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Within Delft-FEWS, the datasets are exported to the archive in a workflow using the ExportArchiveModule. This workflow needs to be scheduled on a regular interval to archive all relevant data. Simulated data sets are preferably exported to the archive from the workflow which that created the simulation. This is especially the case when modifiers are used in the simulation. When a simulation is not exported to the archive directly, it might be that some modifiers which are that were used in the simulation are deleted are or changed in between. This will cause that it won't be possible to archived all the used modifiers correctlythe mean time. This can then result in archived simulation data without the modifiers that were used to produce them.
To prevent dependencies on other processes, the ExportArchiveModule is envisioned to write directly into the archive file storage. The FSS thus needs to be able to have write access to those disks.
For each kind of dataset, the ExportArchiveModule checks the database for changes over a (configured) relative period. It exports any all data which that meets the export instructions and that has changed within this period. Datasets are archived in a pre-defined predefined directory structure, which is based on areaId, date and dataset name.
The schema of the associated configuration file (Figure 4.1) is defined at:
http://fews.wldelft.nl/schemas/version1.0/exportArchiveModule.xsd.
Figure 4.1 Top level of Delft-FEWS exportArchiveModule.xsd
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Archiving by using time series sets or workflow selection
The FEWS archive export exporting module has several exports in which data can be archivedoptions for exporting data. In all those exports, time series can be selected by either specifying the time series by using time series sets or it is possible to define by specifying a workflow in combination with a time series filter. In this case When specifying a workflow, all the time series which that comply to with the defined filter will be exported. By default the filter will be applied to the time series of the current workflow. If a workflow id is defined then the data from the last or current run will be used. Or if One can also define a period is defined then , whereby all simulations or external forecasts for the defined that period will are be exported.
The path to which the data will be archived will not differ between the two options.
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