hadoop - Multiple datanode configuration in Pseudo-distributed mode










0















I am newbie in hadoop. I have setup hadoop - Pseudo-distributed mode in single machine. My hdfs-site.xml configuration as default:



<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.namenode.name.dir</name>
<value>file:/usr/local/hadoop/yarn_data/hdfs/namenode</value>
</property>
<property>
<name>dfs.datanode.data.dir</name>
<value>file:/usr/local/hadoop/yarn_data/hdfs/datanode</value>
</property>




After run:




hdfs namenode -format

start-all.sh

jps




I have one namenode and one datanode.

I want to have multiple datanode on this machine and I try to config at this advice: stackoverflow and my config:



<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.namenode.name.dir</name>
<value>file:/usr/local/hadoop/yarn_data/hdfs/namenode</value>
</property>
<property>
<name>dfs.datanode.data.dir</name>
<value>file:/usr/local/hadoop/yarn_data/hdfs/datanode-1</value>
<name>dfs.datanode.address</name>
<value>0.0.0.0:9870</value>
<name>dfs.datanode.http.address</name>
<value>0.0.0.0:9090</value>
</property>
<property>
<name>dfs.datanode.data.dir</name>
<value>file:/usr/local/hadoop/yarn_data/hdfs/datanode-2</value>
<name>dfs.datanode.address</name>
<value>0.0.0.0:9871</value>
<name>dfs.datanode.http.address</name>
<value>0.0.0.0:9091</value>
</property>




And I gain zero datanode. Any help would be greatly appreciated.










share|improve this question




























    0















    I am newbie in hadoop. I have setup hadoop - Pseudo-distributed mode in single machine. My hdfs-site.xml configuration as default:



    <configuration>
    <property>
    <name>dfs.replication</name>
    <value>1</value>
    </property>
    <property>
    <name>dfs.namenode.name.dir</name>
    <value>file:/usr/local/hadoop/yarn_data/hdfs/namenode</value>
    </property>
    <property>
    <name>dfs.datanode.data.dir</name>
    <value>file:/usr/local/hadoop/yarn_data/hdfs/datanode</value>
    </property>




    After run:




    hdfs namenode -format

    start-all.sh

    jps




    I have one namenode and one datanode.

    I want to have multiple datanode on this machine and I try to config at this advice: stackoverflow and my config:



    <configuration>
    <property>
    <name>dfs.replication</name>
    <value>1</value>
    </property>
    <property>
    <name>dfs.namenode.name.dir</name>
    <value>file:/usr/local/hadoop/yarn_data/hdfs/namenode</value>
    </property>
    <property>
    <name>dfs.datanode.data.dir</name>
    <value>file:/usr/local/hadoop/yarn_data/hdfs/datanode-1</value>
    <name>dfs.datanode.address</name>
    <value>0.0.0.0:9870</value>
    <name>dfs.datanode.http.address</name>
    <value>0.0.0.0:9090</value>
    </property>
    <property>
    <name>dfs.datanode.data.dir</name>
    <value>file:/usr/local/hadoop/yarn_data/hdfs/datanode-2</value>
    <name>dfs.datanode.address</name>
    <value>0.0.0.0:9871</value>
    <name>dfs.datanode.http.address</name>
    <value>0.0.0.0:9091</value>
    </property>




    And I gain zero datanode. Any help would be greatly appreciated.










    share|improve this question


























      0












      0








      0








      I am newbie in hadoop. I have setup hadoop - Pseudo-distributed mode in single machine. My hdfs-site.xml configuration as default:



      <configuration>
      <property>
      <name>dfs.replication</name>
      <value>1</value>
      </property>
      <property>
      <name>dfs.namenode.name.dir</name>
      <value>file:/usr/local/hadoop/yarn_data/hdfs/namenode</value>
      </property>
      <property>
      <name>dfs.datanode.data.dir</name>
      <value>file:/usr/local/hadoop/yarn_data/hdfs/datanode</value>
      </property>




      After run:




      hdfs namenode -format

      start-all.sh

      jps




      I have one namenode and one datanode.

