");
      System.out.println("coloumn deleted");
   }
}

$javac DeleteColumn.java
$java DeleteColumn

column deleted

Instantiate the HBaseAdimn class

// Instantiating configuration object
Configuration conf = HBaseConfiguration.create();

// Instantiating HBaseAdmin class
HBaseAdmin admin = new HBaseAdmin(conf);

import java.io.IOException;

import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.client.HBaseAdmin;

public class TableExists{

   public static void main(String args[])throws IOException{

      // Instantiating configuration class
      Configuration conf = HBaseConfiguration.create();

      // Instantiating HBaseAdmin class
      HBaseAdmin admin = new HBaseAdmin(conf);

      // Verifying the existance of the table
      boolean bool = admin.tableExists("emp");
      System.out.println( bool);
   }
}

$javac TableExists.java
$java TableExists

true

hbase(main):017:0> list
TABLE
raja
rajani
rajendra
rajesh
raju
9 row(s) in 0.0270 seconds

hbase(main):002:0> disable_all 'raj.*'
raja
rajani
rajendra
rajesh
raju
Disable the above 5 tables (y/n)?
y
5 tables successfully disabled

hbase(main):018:0> drop_all 'raj.*'
raja
rajani
rajendra
rajesh
raju
Drop the above 5 tables (y/n)?
y
5 tables successfully dropped

// creating a configuration object
Configuration conf = HBaseConfiguration.create();

// Creating HBaseAdmin object
HBaseAdmin admin = new HBaseAdmin(conf);

admin.disableTable("emp1");

admin.deleteTable("emp12");

import java.io.IOException;

import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.client.HBaseAdmin;

public class DeleteTable {

   public static void main(String[] args) throws IOException {

      // Instantiating configuration class
      Configuration conf = HBaseConfiguration.create();

      // Instantiating HBaseAdmin class
      HBaseAdmin admin = new HBaseAdmin(conf);

      // disabling table named emp
      admin.disableTable("emp12");

      // Deleting emp
      admin.deleteTable("emp12");
      System.out.println("Table deleted");
   }
}

$javac DeleteTable.java
$java DeleteTable

Table deleted

// Instantiating configuration object
Configuration conf = HBaseConfiguration.create();

// Instantiating HBaseAdmin object
HBaseAdmin admin = new HBaseAdmin(conf);

admin.shutdown();

import java.io.IOException;

import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.client.HBaseAdmin;

public class ShutDownHbase{

   public static void main(String args[])throws IOException {

      // Instantiating configuration class
      Configuration conf = HBaseConfiguration.create();

      // Instantiating HBaseAdmin class
      HBaseAdmin admin = new HBaseAdmin(conf);

      // Shutting down HBase
      System.out.println("Shutting down hbase");
      admin.shutdown();
   }
}

$javac ShutDownHbase.java
$java ShutDownHbase

Shutting down hbase

hbase(main):005:0> put 'emp','1','personal data:name','raju'
0 row(s) in 0.6600 seconds
hbase(main):006:0> put 'emp','1','personal data:city','hyderabad'
0 row(s) in 0.0410 seconds
hbase(main):007:0> put 'emp','1','professional
data:designation','manager'
0 row(s) in 0.0240 seconds
hbase(main):007:0> put 'emp','1','professional data:salary','50000'
0 row(s) in 0.0240 seconds

hbase(main):022:0> scan 'emp'

   ROW                        COLUMN+CELL
1 column=personal data:city, timestamp=1417524216501, value=hyderabad

1 column=personal data:name, timestamp=1417524185058, value=ramu

1 column=professional data:designation, timestamp=1417524232601,

 value=manager

1 column=professional data:salary, timestamp=1417524244109, value=50000

2 column=personal data:city, timestamp=1417524574905, value=chennai

2 column=personal data:name, timestamp=1417524556125, value=ravi

2 column=professional data:designation, timestamp=1417524592204,

 value=sr:engg

2 column=professional data:salary, timestamp=1417524604221, value=30000

3 column=personal data:city, timestamp=1417524681780, value=delhi

3 column=personal data:name, timestamp=1417524672067, value=rajesh

3 column=professional data:designation, timestamp=1417524693187,

value=jr:engg
3 column=professional data:salary, timestamp=1417524702514,

value=25000

Configuration conf = HbaseConfiguration.create();

