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Run the <DAS_HOME>/bin/analytics-migrate.sh script to migrate data from WSO2 BAM to WSO2 DAS. For detailed information, see Analytics Migration Tool.
Handling indexes
The indexing mechanism in WSO2 DAS is different to that in WSO2 BAM. Therefore, the Cassandra custom and secondary indexes cannot be directly migrated to WSO2 DAS.
Recommended action
WSO2 DAS uses Apache Lucene for indexing. To use the Lucene indexing functionality, select the required stream attributes as index columns as described in Configuring Lucene Indexes.
Handling scripts
Scripts that analyze data in WSO2 BAM are written in the Apache Hive query language whereas the scripts in WSO2 DAS are written in the Apache Spark SQL query language. Therefore, the syntax of the scripts differ in WSO2 BAM and WSO2 DAS. Due to this, scripts cannot be directly migrated from WSO2 BAM to WSO2 DAS.
Recommended action
Redefine the required scripts in WSO2 DAS in the Spark query language. For detailed information on writing queries in the Spark SQL query language, see Spark SQL query language.
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The BAM Dashboard in WSO2 BAM is replaced with the Analytics Dashboard in WSO2 DAS. Since the two dashboards and their gadgets are configured differently, dashboards and gadgets cannot be directly migrated from WSO2 BAM to WSO2 DAS.
Recommended action
Redefine the required dashboards and gadgets in the Analytics Dashboard.
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