      I want to have multiple datanode on this machine and I try to config at this advice: stackoverflow and my config:



      <configuration>
      <property>
      <name>dfs.replication</name>
      <value>1</value>
      </property>
      <property>
      <name>dfs.namenode.name.dir</name>
      <value>file:/usr/local/hadoop/yarn_data/hdfs/namenode</value>
      </property>
      <property>
      <name>dfs.datanode.data.dir</name>
      <value>file:/usr/local/hadoop/yarn_data/hdfs/datanode-1</value>
      <name>dfs.datanode.address</name>
      <value>0.0.0.0:9870</value>
      <name>dfs.datanode.http.address</name>
      <value>0.0.0.0:9090</value>
      </property>
      <property>
      <name>dfs.datanode.data.dir</name>
      <value>file:/usr/local/hadoop/yarn_data/hdfs/datanode-2</value>
      <name>dfs.datanode.address</name>
      <value>0.0.0.0:9871</value>
      <name>dfs.datanode.http.address</name>
      <value>0.0.0.0:9091</value>
      </property>




      And I gain zero datanode. Any help would be greatly appreciated.










      share|improve this question
















      I am newbie in hadoop. I have setup hadoop - Pseudo-distributed mode in single machine. My hdfs-site.xml configuration as default:



      <configuration>
      <property>
      <name>dfs.replication</name>
      <value>1</value>
      </property>
      <property>
      <name>dfs.namenode.name.dir</name>
      <value>file:/usr/local/hadoop/yarn_data/hdfs/namenode</value>
      </property>
      <property>
      <name>dfs.datanode.data.dir</name>
      <value>file:/usr/local/hadoop/yarn_data/hdfs/datanode</value>
      </property>




      After run:




      hdfs namenode -format

      start-all.sh

      jps




      I have one namenode and one datanode.

      I want to have multiple datanode on this machine and I try to config at this advice: stackoverflow and my config:



      <configuration>
      <property>
      <name>dfs.replication</name>
      <value>1</value>
      </property>
      <property>
      <name>dfs.namenode.name.dir</name>
      <value>file:/usr/local/hadoop/yarn_data/hdfs/namenode</value>
      </property>
      <property>
      <name>dfs.datanode.data.dir</name>
      <value>file:/usr/local/hadoop/yarn_data/hdfs/datanode-1</value>
      <name>dfs.datanode.address</name>
      <value>0.0.0.0:9870</value>
      <name>dfs.datanode.http.address</name>
      <value>0.0.0.0:9090</value>
      </property>
      <property>
      <name>dfs.datanode.data.dir</name>
      <value>file:/usr/local/hadoop/yarn_data/hdfs/datanode-2</value>
      <name>dfs.datanode.address</name>
      <value>0.0.0.0:9871</value>
      <name>dfs.datanode.http.address</name>
      <value>0.0.0.0:9091</value>
      </property>




      And I gain zero datanode. Any help would be greatly appreciated.







      hadoop datanode






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 14 '18 at 4:18









      cricket_007

      81.5k1142111




      81.5k1142111










      asked Nov 14 '18 at 4:14









      Huy TruongHuy Truong

      83




      83






















          1 Answer
          1






          active

          oldest

          votes


















          0














          Key part of that linked answer is you got to maintain different configurations for each datanode instance



          You cannot put two <name> and <value> sections as part of the same XML file



          You are required to have two separate config files, one for each datanode.

          However, I
          m not completely sure it is possible to have two HADOOP_CONF_DIR variables for unique Hadoop processes. There might be a way to do hadoop --config /some/path datanode, but start-dfs is just hiding that way to run a datanode away from you



          That being said, assuming you have export HADOOP_CONF_DIR=/etc/hadoop and ls $HADOOP_CONF_DIR/hdfs-site.xml is working, then you can try the following in its own terminal



          mkdir /etc/hadoop2
          cp /etc/hadoop/* /etc/hadoop2/

          # EDIT the new hdfs-site.xml file

          hadoop --config /etc/hadoop2 datanode


          I would recommend just using two separate virtual machines, because that'll more closely match a real-world scenario






          share|improve this answer

























          • Hi @cricket_007, can you give me more detail or any tutorial?

            – Huy Truong
            Nov 14 '18 at 4:23











          • What are you planning to gain from running more than one datanode? You are on a single machine already, so replication doesnt do anything

            – cricket_007
            Nov 14 '18 at 4:27











          • Yes but I want to test distributed feature, datanode behavior and how namenode store its metadata, fsimage ...

