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+# sda-pipeline: sync
+
+The sync service is used exclusively in the [Bigpicture](https://bigpicture.eu/) project.
+
+## Service Description
+
+The sync service facilitates replication of data and metadata between the nodes in the consortium.
+
+When enabled the service will perform the following tasks:
+
+1. Read messages from the configured queue (sent by the mapper service upon succesful completion of a dataset maping).
+   1. Generate a JSON blob with the required file and dataset information required to start and complete ingestion of a dataset on the recieving node.
+   2. Send the JSON blob as POST request to the recieving partner.
+2. Upon recieving a POST request with JSON data to the `/dataset` route.
+   1. Parse the JSON blob and check if dataset is already registered, exit if true.
+   2. Build and send messages to start ingestion of files.
+   3. Build and send messages to assign stableIDs to files.
+   4. Build and send messages to map files to a dataset.