The IST service is a facility which allows multiple OpenTP1 systems to share one or more tables across nodes. A table available with the IST service is called an internode shared table. An internode shared table can be used to reference or update its data from a UAP without recognizing the node at which the entity of the table exists. It can also be used as mail for managing the status of any job at each node. However, when data is distributed across multiple nodes, the IST service should not be used for the following jobs:

• Job that require immediate distribution of data
• Job that handles large amounts of data
• Job that updates data frequently

Before internode shared tables can be used, TP1/Shared Table Access must be installed in the system at each node. The IST service is available only when the basic OpenTP1 facilities are provided by TP1/Server Base. It is unavailable with TP1/LiNK.

Organization of this section

4.3.1 System configuration of IST service

4.3.2 Outline of internode shared tables

4.3.3 Procedure for accessing an internode shared table

4.3.4 Lock for internode shared tables