hadoop/hadoop-hdfs-project/hadoop-hdfs/src/main/conf/user_ec_policies.xml.template

<?xml version="1.0"?>

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<!--
    This is the template for user-defined EC policies configuration.
    All policies and schemas are defined within the 'configuration' tag
    which is the top level element for this XML document. The 'layoutversion'
    tag contains the version of EC policy XML file format, and user-defined EC
    schemas are included within the 'schemas' tag. The 'policies' tag
    contains all the user defined EC policies, and each policy consists of
    schema id and cellsize.
-->
<configuration>
<!-- The version of EC policy XML file format, it must be an integer -->
<layoutversion>1</layoutversion>
<schemas>
  <!-- schema id is only used to reference internally in this document -->
  <schema id="XORk2m1">
    <!-- The combination of codec, k, m and options as the schema ID, defines
     a unique schema, for example 'xor-2-1'. schema ID is case insensitive -->
    <!-- codec with this specific name should exist already in this system -->
    <codec>xor</codec>
    <k>2</k>
    <m>1</m>
    <options> </options>
  </schema>
  <schema id="RSk12m4">
    <codec>RS</codec>
    <k>12</k>
    <m>4</m>
    <options> </options>
  </schema>
  <schema id="RS-legacyk12m4">
    <codec>RS-legacy</codec>
    <k>12</k>
    <m>4</m>
    <options> </options>
  </schema>
</schemas>
<policies>
  <policy>
    <!-- the combination of schema ID and cellsize(in unit k) defines a unique
     policy, for example 'xor-2-1-256k', case insensitive -->
    <!-- schema is referred by its id -->
    <schema>XORk2m1</schema>
    <!-- cellsize must be an positive integer multiple of 1024(1k) -->
    <!-- maximum cellsize is defined by 'dfs.namenode.ec.policies.max.cellsize' property -->
    <cellsize>131072</cellsize>
  </policy>
  <policy>
    <schema>RS-legacyk12m4</schema>
    <cellsize>262144</cellsize>
  </policy>
</policies>
</configuration>