Storage mode

 Let’s take a closer look at the different types of Storage Modes.

Import mode

The Import mode allows you to create a local Power BI copy of your semantic models from your data source. You can use all Power BI service features with this storage mode, including Q&A and Quick Insights. Data refreshes can be scheduled or on-demand. Import mode is the default for creating new Power BI reports.

DirectQuery mode

The DirectQuery option is useful when you don't want to save local copies of your data because your data won't be cached. Instead, you can query the specific tables that you'll need by using native Power BI queries, and the required data will be retrieved from the underlying data source. Essentially, you're creating a direct connection to the data source. Using this model ensures that you're always viewing the most up-to-date data, and that all security requirements are satisfied. Additionally, this mode is suited for when you have large semantic models to pull data from. Instead of slowing down performance by having to load large amounts of data into Power BI, you can use DirectQuery to create a connection to the source, solving data latency issues as well.

Dual (Composite mode)

In Dual mode, you can identify some data to be directly imported and other data that must be queried. Any table that is brought in to your report is a product of both Import and DirectQuery modes. Using the Dual mode allows Power BI to choose the most efficient form of data retrieval.


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