Configuration files

You can refer to this section for parallel engine configuration files, and their uses and syntax.

This section describes parallel engine configuration files, and their uses and syntax. The parallel engine reads a configuration file to ascertain what processing and storage resources belong to your system. Processing resources include nodes; and storage resources include both disks for the permanent storage of data and disks for the temporary storage of data (scratch disks). The parallel engine uses this information to determine, among other things, how to arrange resources for parallel execution.

You must define each processing node on which the parallel engine runs jobs and qualify its characteristics; you must do the same for each disk that will store data. You can specify additional information about nodes and disks on which facilities such as sorting or SAS operations will be run, and about the nodes on which to run stages that access the following relational data base management systems: DB2®, INFORMIX, and Oracle.

You can maintain multiple configuration files and read them into the system according to your needs.

A sample configuration file is located in Configurations directory under the Server directory of your installation, and is called default.apt..

This section contains the following subsections:

• "The Default Path Name and the APT_CONFIG_FILE"
• "Syntax"
• "Node Names"
• "Options"
• "Node Pools and the Default Node Pool"
• "Disk and Scratch Disk Pools and Their Defaults"
• "Buffer Scratch Disk Pools"