HTable hTable = new HTable(conf, tableName);

Put p = new Put(Bytes.toBytes("row1"));

p.add(Bytes.toBytes("coloumn family "), Bytes.toBytes("column
name"),Bytes.toBytes("value"));

hTable.put(p);

hTable.close();

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.util.Bytes;

public class InsertData{

   public static void main(String[] args) throws IOException {

      // Instantiating Configuration class
      Configuration config = HBaseConfiguration.create();

      // Instantiating HTable class
      HTable hTable = new HTable(config, "emp");

      // Instantiating Put class
      // accepts a row name.
      Put p = new Put(Bytes.toBytes("row1"));

      // adding values using add() method
      // accepts column family name, qualifier/row name ,value
      p.add(Bytes.toBytes("personal"),
      Bytes.toBytes("name"),Bytes.toBytes("raju"));

      p.add(Bytes.toBytes("personal"),
      Bytes.toBytes("city"),Bytes.toBytes("hyderabad"));

      p.add(Bytes.toBytes("professional"),Bytes.toBytes("designation"),
      Bytes.toBytes("manager"));

      p.add(Bytes.toBytes("professional"),Bytes.toBytes("salary"),
      Bytes.toBytes("50000"));

      // Saving the put Instance to the HTable.
      hTable.put(p);
      System.out.println("data inserted");

      // closing HTable
      hTable.close();
   }
}

$javac InsertData.java
$java InsertData

data inserted

hbase(main):003:0> scan 'emp'
 ROW              COLUMN + CELL
row1 column = personal:name, timestamp = 1418051555, value = raju
row1 column = personal:city, timestamp = 1418275907, value = Hyderabad
row1 column = professional:designation, timestamp = 14180555,value = manager
row1 column = professional:salary, timestamp = 1418035791555,value = 50000
1 row(s) in 0.0100 seconds

hbase(main):002:0> put 'emp','row1','personal:city','Delhi'
0 row(s) in 0.0400 seconds

hbase(main):003:0> scan 'emp'
  ROW          COLUMN + CELL
row1 column = personal:name, timestamp = 1418035791555, value = raju
row1 column = personal:city, timestamp = 1418274645907, value = Delhi
row1 column = professional:designation, timestamp = 141857555,value = manager
row1 column = professional:salary, timestamp = 1418039555, value = 50000
1 row(s) in 0.0100 seconds

Configuration conf = HbaseConfiguration.create();

HTable hTable = new HTable(conf, tableName);

Put p = new Put(Bytes.toBytes("row1"));

p.add(Bytes.toBytes("coloumn family "), Bytes.toBytes("column
name"),Bytes.toBytes("value"));
p.add(Bytes.toBytes("personal"),
Bytes.toBytes("city"),Bytes.toBytes("Delih"));

hTable.put(p);

hTable.close();

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.util.Bytes;

public class UpdateData{

   public static void main(String[] args) throws IOException {

      // Instantiating Configuration class
      Configuration config = HBaseConfiguration.create();

      // Instantiating HTable class
      HTable hTable = new HTable(config, "emp");

      // Instantiating Put class
      //accepts a row name
      Put p = new Put(Bytes.toBytes("row1"));

      // Updating a cell value
      p.add(Bytes.toBytes("personal"),
      Bytes.toBytes("city"),Bytes.toBytes("Delih"));

      // Saving the put Instance to the HTable.
      hTable.put(p);
      System.out.println("data Updated");

      // closing HTable
      hTable.close();
   }
}

$javac UpdateData.java
$java UpdateData

data Updated

hbase(main):012:0> get 'emp', '1'

   COLUMN                     CELL

personal : city timestamp = 1417521848375, value = hyderabad

personal : name timestamp = 1417521785385, value = ramu

professional: designation timestamp = 1417521885277, value = manager

professional: salary timestamp = 1417521903862, value = 50000

4 row(s) in 0.0270 seconds

hbase(main):015:0> get 'emp', 'row1', {COLUMN ⇒ 'personal:name'}
  COLUMN                CELL
personal:name timestamp = 1418035791555, value = raju
1 row(s) in 0.0080 seconds

