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# H2O Driverless AI MOJO Reader

KNIME H2O Driverless AI Integration version 1.0.0.v202011111327 by KNIME AG

Reads and imports H2O Driverless AI MOJOs (Model Object, Optimized) that are output of an H2O Driverless AI experiment. Usually, the MOJO file is named pipeline.mojo and located in the downloaded mojo-pipeline folder.

Note that a valid Driverless AI license is required in order to execute this node. The license file can either be set in the preferences or by setting the proper environment variable or system property (system properties can be set in the knime.ini file in the root directory of the KNIME installation). See the license specification section in this guide for details.

## Options

Select a file system which stores the Driverless AI MOJO you want to read. There are four default file system options to choose from:
• Local File System: Allows you to select a file from your local system.
• Mountpoint: Allows you to read from a mountpoint. When selected, a new drop-down menu appears to choose the mountpoint. Unconnected mountpoints are greyed out but can still be selected (note that browsing is disabled in this case). Go to the KNIME Explorer and connect to the mountpoint to enable browsing. A mountpoint is displayed in red if it was previously selected but no longer available. You won't be able to close save the dialog as long as you don't select a valid i.e. known mountpoint.
• Relative to: Allows you to choose whether to resolve the path relative to the workflow or mountpoint. When selected a new drop-down menu appears to choose which of the two options to use.
• Custom/KNIME URL: Allows to specify a URL (e.g. file://, http:// or knime:// protocol). When selected, a spinner appears that allows you to specify the desired connection and read timeout in milliseconds. In case it takes longer to connect to the host / read the file, the node fails to execute. Browsing is disabled for this option.
It is possible to use other file systems with this node. Therefore, you have to enable the file system connection input port of this node by clicking the ... in the bottom left corner of the node's icon and choose Add File System Connection port .
Afterwards, you can simply connect the desired connector node to this node. The file system connection will then be shown in the drop-down menu. It is greyed out if the file system is not connected in which case you have to (re)execute the connector node first. Note: The default file systems listed above can't be selected if a file system is provided via the input port.
File/URL
Enter a URL when reading from Custom/KNIME URL, otherwise enter a path to a file. The required syntax of a path depends on the chosen file system, such as "C:\path\to\file" (Local File System on Windows) or "/path/to/file" (Local File System on Linux/MacOS and Mountpoint). For file systems connected via input port, the node description of the respective connector node describes the required path format. You can also choose a previously selected file from the drop-down list, or select a location from the "Browse..." dialog. Note that browsing is disabled in some cases:
• Custom/KNIME URL: Browsing is always disabled.
• Mountpoint: Browsing is disabled if the selected mountpoint isn't connected. Go to the KNIME Explorer and connect to the mountpoint to enable browsing.
• File systems provided via input port: Browsing is disabled if the connector node hasn't been executed since the workflow has been opened. (Re)execute the connector node to enable browsing.

## Installation

To use this node in KNIME, install KNIME H2O Driverless AI Integration from the following update site: