Parallel database systems: the future of high performance database systems
Communications of the ACM
Database systems: principles, programming, performance
Database systems: principles, programming, performance
On algorithms for efficient data migration
SODA '01 Proceedings of the twelfth annual ACM-SIAM symposium on Discrete algorithms
Java Native Interface: Programmer's Guide and Reference
Java Native Interface: Programmer's Guide and Reference
The Butterfly Methodology: A Gateway-free Approach for Migrating Legacy Information Systems
ICECCS '97 Proceedings of the Third IEEE International Conference on Engineering of Complex Computer Systems
Introduction to the New Mainframe: z/OS Basics
Introduction to the New Mainframe: z/OS Basics
Continuous User Interfaces for Seamless Task Migration
Proceedings of the 13th International Conference on Human-Computer Interaction. Part III: Ubiquitous and Intelligent Interaction
Higher-Order Components for Grid Programming: Making Grids More Usable
Higher-Order Components for Grid Programming: Making Grids More Usable
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Any re-design of a distributed legacy system requires a migration which involves numerous complex data replication and transformation steps. Migration procedures can become quite difficult and time-consuming, especially when the setup (i.e., the employed databases, encodings, formats etc.) of the legacy and the target system fundamentally differ, which is often the case with finance data, grown over decades. We report on experiences from a real-world project: the recent migration of a customer loyalty system from a COBOL-operated mainframe to a modern service-oriented architecture. In this context, we present our easy-to-adopt solution for running most replication steps in a high-performance manner: the QuickApply HPC-software which helps minimizing the replication time, and, thereby, the overall downtime of the migration. Business processes can be kept up and running most of the time, while pre-extracted data already pass a variety of platforms and representations toward the target system. We combine the advantages of traditional migration approaches: transformations, which require the interruption of business processes are performed with static data only, they can be made undone in case of a failure and terminate quickly, due to the use of parallel processing.