We have seen the different operations provided by the Skyvva App. All operations cannot handle millions of records and therefore we also support the Salesforce bulk API to provide you the ability to load millions of records. But using this mode you cannot use the Skyvva mapping which is the limitation of this operation mode. The Salesforce bulk mode is only available with the V3 rest connector module. If you have an old Salesforce bulk interface you have to migrate them using the V3 connector module.
Here is an example of the Bulk configuration.