DocumentationReferenceUsing the CLIExporting and importing data

Exporting and importing data

From time to time you may want to export your application's data, e.g. for backup purposes, or to import data into a new application. For these scenarios, the wolkenkit CLI offers the export and import commands.

Exporting data

To export data you need to run wolkenkit export and provide a directory that you want to export your application's data into. This directory must either be empty or non-existent; if it doesn't exist, it will be created automatically:

$ wolkenkit export --to <directory>

This creates a directory <directory>/event-store for the events that have been stored by your application's write model. When the export has finished, you will find one or more files named events-<number>.json in this directory (where number is a 16-digit number padded with 0s). Each file contains an array of up to 65536 events.

Importing data

To import data you need to run wolkenkit import and provide a directory that contains the previously exported data you want to import. Please note that the event store of your application must be empty for this to work:

$ wolkenkit import --from <directory>

Use the right directory

For the import you have to specify the directory that you specified using the --to flag of the export command, not the sub-directory <directory>/event-store that was created for the events.

Once the import has finished, you need to reload your application by running the following command:

$ wolkenkit reload