When you use the Salesforce Bulk API, you can configure the session to permanently delete rows from Salesforce targets.
By default, when you use the Bulk API to delete data from Salesforce targets, the PowerCenter Integration Service copies the deleted rows to the recycle bin. You can retrieve the deleted rows until you empty the recycle bin. Until then, the deleted rows occupy space on the hard disk.
To permanently delete rows, you can configure a Bulk API target session to perform a hard delete. With a hard delete, the PowerCenter Integration Service permanently deletes rows, bypassing the recycle bin. You cannot recover data that the PowerCenter Integration Service deletes with the hard delete option.