Data services
Data services focus on reestablishing an application program’s position within non-DBMS data sets at restart. Data services can also provide availability, integrity, and performance enhancements for supported data sets. AR/CTL provides the following data services, depending on the type of application program and the AR/CTL products you have:
- Sequential file interception
- Local VSAM access
- Remote VSAM access (file sharing)
- GSAM replacement
- ASAM callable interface
- DB2 cursor repositioning
- Program exception handling
- SQL return code handling
- Unit-of-work boundaries
In a non IMS environment, an application program must use AR/CTL checkpoint/restart services to use repositioning.
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