            – Huy Truong
            Nov 14 '18 at 4:32











          • Nothing is "distributed" until you cross over a non-local network interface. And the FSImage still works with one datanode

            – cricket_007
            Nov 14 '18 at 4:33












          • How about this tutor: (bigdata.wordpress.com/2010/05/27/…)

            – Huy Truong
            Nov 14 '18 at 4:40










          Your Answer






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          1 Answer
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          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          0














          Key part of that linked answer is you got to maintain different configurations for each datanode instance



          You cannot put two <name> and <value> sections as part of the same XML file



          You are required to have two separate config files, one for each datanode.

          However, I
          m not completely sure it is possible to have two HADOOP_CONF_DIR variables for unique Hadoop processes. There might be a way to do hadoop --config /some/path datanode, but start-dfs is just hiding that way to run a datanode away from you



          That being said, assuming you have export HADOOP_CONF_DIR=/etc/hadoop and ls $HADOOP_CONF_DIR/hdfs-site.xml is working, then you can try the following in its own terminal



          mkdir /etc/hadoop2
          cp /etc/hadoop/* /etc/hadoop2/

          # EDIT the new hdfs-site.xml file

          hadoop --config /etc/hadoop2 datanode


          I would recommend just using two separate virtual machines, because that'll more closely match a real-world scenario






          share|improve this answer

























          • Hi @cricket_007, can you give me more detail or any tutorial?

            – Huy Truong
            Nov 14 '18 at 4:23











          • What are you planning to gain from running more than one datanode? You are on a single machine already, so replication doesnt do anything

            – cricket_007
            Nov 14 '18 at 4:27











          • Yes but I want to test distributed feature, datanode behavior and how namenode store its metadata, fsimage ...

            – Huy Truong
            Nov 14 '18 at 4:32











          • Nothing is "distributed" until you cross over a non-local network interface. And the FSImage still works with one datanode

            – cricket_007
            Nov 14 '18 at 4:33












          • How about this tutor: (bigdata.wordpress.com/2010/05/27/…)

            – Huy Truong
            Nov 14 '18 at 4:40















          0














          Key part of that linked answer is you got to maintain different configurations for each datanode instance



          You cannot put two <name> and <value> sections as part of the same XML file



          You are required to have two separate config files, one for each datanode.

          However, I
          m not completely sure it is possible to have two HADOOP_CONF_DIR variables for unique Hadoop processes. There might be a way to do hadoop --config /some/path datanode, but start-dfs is just hiding that way to run a datanode away from you



          That being said, assuming you have export HADOOP_CONF_DIR=/etc/hadoop and ls $HADOOP_CONF_DIR/hdfs-site.xml is working, then you can try the following in its own terminal



          mkdir /etc/hadoop2
          cp /etc/hadoop/* /etc/hadoop2/

          # EDIT the new hdfs-site.xml file

          hadoop --config /etc/hadoop2 datanode


          I would recommend just using two separate virtual machines, because that'll more closely match a real-world scenario






          share|improve this answer

























          • Hi @cricket_007, can you give me more detail or any tutorial?

            – Huy Truong
            Nov 14 '18 at 4:23











          • What are you planning to gain from running more than one datanode? You are on a single machine already, so replication doesnt do anything

            – cricket_007
            Nov 14 '18 at 4:27











          • Yes but I want to test distributed feature, datanode behavior and how namenode store its metadata, fsimage ...

            – Huy Truong
            Nov 14 '18 at 4:32











          • Nothing is "distributed" until you cross over a non-local network interface. And the FSImage still works with one datanode

            – cricket_007
            Nov 14 '18 at 4:33












          • How about this tutor: (bigdata.wordpress.com/2010/05/27/…)

            – Huy Truong
            Nov 14 '18 at 4:40













          0












          0








          0







          Key part of that linked answer is you got to maintain different configurations for each datanode instance



          You cannot put two <name> and <value> sections as part of the same XML file



          You are required to have two separate config files, one for each datanode.

