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*When an existing file is locked while it needs to be overwritten, the export function writes a new temporary file. The FileSweeper, a scheduled process, renames this file when the lock is removed from the original file. 
Figure 4.2 Deft-FEWS export configuration for archiving observations
Note: Not all information from observed (external historical) time series is archived. The data flags can be archived by setting the element "includeFlags" to true. The flag sources and users that made edits to the data is currently not archived.
Amalgamate observations
With daily exports of observed data per area, the number of small datasets on the file system may increases quickly. This has several disadvantages as the harvesting process will take longer processing many small datasets, while the performance of seamless integration (and webservices) will also drop. Therefore, an amalgamate process is developed which merges the daily observation files into one observation file per month. Currently, this amalgamate process is executed from the Fews-application side by an FSS by using the following configuration. Specify the relativePeriod in such way that the observed datafiles are stable and are not updated anymore. E.g. use one or two months of delay. There is no use in specifying a startOverrulable: when manually starrting this workflow it will only preocess the configured relativePeriod.
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