Hi,
I haven't seen there is a limitation for training dataset size. May I know how you do the pipeline? If you are using Azure Machine Learning Designer, could you please try the enterprise version? https://learn.microsoft.com/en-us/azure/machine-learning/concept-ml-pipelines#building-pipelines-with-the-designer
Also, I have attached a tutorial here for large data pipeline: https://learn.microsoft.com/en-us/azure/machine-learning/tutorial-pipeline-batch-scoring-classification
Please let me know more details (like the error message )about your issue if above not solved your problem.
Regards,
Yutong