从2015年6月开始，Hive有两条主线（main-line），branch-1和master，分别对应的hive版本是hive1.x以及hive2.x，hive2.x不向后兼容hive1.x。这些区别是社区在hive1.3发布之后做的改变（分成了branch-1和master）。有时候release的版本号和原始分支号不同，具体的如下：

release number	original number
1.0.0	0.14.1
1.1.0	0.15.0
2.3.0	2.2.0

Hive使用JIRA控制全部的代码、文档、infra，Fix Version/s中会显示这个issue/feature完成的分支内容。

配置管理见confluence

• Hive by default gets its configuration from <install-dir>/conf/hive-default.xml
• The location of the Hive configuration directory can be changed by setting the HIVE_CONF_DIR environment variable(hive-site.sh).
• Configuration variables can be changed by (re-)defining them in <install-dir>/conf/hive-site.xml
• Log4j configuration is stored in <install-dir>/conf/hive-log4j.properties
• Hive configuration is an overlay on top of Hadoop – it inherits the Hadoop configuration variables by default.
• Hive configuration can be manipulated by:
  • Editing hive-site.xml and defining any desired variables (including Hadoop variables) in it
  • Using the set command (see next section)
  • Invoking Hive (deprecated), Beeline or HiveServer2 using the syntax:
    • bin/hive --hiveconf x1=y1 --hiveconf x2=y2 //this sets the variables x1 and x2 to y1 and y2 respectively
    • bin/hiveserver2 --hiveconf x1=y1 --hiveconf x2=y2 //this sets server-side variables x1 and x2 to y1 and y2 respectively
    • bin/beeline --hiveconf x1=y1 --hiveconf x2=y2 //this sets client-side variables x1 and x2 to y1 and y2 respectively.
  • Setting the HIVE_OPTS environment variable to --hiveconf x1=y1 --hiveconf x2=y2 which does the same as above.
• 在hive-cli或者beeline中使用set <setting-name>=<value>;完成设置

• 查看指定配置: set <setting_name>;
• 查看全部配置：set;
• 查看和hadoop不一样的配置：set -v;

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