Binary Key Bridging Pattern — Solving STCK Surrogate Key CDC Serialization Failures in Qlik Replicate

krishankumar — Sun, 04 Oct 2026 20:09:33 GMT

I wanted to share a technical white paper I published that documents
a novel solution to a CDC serialization challenge in Qlik Replicate
during mainframe-to-cloud migration.

THE PROBLEM:
STCK-based binary surrogate keys in mainframe MIS systems cause CDC
serialization failures in Qlik Replicate when migrating to AWS Aurora
PostgreSQL. The binary format breaks change event ordering and
traceability during active migration.

THE SOLUTION — Binary Key Bridging Pattern:
A dual-key architecture that preserves the original STCK binary key
while generating a UUID surrogate key for cloud-native compatibility.
This enables reliable CDC without data loss or event ordering failures
during zero-downtime migration.

This pattern is part of a broader 5-layer Live Data Coexistence
Framework (LDCF) that enables enterprise MIS modernization without
system downtime.

Published Paper:
Zenodo: https://zenodo.org/records/21313169
LinkedIn Post: https://lnkd.in/p/gaA4tN3n

Has anyone else encountered STCK binary key issues with Qlik Replicate
on mainframe sources? Would welcome feedback from the Qlik engineering
or product team.

Krishan Kumar

topic Binary Key Bridging Pattern — Solving STCK Surrogate Key CDC Serialization Failures in Qlik Replicate in Qlik Replicate

Binary Key Bridging Pattern — Solving STCK Surrogate Key CDC Serialization Failures in Qlik Replicate