HDK

This section describes usage related documents for the HDK-based engine of Modin.

This engine uses the HDK library to obtain high single-node scalability for specific set of dataframe operations. To enable this engine you can set the following environment variable:

export MODIN_STORAGE_FORMAT=hdk

or use it in your code:

import modin.config as cfg
cfg.StorageFormat.put('hdk')

Since HDK is run through its native engine, Modin automatically sets MODIN_ENGINE=Native and you might not specify it explicitly. If for some reasons Native engine is explicitly set using modin.config or MODIN_ENGINE environment variable, make sure you also tell Modin that Experimental mode is turned on (export MODIN_EXPERIMENTAL=true or cfg.IsExperimental.put(True)) otherwise the following error occurs:

FactoryNotFoundError: HDK on Native is only accessible through the experimental API.
Run `import modin.experimental.pandas as pd` to use HDK on Native.

Note

If you encounter LLVM ERROR: inconsistency in registered CommandLine options error when using HDK, please refer to the respective section in Troubleshooting page to avoid the issue.