BulkOpResponseFilter creates a blocking response filter for the responses related to bulk IO/backup/restore/import: Export, Import and AddSSTable.

GetJobPayload loads the Payload message associated with the job.

GetSystemJobsCount queries the number of entries in the jobs table.

RunJob runs the provided job control statement, intializing, notifying and closing the chan at the passed pointer (see below for why) and returning the jobID and error result.

VerifySystemJob checks that that job records are created as expected.

WaitForJob waits for the specified job ID to terminate.