7. Migrating from One View Instance to Another
If you have more than one instance of the same Ambari View, you can migrate view data (for example, entity data, instance data and View USE permissions) from one instance to another. This is useful when a new view version is released and you want to migrate the view data from a view instance for the previous version to a view instance on the newer version.
![[Note]](../common/images/admon/note.png) | Note |
|---|---|
Migrating view data between instances is only supported for Hive, Pig and Tez views. |
To migrate from view INSTANCEA (the source view instance) to view
INSTANCEB (the target view instance), an Ambari Administrator can run the
following command:
curl -v -u admin:admin -X PUT -H “X-Requested-By:1”
http://AMBARI_SERVER_HOST:8080/api/v1/views/VIEW_NAME/versions/TARGET_VIEW_VERSION/instances/INSTANCEB/migrate/SOURCE_VIEW_VERSION/INSTANCEA
where:
AMBARI_SERVER_HOSTis the Ambari Server hostname or IP addressVIEW_NAMEis the name of the viewTARGET_VIEW_VERSIONis the version of the target viewSOURCE_VIEW_VERSIONis the version of the source viewFor example, if you are migrating from version 1.0.0 to 1.0.1, your
SOURCE_VIEW_VERSIONwill be 1.0.0 andTARGET_VIEW_VERSIONwill be 1.0.1.
This command calls the method /migrate on the target instance and passes the original instance version and name.
To find out the view name, instance name, and view version:
In the Ambari web UI, browse to the Ambari Administration interface.
Click .
Open a specific view.
For example:
