core-xml

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!-- Put site-specific property overrides in this file. -->
<configuration>

  <!-- General Security Settings -->
  <!--
  <property>
    <name>hadoop.security.authentication</name>
    <value>kerberos</value>
  </property>

  <property>
    <name>hadoop.security.authorization</name>
    <value>true</value>
  </property>

  <property>
    <name>dfs.permissions</name>
    <value>true</value>
  </property>
  -->

  <!-- Hadoop Web Console Authentication settings
    The value of the hadoop.http.authentication.kerberos.principal property
    must use a principal name such as HTTP/host@REALM as required by the
    SPNEGO specification (RFC-4559 4.1)
  -->
  <!--
  <property>
    <name>hadoop.http.filter.initializers</name>
    <value>org.apache.hadoop.security.AuthenticationFilterInitializer</value>
  </property>

  <property>
    <name>hadoop.http.authentication.type</name>
    <value>kerberos</value>
  </property>

  <property>
    <name>hadoop.http.authentication.token.validity</name>
    <value>36000</value>
  </property>

  <property>
    <name>hadoop.http.authentication.signature.secret</name>
    <value>hadoop</value>
  </property>

  <property>
    <name>hadoop.http.authentication.cookie.domain</name>
    <value>.example.com</value>
  </property>

  <property>
    <name>hadoop.http.authentication.simple.anonymous.allowed</name>
    <value>false</value>
  </property>

  <property>
    <name>hadoop.http.authentication.kerberos.principal</name>
    <value>HTTP/_HOST@REALM</value>
  </property>

  <property>
    <name>hadoop.http.authentication.kerberos.keytab</name>
    <value>/path/to/dse.keytab</value>
  </property>
  -->

  <!-- General CFS/DFS settings -->
  <property>
    <name>io.seqfile.compress.blocksize</name>
    <value>1048576</value>
    <description>
      The minimum block size for compression in block compressed
      SequenceFiles.
    </description>
  </property>

  <!-- 64 MB default -->
  <property>
    <name>fs.local.block.size</name>
    <value>67108864</value>
  </property>

  <!-- 2 MB SubBlock Size -->
  <property>
    <name>fs.local.subblock.size</name>
    <value>2097152</value>
  </property>

  <!--
    Uncomment these properties to override default consistency levels used by CFS.
    Default read and write consistency levels
    are QUORUM for SimpleStrategy and LOCAL_QUORUM for NetworkTopologyStrategy.

    If read CL is set to QUORUM, CFS will internally
    try to read blocks at ONE for performance reasons, before attempting QUORUM.
    This is safe to do so, because blocks in CFS are immutable.
  -->
  <!--
  <property>
    <name>dse.consistencylevel.read</name>
    <value>QUORUM</value>
  </property>

  <property>
    <name>dse.consistencylevel.write</name>
    <value>QUORUM</value>
  </property>
  -->

  <!-- CFS Repair batch size -->
  <property>
    <name>dse.cfs.repair.batchsize</name>
    <value>300</value>
  </property>

  <!-- real world cluster configuration  checket http://hadoop.apache.org/docs/r1.0.3/cluster_setup.html-->
  <!--
  // Larger amount of memory allocated for the in-memory file-system used to merge map-outputs at
  // the reduces.
  <property>
    <name>fs.inmemory.size.mb</name>
    <value>200</value>
  </property>

  // More streams merged at once while sorting files.
  <property>
    <name>io.sort.factor</name>
    <value>100</value>
  </property>

  // Higher memory-limit while sorting data.
  <property>
    <name>io.sort.mb</name>
    <value>200</value>
  </property>
  -->
</configuration>
bash-4.1$