> For the complete documentation index, see [llms.txt](https://docs.pentaho.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pentaho.com/pdc-10.2-data-optimizer/pdso-install-landing-page/pdso-install-in-hadoop-cluster/pdso-install-landing-page-hadoop-installation/installing-data-storage-optimizer-on-cloudera-manager-cluster-cp/download-the-pentaho-data-storage-optimizer-software.md).

# Download the Pentaho Data Optimizer software

Follow the steps below to download the Data Optimizer install files and verify the integrity of the files. This task assumes you know how to calculate an MD5 checksum.

1. Download both the `TAR` file containing the custom service descriptor (CSD) file and the parcel for Pentaho Data Optimizer from the [Support Portal](https://support.pentaho.com/hc/en-us). The file is named `pdso-1.3.x.x-el7.tar`.
2. Verify the downloaded content.
   1. Calculate the MD5 checksum of the downloaded file.
   2. Compare it to the MD5 checksum provided on the software download page.
   3. Ensure the two values match.
3. Extract the contents of the `pdso-1.3.x.x-el7.tar` file to a directory.

The contents of the directory are extracted.

| File name                    | Description                                                                |
| ---------------------------- | -------------------------------------------------------------------------- |
| `pdso-1.3.x.x-el7.parcel`    | The Pentaho Data Optimizer parcel.                                         |
| `pdso-1.3.x.xel7.parcel.sha` | A SHA-1 checksum of the parcel file, used for the local parcel repository. |
| `manifest.json`              | A manifest for the hosted parcel repository.                               |
| `pdso-1.3.x.x-el7.jar`       | The file containing the custom service descriptor.                         |


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