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The original Taskruns are deleted from the TaskRuns database table after successful run of the ImportAmalgamate module. To make sure the configured workflows are successfully amalgamated and not removed by the rolling barrel it is best to configure a large expiry time for the amalgamated workflows (import, process) in the workflowDescriptors.xml. Also the amalgamation task expiry time should be set (via the AdminInterface) to the largest expiry time for the workflows in the amalgamation task. Furthermore, do not forget to configure an explicit expiry time for the time series sets in the workflows that are amalgamated. The expiry time of the individual time series is preserved while amalgamated.
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