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Added section relating to clearing data from Blaze (#303)

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DavidCroftDKFZ
2025-05-22 18:01:43 +02:00
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@ -340,6 +340,24 @@ The storage space on your hard drive will depend on the number of FHIR resources
For more information on Blaze performance, please refer to [import performance](https://github.com/samply/blaze/blob/master/docs/performance/import.md).
### Clearing data
The Bridgehead's FHIR store, Blaze, saves its data in a Docker volume. This means that the data will persist even if you stop the Bridgehead. You can clear existing data from the FHIR store by deleting the relevant Docker volume.
First, stop the Bridgehead:
```shell
sudo systemctl stop bridgehead@<PROJECT>.service
```
Now remove the volume:
```shell
docker volume rm <PROJECT>_blaze-data
```
Finally, restart the Bridgehead:
```shell
sudo systemctl start bridgehead@<PROJECT>.service
```
You will need to do this for example if you are using a VM as a test environment and you subsequently want to use the same VM for production.
#### ETL for BBMRI and GBA
Normally, you will need to build your own ETL to feed the Bridgehead. However, there is one case where a short cut might be available: