*************** Preliminary *************** =================================== catalog-site.xml and tajo-site.xml =================================== Tajo's configuration is based on Hadoop's configuration system. Tajo uses two config files: * catalog-site.xml - configuration for the catalog server. * tajo-site.xml - configuration for other tajo modules. Each config consists of a pair of a name and a value. If you want to set the config name ``a.b.c`` with the value ``123``, add the following element to an appropriate file. .. code-block:: xml a.b.c 123 Tajo has a variety of internal configs. If you don't set some config explicitly, the default config will be used for for that config. Tajo is designed to use only a few of configs in usual cases. You may not be concerned with the configuration. In default, there is no ``tajo-site.xml`` in ``${TAJO}/conf`` directory. If you set some configs, first copy ``$TAJO_HOME/conf/tajo-site.xml.templete`` to ``tajo-site.xml``. Then, add the configs to your tajo-site. ============ tajo-env.sh ============ tajo-env.sh is a shell script file. The main purpose of this file is to set shell environment variables for TajoMaster and TajoWorker java program. So, you can set some variable as follows: .. code-block:: sh VARIABLE=value If a value is a literal string, type this as follows: .. code-block:: sh VARIABLE='value'