1. Lens Server REST API for querying and schema update JDBC Client Java Client CLI Applications – Reporting, Ad Hoc Queries OLAP Cube Metastore Hive (MR) JDBC Spark SQL Pluggable Execution Engines Driver API Based on underlying Hive Metastore/HCatalog HDFS HBase Columnar DWH S3 Data Stores LENS Redshift

2. NEW QUEUED RUNNING LAUNCHED SUCCESSFUL CLOSED CANCELLED FAILED Query cancelled by user Query purged from memory by Lens Server Query submitted Semantic Analysis Failed Failed in Driver Submitted to Driver EXECUTED

3. Query Service Metastore Service Session Service Event Service Hive Driver JDBC Driver JAX-RS (Jersey) Lens Server Modules Authentication and Authorization Scheduler service Other Drivers

4. Lens Server My SQL Hive Metastore Server Hive Server2 Columnar DWH JDBC Driver