How dataset options affect values that a virtual user retrieves

The Open, Access, and Wrap modes that you select for a dataset affect the values that a virtual user retrieves.

The following table lists the most common types of datasets and the options that you select to create them.

Dataset purpose Open mode selection Access mode selection Wrap mode selection
The virtual user retrieves the value from the current row of the dataset in a random order for every attempted transaction. Note that before accessing each row of the dataset the order of the rows is rearranged. Shared (for all test executions) Shuffled Fetch only once per user
The virtual user retrieves the value from the current row of the dataset in sequential order for every attempted transaction. Shared (for all test executions) Sequential Fetch only once per user
The virtual user retrieves the value from the beginning of the row of a dataset in a random order for every attempted transaction. Shared (per test execution) Random Wrap when the last row is reached
The virtual user retrieves the value from the current row of a dataset in sequential order for every attempted transaction. When a test reaches the end of a dataset, it reuses the data from the current row selection of the dataset. Shared (for all test executions) Sequential Wrap when the last row is reached
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