The implementation of management migration can be divided into three stages: preparation before management migration, implementation of management migration, and verification after management migration. Due to the characteristics of management migration, a large amount of work needs to be completed in the preparation stage. Sufficient and thoughtful preparation is the main basis for completing management migration. Specifically, it is necessary to provide a detailed description of the data source to be migrated (including the storage method of the data, the amount of data, and the time span of the data); to establish a data dictionary of the old and new system databases; to conduct a quality analysis of the historical data of the old system, and to Difference analysis of structures; Difference analysis of code data between the old and new systems; Establishing mapping relationships between database tables of the old and new systems, and handling methods for fields that cannot be mapped; Developing and deploying ETL tools, writing test plans and verification procedures for data conversion; formulating data Conversion contingency measures.
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