Configuration conf = HbaseConfiguration.create();

HTable hTable = new HTable(conf, tableName);

Get get = new Get(toBytes("row1"));

get.addFamily(personal)

get.addColumn(personal, name)

Result result = table.get(g);

byte [] value = result.getValue(Bytes.toBytes("personal"),Bytes.toBytes("name"));
byte [] value1 = result.getValue(Bytes.toBytes("personal"),Bytes.toBytes("city"));

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.util.Bytes;

public class RetriveData{

   public static void main(String[] args) throws IOException, Exception{

      // Instantiating Configuration class
      Configuration config = HBaseConfiguration.create();

      // Instantiating HTable class
      HTable table = new HTable(config, "emp");

      // Instantiating Get class
      Get g = new Get(Bytes.toBytes("row1"));

      // Reading the data
      Result result = table.get(g);

      // Reading values from Result class object
      byte [] value = result.getValue(Bytes.toBytes("personal"),Bytes.toBytes("name"));

      byte [] value1 = result.getValue(Bytes.toBytes("personal"),Bytes.toBytes("city"));

      // Printing the values
      String name = Bytes.toString(value);
      String city = Bytes.toString(value1);

      System.out.println("name: " + name + " city: " + city);
   }
}

$javac RetriveData.java
$java RetriveData

name: Raju city: Delhi

hbase(main):006:0> delete 'emp', '1', 'personal data:city',
1417521848375
0 row(s) in 0.0060 seconds

hbase(main):007:0> deleteall 'emp','1'
0 row(s) in 0.0240 seconds

hbase(main):022:0> scan 'emp'

ROW                  COLUMN + CELL

2 column = personal data:city, timestamp = 1417524574905, value = chennai

2 column = personal data:name, timestamp = 1417524556125, value = ravi

2 column = professional data:designation, timestamp = 1417524204, value = sr:engg

2 column = professional data:salary, timestamp = 1417524604221, value = 30000

3 column = personal data:city, timestamp = 1417524681780, value = delhi

3 column = personal data:name, timestamp = 1417524672067, value = rajesh

3 column = professional data:designation, timestamp = 1417523187, value = jr:engg

3 column = professional data:salary, timestamp = 1417524702514, value = 25000

Configuration conf = HbaseConfiguration.create();

HTable hTable = new HTable(conf, tableName);

Delete delete = new Delete(toBytes("row1"));

delete.deleteColumn(Bytes.toBytes("personal"), Bytes.toBytes("name"));
delete.deleteFamily(Bytes.toBytes("professional"));

table.delete(delete);

table.close();

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.util.Bytes;

public class DeleteData {

   public static void main(String[] args) throws IOException {

      // Instantiating Configuration class
      Configuration conf = HBaseConfiguration.create();

      // Instantiating HTable class
      HTable table = new HTable(conf, "employee");

      // Instantiating Delete class
      Delete delete = new Delete(Bytes.toBytes("row1"));
      delete.deleteColumn(Bytes.toBytes("personal"), Bytes.toBytes("name"));
      delete.deleteFamily(Bytes.toBytes("professional"));

      // deleting the data
      table.delete(delete);

      // closing the HTable object
      table.close();
      System.out.println("data deleted.....");
   }
}

$javac Deletedata.java
$java DeleteData

data deleted

hbase(main):010:0> scan 'emp'

ROW                           COLUMN + CELL

1 column = personal data:city, timestamp = 1417521848375, value = hyderabad

1 column = personal data:name, timestamp = 1417521785385, value = ramu

1 column = professional data:designation, timestamp = 1417585277,value = manager

1 column = professional data:salary, timestamp = 1417521903862, value = 50000

1 row(s) in 0.0370 seconds

hbase(main):011:0> truncate 'emp'
Truncating 'one' table (it may take a while):
   - Disabling table...
   - Truncating table...
   0 row(s) in 1.5950 seconds

hbase(main):017:0> scan ‘emp’
ROW                  COLUMN + CELL
0 row(s) in 0.3110 seconds