> 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/pdia-data-integration/10.2-data-integration/pdi-transformation-steps-reference-overview/hbase-output/options-hbase-output-reuse/configure-connection-tab-hbase-output-reuse.md).

# Configure connection tab

This tab contains HBase connection information. You can configure a connection in one of two ways:

* Using the Hadoop cluster properties, or
* By using an `hbase-site.xml` and (an optional) `hbase-default.xml` configuration file.

Below the connection details are fields to specify which target HBase table to write to, along with a mapping by which to encode incoming field values.

![Configure connection tab](/files/UcV9WgSmF4DZqCgqnmFg)

This tab includes the following fields:

| Option                              | Definition                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| ----------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Hadoop cluster**                  | <p>Click the <strong>Hadoop Cluster</strong> drop-down menu to select an existing Hadoop cluster configuration.</p><ul><li>Click to <strong>Edit</strong> an existing Hadoop cluster configuration. Refer to <a href="/pages/pAzzVzwCU5XRZ9ANZ1SU">Connecting to a Hadoop cluster with the PDI client</a> for information on editing a Hadoop cluster.</li><li>Click <strong>New</strong> to add a new Hadoop cluster configuration. Refer to <a href="/pages/pAzzVzwCU5XRZ9ANZ1SU">Connecting to a Hadoop cluster with the PDI client</a> for information on creating a Hadoop cluster.</li></ul> |
| **URL to hbase-site.xml**           | Address of the `hbase-site.xml` file.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| **URL to hbase-default.xml**        | Address of the `hbase-default.xml` file.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| **HBase table name**                | The target HBase table you want to write data into.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| **Get table names** (button)        | Click to populate the drop-down list of available table names in the **Hbase table name** field. Only table names that have been mapped are retrieved. If you enter the namespace and colon in the **HBase table name** field, and then click **Get table names**, only the table names in that namespace display. The table names display the namespace, followed by a colon, then the table name. See [Namespaces](/pdia-data-integration/10.2-data-integration/pdi-transformation-steps-reference-overview/hbase-input-cp-main-page/namespaces.md).                                             |
| **Mapping name**                    | A mapping to decode and interpret column values. Click **Get mappings for the specified table** to populate the drop-down list of available mappings.                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| **Store mapping info in step meta** | Specifies whether to store mapping information in the step's metadata instead of loading it from HBase when it runs.                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| **Delete rows by mapping key**      | Select to instruct HBase to delete rows using the row key on the mapped input field.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| **Disable write to WAL**            | <p>Disables writing to the Write Ahead Log (WAL).</p><p>The WAL is used as a failsafe to restore the status quo if the server goes down while data is being inserted. Disabling WAL will increase performance.</p><p>Not available when <strong>Delete rows by mapping</strong> is selected.</p>                                                                                                                                                                                                                                                                                                   |
| **Size of write buffer (bytes)**    | <p>The size of the write buffer used to transfer data to HBase.</p><p>A larger buffer consumes more memory (on both the client and server), but results in fewer remote procedure calls.</p><p>If you leave this field empty, the default value (specified in the<code>hbase-default.xml</code> file) is 2MB (2097152 bytes).</p>                                                                                                                                                                                                                                                                  |


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