• Journal of Digital Convergence
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• v.12 no.11
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• pp.317-327
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• 2014

In present company has been developed various systems for work efficiently and organized. However, each work developed Systems Environment differently by rapid IT advancement; it requires a lot of maintenance cost. Recently many companies need to do systems integration or downsizing migration to save costs for IT maintenance, but most of companies are now develop migration with built new systems by manual work or modify some part only. Also migration requires high cost. In this paper, by focusing in application on the environment of the system components, propose the recycling and utilization of automation tools, application method to reduce the migration cost.

• The KIPS Transactions:PartD
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• v.14D no.7
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• pp.763-772
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• 2007

Due to increased software development cost, interest about the method and automated tool for reusing legacy system have been running high. Therefore, In this study, it proves the definition, concept and also background of legacy system by showing real market and technology trend. Automation tool is designed and developed to handle the concrete development methodology, procedure and reference. Also, we implemented the process that analyze the legacy system and extract, refine, store and reuse the candidate components by using LM(Legacy to Modern System) supporting tool presented in this paper. If LM supporting tool is applied to legacy system migration, we can expect cutting costs, shortening the developing period and succeeding the intellectual property by software re-engineering.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.8 no.6
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• pp.1428-1442
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• 2007

Nowadays, as IT environment is changing rapidly, traditional infra system such as hardware, software, and development methodology are changing as well. Legacy system has been filled with Intellectual property such as invested budget and development period for the time of IT is developing. Many countries around the world are having troubles with how to manage the legacy system. It is time to study on a development method and the implementation of supporting tool to reuse or process the legacy system. In this paper, it proves the definition, concept and also background of legacy system by showing real market and technology trend. Developed to handle the concrete development methodology, procedure and reference. We can get more profitability and productivity advance by reuse of legacy system and maintenance cost-saving through legacy migration.

• The Journal of Bigdata
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• v.6 no.1
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• pp.145-151
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• 2021

In recent years, digital data has been generated in all areas of human activity, and there are many attempts to safely store and process the data to develop useful services. A data lake refers to a data repository that is independent of the source of the data and the analytical framework that leverages the data. In this paper, we designed a tool to safely store various big data generated by smart cities in a data lake and ETL it so that it can be used in services, and a web-based tool necessary to use it effectively. Implement. A series of processes (ETLs) that quality-check and refine source data, store it safely in a data lake, and manage it according to data life cycle policies are often significant for costly infrastructure and development and maintenance. It is a labor-intensive technology. The mounting technology makes it possible to set and execute ETL work monitoring and data life cycle management visually and efficiently without specialized knowledge in the IT field. Separately, a data quality checklist guide is needed to store and use reliable data in the data lake. In addition, it is necessary to set and reserve data migration and deletion cycles using the data life cycle management tool to reduce data management costs.