CAPPLES - A Capacity Planning and Performance Analysis Method for the Migration of Legacy Systems

摘要

Many organizations have a number of mission-critical systems that are out-of-date, but that are essential to their activities and cannot be discontinued. This problem is known as the Legacy System Dilemma, and it is usually solved by the migration of the existing systems to a completely new environment. Although there are many strategies and tools to perform this migration, no methods are available for evaluating the performance of the new system before its migration has been completed. This paper presents CAPPLES, a capacity planning and performance analysis method for the migration of legacy systems. A real case study is presented where CAPPLES was successfully applied to predict the behaviour of a new version of a mission-critical legacy system. Details of how to use CAPPLES, such as the characterisation of the synthetic workload and the simulation of the new system, are also provided.