gtpm1m3rTPF V4R1 Migration Guide: 3.1 to 4.1

Online File Recoup

Online file recoup is a package used to return (or recoup) file pool addresses that were lost because of software errors or unplanned system restarts. Online file recoup also verifies the system fixed records and the chains of records attached to them.

Online file recoup consists of 4 major phases (Phase 1, Phase 2, Phase 3, and Phase 4), an initialization phase, and several optional phases. See TPF Operations for more information about online file recoup and a description of each phase.

Enhancements to Online File Recoup (APAR PJ21224)

Online file recoup has been enhanced through APAR PJ21224. By applying this APAR to your TPF 4.1 system, you can:

Highlights

The following highlights some of the enhancements provided to online file recoup through APAR PJ21224. Online file recoup now provides for:

Migration Considerations

When applying APAR PJ21224, keep the following migration considerations in mind:

If IBM TPFDF 1.1.3 is installed, you must also apply APAR PN78979 for IBM TPFDF.

Returning from Recoup GROUP Macro Exit Code

If you run loosely coupled non-multiple database function (MDBF) systems with processor unique fixed file records as the anchors to long-term pools, and use the ENT= parameter of the GROUP macro to determine whether to process in this processor, you must use the following instruction to return from your exit code:

    B 8(R6)

This instruction indicates that you want to process the descriptor. If you use BR R6 to return from your ENT= exit code, this is no longer supported in the TPF 4.1 system. Consistent with MDBF ENT= exit support, this return indicates that chain-chase processing will not take place for this particular GROUP (USE=BASE) macro.