1.Override
- 1.With Impala, you can query data, whether stored in HDFS or Apache HBase – including SELECT, JOIN, and aggregate functions – in real time
- 2.Furthermore, Impala uses the same metadata, SQL syntax (Hive SQL), ODBC driver, and user interface (Hue Beeswax) as Apache Hive, providing a familiar and unified platform for batch-oriented or real-time queries
2.安装
1.impala-state-store -- 协调服务 主节点
2.impala-catalog --名称服务 主节点
3.impala-server(impalad) 节点服务 子节点
4.impala-shell 交互服务 可以部署在任意几点上
- 将core-site.xml hdfs-site.xml和hive-site.xml拷贝到/etc/impala/conf下