reporting on data lake

[powerbiexpert22]

is it good idea to build power bi reports directly on data lake (Azue Data Lake Storage) compare with data warehouse (Snowflake) , will there be any performance issue while building report on data lake?

[sevenhills]

My 2 cents: We all know ADLS is slow for consuming directly in Power BI. You can add dataflow and datasets as additional steps to consume in Power BI. This is one approach. I did this approach for a project and going smooth.

For ad-hoc or once in a while reports, you can consume ADLS data, which could be slow. 

For regular reports, building Fact-Dim model, say dataflow+dataset or Snowflake, will always is your better choice for Power BI consumption. 

Thanks

[ahadkarimi]

Hi @powerbiexpert22, building Power BI reports straight off a data lake is doable, but it can be slow and clunky compared to using a slick data warehouse like Snowflake. Data lakes ain't optimized for heavy-duty querying, so you might hit performance issues, especially with big datasets. Best bet? Use the lake for storage and the warehouse for speed when you need those reports snappy.

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