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1) Cross platform query capability, not only SQL on Hadoop
2) Distributed under the Apache license, now supported by Teradata
3) Open source distributed SQL query engine
- Originally developed by facebook
- ANSI SQL compliant
- Like Hive, It's not a database
4) Pluggable architecture: Hive, cassandra, kafka etc
|Computation approach||MapReduce||MPP||Massively parallel processing(MPP) architecture|
|Main purpose||Data warehouse||RDBMS||Enable analysis and data scientists to directly interact with any data stored in Hadoop|
|Latency||High||Low latency||Low latency|
|Language||SQL like script||ANSI 92 SQL support with user defined function||ANSI 92 SQL support with user define functions|
|Interface||CLI Web, ODBC, JDBC||JDBC||ODBC, JDBC, impala-shell, web|
|Replication||yes||unknown||Supported between two CDH5 clusters|