          However, I
          m not completely sure it is possible to have two HADOOP_CONF_DIR variables for unique Hadoop processes. There might be a way to do hadoop --config /some/path datanode, but start-dfs is just hiding that way to run a datanode away from you



          That being said, assuming you have export HADOOP_CONF_DIR=/etc/hadoop and ls $HADOOP_CONF_DIR/hdfs-site.xml is working, then you can try the following in its own terminal



          mkdir /etc/hadoop2
          cp /etc/hadoop/* /etc/hadoop2/

          # EDIT the new hdfs-site.xml file

          hadoop --config /etc/hadoop2 datanode


          I would recommend just using two separate virtual machines, because that'll more closely match a real-world scenario






          share|improve this answer















          Key part of that linked answer is you got to maintain different configurations for each datanode instance



          You cannot put two <name> and <value> sections as part of the same XML file



          You are required to have two separate config files, one for each datanode.

          However, I
          m not completely sure it is possible to have two HADOOP_CONF_DIR variables for unique Hadoop processes. There might be a way to do hadoop --config /some/path datanode, but start-dfs is just hiding that way to run a datanode away from you



          That being said, assuming you have export HADOOP_CONF_DIR=/etc/hadoop and ls $HADOOP_CONF_DIR/hdfs-site.xml is working, then you can try the following in its own terminal



          mkdir /etc/hadoop2
          cp /etc/hadoop/* /etc/hadoop2/

          # EDIT the new hdfs-site.xml file

          hadoop --config /etc/hadoop2 datanode


          I would recommend just using two separate virtual machines, because that'll more closely match a real-world scenario







          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Nov 14 '18 at 5:37

























          answered Nov 14 '18 at 4:18









          cricket_007cricket_007

          81.5k1142111




          81.5k1142111












          • Hi @cricket_007, can you give me more detail or any tutorial?

            – Huy Truong
            Nov 14 '18 at 4:23











          • What are you planning to gain from running more than one datanode? You are on a single machine already, so replication doesnt do anything

            – cricket_007
            Nov 14 '18 at 4:27











          • Yes but I want to test distributed feature, datanode behavior and how namenode store its metadata, fsimage ...

            – Huy Truong
            Nov 14 '18 at 4:32











          • Nothing is "distributed" until you cross over a non-local network interface. And the FSImage still works with one datanode

            – cricket_007
            Nov 14 '18 at 4:33












          • How about this tutor: (bigdata.wordpress.com/2010/05/27/…)

            – Huy Truong
            Nov 14 '18 at 4:40

















          • Hi @cricket_007, can you give me more detail or any tutorial?

            – Huy Truong
            Nov 14 '18 at 4:23











          • What are you planning to gain from running more than one datanode? You are on a single machine already, so replication doesnt do anything

            – cricket_007
            Nov 14 '18 at 4:27











          • Yes but I want to test distributed feature, datanode behavior and how namenode store its metadata, fsimage ...

            – Huy Truong
            Nov 14 '18 at 4:32











          • Nothing is "distributed" until you cross over a non-local network interface. And the FSImage still works with one datanode

            – cricket_007
            Nov 14 '18 at 4:33












          • How about this tutor: (bigdata.wordpress.com/2010/05/27/…)

            – Huy Truong
            Nov 14 '18 at 4:40
















          Hi @cricket_007, can you give me more detail or any tutorial?

          – Huy Truong
          Nov 14 '18 at 4:23





          Hi @cricket_007, can you give me more detail or any tutorial?

          – Huy Truong
          Nov 14 '18 at 4:23













          What are you planning to gain from running more than one datanode? You are on a single machine already, so replication doesnt do anything

          – cricket_007
          Nov 14 '18 at 4:27





          What are you planning to gain from running more than one datanode? You are on a single machine already, so replication doesnt do anything

          – cricket_007
          Nov 14 '18 at 4:27













          Yes but I want to test distributed feature, datanode behavior and how namenode store its metadata, fsimage ...

          – Huy Truong
          Nov 14 '18 at 4:32





          Yes but I want to test distributed feature, datanode behavior and how namenode store its metadata, fsimage ...

          – Huy Truong
          Nov 14 '18 at 4:32













          Nothing is "distributed" until you cross over a non-local network interface. And the FSImage still works with one datanode

          – cricket_007
          Nov 14 '18 at 4:33






          Nothing is "distributed" until you cross over a non-local network interface. And the FSImage still works with one datanode

          – cricket_007
          Nov 14 '18 at 4:33














          How about this tutor: (bigdata.wordpress.com/2010/05/27/…)

          – Huy Truong
          Nov 14 '18 at 4:40





          How about this tutor: (bigdata.wordpress.com/2010/05/27/…)

          – Huy Truong
          Nov 14 '18 at 4:40

















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