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Each imported data record is imported immediately (and by its own) into the database. The according fast-track tasks are handled by the task handler, therefore the fast-track task ends up in the task-queue.
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All imported data records get written to the database as soon as they are processed by the import (each on its own). The according fast-track tasks are collected up to bulks of a certain amount of data records (by default 100) 20 records and are set as bulk-fast-track tasks to the queue by the task-handler.
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