default String getErasureCodingPolicy() {
    return null;
  }
The HDFS erasure coding policy for a table. This will be set on the data dir of the table, and
is an alternative to normal replication which takes less space at the cost of locality.
@return the current policy, or null if undefined
hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableDescriptor.java