Uploaded image for project: 'Hadoop HDFS'
  1. Hadoop HDFS
  2. HDFS-12555

HDFS federation should support configure secondary directory

    XMLWordPrintableJSON

    Details

    • Type: Improvement
    • Status: Patch Available
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: 3.0.0
    • Component/s: federation
    • Labels:
      None
    • Environment:

      2.6.0-cdh5.10.0

    • Target Version/s:
    • Hadoop Flags:
      Reviewed

      Description

      HDFS federation support multiple namenodes horizontally scales the file system namespace. As the amount of data grows, using a single group of namenodes to manage a single directory, namenode still achieves performance bottlenecks. In order to reduce the pressure of namenode, we can split out the secondary directory, and manager it by a new namenode. This is transparent for users.
      For example, nn1 only manager the /user directory, when nn1 achieve performance bottlenecks, we can split out /user/hive directory, and ues nn2 to manager it.
      That means core-site.xml should support as follows configuration.

      <property>
      <name>fs.viewfs.mounttable.nsX.link./user</name>
      <value>hdfs://nn1:8020/user</value>
      </property>

      <property>
      <name>fs.viewfs.mounttable.nsX.link./user/hive</name>
      <value>hdfs://nn2:8020/user/hive</value>
      </property>

        Attachments

        1. HDFS-12555.004.patch
          14 kB
          luoge123
        2. HDFS-12555.003.patch
          14 kB
          luoge123
        3. HDFS-12555.002.patch
          13 kB
          luoge123
        4. HDFS-12555.001.patch
          8 kB
          luoge123

          Activity

            People

            • Assignee:
              luoge123 luoge123
              Reporter:
              luoge123 luoge123
            • Votes:
              0 Vote for this issue
              Watchers:
              6 Start watching this issue

              Dates

              • Created:
                Updated: