Instructions on how to migrate from WSO2 Business Activity Monitor 2.x to WSO2 DAS are as follows.
...
The analytics data migration tool can be used to migrate the Cassandra column family data of a WSO2 BAM 2.x server to WSO2 Data Analytics Server (DAS) 3.0.0. The <DAS_HOME>/bin/analytics-migrate.sh script serves as the analytics migration tool.
...
Toolboxes concept of WSO2 Business Activity Monitor is replaced in WSO2 DAS by a CAR file based deployment approach. Since you need to map Hive queries to the Apache Spark syntax that is supported by WSO2 DAS, you cannot directly upload WSO2 BAM (2.x versions) toolboxes to WSO2 DAS. Thereby, you need to wrap all the artifacts (stream definitions, event receivers, event stores, event publishers, Spark scripts etc.) in a .car file and upload it to WSO2 DAS. For instructions on how to create a Carbon application with the CAR extension, see Carbon Application Deployment for DAS. However, you can use the analytics migration tool to migrate the data from Cassandra to the DAS datasource.