<constraints>

  <hardware>

    <disk>

      <size unit="G">6</size>

    </disk>

  </hardware>

  <overwrite>

    <conditions>

      <arch>ppc</arch>

      <arch>ppc64</arch>

      <arch>ppc64le</arch>

    </conditions>

    <hardware>

      <physicalmemory>

        <size unit="G">4</size>

      </physicalmemory>

    </hardware>

  </overwrite>

</constraints>

​