In ADF Dataflow Preview i am not able to see the preview properly how to set this can anyone help

Makrand Waghmare 5

This preview is not good i can't do manually for 100 of tables is their any way for getting better preview on this?

Sina Salam 16,446 Reputation points

2025-01-23T19:44:00.9533333+00:00
Hello Makrand Waghmare,

Welcome to the Microsoft Q&A and thank you for posting your questions here.

I understand that you're unable to see the ADF Dataflow preview properly and need how to set it.

Dealing with preview issues in Azure Data Factory (ADF) Dataflow can be challenging, especially when working with a large number of tables. Here are some effective strategies to enhance your preview experience and streamline the process:

Activate the Data Flow Debug Mode in ADF to interactively test your data flows against a live Spark cluster. This provides a more accurate and real-time preview of your data, which can help in identifying and resolving issues efficiently. https://learn.microsoft.com/en-us/azure/data-factory/concepts-data-flow-performance

If the preview isn’t showing the latest data, use the "Refetch from source" option to retrieve updated information. This ensures the preview reflects the current state of your data. https://learn.microsoft.com/en-us/answers/questions/2068042/how-can-i-ensure-that-the-data-preview-in-adf-refl

Adopt best practices for improving data flow performance, such as managing partitioning, optimizing transformations, and using appropriate data types. Proper performance tuning can reduce bottlenecks and improve preview efficiency. https://learn.microsoft.com/en-us/azure/data-factory/concepts-data-flow-performance

For large datasets, use partitioning strategies to divide the data into manageable chunks. Additionally, apply sampling techniques to work with a representative subset of data during the preview, minimizing load times while maintaining visibility into the dataset. https://learn.microsoft.com/en-us/azure/data-factory/concepts-data-flow-performance

Consider automating the generation of data previews for multiple tables. You can create an ADF pipeline that iterates over a list of tables to generate previews automatically. This reduces manual effort and enhances scalability when dealing with many tables.

Utilize custom scripts or Azure Functions to streamline the preview process for numerous tables. Automating these tasks can save time and reduce manual intervention, especially in complex projects.

Ensure that data types and schemas are correctly defined and aligned with the source data. Mismatches in schema or data types can lead to errors or incomplete previews.

Take advantage of ADF’s built-in monitoring tools to track data flow performance and identify bottlenecks. These tools can help fine-tune configurations and resolve issues impacting the preview process. https://learn.microsoft.com/en-us/azure/data-factory/concepts-data-flow-performance

By implementing these strategies, you can optimize the preview experience in ADF Dataflow, even when managing large datasets or multiple tables.

I hope this is helpful! Do not hesitate to let me know if you have any other questions.

Please don't forget to close up the thread here by upvoting and accept it as an answer if it is helpful.
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Chandra Boorla 7,260 Reputation points Microsoft Vendor

2025-01-24T21:09:17.5833333+00:00

@Makrand Waghmare

Just checking in to see if the below answer provided by @ Smaran Thoomu helped.

If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.

1 answer

Smaran Thoomu 19,310 Reputation points Microsoft Vendor

2025-01-24T13:36:46.7066667+00:00

Hi @Makrand Waghmare
Welcome to Microsoft Q&A platform.

Thank you for reaching out and sharing your query about the data preview issue in Azure Data Factory (ADF) debug mode. We understand your concern and appreciate the screenshot you’ve shared.

Based on our analysis and discussions with the internal team, here are a few details and steps to address this:

Cause of the Issue: The issue occurs when there are numerous columns in the dataset, and the available screen size is insufficient to display the data preview clearly.

Steps to Mitigate: Please try refreshing your browser and retrying the operation. This often resolves the issue. If the issue persists, you may consider testing the same scenario in Azure Synapse Analytics, where improvements are actively being worked on to enhance visibility.

This issue has been fully addressed in Azure Data Factory (ADF). For Synapse Analytics, a fix is underway and should mitigate similar concerns in the near future.

If you continue to experience difficulties or have additional questions, please feel free to reach out, and we’ll be happy to assist further.

Hope this helps. Do let us know if you any further queries.

If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.
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In ADF Dataflow Preview i am not able to see the preview properly how to set this can anyone help

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