Dear @Titus ,
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That's very interesting question you have posted. Please find some information related to Logstream Child Task LSN and Unidirectional Task LSN in Qlik Replicate.
Logstream Child Task LSN:
In a Logstream Child Task, the Log Sequence Number (LSN) is not used to resume the task. This is because a Logstream Child Task is part of a Log Stream, which is a dedicated Replicate task that saves data changes from the transaction log of a single source database and applies them to multiple targets. The Logstream Child Task inherits its position in the transaction log from the parent Log Stream. This means that the child task does not maintain its own position in the transaction log, but instead relies on the parent Log Stream for this information.
Unidirectional Task LSN:
In a Unidirectional Task, the LSN can be used to resume the task. This is because a Unidirectional Task directly reads from the transaction log of the source database. If the task is stopped for some reason, it can be resumed from the last known position in the transaction log, which is identified by the LSN. This means that the Unidirectional Task maintains its own position in the transaction log, independent of any other tasks.
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Deepak Ahirwar
